Sudlersville Wastewater Treatment Plant ENR Improvement Project — Bid BPM058134

Notice July 27, 2026 · 480 page(s) in the original

This is the document's text, extracted automatically. Headings and paragraphs are inferred from the original's layout, so the arrangement may differ from the published version — the words do not. Where it matters legally, the original governs.

Original document ↗

Bid Number: BPM058134 Category: Public Works Status: Open Publication Date/Time: 7/27/2026 12:00 AM Closing Date/Time: 9/1/2026 9:00 AM Contact:

Detail page: https://www.qac.org/bids.aspx?bidID=325 Attachments:

- Sudlersville WWTP ENR Improvements - Project Manual (https://www.qac.org/DocumentCenter/View/26152)

- Sudlersville Drawings 6.5.26 (https://www.qac.org/DocumentCenter/View/26153)

Description:

Sealed bids for the construction of a Post Anoxic Reactor (PAR) tank at the Sudlersville Wastewater Treatment Plant (575 Thunder Road) in northern Queen Anne's County, Maryland will be received from qualified bidders by the County Commissioners of Queen Anne's County at the Queen Anne's County Sanitary District, 310 Bateau Drive, Stevensville, Maryland 21666 until 9:00 a.m. local time on September 1, 2026 at which time they will be opened publicly and read aloud. Note this is a different location than the pre-bid location. The overall project is to enhance the plant’s nitrogen removal processes which are currently inadequate to reliably meet permit standards. The work of this contract, Contract No. SAN 26-01, consists of the rehabilitation of the existing Biolac reactor via the removal of accumulated sludge and the full replacement of the air diffusers, replacing and enhancing the current chemical feed delivery system, the construction of a cast-in-place concrete PAR tank, and associated electrical and system control facilities.

[Attached specification: Sudlersville WWTP ENR Improvements - Project Manual]

QUEEN ANNE'S COUNTY

DEPARTMENT OF PUBLIC WORKS

JUNE 2026

PROJECT MANUAL

CONTRACT 26-01

SUDLERSVILLE WASTEWATER TREATMENT PLANT

ENR IMPROVEMENT PROJECT

PROPOSAL DUE

SEPTEMBER 1, 2026 AT 9:00 AM

I hereby certify that these documents were prepared or approved by me, and that I am a duly licensed professional engineer under the laws of the state of Maryland, License No. 30728, expiration date: 06-30-28.

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project

TECHNICAL SPECIFICATIONS

* Denotes a Queen Anne’s County Standard Specification that is referenced/amended in these

Technical Specifications. The Queen Anne’s County Standard Specifications can be found here.

Division 0 – Contract and Bidding Requirements Section Bidding Requirements Invitation to Bid ........................................................................................................................ 00030 Instructions to Bidders ............................................................................................................. 00100 Bid Form .......................................................................................................... 00330

Bid Bond .................................................................................................................................. 00410 Bidder's Experience ................................................................................................................. 00415 Subcontractor & Supplier List .................................................................................................. 00417

Certification of Non-Segregated Facilities ............................................................................... 00418 Certification of Equal Employment Opportunity ....................................................................... 00419 Non-Collusion Certification ...................................................................................................... 00420 Affirmative Action Plan Certification ........................................................................................ 00421

Conflict of Interest Disclosure .................................................................................................. 00422 MDE Revolving Loan Fund Contract Provisions Maryland Revolving Fund Requirements ............................................................................... 00450 Prevailing Wage Rates ............................................................................................................ 00455

Contract Forms Agreement ............................................................................................................................... 00530 Performance Bond .................................................................................................................. 00610 Payment Bond ......................................................................................................................... 00620

Maintenance Bond .................................................................................................................. 00630 Application for Payment Affidavit ............................................................................................. 00690 Conditions of Contract General Conditions .................................................................................................................. 00700

Supplemental Conditions Specifications ................................................................................. 00800 General Requirements ............................................................................................................ 00900 Measurement and Payment .................................................................................................... 00950 Division 1 - General Requirements Section

Summary of Work .................................................................................................................... 01000 Field Engineering .................................................................................................................... 01050 Submittals ................................................................................................................................ 01300

Quality Control ........................................................................................................................ 01400 Construction Facilities and Temporary Controls ..................................................................... 01500 Reliability Testing .................................................................................................................... 01650

Project Close-Out .................................................................................................................... 01700 Division 2 - Site Work Section Demolition and Removal ......................................................................................................... 02050

JUNE 2026 TOC-1 TABLE OF CONTENTS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project Clearing and Grubbing* ............................................... See Queen Anne’s County Std. Spec 02100 Earthwork ................................................................................................................................ 02200 Finish Grading and Seeding ........................................ See Queen Anne’s County Std. Spec 02485

Yard Piping .............................................................................................................................. 02600 Division 3 - Concrete Section Cast-in-Place Concrete ........................................................................................................... 03300 Grout........................................................................................................................................ 03600

Division 4 – Masonry Section Not Used Division 5 – Metals Section Miscellaneous Metals .............................................................................................................. 05500 Division 6 - Wood & Plastics Section Not Used Division 7 - Thermal & Moisture Protection Section Roofing Panels ........................................................................................................................ 07410

Division 8 - Doors & Windows Section Not Used Division 9 - Finishes Section Painting.................................................................................................................................... 09900 Division 10 – Specialties Section Signs........................................................................................................................................ 10400

Safety Equipment .................................................................................................................... 10520 Division 11 - Equipment Section Slide Gates .............................................................................................................................. 11285 Submersible Mixers ................................................................................................................. 11321

Chemical Feed Pumping Equipment ....................................................................................... 11345 Chemical Storage .................................................................................................................... 11346 Robotic Biosolids Removal from Biolac Aeration Basin ......................................................... 11350 Package Blower System ......................................................................................................... 11375

Miscellaneous Biolac System Improvements .......................................................................... 11389 Division 12 - Furnishings Section Not Used

JUNE 2026 TOC-2 TABLE OF CONTENTS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project Division 13 - Special Construction Section Baffle Walls .............................................................................................................................. 13006 Metering and Instrumentation .................................................................................................. 13330 Division 14 - Conveying Systems Section

Davit Cranes and Hoists .......................................................................................................... 14620 Division 15 - Mechanical Section Mechanical Piping and Accessories ........................................................................................ 15060 Division 16 – Electrical Section General Electrical Requirements ............................................................................................. 16010

Power System Study and Testing ........................................................................................... 16011 Miscellaneous Electrical Devices ............................................................................................ 16051 Raceways, Boxes, and Fittings ............................................................................................... 16110 Wires and Cables .................................................................................................................... 16120

Switches and Receptacles ...................................................................................................... 16140 Low-Voltage Motor Centers ..................................................................................................... 16155 Variable Frequency Drives ...................................................................................................... 16157

Panelboards ............................................................................................................................ 16160 Grounding ................................................................................................................................ 16450 Dry Type Transformers............................................................................................................ 16460

Lighting .................................................................................................................................... 16500 Surge Suppression .................................................................................................................. 16670 Heat Trace ............................................................................................................................... 16855

General Control System Requirements ................................................................................... 16900 Control System Equipment ...................................................................................................... 16942 Cabinets, Panels, Consoles & Devices ................................................................................... 16946 Description of Operation .......................................................................................................... 16965

Appendices

Appendix A – Geotechnical Report

Appendix B – Existing Wastewater Treatment Plant Plans “As-Builts” – For General Reference Only

JUNE 2026 TOC-3 TABLE OF CONTENTS

BIDDING REQUIREMENTS

CONTRACT NO. SAN 26-01

00030 Invitation for Bid 00100 Instructions to Bidders 00330 Bid Form 00410 Bid Bond 00415 Bidder's Experience 00417 Subcontractor List 00418 Certification of Non-Segregated Facilities 00419 Certification of Equal Employment Opportunity 00420 Non-Collusion Certification 00421 Affirmative Action Plan Certification 00422 Conflict of Interest Disclosure 00450 MDE State Grants Insert 00455 Maryland Prevailing Wage Rates

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

INVITATION TO BID

time they will be opened publicly and read aloud. Note this is a different location than the pre-bid location.

The overall project is to enhance the plant’s nitrogen removal processes which are currently inadequate to reliably meet permit standards.

The work of this contract, Contract No. SAN 26-01, consists of the rehabilitation of the existing Biolac reactor via the removal of accumulated sludge and the full replacement of the air diffusers, replacing and enhancing the current chemical feed delivery system, the construction of a cast-in-place concrete PAR tank, and associated electrical and system control facilities.

Copies of the Contract Documents may be obtained beginning July 29, 2026. Contract Documents will be available at no cost in electronic format (only in .pdf format) at ebidmarketplace.com and the Queen Anne’s County web page:

Login: eMaryland Marketplace Advantage (eMMA) https://www.qac.org/Bids.aspx A notice of an addendum posting will be sent to all known plan holders. Any Addenda issued shall be issued via electronic posting on the ebidmarketplace.com and Queen Anne’s County Procurement websites. However, it is the Bidders responsibility to ensure receipt of all addenda.

A pre-bid meeting will be held at the Sudlersville Town Hall – 200 South Church Street (aka Md Rt 313), Sudlersville Maryland at 11:00 a.m. local time on August 19. While the pre-bid is not mandatory, a site visit is mandatory. To that end Bidders may visit the site prior to the pre-bid at 9:00 a.m. Bidders shall coordinate with the County Project Manager for site visits beyond the one associated with the pre-bid meeting.

Bidders on this work will be required to comply with:

1. The President's Executive Order No. 11246 as amended by Executive Order

11375. The requirements for bidders and contractors under this order are explained in the Contract Documents.

2. The facilities to be constructed under this Invitation to Bid will include funds

from the Maryland Bay Restoration Grant Fund. Bidders will be required to

6/5/2026 00030-1 INVITATION TO BID

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project comply State requirements pertaining to minority business enterprise and women's business enterprise.

3. The Maryland Prevailing Wage Rates labor standards provisions are

applicable to this contract.

4. The successful bidder will be required to place both a Performance Bond

and a Payment Bond, each in the amount of 100% of the contract price, and a Maintenance Bond in the amount of 5% of the contract price.

Each Bidder must submit a bid security of not less than five (5) percent with his bid, in the form and subject to the conditions provided in the Instructions to Bidders. Bids to remain open for 150 days. No bidder may withdraw his bid within one hundred fifty (150) days after the actual date of the opening thereof in order to secure Board of Public Works funding.

The Owner reserves the right, in the exercise of its sole judgment, to reject any or all Bids, and to re-advertise and award the Contract in the regular manner, or to waive any informalities, irregularities, mistakes, errors or omissions in any Bid received and to accept any Bid deemed to be responsive to this invitation and favorable to the interests of the County.

The County Commissioners of Queen Anne’s County

6/5/2026 00030-2 INVITATION TO BID

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project

INSTRUCTIONS TO BIDDERS

1. DEFINED TERMS

1.1 Terms used in these Instructions to Bidders, are defined and have the meanings assigned to them in the General Conditions.

1.2 The term "Lowest Responsible Responsive Bidder" means the Bidder to whom OWNER (on the basis of OWNER's evaluation as hereinafter provided) makes an award on the basis of the total bid.

1.3 The term "OWNER" as used in the Contract Documents refers to the County Commissioners of Queen Anne's County. Project Manager for the OWNER shall be Matt Lucas, Chief Sanitary ENGINEER, Department of Public Works, Queen Anne's County, Department of Public Works, 310 Bateau Drive, Stevensville, MD 21668, phone number: 410-643-3535. E-mail:

mlucas@qac.org.

1.4 The term "ENGINEER" refers to the engineering firm shown on the design drawings. All inquiries during the bidding period should be addressed to the OWNER’s Project Manager who will distribute the questions to the ENGINEER as necessary.

2. COPIES OF BIDDING DOCUMENTS

2.1 Complete sets of the Bidding Documents may be obtained digitally as noted in the Invitation to Bid.

2.2 Complete sets of Bidding Documents shall be used in preparing Bids; neither OWNER nor ENGINEER assume any responsibility for errors or misinterpretations resulting from the use of incomplete sets of Bidding Documents.

2.3 OWNER and ENGINEER in making Bidding Documents available on the above terms do so only for the purpose of obtaining Bids on the Work and do not confer a license or grant for any other use.

2.4 It is the Bidder’s sole responsibility to ensure they are in receipt of any and all addenda issued in the preparation of their Bid as is stated in the Invitation to Bid.

3. QUALIFICATIONS OF BIDDERS

3.1 All Bidders must be able to demonstrate that at least 50% of the Work (by dollar) is to be completed with their own forces.

3.2 To further demonstrate qualifications to perform the Work, each Bidder must be prepared to submit within five days of OWNER's request, written evidence such as financial data, previous experience and evidence of authority to conduct business in the jurisdiction where the Project is located.

4. EXAMINATION OF CONTRACT DOCUMENTS AND SITE

4.1 Before submitting a Bid, each Bidder must (a) examine the Contract

6/5/2026 00100-1 INSTRUCTIONS TO BIDDERS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project Documents thoroughly, (b) must visit the site to familiarize himself with local conditions that may in any manner affect cost, progress or performance of the Work, (c) familiarize himself with federal, state and local laws, ordinances, rules and regulations that may in any manner affect cost, progress or performance of the Work; and (d) study and carefully correlate

Bidder's observations with the Contract Documents.

Bidder shall correlate the information known to Bidder, information and observations obtained from visits to the Site, reports and drawings identified in the Bidding Documents, and all additional examinations, investigations, explorations, tests, studies, and data with the Bidding Documents and promptly give OWNER and ENGINEER written notice of all conflicts, errors, ambiguities, or discrepancies that Bidder discovers in the Bidding Documents

and confirm that the written resolution thereof by OWNER and ENGINEER is acceptable to Bidder.

4.2 Reference is made to the General Conditions and Supplemental Conditions for the identification of those reports of investigations and tests of subsurface physical conditions and subsurface utilities at the site or otherwise which have been relied upon by ENGINEER or their agent in preparing the Drawings and Specifications. OWNER will make such reports available to Bidder via

Appendix A.

These reports are not guaranteed as to accuracy or completeness, nor are they part of the Contract Documents. The Contractor must assume all risks in excavating for this Project and shall not be entitled to rely on any subsurface information obtained for the ENGINEER or indirectly from the OWNER. Bidders, in using this information, thereby release OWNER and ENGINEER of all liability as to the information contained within

the subsurface information, and such Bidders accept such subsurface information in accordance with the provisions of the General Conditions.

Before submitting his Bid each Bidder will, at his own expense, conduct such investigations and tests as the Bidder may deem necessary to determine his Bid for performance of the Work in accordance with the time, price and other terms and conditions of the Contract Documents.

4.3 If the Bidder does not take advantage of the site visit planned prior to the prebid, and upon 1 week in advance notification, OWNER will allow each Bidder to access the site in order to conduct such investigations and tests as each Bidder deems necessary for submission of his Bid. Bidder shall coordinate with the County Project Manager to access the site.

4.4 The lands upon which the Work is to be performed, rights-of-way for access thereto, and other lands designated for use by Contractor in performing the Work are identified in the Supplemental Conditions, General Requirements or Drawings.

4.5 The submission of a Bid will constitute a representation by the Bidder that he has complied with every requirement of this Article 4 and that the Contract Documents are sufficient in scope and detail to indicate and convey a

6/5/2026 00100-2 INSTRUCTIONS TO BIDDERS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project complete understanding of all terms and conditions for the performance of the Work. Bidder agrees at the time of submitting its Bid that no further examinations, investigations, explorations, tests, studies, or data are necessary for the determination of its Bid for performance of the Work at the price(s) bid and within the times required, and in accordance with the other

terms and conditions of the Bidding Documents.

4.6 Bidders who do not undertake the mandatory site visit will have their Bid rejected and unopened at the scheduled Bid opening. Bidders who do not take advantage of the pre-bid visit must provide prior notification of the visit to the OWNER in order to document their visit.

5. INTERPRETATIONS

5.1 All questions about the meaning or intent of the Contract Documents shall be submitted to OWNER’s Project Manager in writing at least fourteen (14) days prior to bid opening. Questions received later than that date will not be answered. Replies will be issued only by Addenda made available not later than seven (7) days prior to bid opening. Failure of any Bidder to receive such Addendum shall not relieve Bidder from the obligations under the Bid as

submitted. Only questions answered by formal written Addenda will be binding. Oral and other interpretations or clarifications will be without legal effect.

6. BID SECURITY

6.1 Bid Security shall be made payable to OWNER, in an amount of five (5) percent of the Bidder's maximum Bid price and in the form of a certified check, bank cashier's check, or a Bid Bond on form attached, issued by a Surety meeting the requirements of paragraph 6.3.

6.2 The Bid Security of the Lowest Responsible Responsive Bidder will be retained until such Bidder has furnished the required Performance Bond and Payment Bond and executed the Agreement whereupon it will be returned. If the successful Bidder fails to furnish the required Contract Security within 10 days of the Notice of Award or fails to execute and return the Agreement within ten days of the Notice of Award, OWNER may annul Notice of Award or the

Notice of Award and the Bid Security of that Bidder will be forfeited. The Bid Security of the three apparent lowest responsible responsive Bidders may be retained by OWNER until the earlier of the seventh day after the "effective date of the Agreement" (which term is defined in the General Conditions) by OWNER to Contractor or ten days after the time specified for Bids to remain open. Bid Security of other Bidders will be returned within ten days of the Bid

opening.

6.3 All bonds submitted as Bid Security shall be executed by surety companies legally authorized to do business in Maryland. Such surety companies shall also be named in the current list of "Companies Holding Certificates of Authority as Acceptable Sureties on Federal Bonds and as Acceptable

6/5/2026 00100-3 INSTRUCTIONS TO BIDDERS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project Reinsuring Companies" as published in current Circular 570 by the Audit Staff Bureau of Accounts, U.S. Treasury Department. Attorneys-In-Fact who sign Bid Bonds must file with each Bond a certified copy of their Power of Attorney to sign said Bonds, bearing the same date as the Bonds.

7. CONTRACT TIME

7.1 The number of days within which the Work is to be completed (the Contract Time) is set forth in the Agreement. It represents the number of days from the Effective date of Agreement to the date of Approval of the Final Payment.

8. LIQUIDATED DAMAGES

8.1 Provisions for liquidated damages are set forth in the Agreement.

9. SUBSTITUTE MATERIAL AND EQUIPMENT

9.1 The Contract, if awarded, will be on the basis of material, equipment, or specialized subcontractors described in the Drawings or specified in the Specifications without consideration of possible substitute or "or equal" items. Failure to do so, as may be evidenced by the Supplier List in the Bid package, will be cause to find the Bid non-responsive and may be cause for rejection.

9.2 Whenever it is indicated in the Drawings or specified in the Specifications that a substitute or "or equal" item of material or equipment may be furnished or used by Contractor, if acceptable to ENGINEER, application for such acceptance will not be considered by ENGINEER until after the Notice of Intent to Award has been issued. The procedure for submittal of any such application by Contractor and consideration by ENGINEER is set forth in

paragraph 6.7 of the General Conditions and supplemented in the General Requirements in paragraph 1.06.

10. SUBCONTRACTORS, ETC.

10.1 A list of all Subcontractors and other persons and organizations (including those who are to furnish the principal items of material and equipment) proposed for those portions of the Work as to which such identification is so required shall be submitted with the bid and an experience statement is required on demand after the Bids are received with pertinent information as to similar projects and other evidence of qualification for each such

Subcontractor, person and organization if requested by OWNER. Information as to similar projects and other evidence of qualification for each such Subcontractor, person and organization shall be submitted upon request by OWNER. If OWNER or ENGINEER after due investigation has reasonable objection to any proposed Subcontractor, other person or organization, either may, before giving the Notice of Intent to Award, request the apparent Lowest

Responsible Responsive Bidder to submit an acceptable substitute and the Bid Price shall be increased or decreased by the difference in cost occasioned by such substitution. If the apparent Lowest Responsible Responsive Bidder declines to make any such substitution, the contract may not be awarded to

6/5/2026 00100-4 INSTRUCTIONS TO BIDDERS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project such Bidder, but his declining to make any such substitution will not constitute grounds for sacrificing his Bid Security. For any Subcontractor, other person or organization so listed and to whom OWNER or ENGINEER does not make written objection prior to the giving of the Notice of Award it will be deemed the OWNER and ENGINEER have no objection.

10.2 No Contractor shall be required to contract with any Subcontractor, other person or organization against whom he has reasonable objection.

10.3 Prior to execution of final contract documents or during construction, it is the Contractor's responsibility to notify, and seek approval from, the OWNER of any additions or deletions to the required list of Subcontractors.

11. BID FORM

11.1 The Bid Form is included in the Contract Documents.

11.2 Bid Forms must be completed in ink or by typewriter. Where unit prices for estimated quantities appear on the Bid Form, the Bid price of each item on the form must be stated and extended; in case of a conflict, the unit price bid will take precedence and not the totals or extensions.

11.3 Estimates of quantities furnished by the ENGINEER are approximate and have been used as a basis for estimating the cost of Work, and will be used for the purpose of tabulating and comparing Bids and awarding the contract.

The ENGINEER has endeavored to estimate quantities accurately; and to the best of his knowledge the information shown on the drawings is reasonably correct.

11.4 Bids by corporations must be executed in the corporate name by the president or vice-president (or other person having authority to bind the corporation, accompanied by corporate power of attorney) and the corporate seal must be affixed and attested by the secretary or an assistant secretary. The corporate address and state of incorporation shall be shown below the signature.

11.5 Bids by partnerships must be executed in the partnership name and signed by a partner, whose title must appear under the signature and the official address of the partnership must be shown below the signature.

11.6 Bids by Limited Liability Corporations (LLC) must be executed in the LLC name and signed by an authorized member, whose title must appear under the signature and the official address of the LLC must be shown below the signature.

11.7 All names must be typed or printed below the signature.

11.8 The Bid shall contain an acknowledgment of receipt of all Addenda (the numbers and dates of which shall be filled in on the Bid Form).

11.9 The address to which communications regarding the Bids are to be directed must be shown.

12. SUBMISSION OF BIDS

6/5/2026 00100-5 INSTRUCTIONS TO BIDDERS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project 12.1 Bids shall be submitted at the time and place indicated in the Advertisement for Bid and accompanied by the Bid Security and other required documents.

No Bid shall be considered if it arrives after the time set for bid opening. If the bid is sent through the mail or other delivery system the sealed envelope shall be enclosed in a separate envelope with the notation "BID ENCLOSED" on the face thereof.

12.2 Bids shall be submitted on the Bidding Document forms furnished as a separate packet with the Contract Documents. The bid packet consists of the following:

• Bid Form

• Bid Bond

• Bidder's Experience

• Subcontractor and Supplier List

• Certification of Non-segregated Facilities

• Certification of Equal Employment Opportunity

• Non-Collusion Certificate

• Affirmative Action Plan Certification

• Conflict of Interest Disclosure

• Assurances for Compliance with Federal and State Laws &

Regulations (page 00450-6)

• Full M/WBE Submission including the Good Faith Effort

Checklist and all Attachments

13. OPENING OF BIDS

13.1 Bids will be opened publicly and read aloud, and an abstract of the amounts of the base Bids, unit prices, and major alternates (if any) will be made available after the opening of Bids.

14. BIDS TO REMAIN OPEN

14.1 Except as otherwise permitted by law, Bids shall remain irrevocable for the period stated in the Invitation to Bid.

15. AWARD OF CONTRACT

15.1 OWNER reserves the right to reject any and all Bids, to waive any and all informalities and the right to disregard all nonconforming, non-responsive or conditional Bids. Discrepancies between words and figures will be resolved in favor of words. Discrepancies between the indicated sum of any column of figures and the correct sum thereof will be resolved in favor of the correct sum.

15.2 In evaluating Bids, OWNER shall consider the qualifications of the Bidders, whether or not the Bids comply with the prescribed requirements, and unit prices if requested in the Bid Form. The award will be made on the basis of the total bid.

15.3 OWNER may consider the qualifications and experience of Subcontractors

6/5/2026 00100-6 INSTRUCTIONS TO BIDDERS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project and other persons and organizations (including those who are to furnish the principal items of material or equipment) proposed for those portions of the Work as to which the identity of Subcontractors and other persons and organizations must be submitted as provided in the General Conditions.

Operating costs, maintenance considerations, performance data and guarantees of materials and equipment may also be considered by OWNER.

15.4 OWNER may conduct such investigations as he deems necessary to assist in the evaluation of any Bid and to establish the responsibility, qualifications and financial ability of the Bidders, proposed Subcontractors and other persons and organizations to do the Work or furnish equipment in accordance with the Contract Documents to OWNER's satisfaction within the prescribed time.

15.5 If the contract is to be awarded, it will be awarded to the lowest responsible responsive Bidder whose evaluation by OWNER indicates to OWNER that the award will be in the best interests of the Project.

15.6 If the contract is to be awarded, OWNER will give the lowest responsible responsive Bidder a Notice of Award within the time specified for Bids to remain irrevocable.

16. PERFORMANCE AND OTHER BONDS

16.1 Paragraph 5.1 of the General Conditions describes the OWNER's requirements as to Performance and Payment Bonds. The lowest responsible responsive Bidder shall within ten days of the issuance of the Notice of Intent to Award furnish Performance and Payment Bonds each in an amount equal to 100% of the Bid, to the office of the Project Manager unless otherwise specified.

17. INSURANCE

17.1 Paragraph 5.2 through 5.6 of the General Conditions describes the OWNER's requirements as to Insurance. The lowest responsible responsive Bidder shall furnish said proof of insurance as indicated in paragraph 5.7 of the General Conditions.

18. SIGNING OF AGREEMENT

18.1 When OWNER gives a Notice of Award to the lowest responsible responsive Bidder, it will be accompanied by at least four (4) unsigned duplicate original copies of the Agreement and all other Contract Documents. Within ten days thereafter Contractor shall sign and deliver said duplicate original copies of the Agreement to OWNER with all other Contract Documents attached.

Within ten days thereafter, the duplicate original copies will be signed by OWNER. The OWNER, the Contractor, and the ENGINEER will each receive an executed duplicate original copy of the Contract Documents.

19. STATE GRANT REQUIREMENTS

19.1 Attention is called to the MDE funding insert which is identified as Section

6/5/2026 00100-7 INSTRUCTIONS TO BIDDERS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project 00450 of the Project Manual. Bidders will be required to adhere to all applicable provisions, not just those mentioned below. Some issues of note:

19.1.1 Anti-Degradation Implementation Procedures – (refer to page 3 of

Section 00450) –

Note the project is within the drainage basin of Red Lion Branch which is considered a Tier II catchment area. However, via a letter dated October 22, 2025, the project has been granted a waiver for any additional anti-degradation requirements.

19.1.2 Assurance For Compliance With Federal Laws And Regulation – (refer to page 6 of Section 00450) – Bidders are required to submit this form with the bid package.

19.1.3 Minority and Women’s Business Enterprise Participation – (refer to page 9 of Section 00450) - The attention of Bidders is directed to the requirements pertaining to Minority and Women’s Business Enterprises. Participation in strict accordance to the Good Faith Efforts set forth in this insert is essential if to be awarded the bid.

These efforts apply to any subcontractors as well.

Within seven (7) days of the bid opening date, the apparent low bidder must submit full evidence of participation with the DBE program by submitting all documentation as well as the completed forms provided in the State Grant insert. Failure to submit DBE requirements within the specified time limit will be considered non-responsible.

19.1.4 Maryland Prevailing Wage Rates – (refer to page 2 of Section 00450)

– Wage rates will apply to this work with all required documentation

and record keeping provisions as noted in the insert. Note current project specific applicable wage rates are located in Section 00455 of the Project Manual. Contractor must submit these reports directly to the State via the below website. Be advised the State will readily assess the noted “$10 per each calendar day the records are late” penalty. This activity is wholly between the CONTRACTOR and the

State. Neither the OWNER nor the ENGINEER plays any part in this requirement.

https://www.dllr.state.md.us/PrevWage/web/content/Instructi onsToContrsAndSubcontrcrs.aspx

END OF SECTION

6/5/2026 00100-8 INSTRUCTIONS TO BIDDERS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

BID FORM

To: The County Commissioners of Queen Anne's County

1. The undersigned BIDDER proposes and agrees, if this Bid is accepted, to enter into

an Agreement with OWNER in the form included in the Contract Documents to complete all Work as specified or indicated in the Contract Documents for the Contract Price indicated in this Bid within the Contract Time and in accordance with the Contract Documents.

The undersigned BIDDER submits this Bid with the understanding that the OWNER reserves the right to reject any or all bids submitted.

2. BIDDER accepts all of the terms and conditions of the Instructions to Bidders,

including without limitation those dealing with the disposition of Bid Security.

BIDDER will submit the required Performance and Payment Bonds within ten days after the date of OWNER's Notice of Award.

BIDDER will sign the Agreement within ten days after the date of OWNER's Notice of Award.

3. In submitting this Bid, BIDDER represents, as more fully set forth in the Agreement,

that:

(a) BIDDER has examined copies of all the Contract Documents and hereby

acknowledges receipt of the following Addenda and acknowledges the bid reflects the changes created by these addenda:

Number Date

(b) This Bid is genuine and not made in the interest of or on behalf of any

undisclosed person, firm or corporation and is not submitted in conformity with any agreement or rules of any group, association, organization or corporation;

BIDDER has not directly or indirectly induced or solicited or induced any person, firm or a corporation to refrain from bidding; and BIDDER has not sought by collusion to obtain for himself any advantage over any other Bidder or over OWNER; and

6/5/2026 00330-1 BID FORM

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

finances to properly and expeditiously prosecute the Work as bid, and is prepared to present further information to substantiate this statement.

4. BIDDER agrees that the Work will be completed on or before the dates or within the

number of consecutive days indicated in the Agreement.

BIDDER accepts the provisions of the Agreement as to liquidated damages in the event of failure to complete the Work on time.

5. The following documents are attached to and made a condition of this Bid:

(a) Required Bid Security

(b) Bidder's Experience Statement with supporting data.

Documents.

6. Communications concerning this Bid may be forwarded to the address of BIDDER

indicated below.

7. The terms used in this Bid which are defined in the General Conditions of the

Construction Contract included as part of the Contract Documents have the meanings assigned to them in the General Conditions.

8. BIDDER covenants and warrants that he has had sufficient time to examine the site

of the Work; that he has examined the site of the Work; and that he has based the within Contract Prices on his own independent examination and investigation of the site, subsurface materials, and conditions and has not relied on any subsurface information furnished to him by Owner or Engineer. BIDDER has examined the legal requirements (federal, state and local laws, ordinances, rules and regulations) and

the conditions affecting cost, progress or performance of the work and has made such independent investigations as BIDDER deems necessary.

9. BIDDER will complete the Work for the following price(s):

6/5/2026 00330-2 BID FORM

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

BID SCHEDULE

CONTRACT NO. SAN 26-01

ESTIMATED

ITEMS DESCRIPTION QUANTITY UNIT UNIT PRICE EXTENSION

S-1 Mobilization 1 LS $__________

S-2 WWTP Improvements 1 LS $__________

S-3 Biolac Solids Removal S-4a Mobilization/Demobilization 1 LS $__________

S-4b Polymer 5 DRUM $________ $__________

S-4c Solids Removal 10 DAYS $________ $__________

S-4d Basin Mapping 1 LS $__________

S-4 Paving Restoration 10 SY $________ $__________

S-5 Contingent Test Pits 5 CY $________ $__________

S-6 Contingent Concrete 5 CY $________ $__________

S-7 Contingent Backfill 50 CY $________ $__________

S-8 Contingent Excavation 10 CY $________ $__________

S-9 Contingent DI Fittings 1 TON $________ $__________

TOTAL BID (SUM OF ITEMS S-1 THROUGH S-9) $_______________

IN WORDS_____________________________________________________________

SUBMITTED this _____ day of __________________, 2026.

Bidder: _______________

6/5/2026 00330-3 BID FORM

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

A CORPORATION

Corporation Name: ____________________________________________________

State of Incorporation: _____________________________

By: ____________________________/s/ _______________________________

(Person Authorized to Sign) (Title)

(CORPORATE SEAL)

Attest: ________________________/s/ Corporate Secretary Business Address: ___________________________________________________

___________________________________________________

Phone No.: (____) _____________________

A LIMITED LIABILITY COMPANY

LLC Name: ____________________________________________________

State of Organization: _____________________________

By: ____________________________/s/ _______________________________

(Person Authorized to Sign) (Title)

(CORPORATE SEAL)

Attest: ________________________/s/ Corporate Secretary Business Address: ___________________________________________________

___________________________________________________

Phone No.: (____) _____________________

6/5/2026 00330-4 BID FORM

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project

BID BOND

KNOW ALL MEN BY THESE PRESENTS:

THAT _________________________________________________________________

of ______________________________________________________ as Principal, and _______________________________________________ a corporation organized and existing under the laws of the State of Maryland and authorized to do business in the State of Maryland, as Surety, are held and firmly bound unto the County Commissioners of Queen Anne's County, Maryland, as Obliged, in the full and just sum of _____________________________________________ Dollars ($________________),

(written in words) lawful money of the United States of America, for the payment of which sum, well and truly to be made, we bind ourselves, our heirs, executors, administrators, successors and assigns, jointly and severally, firmly by those presents.

WHEREAS, the said Principal is herewith submitting its Bid proposal for the construction of Contract No. SAN 26-01 – Sudlersville Wastewater Treatment Plant ENR Improvement Project”, with a Project Manual dated June 2026.

THE CONDITION OF THIS OBLIGATION is such that if the aforesaid Principal shall be given Notice of Intent to be awarded the Contract, the said Principal will, within the time required, give good and sufficient Bonds to secure the performance of the terms and conditions of the Contract and enter into an Agreement, then this obligation to be void; otherwise, the Principal and Surety will pay unto the Obliged the full amount of this Bid Security.

Signed, Sealed and Delivered this _____ day of ____________, 20__.

Attest:

PRINCIPAL

___________________________/s/ By: ________________________/s/ Secretary President/Owner

(SEAL)

SURETY

___________________________/s/ By: ________________________/s/ Witness Attorney-in-fact

(SEAL)

06/05/26 00410-1 BID BOND

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project

NOTES:

Attach an appropriate Power of Attorney, dated as of the same date as the bond, evidencing the authority of the Attorney-in-Fact to act on behalf of the corporation.

If the Contractor is a Partnership, all partners shall execute the bond.

Surety companies executing bonds must appear on the U.S. Department of the Treasure most current Bond List (Circular 570 as amended). Bond amounts are subject to the underwriting limitation listed in the most recent Circular 570.

06/05/26 00410-2 BID BOND

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project

BIDDER'S EXPERIENCE

The following is a list of the projects similar in character and scope to the Work specified under this Contract which have been successfully completed by this Bidder during the past ten years.

This information must be furnished by each Bidder. The term "Complete" means accepted and final payment received from the Owner or authorized representative.

Location & Owner's Date Contract Type of Work Name & Address Engineer Completed Price

1. __________________________________________________________________________

____________________________________________________________________________

2. __________________________________________________________________________

____________________________________________________________________________

3. __________________________________________________________________________

____________________________________________________________________________

4. __________________________________________________________________________

____________________________________________________________________________

Bank Reference: ____________________________________________

____________________________________________

If the apparent low bidder, I hereby agree to furnish to the Owner a complete and current financial statement upon request.

_______________________________/s/ ___________________________

Bidder's Signature Date

06/05/26 00415-1 BIDDER’S EXPERIENCE

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project

SUBCONTRACTOR LIST

Bidder proposes to utilize the following subcontractor on this project (indicate ‘Self’ if work is to be done by Bidder):

Concrete Tankage Name: _________________________________

Address: _________________________________

Yard Piping Name: _________________________________

Address: _________________________________

Electrician Name: _________________________________

Address: _________________________________

Controls & Telemetry Name: _________________________________

Address: _________________________________

Bio-Lac Basin Cleaning Name: _________________________________

Address: _________________________________

Other (Identify) Name: _________________________________

Address: _________________________________

_______________________________________ ____________________

Bidder's Signature Date

06/05/26 00417-1 SUBCONTRACTOR LIST

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project

SUPPLIER LIST

Bidder proposes to use equipment supplied by the following manufacturers for this project:

Chemical Feed Pumps Name: _________________________________

Address: _________________________________

PAR Mixers Name: _________________________________

Address: _________________________________

Curb Stop Valves Name: _________________________________

Address: _________________________________

Air Release Valves Name: _________________________________

Address: _________________________________

Other (Identify) ________ Name: _________________________________

Address: _________________________________

Other (Identify) ________ Name: _________________________________

Address: _________________________________

_______________________________________ ____________________

Bidder's Signature Date

06/05/26 00417-2 SUBCONTRACTOR &

SUPPLIER LIST

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project

CERTIFICATION OF NONSEGREGATED FACILITIES

By submission of this Bid, the Bidder certifies that he does not maintain or provide for his employees any segregated facilities at any of his establishments, and that he does not permit his employees to perform their services at any location, under his control, where segregated facilities are maintained. The Bidder further certifies that he will not maintain or provide for his employees any segregated facilities at any of his establishments, and that he will not permit

his employees to perform their services at any location, under his control, where segregated facilities are maintained. The Bidder agrees that a breach of this certification is a violation of the Equal Opportunity clause in any contract resulting from acceptance of this bid.

As used in this certification, the term "segregated facilities" means any waiting rooms, work areas, rest rooms and washrooms, restaurants and other eating areas, time clocks, locker rooms and other storage or dressing areas, parking lots, drinking fountains, recreation or entertainment areas, transportation, and housing facilities provided for employees which are segregated by explicit directive or are in fact segregated on the basis of race, creed, color, or

national origin because of habit, local custom, or otherwise.

The Bidder further agrees that (except where he has obtained identical certifications from proposed Subcontractors for specific time periods) he will obtain identical certifications from proposed Subcontractors prior to the award of subcontracts exceeding $10,000 which are not exempt from the provision of the Equal Opportunity clause, and that he will retain such certifications in his files.

NOTE: The penalty for making false statements in offers is prescribed in 18 U.S.C. 1001 Date: _______________________ ______________________________

(Signature) ______________________________

(Typed Name & Title of Signer) Company Name and Address: ___________________________________

___________________________________

06/05/26 00418-1 CERTIFICATION OF

NON-SEGREGATED FACILITIES

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project

CERTIFICATION OF

EQUAL EMPLOYMENT OPPORTUNITY

This certification is required pursuant to Executive Order 11246 (30 CFR 12319-25). The implementing rules and regulations provide that any Bidder or prospective Contractor, and any of their proposed Subcontractors, shall state as an initial part of the Bid or negotiations of the contract whether it has participated in any previous contract or subcontract subject to the Equal Opportunity clause - and, if so, whether it has filed all compliance reports due under

applicable instructions.

Where the certification indicates that the Bidder has not filed a compliance report due under applicable instructions, such bidder shall be required to submit a compliance report within seven calendar days after bid opening. No contract shall be awarded unless such report is submitted.

CERTIFICATION BY BIDDER

1. The Bidder has participated in a previous contract or subcontract subject to Executive

Order 11246 regarding Equal Employment Opportunity or a proceeding similar Executive Order.

Yes _____ No _____

2. If the Bidder has participated in such a contract or subcontract, he has filed all

compliance reports that were required to be filed in connection with such contract or subcontract.

Yes _____ No _____

3. The Bidder has previously had contracts subject to the written affirmative action

program requirements of the Secretary of Labor.

Yes _____ No _____

4. If the Bidder has participated in a contract or subcontract, he has developed and

placed on file at each establishment affirmative action programs as required by the rules and regulations of the Secretary of Labor.

Yes _____ No _____

(If the answer to item 2 or item 3 is "No", attach a detailed explanation to this certification.) I hereby certify that the information given herein is true and complete to the best of my knowledge and belief.

I understand that, if I have failed to file any compliance reports that have been required, I am

06/05/26 00419-1 CERTIFICATION OF EQUAL

EMPLOYMENT OPPORTUNITY

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project not eligible and will not be eligible to have my bid considered or to enter into the proposed contract unless and until I make an arrangement regarding such reports that is satisfactory to the office where the reports are to be filed.

________________________________ ______________________________

Typed Name Title ________________________________ ______________________________

Signature Date Business Name and Address: ___________________________________

___________________________________

06/05/26 00419-2 CERTIFICATION OF EQUAL

EMPLOYMENT OPPORTUNITY

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project

NON-COLLUSION CERTIFICATION

Bidder's Name: _________________________________________________

Address: ______________________________________________________

This is to certify that neither the above named Bidder nor any of its officers, partners, owners, agents, representatives, employees, or parties in interest have in any way colluded, conspired, connived or agreed, directly or indirectly, with any other Bidder, firm, or person to submit collusive or sham Bid in connection with the Contract for which the attached Bid has been submitted or to refrain from bidding in connection with such Contract, or are in any

manner, directly or indirectly, sought by agreement or collusion or communication or conference with any other Bidder, firm, or person to fix the price or prices in the attached Bid or of any other Bidder or to fix any overhead, profit, or cost element of the collusion, conspiracy, connivance or unlawful agreement for any advantage against the Owner or any person interested in the proposed Contract: and the price or prices quoted in the attached Bid

are fair and proper and are not tainted by any collusion, conspiracy, connivance or unlawful agreement on the part of the Bidder or any of its agents, representatives, owners, employees, or parties in interest.

Signed _________________________________

_________________________________

Title _________________________________

Date SEAL - If Bidder is a Corporation Attest: _________________________________

Secretary

06/05/26 00420-1 NON-COLLUSION

CERTIFICATION

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project

AFFIRMATIVE ACTION PLAN CERTIFICATION

By submission of this bid, bidder certifies that to the greatest extent feasible, his hiring and training practices will be in compliance with the HUD 4010 Labor Provisions and Section 3 of HUD Act of 1968 such that:

a) to the greatest extent feasible, opportunities for the training and employment be

given to lower income residents of the project area and contracts for work be awarded to business concerns in the project area,

b) attempt to recruit from the project area through local advertisement media, signs

placed on the project site, and community organizations,

c) maintain a list of lower income people if readily available and offer employment

to them if qualified and if a vacancy exists.

Date: _____________________ __________________________________

(Signature) __________________________________

(Typed Name of Signer) __________________________________

(Title of Signer) Company name and address:

__________________________________

06/05/26 00421-1 AFFIRMATIVE ACTION

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project

CONFLICT OF INTEREST DISCLOSURE & EMPLOYMENT OF ALIENS STATEMENT

In connection with the undersigned's participation in the bid process or request for proposals being considered by the County Commissioners of Queen Anne's County ("the County") the undersigned does affirm under the penalties of perjury as follows:

I have reviewed the materials provided by the County in connection with my proposed bid or proposal and reviewed such records of my company and business as necessary to make the following statements:

(Check all appropriate boxes) To the best of my knowledge and belief, neither I, the company identified below, nor any employee of the company have been involved or are presently involved in any situations or actions that might be regarded as an actual or potential conflict of interest in the event of a successful bid or award.

It appears that I, the company identified below or an employee of the company have been involved in some situations or actions that might be regarded as a potential conflict of interest should I submit the successful bid or proposal. Details of such situations and/or actions are as follows (attach additional sheets as necessary):

1. ___________________________________________________

2. ___________________________________________________

The following situations or actions in which I, my company or an employee of the company are presently involved might be regarded as a potential conflict of interest if I submit the successful bid or proposal (attach additional sheets as necessary):

1. ___________________________________________________

2. ___________________________________________________

I have attached a list of all present contracts between the company named below and the County.

Furthermore, vendors providing goods or services to Queen Anne’s County Government, as a condition of doing business with the County, are required to comply with all applicable laws and regulations relating to the employment of aliens.

Should vendors providing goods or services to Queen Anne’s County fail to comply with applicable laws and regulations relating to the employment of aliens, such failure shall constitute a material breach of the vendor’s contractual relationship with Queen Anne’s County and the County may take

06/05/26 00422-1 CONFLICT OF INTEREST

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project all reasonable steps to terminate the County’s contractual relationship with the vendor. If you have questions, please consult the County Department that manages your vendor contract.

Signature: ______________________________________ Date: _________________

Name: (please print) ____________________________________________________

Company/Organization: ____________________________________________

06/05/26 00422-2 CONFLICT OF INTEREST

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project

CONFLICT OF INTEREST DISCLOSURE & EMPLOYMENT OF ALIENS STATEMENT

I have reviewed the materials provided by the County in connection with my proposed bid or proposal and reviewed such records of my company and business as necessary to make the following statements:

1. ___________________________________________________

2. ___________________________________________________

1. ___________________________________________________

2. ___________________________________________________

I have attached a list of all present contracts between the company named below and the County.

06/05/26 00422-1 CONFLICT OF INTEREST

QUEEN ANNE'S COUNTY, MD

Signature: ______________________________________ Date: _________________

Name: (please print) ____________________________________________________

Company/Organization: ____________________________________________

06/05/26 00422-2 CONFLICT OF INTEREST

January 2026

REQUIREMENTS AND CONTRACT PROVISIONS FOR THE PROJECT

FINANCED BY THE STATE GRANTS THROUGH

MARYLAND DEPARTMENT OF THE ENVIRONMENT

The project or segment thereof to be constructed in accordance with these contract documents is subject to the following requirements. In the event of conflict with other requirements of the contract documents, the following requirements control unless the requirement is a minimum requirement. Nothing in this document shall be construed to prohibit the owner from requiring additional assurances, guarantees, indemnities, or other

contractual requirements from any other party to this agreement.

I. ASSURANCES FOR COMPLIANCE WITH THE FOLLOWING FEDERAL

AND STATE LAWS AND REGULATIONS:

1. NON-DISCRIMINATION IN EMPLOYMENT

2. DEBARMENT

3. ANTI-KICKBACK

4. CONTRACT WORK HOURS AND SAFETY STANDARDS

5. PREVAILING WAGE RATES FOR STATE-FUNDED

CONSTRUCTION PROJECTS

6. MARYLAND ANTIDEGRADATION IMPLEMENTATION

PROCEDURES

II. THE PROJECT SIGN

III. UTILIZATION OF MINORITY AND WOMEN’S BUSINESS

ENTERPRISES

(Performance of the good faith steps are required, regardless of M/WBE goal achievement. All information is to be submitted to the owner, prior to the owner’s award of the contract, UNLESS OTHERWISE DIRECTED BY THE OWNER).

1 January 2026

I. ASSURANCES FOR COMPLIANCE WITH THE FOLLOWING FEDERAL AND STATE LAWS

AND REGULATIONS:

The contractor is required to comply with the Federal laws and regulations in regard to nondiscrimination in employment, debarment, anti-kickback, and contract work hours and safety standards as delineated below.

1. Non-discrimination in Employment:

The contractor is required to comply with Executive Order 11246 of September 24, 1965 entitled “Equal Employment Opportunity” as amended by Executive Order 11375 of October 13, 1967.

The contract for the work under this proposal will obligate the prime contractor and its subcontractors not to discriminate in employment practices.

The contractor shall not maintain or provide for his/her employees the facilities, which are segregated on a basis of race, creed, color, or national origin, whether such facilities are segregated by directive or on a de facto basis.

The contractor must, if requested, submit a compliance report concerning their employment practices and policies in order to maintain his/her eligibility to receive the award of the contract.

The contractor must be prepared to comply in all respects with the Contract Provisions regarding non-discrimination, as stipulated under the Labor Standards.

2. Debarment:

Under Executive Order 12549, an individual or organization debarred from participation in Federal assistance or benefit programs may not receive any assistance award under a Federal program, or a sub-agreement thereunder for $25,000 or more.

Therefore, the bidder as an individual or as an organization, presently debarred, suspended, proposed for debarment, will be declared ineligible to participate in bidding the proposed contract as a prospective recipient of financial assistance from the Maryland Department of the Environment.

The contractor shall not enter into any sub-contract with any individual, firm or organization debarred from Government contracts pursuant to Executive Order 11246.

3. Anti-kickback:

The contractor and/or its sub-contractors shall comply with the Copeland “Anti-Kickback” Act (18 U.S.C. 874). Any evident illicit kickback practice in any shapes or forms will cause termination of the contract.

4. Contract Work Hours and Safety Standards:

The contractor and/or its sub-contractors shall comply with Sections 103 and 107 of the Contract Work Hours and Safety Standards Act (40 U.S.C. 327-330).

5. Prevailing Wage Rates for State-Funded Construction Projects:

The Prevailing Wage Law regulates the hours of labor, rates of pay, conditions of employment, obligations of employers, and the powers and duties of certain public officials under contracts and subcontracts for public works in Maryland. Coverage extends to any construction 2 January 2026 contract for public works with a value of at least $250,000 that is funded with at least 25% State funds.

Wage Determinations:

A wage determination issued for a project specifies the wage and fringe benefit rates for each classification of worker, determined to prevailing in that locality for that type of construction.

Wage Determinations are issued for each locality in the State (23 counties and Baltimore City) and are in effect for one year from the date on which they become final. The law requires employees on a public works contract to be paid overtime for hours in excess of 10 hours in a single day, and for work performed on a Sunday or a legal holiday.

Under Payments:

Contractors found to be paying wages below the prevailing wage rate may be fined $20 per day for each worker paid less than the established rate. Note: The maximum allowable ratio is one journeyman to one apprentice. All apprentices must be registered with the Maryland Apprenticeship and Training Program without exception.

Certified Payroll Statements:

Contractors on State funded construction projects covered by the Prevailing Wage Law are required to submit certified payroll statements indicating proper worker classification and wage for both straight time and overtime work. Certified payrolls must be submitted to the Commissioner of Labor and Industry within 14 days after the end of the payroll period.

Penalties for late submission of payrolls total $10 for each calendar day the records are late.

Additional Information:

Division of Labor and Industry Prevailing Wage Unit 1100 North Eutaw Street, Room 607 Baltimore, Maryland 21201 (410) 767-2342 Fax: (410) 333-7303 E-Mail Address: prevailingwage@dllr.state.md.us Website: http://www.dllr.maryland.gov/labor/prev/

6. Maryland Antidegradation Implementation Procedures:

The Clean Water Act requires three components to water quality standards that set goals for and protect each States’ waters. The three components are: (1) designated uses that set goals for each water body (e.g., recreational use), (2) criteria that set the minimum conditions to support the use (e.g., bacterial concentrations below certain concentrations) and (3) an antidegradation policy that maintains high quality waters so they are not allowed

to degrade to meet only the minimum standards. The designated uses and criteria set the minimum standards for Tier I.

Maryland’s antidegradation policy has been promulgated in three regulations: COMAR 26.08.02.04 sets out the policy itself, COMAR 26.08.02.04-1, provides for identification and implementation of Tier II (high quality waters) of the antidegradation policy, and COMAR 26.08.02.04-2 that describes Tier III (Outstanding National Resource Waters or ONRW), the highest quality waters. No Tier III waters have been designated at this time. Any capital

funding project occurring within Tier II catchment areas, which are areas that drain to Maryland’s high quality designated Tier II stream segments, must undergo Antidegradation Review.

To determine if your project is located within Tier II catchment area, please contact Ms.

Angel Valdez of MDE Environmental Standards and Assessment Program, at (410) 537- 3606, or at angel.valdez@maryland.gov.

3 January 2026 Please be aware that projects subject to an Antidegradation or Tier II review must adequately address comments that arise during the review before funding can be granted.

How Tier II Stream Segments are Designated

• Currently high quality stream segments are designated for the characteristic of

biology using Maryland Biological Stream Survey (or comparable) data

• Streams are recorded in Table O (COMAR 26.08.02.04-1) and the pending list of

streams awaiting promulgation or corrections is maintained on the MDE website.

The Basic Antidegradation Review Process Many of the projects funded by the Water Infrastructure Financing Administration (WIFA) at MDE result in a net improvement to water quality. As a result, the antidegradation review process for WIFA generally involves making sure that any land disturbance activities associated with the project includes additional controls. Any other antidegradation reviews specific to project discharges (e.g. end-of-pipe) will be addressed separately through the

permitting process.

To help expedite the review process the following list of practices has been provided. These practices include “accelerated stabilization, redundant controls, increased riparian buffers, passive or active chemical treatment, or a reduction in the size of the grading unit” as stated in the 2011 Maryland Standards and Specifications for Soil Erosion and Sediment Control to address Tier II issues. All practices implemented should be evident in plans. When using

the list below to aide in planning keep in mind that application and site specifics will ultimately determine each recommendation’s applicability. Also realize that this list is not exhaustive and additional practices may be identified as specific plans become available.

• Initial Considerations: including limiting vegetative disturbances, phasing and/or

sequencing, accelerated stabilization, minimum weekly inspections, and timing of instream work to low flow periods or clear weather forecasts

• Expanded Riparian Buffers (for new structures/expansions only): from 100 to 230

feet, depending upon slope and soil composition, on all intermittent and perennial streams within project footprint to help further address direct hydrologic impacts to surface waters. See Table 1 for more details.

Table 1 Adjusted Average Optimal Buffer Width Key for HQ Waters (minimum width 100 feet) Slopes (%) Hydrologic Soil Group 0-5% 5-15% 15-25% >25% Ab 100 130 160 190

C 120 150 180 210

D 140 170 200 230

• Streamside Management Zones (buffer areas for utility projects): where

disturbance and work cannot be avoided, utilize minimally disturbing & selective vegetative clearing methods, restorative planting (not seeding) for major nearstream clearings totaling 1 acre or more, no mulch placement within the streamside management zones, if possible allow small shrub growth

• Enhanced Buffer Management: including sheetflow of discharge beyond the

minimum 100 foot vegetative buffer or implementing redundant mechanisms in dewatering exercises such as devices in manifold, use of chemical filtration aides, 4 January 2026 combining two practices such as filter bags with vegetated buffers and silt fencing.

Also incorporation of super silt fencing or an equivalent practice when working near streams.

• Enhanced Temporary Access Waterways Crossings: including utilizing horizontal

directional drilling/jack and bore for all major stream crossings or sensitive crossings, including a frac-out plan; preferential use of partial diversions (where possible); and utilization of temporary access bridges over fords.

• Special Concern- pH and Water Quality: For all activities related to in-stream

grout placement, either in bags or as fill:

1. To prevent impacts to in-stream pH, such operations should occur “in-the-dry”.

2. An emergency treatment plan should be in place to address accidental material

releases.

3. Cure time allotted should reflect chemically stable grout material and should

also represent the most conservative time in the expected cure range.

4. The water quality standard numeric criteria for pH must be met in the ‘first

flush’ before diversion is removed.

• Stormwater Management: follow the current guidelines within the Maryland

Stormwater Design Manual (2009 Revised), including ESD to the MEP or other non-structural practices Within seven (7) days of the bid opening, the apparent low bidder shall sign the form as given in Attachment I, Assurances for Compliance with Federal and State Laws and Regulations pertaining to non-discrimination in employment, debarment, anti-kickback, contract work hours and safety, prevailing wage rates, and Maryland

Antidegradation Implementation Procedures.

5 January 2026

ASSURANCES FOR COMPLIANCE WITH FEDERAL AND STATE LAWS AND

REGULATIONS

The contractor is required to comply with the following Federal and State laws and regulations:

1. Non-discrimination in Employment in accordance with Executive Order 11246 of

September 24, 1965 entitled “Equal Employment Opportunity” as amended by Executive Order 11375 of October 13, 1967.

2. Debarment in accordance with the Executive Order 12549 and Executive Order

11246

3. Anti-kickback in accordance with the Copeland “Anti-Kickback” Act (18 U.S.C. 874)

4. Contract Work Hours and Safety Standards in accordance with Sections 103 and 107

of the Contract Work Hours and Safety Standards Act (40 U.S.C. 327-330)

5. Prevailing Wage Rates for State-Funded Construction Projects.

Determination Number: _______________________

Date Issued: _________________

Note: Wage rates remain in effect for one year from the date they were issued. If construction does not start within one year of issuance, a new wage rate determination would be required.

6. Maryland Antidegradation Implementation Procedures as promulgated in three

regulations: COMAR 26.08.02.04 sets out the policy itself, COMAR 26.08.02.04-1, provides for identification and implementation of Tier II (high quality waters) of the antidegradation policy, and COMAR 26.08.02.04-2 that describes Tier III (Outstanding National Resource Waters or ONRW), the highest quality waters. No Tier III waters have been designated at this time.

I do solemnly declare and affirm that I am obligated to comply with the above Federal and State laws and regulations. It is understood that non-compliance with any one of the above Federal or State laws and regulations will be the sufficient reason to cause termination of the contract.

________________________________ ________________

Signature of Prime Contractor Date ________________________________

Print Name and Title 6

THE CONSTRUCTION SITE SIGN FOR PROJECTS FINANCIALLY

SUPPORTED BY STATE GRANT FUND SOURCES

White Background Light Blue Scroll Black Letters

PROJECT TITLE

Project Type (by MDE)

A PROJECT FINANCIALLY SUPPORTED BY THE

UNDER THE DIRECTION APPROVED BY THE

OF THE MARYLAND BOARD

4’ MARYLAND DEPARTMENT OF

OF THE PUBLIC WORKS

ENVIRONMENT

Wes Moore, Governor Brooke E. Lierman, Comptroller Dereck E. Davis, Treasurer Total Project Cost: ________

State Loan: ________

State Grant: ________

Federal Funds: ________

Other Funds: ________

Local Funds: ________

8’ January 2026

PROJECT SIGN

Project Type:

Insert the selected item under the project title:

___ Green Infrastructure Project - Constructing environmentally beneficial “green” infrastructure ___ Wetlands - Creating wetlands to improve water quality and create wildlife habitat ___ Stream restoration - Restoring streams to improve water quality and create wildlife habitat ___ Living shorelines - Turning shorelines into living habitats to improve water quality and to reduce erosion and flooding

___ Septic connections - Connecting homes to public sewer to eliminate failing septic systems, improve water quality, and protect public health ___ Drinking water extension - Connecting homes to public water supply to improve drinking water quality ___ Stormwater project - Reducing stormwater runoff to improve water quality, protect public health, and reduce flooding ___ CSOs, Sewer project - Preventing sewer overflows to improve water quality and protect public

health ___ ENR - Reducing pollution to improve Maryland waterways and the Chesapeake Bay and to protect public health 8 January 2026

MARYLAND DEPARTMENT OF THE ENVIRONMENT

STATE GRANT CAPITAL PROGRAMS

MINORITY AND WOMEN’s BUSINESS ENTERPRISES PARTICIPATION These Minority and Women’s Business Enterprises (M/WBE’s) requirements are applicable to a project or segment thereof to be constructed in accordance with these contract documents that may be funded, in part, by State grant funds provided through the Maryland Department of the Environment under the following capital programs:

1. Bay Restoration Fund (any grant amount)

2. Water Pollution Control Fund (State Grant of more than $500,000)

3. Water Supply Financial Assistance Fund (State Grant of more than $500,000)

As part of our mission, fostering economic growth and opportunities for all Marylanders, grant recipients and sub-recipients (i.e. prime construction contractors, A/E services vendors) are required to make goodfaith efforts to utilize M/WBE’s to participate in state grant-funded contracts. Please note that A/E service consultants who receive grant funds are also considered as prime contractors and must comply with

M/WBE requirements. The attached guidance and forms are to assist recipients and sub-recipients in reaching out to M/WBEs when procuring contracts for the project.

The Grant Recipients and Prime Contractors/Consultants must complete the following attached forms below:

•• M/WBE Participation – Good Faith Effort Checklist (page 12)

• Solicitation Summary and Results Attachment A (page 13)

The Grant Recipients and Prime Contractors/Consultants must return completed forms along with the bid package prior to contract award, to the address below:

Maryland Water Infrastructure Financing Administration Maryland Department of the Environment 1800 Washington Boulevard, Suite 515 Baltimore, MD 21230-1718 Attn: DBE Coordinator, MWIFA Phone: 410-537-3146, Fax: 410-537-3968 9 January 2026

MARYLAND DEPARTMENT OF ENVIRONMENT

SSTTAATTEE GGRRAANNTT CCAAPPIITTAALL PPRROOGGRRAAMMSS

MMiinnoorriittyy aanndd WWoommeenn’’ss BBuussiinneessss EEnntteerrpprriisseess ((MM//WWBBEE)) GGuuiiddaannccee ffoorr GGrraanntt RReecciippiieennttss && PPrriimmee CCoonnttrraaccttoorrss The Maryland Department of the Environment’s mission is to protect and restore the quality of Maryland’s air, water, and land resources, while fostering smart growth, economic development, safe communities, and quality environmental education, for the benefit of the environment, public health, and

future generations. As a part of our mission, fostering economic growth and opportunities for all Marylanders, all grant recipients and sub-recipients (i.e., prime construction contractors, A/E services vendors) are REQUIRED to make good-faith efforts to utilize Minority and Women’s Business Enterprises (M/WBEs) to participate in state grant contracts. MDE requires grant recipients and sub-recipients to

adhere to the terms and conditions in Appendix A.

The attached guidance is intended for both Recipients and Prime (Construction & A/E) Contractors (sub-recipients) to undertake certain good-faith efforts to provide opportunities for M/WBE firms to participate in contracts financed with State grants. Grant Recipients and Prime Contractors are also required to meet local requirements. The attached forms are REQUIRED to be used to guide and report the good

faith efforts undertaken and M/WBE participation outcomes achieved, if applicable.

M/WBE Good-Faith Efforts: The following good-faith efforts apply to all procurement contracts involving state grant funds:

Step 1: Placing qualified minority business enterprises (MBEs) and women’s business enterprises (WBEs) on solicitation list.

Step 2: Assuring that MBEs and WBEs are solicited whenever they are potential sources.

Step 3: Dividing total requirements, when economically feasible, into small tasks or quantities, to permit maximum participation of MBEs and WBEs.

Step 4: Establishing delivery schedules, where the requirement permits, which encourage participation by MBEs and WBEs.

Step 5: Using the services and assistance of the Maryland Department of Social and Economic Mobility (DOSEM). DOSEM is designated as the primary agency within Maryland for listing and certifying MBEs.

Step 6: Recipients must require the prime contractor, if subcontracts are to be let, to apply the good faith efforts listed above (1-5).

Please submit all information to:

DBE Coordinator, MWIFA 1800 Washington Blvd., Baltimore MD 21230 Phone: 410-537-3146, Fax: 410-537-3968 https://mde.maryland.gov/programs/water/WQFA/Pages/mwbe.aspx 10 January 2026

MARYLAND DEPARTMENT OF THE ENVIRONMENT

SSTTAATTEE GGRRAANNTT CCAAPPIITTAALL PPRROOGGRRAAMMSS

MMiinnoorriittyy aanndd WWoommeenn’’ss BBuussiinneessss EEnntteerrpprriisseess ((MM//WWBBEE)) GGuuiiddaannccee ffoorr GGrraanntt RReecciippiieennttss && SSuubb--RReecciippiieennttss Good Faith Efforts A. Recipients and sub - recipients are required to undertake steps 1 and 5, to develop lists of qualified M/WBE firms that can bid as sub-contractors.

In developing a list of qualified M/WBE firms for participation as sub-contractors in construction, equipment, services, and supplies, Contractors are required to contact and gather information from different resources such as:

• Maryland Department of Social and Economic Mobility (DOSEM)

• Loan Recipient/Project Owner

• Maryland Department of the Environment (MDE)

The M/WBE vendor lists may be classified with Standard Industrial Classification (SIC) or NAICS codes to facilitate solicitation of sub-contractors for specific tasks.

B. Recipients and Prime contractors are required to undertake steps 3 and 4 to assure that qualified M/WBE firms have opportunities as contractors in construction, equipment, services and supplies being procured under the prime contract.

To provide procurement opportunities to M/WBE firms, the Recipient and Prime Contractor are required to undertake the following:

• Determine if the prime contract can be broken down into smaller categories for purposes of subcontracting or entering into joint ventures.

• For prime contract broken down into smaller components (e.g., painting, roofing, excavation, pipe

laying, etc,) ensure that the delivery schedules are reasonable.

• Invite M/WBE firms, where appropriate, to meetings, conferences, etc. to inform them of subcontract procurement opportunities.

• The Grant Recipient should require the prime contractor to submit all the required M/WBE

information with the bid proposal.

C. Recipients and Prime contractors are required to undertake affirmative Step 2, to assure qualified M/WBE firms have opportunities to bid on the project procurement (in construction, equipment, services, and supplies).

Use the list developed in Item A (above) to solicit proposals from M/WBE firms to work as contractors. In addition, you may contact the resources listed below for posting your bid opportunities.

1. Maryland Department of Social and Economic Mobility:

https://economicmobility.maryland.gov/Pages/default.aspx

2. Governor’s Office of Minority Affairs: http://www.oma.state.md.us/

3. EMaryland Marketplace’s website: https://www.emarylandmarketplace.com

4. U. S. Small Business Administration’s subnet: https://www.sba.gov/offices/district/md/baltimore

5. U.S. Dept. of Commerce Minority Business Development Agency: http://www.mbda.gov

6. U.S. Women’s Chamber of Commerce’s Opportunity Center: http://www.uswcc.org

7. Maryland Washington Minority Companies Association: http://www.mwmca.org

11 January 2026

MARYLAND DEPARTMENT OF THE ENVIRONMENT

1800 Washington Boulevard Suite 515 Baltimore MD 21230-1718 410-537-3146 or 1-800-633-6101 https://mde.maryland.gov/programs/water/WQFA/Pages/mission_statement.aspx MM//WWBBEE PPaarrttiicciippaattiioonn -- GGoooodd FFaaiitthh EEffffoorrttss CChheecckklliisstt PPlleeaassee CChheecckk:: SSttaattee GGrraanntt RReecciippiieennttss  OORR PPrriimmee ((CCoonnssttrruuccttiioonn && AA//EE)) CCoonnttrraaccttoorrss 

Project Name:

Procurement Category: Check box for all M/WBE procurement categories being reported under the above referenced project.

Construction  Equipment  Services  Supplies  For each procurement action, Grant Recipient & Prime Contractor must each complete separate checklists) A: Develop Bidders List of DBE firms (Grant Recipient & Prime Contractor) A1 Did you develop a Bidders List of M/WBE firms? Yes  No  A2 Did you advertise via eMMA, minority, local/regional papers or Dodge Yes  No  Report?

A3 Did you send invitation for bids to M/WBE trade associations? Yes  No  A4 Did you contact US-SBA/MBDA/MDOSEM? Yes  No  A5 Did you provide Prime Contractors with Bidders List? Yes  No  A6 Did you provide MDE with Bidders List? Yes  No  B: Smaller work components and delivery schedules (Grant Recipient & Prime Contractor must complete) B1 Did M/WBE firms have opportunity to bid as prime contractors? Yes  No 

B2 Did you break down the project, where economically feasible, into smaller components?

For M/WBE firms to bid as prime contactor Yes  No  o For M/WBE firms to bid as subcontactors Yes  No  o B3 Do project components have reasonable delivery schedules? Yes  No  B4 Did you encourage M/WBEs to bid as consortium due to project size? Yes  No  B5 Is M/WBE a “responsiveness” criteria in bid documents? Yes  No  C: Solicitation Summary of DBE firms (Grant Recipient & Prime Contractor must complete – Use Attachment A for each

contract) C1 Did you use the Bidders List to solicit prime or subcontractors? Yes  No  C2 Did M/WBE firms bid as prime or subcontractors? Yes  No  C3 Is the prime contractor using any subcontractors? Yes  No  D: Require prime contractor to Undertake Good Faith Efforts (Grant Recipient only must complete) D1 Did you include the “MDE Grant Insert” in the bidding documents? Yes  No  D2 Did you require the prime contractors to apply the good faith efforts? Yes  No 

D3 Did you select any M/WBE firms as prime contractor? Yes  No  Supporting Documentation In support of the actions taken in items A, B, C and D (above), all grant recipients and prime contractors must submit with bid proposal Attachment A and attach this checklist along with supporting documentation for “Yes” answers and an explanation for “No” answers. Examples of supporting documentation include: (i) Bidders List of M/WBE firms; (ii) list of sub-contract work

elements possible under the prime contract; (iii) proof of contact with DBE firms as potential prime contractors (copies of invitations for bids/RFP, contact letters, faxes and telephone call sheets, etc.; (iv) copies of all procurement advertisements; and, (v) list of all prime contractors that submitted bids/RFP.

__________________________________ ________________________________

Grant Recipient Name and Title OR Prime Contractor Name and Title Contact Phone # ______________________ Signature/ Date: ______________________

12 January 2026 AAttttaacchhmmeenntt AA

MARYLAND DEPARTMENT OF THE ENVIRONMENT

SOLICITATION SUMMARY AND RESULTS

SSttaattee GGrraanntt RReecciippiieennttss aanndd PPrriimmee ((CCoonnssttrruuccttiioonn && AA//EE)) CCoonnttrraaccttoorrss CCoommpplleettee oonnee ffoorrmm ffoorr eeaacchh pprriimmee ccoonnttrraacctt oorr eeaacchh ssuubbccoonnttrraacctt Project Name:

Total Contract Amount: ________________

Please answer the following questions for each prime contract or each subcontract Procurement Category: Check only one procurement category for each contract being reported under the above referenced project. Construction  Equipment  Services  Supplies  Summary of Subcontractors Solicited (Grant Recipient & Prime Contractor must each complete separate forms) 1 Number of firms solicited (attach documentation): ____________

2 Number of M/WBE firms that responded (attach documentation): ____________

Details of Selected Firm (one form for selected prime and separate forms for each selected subcontractor) 3 Name of Firm:

4 Address:

5 Contact Person (Name and Phone):

6 Total amount of contract $ 7 Type of contract Work:

Type of Work Cost Type of Work Cost $ $ $ $ 8 Is the firm a Minority Business Enterprise? (MBE) Yes  No  9 Is the firm a Women’s Business Enterprise? (WBE) Yes  No  10 If response to question 8 or 9 is yes, please complete the following:

M/WBE Certification Number: _____________________

Certification Date: _____________________

Expiration Date (if applicable): _____________________

Certifying Agency: _____________________

Please submit all information to:

DBE Coordinator, MWIFA 1800 Washington Blvd., Baltimore MD 21230 Phone: 410-537-3146, Fax: 410-537-3968 __________________________________ ___________________________________

Grant Recipient Name and Title OR Prime Contractor Name and Title Contact Phone # ___________________ Signature/ Date: ______________________

13 January 2026

APPENDIX A:

MDE’S MINORITY AND WOMEN’S BUSINESS ENTERPRISES

(M/WBES) PROGRAM

MDE’s Minority and Women’s Business Enterprises (M/WBEs) Program applies to contract procurement actions funded in part by MDE assistance agreements awarded after October 1, 2008. The authorization is found at Maryland State regulation, Environment Article 9: Section 9-345(d); Section 9-421(d); and,

Section

9-1605.2(i) (4).

Grant Recipient Responsibilities:

• Include MDE’s guidance in each contract with a primary contractor.

• Employ the six Good Faith Efforts during prime contractor procurement.

• Require prime contractor to comply with the following prime contractor requirements:

- Provide to prime contractor MDE form M/WBE Participation - Good Faith Efforts

Checklist: State Grant Recipients and Prime (Construction & A/E) Contractors (pg. 12).

- Provide to prime contractor MDE form Solicitation Summary and Results: – Attachment A:

Grant Recipients and Prime (Construction & A/E) Contractors. (pg. 13)

- Prime contractor to pay its subcontractor for satisfactory performance no more than 30 days

from the prime contractor’s receipt of payment from the recipient.

- Prime contractor to notify grant recipient in writing prior to any termination of a M/WBE

subcontractor for convenience by the prime contractor.

- Prime contractor to notify subcontractor in writing prior to any termination of a M/WBE

subcontractor for convenience by the prime contractor.

- To employ the six good faith efforts if soliciting a replacement subcontractor after a M/WBE

subcontractor fails to complete work under the subcontract for any reason.

- To employ the six good faith efforts even if MDE’s fair share goals objectives are achieved.

• Maintain records documenting its compliance with the requirements, including a BIDDERS LIST

and documentation of its and its prime contractors’good faith efforts.

14 January 2026 Prime Contractor Responsibilities:

• Employ the five Good Faith Efforts steps (1) through (5) if the prime contractor awards

subcontracts.

• Provide completed MDE M/WBE Participation - Good Faith Efforts Checklist: State Grant

Recipients and Prime (Construction & A/E) Contractors to MDE’s DBE Coordinator (pg. 12).

• Provide completed MDE form Solicitation Summary and Results - Attachment A: Grant Recipients

and Prime (Construction & A/E) Contractors MDE’s DBE Coordinator. Complete one form for each subcontract. (pg. 13)

• Pay subcontractors for satisfactory performance no more than 30 days from the prime contractor’s

receipt of payment from the recipient.

• Notify the subcontractor in writing prior to termination for convenience.

• Employ the five good faith efforts if soliciting a replacement subcontractor after a M/WBE

subcontractor fails to complete work under the subcontract for any reason.

• Employ the five good faith efforts even if the prime contractor has achieved its fair share goals.

• Maintain records documenting its compliance with the requirements, including BIDDERS LIST

documentation good faith efforts.

MDE Form Requirement Provided By Completed By Submitted To GOODFAITH Grant Recipients and MDE Grant Recipient MDE DBE EFFORTS Prime Contractor & Prime Coordinator CHECKLIST required to fill Contractor (Page 10) SOLICITATION Grant Recipients and MDE Grant Recipient MDE DBE OF SUMMARY Prime Contractor & Prime Coordinator Attachment A required to fill Contractor (Page 11) 15 January 2026

APPENDIX B: STATE GRANT

GOOD FAITH EFFORTS

When do the requirements apply?

The requirements apply to procurement under MDE financial assistance agreements performed entirely within the State of Maryland, whether by a grant recipient or its prime contractor, for construction, equipment, services, and supplies.

What assurances must MDE obtain from recipients of MDE’s financial assistance?

The grant and prime contractor must ensure that each procurement contract it awards contains the term and conditions specified in Appendix A concerning compliance with the M/WBE contract requirements.

Is there a list of certified MBEs and WBEs?

Maryland Department of Social and Economic Mobility will maintain a list of certified MBEs and WBEs on their website. Any interested person may also obtain a copy of the list from MDE’s DBE Coordinator.

What is required?

A grant recipient is required to make the following good faith efforts (a through f) whenever procuring construction, equipment, services and supplies under an MDE financial assistance agreement, even if it has achieved its fair share goals.

A prime contractor is required to make the following good faith efforts (a through e) whenever procuring construction, equipment, services and supplies under an MDE financial assistance agreement, even if it has achieved its fair share goals:

(a) Ensure M/WBEs are made aware of contracting opportunities fully practicable through outreach

and recruitment activities by placing qualified minority business enterprises (MBEs) and women’s business enterprises (WBEs) on solicitation lists.

(b) Assure that MBEs and WBEs are solicited whenever they are potential sources.

permit maximum participation of M/WBEs and post solicitations for bids or proposals for a minimum of 30 calendar days before the bid or proposal closing date.

(d) Make information on forthcoming opportunities available to M/WBEs and arrange periods for

contracts by establishing delivery schedules, where the requirement permits, which encourage participation by MBEs and WBEs.

(e) Use the services of the Maryland Department of Social and Economic Mobility (DOSEM)

which is designated as the primary agency within Maryland for listing and certifying MBEs. See

Appendix C

for full list of references for M/WBE lists.

(f) Grant recipients must require the prime contractor, if subcontracts are to be let, to apply the

good faith efforts listed above (a through e).

16 January 2026

APPENDIX C: RESOURCE LISTING AND CONTACT INFORMATION

FOR UTILIZATION OF MINORITY AND WOMEN’S BUSINESS ENTERPRISES

Resource Listing Contact Website if applicable State of Maryland Governor’s Office of Governor's Office of Minority http://www.oma.state.md.us/ Minority Affairs Affairs The mission of the Governor's Office of Minority Suite 1502 Affairs (GOMA) is facilitating minority business 6 Saint Paul Street enterprise activities through coordinating and Baltimore MD 21202 promoting government programs aimed at 767-8232

strengthening and preserving the state’s minority 1-(877) 558-0998 and women owned businesses. f-(410) 333-7568 info@mdminoritybusiness.com eMARYLAND MARKETPLACE Website https://emma.maryland.gov/ ADVANTAGE The official online procurement page.aspx/en/usr/login?Retu tool for the state of Maryland. rnUrl=%2fpage.aspx%2fen %2fbuy%2fhomepage U.S. Small Business Administration (SBA) In Website www.sba.gov/category/naviga

addition to the national office, the SBA has local tiondistrict and regional offices to assist small structure/contracting/workingbusinesses in contracting with the public and with-government private sector.

CCR/Pro-Net is an extensive database that CCR Assistance Center www.ccr.gov/ combines the SBA’s Pro-Net database and the 888-227-2423 Select “Dynamic Small DOD’s Central Contractor Registration database 269-961-5757 Business of small businesses. DSN: 661-5757 U. S. Small Business Administration (SBA) - City Crescent Bld. 6th Floor www.sba.gov/tools/local- MD. District Office 10 South Howard St. assistance/districtoffices

Baltimore MD 21201 Phone: 410 962-6195 Minority Business Development Administration 1401 Constitution Ave NW www.mbda.gov/ (MBDA): The MBDA is an agency within the U.S. Washington, D.C. 20230 Dept. of Commerce, created to foster the Email: support@mbda.gov development and growth of minority businesses in 1.888.324.1551 the U.S. and coordinates resources in the public and private sectors to help MBE’s. Recipients and

bidders should contact the centers and provide notices of contracting opportunities. Also, see the Phoenix database, which matches minority companies with business opportunities.

Standard Industrial Classification Codes (SIC) or Website www.sba.gov/content/north- North American Industry Classification System american-industry- (NAICS) codes visit the website. classification-system-codesand-small-business-sizestandards 17 January 2026 Maryland Department of Social and Economic Office Address https://economicmobili Mobility (DOSEM) -- Loan recipients and bidders 100 Community Place, 4th Floor ty.maryland.gov/Pages/

default.aspx may locate qualified M/WBE’s through the Crownsville, MD 21032 MBE/WBE Directory.

https://marylandmdbe.gob2g.co m/ Click on “Search Directory of Certified Firms.” Select any combination of the fields to identify M/WBE’s for the specific project opportunities.

U.S. EPA Office of Small, Disadvantaged Business US.EPA http://cfpub.epa.gov/sbvps/ Utilization (OSDBU) – Office of Small Programs http://www.epa.gov/osdbu/ OSDBU’s mission includes “fostering 1200 Pennsylvania Avenue NW Select “search the OSDBU opportunities for partnerships, contracts, Mail Code 1230T Registry” subagreements, and grants for small and Washington, D.C. 20460 Click on the search criteria of

socioeconomically disadvantaged concerns”. interest (ethnicity, size, SIC, One of the resources to assist prime contractors etc.) is a listing of small and disadvantaged businesses (a vendor profile system) registered with OSDBU.

National Black Chamber of Commerce 1350 Connecticut Ave. N.W. www.nationalbcc.org Suite 405 Washington D.C. 20036 Email: info@nationalbcc.org Phone: 202 466-6888 Fax: 202 466-4918 Virginia Hispanic Chamber of Commerce 8300 Boone Blvd., www.vahcc.com (Northern Va.) 4TH Floor Vienna, VA 22182 Phone: 804.378.4099 Fax: 703 893-1269 U.S. Hispanic Chamber of Commerce 2175 K Street NW Suite 100 www.ushcc.com

Washington, D.C. 20037 National Association of Minority Contractors 666 11 Street N.W. www.namcnational.org/ (NAMC) Suite 520 Washington D.C. 20001 Phone: 202 347-8250 Maryland/Washington Minority Contractors 1107 North Point Blvd, Suite 227 www.mwmca.org (MWMCA) Baltimore, MD 21224 410.282.6101 410.282.6102 –fax National Association of Women’s Business 1760 Old Meadow Rd. Ste 500 www.nawbo.org Owners (NAWBO) – National McLean VA 22102

Phone: 800.556.NAWBO 703.506.3268 703.506.3266-fax 18 January 2026 NAWBO Baltimore Regional Chapter 4404 Silverbrook Lane, www.nawbomaryland.org Suite E-204 Owings Mills MD 21117 Email:

Phone: 410 876-0502 info@nawbomaryland.org 410.654.9734-fax NAWBO Delaware Chapter P.O. Box 4657 www.nawbodelaware.org Greenville Station Greenville, DE 19807-4657 Email:

Phone: 302 355.9945 info@nawbodelaware.org MD/DC Minority Supplier Development 10770 Columbia Pike http://mddccouncil.org/ Council (MSDC) Lower Level, Suite L100 Silver Spring MD 20901 Phone: 301 592-6710 Fax: 301 592-6704 National Minority Supplier Development 1040 Avenue of the Americas, 2nd www.nmsdcus.org/ Council, Inc. (NMSDC) Floor New York, New York 10018 Phone: 212 944-2430 212.719.9611-fax

UIDA Business Services is a Native American 86 South Cobb Drive, MZ:0510 Procurement and Technical Assistance Center- Marietta, GA 30063-0510 maintains a comprehensive database of Native Phone, 770 494-0431 American owned firms 770.494.1236-fax or Northeast Region 2340 Dulles Corner Blvd Mail Stop: 1n01 Herndon, VA 20171 Phone: 703.561.3120 703.561.3124-fax Diversity Business 200 Pequot Avenue www.diversitybusiness.com/

(A multi-cultural online resource) Southport, CT 06890 Phone 203.255.8966 203.255.8501-fax National Association of Women in Construction 327 S. Adams Street www.nawic.org/ Fort Worth, TX 76104 Phone: 1-800-552-3506 Phone: 817.877.5551 817.877.0324-fax 19

CONTRACT FORMS

CONTRACT NO. SAN 26-01

00530 Agreement 00610 Performance Bond 00620 Payment Bond 00630 Maintenance Bond 00690 Application for Payment Affidavit

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project

AGREEMENT

THIS AGREEMENT, is entered into this _____ day of _______________, 20__ by and between the County Commissioners of Queen Anne's County, Maryland, hereinafter called OWNER, and a Corporation known as ___________________________________

organized and existing under the laws of the State of ________________hereinafter called CONTRACTOR.

WITNESSETH, that OWNER and CONTRACTOR, in consideration of the mutual covenants hereinafter set forth, agree as follows:

Article 1. WORK

CONTRACTOR shall complete all Work as specified and indicated in the Contract Documents for “Contract No. SAN 26-01 – Sudlersville Wastewater Treatment Plant ENR Improvement Project”.

Article 2. ENGINEER

McCrone, Inc., is hereinafter called ENGINEER and will assume all duties and responsibilities and will have the rights and authority assigned to ENGINEER in the Contract Documents in connection with completion, inspection and review of the Work and other duties and responsibilities of the ENGINEER in accordance with the Contract Documents.

Article 3. CONTRACT TIME

3.1 The Work will be substantially complete in accordance with paragraph 14.8 of the General Conditions within 395 consecutive calendar days after the Effective Date of this Agreement.

3.2 The Work will be completed and ready for final payment in accordance with paragraph 14.13 of the General Conditions within 455 consecutive calendar days after the Effective Date of this Agreement.

3.2 Liquidated Damages: It is acknowledged that the CONTRACTOR’s failure to achieve substantial completion of the Work within the Contract Time provided by the Contract Documents will cause the OWNER to incur substantial economic damages and losses of types and in amounts which are impossible to compute and ascertain with certainty as a basis for recovery by the OWNER of actual damages, and that liquidated damages represent a fair, reasonable and appropriate estimate

thereof. Accordingly, in lieu of actual damages for such delay, the CONTRACTOR agrees that liquidated damages may be assessed and recovered by the OWNER as against the CONTRACTOR and its Surety. In the event of delayed completion and without the OWNER being required to present any evidence of the amount or

6/5/2026 00530-1 AGREEMENT

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project character of actual damages sustained by reason thereof; therefore CONTRACTOR shall be liable to the OWNER for payment of liquidated damages in the amount of One Thousand Dollars ($1000.00) for each day Substantial Completion is delayed beyond the delayed beyond the Contract Time as adjusted for the time extensions provided by the Contract Documents. Such liquidated

damages are intended to represent estimated actual damages and are not intended as a penalty, and CONTRCTOR shall pay them to OWNER without limiting OWNER’s right to terminate this Agreement for default as provided elsewhere herein.

Article 4. CONTRACT PRICE

OWNER shall pay CONTRACTOR for performance of the Work in accordance with the Contract Documents in lawful money of the United States of America the sum of $__________________ in accordance with CONTRACTOR'S Unit Price Bid.

Article 5. PAYMENT

CONTRACTOR shall submit monthly applications for Payment in accordance with Article 14 of the General Conditions. A retainage equal to 5% of the value of the work completed shall be withheld until Substantial Completion. Refer to General Conditions Article 14 for additional information on the disposition of retainage. Final payment shall not be made until the submission, review & acceptance of as-builts and any other required close-out

documents.

Article 6. INTEREST

All moneys not paid when due hereunder shall bear interest at the rate of 6% per annum.

Article 7. GUARANTEE PERIOD

CONTRACTOR shall warrant and guarantee his Work, materials and equipment in accordance with Article 13 of the General Conditions for a period of two years from the date of OWNER'S approval of the Certificate of Final Completion. The CONTRACTOR shall provide a maintenance bond at 5% of the contract price for two years. Bond shall be placed prior to release of retainage.

Article 8. CONTRACTOR'S REPRESENTATIONS

In order to induce OWNER to enter into this Agreement CONTRACTOR makes the following representations:

8.1 CONTRACTOR has familiarized himself with the nature and extent of the Contract Documents, Work, locality, and with all local conditions and federal, state and local laws, ordinances, rules and regulations that in any manner may affect cost,

6/5/2026 00530-2 AGREEMENT

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project progress or performance of the Work, including the applicability of federal, state or local taxes including sales or use tax and assumes full responsibility for the payment of same.

8.2 CONTRACTOR further covenants and warrants that he has had sufficient time to examine the site of the Work; that he has examined the site of the Work; and that he has based the within contract prices on his own independent examination and investigation of the site, subsurface materials and conditions, and has not relied on any subsurface information or existing underground utility information furnished to

him by OWNER or ENGINEER.

8.3 CONTRACTOR has correlated the results of such observations, examinations, investigations, tests, reports and data with the terms and conditions of the Contract Documents.

8.4 CONTRACTOR has given ENGINEER written notice of all conflicts, errors or discrepancies that he has discovered in the Contract Documents and the written resolution thereof by ENGINEER is acceptable to CONTRACTOR.

Article 9. CONTRACT DOCUMENTS

The Contract Documents, which comprise the entire agreement between OWNER and CONTRACTOR, are incorporated to this Agreement by reference, made a part hereof and consist of the following:

9.1 This Agreement 9.2 Project Manual entitled “Contract No. SAN 26-01 – Sudlersville Wastewater Treatment Plant ENR Improvement Project”, dated June 2026.

9.3 All applicable portions of the “Requirements and Contract Provisions for the Project Financed by the State Grants through the Maryland Department of the Environment

– State of Maryland” dated January 18, 2023, which are contained within the

Project Manual.

9.4 Drawings consisting of plans and profiles entitled “Sudlersville WWTP Improvements” consisting of a cover sheet and sheets numbered G-1, through DTLS-5 inclusive, total of 40 sheets, dated June 2026 prepared by McCrone, Inc.

9.5 Addenda numbers ___ through ___, inclusive.

9.6 CONTRACTOR's Bid.

9.7 Documentation submitted by CONTRACTOR prior to Notice of Award.

6/5/2026 00530-3 AGREEMENT

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project 9.8 Any Change Orders, duly delivered after execution of Agreement.

9.9 Payment, Performance, and Maintenance Sureties.

There are no Contract Documents other than those listed above in this Article 9. The Contract Documents may only be altered, amended or repealed by a Change Order.

Article 10. MISCELLANEOUS

10.1 No assignment by a party hereto of any rights under or interests in the Contract Documents will be binding on another party hereto without the written consent of the party sought to be bound; and, specifically but without limitation, moneys that may become due and moneys that are due may not be assigned without such consent (except to the extent that the effect of this restriction may be limited by

law); and, unless specifically stated to the contrary in any written consent to an assignment, no assignment will release or discharge the assignor from any duty or responsibility under the Contract Documents.

10.2 OWNER and CONTRACTOR each binds himself, his partners, successors, assigns and legal representatives to the other party hereto, his partners, successors, assigns and legal representatives in respect to all covenants, agreements and obligations contained in the Contract Documents.

Article 11. OTHER PROVISIONS

11.1 CONTRACTOR agrees that he, and his Subcontractors, will pay each person engaged in the Work of this Agreement not less than the minimum wage determination for the applicable described class of work, in accordance with law, as specified by the State of Maryland or the United States Government, under any Maryland or federal law which is made applicable to the Project, by the terms of the Contract Documents or addenda thereto.

11.2 To the fullest extent permitted by law, the CONTRACTOR shall indemnify and hold harmless the OWNER and the ENGINEER and their agents and employees from and against all claims, damages, losses and expenses, including but not limited to attorney’s fees, arising out of or resulting from the performance of the Work, provided that any such claim, damage, loss or expense (1) is attributable to bodily injury, sickness, disease or death, or to injury to or destruction of

tangible property (other than the Work itself) including the loss of use resulting there from, and (2) is caused in whole or in part by any negligent act or omission of the CONTRACTOR, any Subcontractor, anyone directly or indirectly employed by any of them or anyone for whose acts any of them may be liable, regardless of whether or not it is caused in part by a party indemnified hereunder. Such obligation shall not be construed to negate, abridge, or otherwise reduce any

6/5/2026 00530-4 AGREEMENT

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project other right or obligation of indemnity, which would otherwise exist as to any party or person, described in this Paragraph 11.2.

11.3 In any and all claims against the OWNER or the ENGINEER or any of their agents or employees by any employee of the CONTRACTOR, any Subcontractor, or anyone directly or indirectly employed by any of them or anyone for whose acts any of them may be liable, the indemnification obligation under Paragraph 11.2 shall not be limited in any way by any limitation on the amount or type of damages, compensation or benefits payable by or for the

CONTRACTOR or any Subcontractor under worker's or workmen's compensation acts, disability benefit acts or other employee benefit acts.

IN WITNESS WHEREOF, the parties hereto have signed four (4) copies of this Agreement. One duplicate original each has been delivered to OWNER, CONTRACTOR and ENGINEER. All portions of the Contract Documents have been signed or identified by OWNER and CONTRACTOR or by ENGINEER on their behalf.

This Agreement will be effective on __________________, 202__.

OWNER: The County Commissioners of CONTRACTOR: ______________

Queen Anne's County, MD ______________________________/s/ ______________________________/s/ Alan L. Quimby, Director Public Works Name, Title ______________________________/s/ Treasurer Attest: Attest:

_______________________________ _______________________________/s/

6/5/2026 00530-5 AGREEMENT

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project

PERFORMANCE BOND

KNOW ALL MEN BY THESE PRESENTS:

That We, ________________________________________________________ as Principal, and ___________________________________________ a corporation organized and existing under the laws of the State of Maryland and authorized to do business in the State of Maryland, as Surety, are held and firmly bound unto the County Commissioners of Queen Anne's County, Maryland, as Obligee, in the full and just sum of

________________________________________________ Dollars ($_______________) (100% of the Contract Price) lawful money of the United States of America, for the payment of which sum, well and truly be made, we bind ourselves, our heirs, executors, administrators, successors and assigns, jointly and severally, firmly by these presents.

THE CONDITIONS OF THIS OBLIGATION are such that WHEREAS, the Principal contemplates entering into a certain Contract with the Obligee for construction of Contract No. SAN 26-01 – Sudlersville Wastewater Treatment Plant ENR Improvement Project”, with a Project Manual dated June 2026, pursuant to drawings, specifications and other related documents, constituting the Contract Documents, which are incorporated into the Agreement by reference, and

NOW, THEREFORE, if the Principal and Obligee shall enter into an Agreement with respect to performance of such work, and if the Principal shall well, truly and faithfully perform its duties, all the undertakings, covenants, terms, and conditions of the Agreement and the Contract Documents during the original term thereof, and any extensions thereof, then this obligation shall be void; otherwise to remain in full force and effect.

The obligation of the Surety hereunder shall extend to all obligations of the Principal in connection with warranty and/or maintenance obligations of the Principal which survive the completion of the work.

PROVIDED, FURTHER, that the said Surety, for value received hereby agrees that no change, extension of time, alteration or addition to the terms of the Contract or to the work to be performed thereunder or the specifications accompanying the same shall in any way affect the obligation of the Surety on this Bond, and the Surety does hereby waive notice of any such change, extension of time, alteration or addition to the terms of the Contract or

to the work or to the specifications.

6/5/2026 00610-1 PERFORMANCE BOND

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project

IN WITNESS WHEREOF,

the Principal and Surety cause this instrument to be Signed, Sealed and Delivered this _____ day of _________________, 202___.

PRINCIPAL

_________________________________

___________________________/s/ By: __________________________/s/ (Principal) Secretary Address: ________________________

________________________

___________________________/s/ Witness as to Principal Address: ________________________ (SEAL) ________________________

SURETY

_________________________________

_____________________________/s/ By: __________________________/s/ (Surety) Secretary Attorney-in-Fact Address: ________________________

________________________

_____________________________/s/ Witness as to Surety Address: ______________________ (SEAL) ______________________

NOTES:

Attach an appropriate Power of Attorney, dated as of the same date as the Bond, evidencing the authority of the Attorney-in Fact to act on behalf of the corporation.

6/5/2026 00610-2 PERFORMANCE BOND

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project Surety companies executing bonds must appear on the U.S. Department of the Treasury most current Bond List (Circular 570 as amended). Bond amounts are subject to the underwriting limitation listed in the most recent Circular 570.

6/5/2026 00610-3 PERFORMANCE BOND

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project

PAYMENT BOND

KNOW ALL MEN BY THESE PRESENTS:

That We,________________________________________________________ as Principal, and ___________________________________________ a corporation organized and existing under the laws of the State of Maryland and authorized to do business in the State of Maryland, as Surety, are held and firmly bound into the County Commissioners of Queen Anne's County, Maryland, as Obliged, in the full and just sum of

______________________________________________ Dollars ($_________________) (100% of the Contract Price) lawful money of the United States of America, for the payment of which sum, well and truly be made, we bind ourselves, our heirs, executors, administrators, successors and assigns, jointly and severally, firmly by these presents.

THE CONDITIONS OF THIS OBLIGATION are such that WHEREAS, the Principal contemplates entering into a certain Contract with the Obliged for construction of Contract No. SAN 26-01 – Sudlersville Wastewater Treatment Plant ENR Improvement Project”, with a Project Manual dated June 2026, pursuant to drawings, specifications and other related documents, constituting the Contract Documents, which are incorporated into the Agreement by reference, and

NOW, THEREFORE, if the Principal and Obliged shall enter an Agreement with respect to performance of such work, and if the Principal shall promptly make payment to all persons, firms, Subcontractors, associations, partnerships and corporations furnishing materials for or performing labor in prosecution of the work provided for in such Agreement and the Contract Documents during the term thereof, then this obligation shall be void; otherwise

to remain in full force and effect.

The obligation of the Surety hereunder shall extend to all indebtedness incurred by the Principal in connection with warranty and/or maintenance obligations of the Principal which survive the completion of the work.

to the work or to the specifications.

6/5/2026 00620-1 PAYMENT BOND

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project

IN WITNESS WHEREOF,

The Principal and Surety cause this instrument to be Signed, Sealed and Delivered this _____ day of ____________, 202___.

PRINCIPAL

_________________________________

___________________________/s/ By: __________________________/s/ (Principal) Secretary Address: ________________________

________________________

___________________________/s/ Witness as to Principal Address: ________________________ (SEAL) ________________________

SURETY

_________________________________

_____________________________/s/ By: __________________________/s/ (Surety) Secretary Attorney-in-Fact Address: ________________________

________________________

_____________________________/s/ Witness as to Surety Address: ______________________ (SEAL) ______________________

NOTES:

Attach an appropriate Power of Attorney, dated as of the same date as the bond, evidencing the authority of the Attorney-in-Fact to act on behalf of the corporation.

6/5/2026 00620-2 PAYMENT BOND

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project Surety companies executing bonds must appear on the U.S. Department of the Treasury Most current Bond List (Circular 570 as amended). Bond amounts are subject to the underwriting limitation listed in the most recent Circular 570

6/5/2026 00620-3 PAYMENT BOND

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project

MAINTENANCE BOND

KNOW ALL MEN BY THESE PRESENTS, that we, _____________________________

______________________________________________________________________

of ___________________________________________________________________

______________________________________________________________________

a corporation incorporated under the laws of the State of ____________as SURETY, are held and firmly bound unto the County Commissioners of Queen Anne's County, Maryland in the full and just sum of (5% of the Contract Price) _____________________________________________ dollars ($_________________), lawful money of the United States of America, to be paid to said County Commissioners of Queen Anne's County, Maryland, or its assigns, to which payment, well and truly to be

made, we bind ourselves, our heirs, executors, administrators, and successors, jointly and severally, firmly by these presents.

Sealed with our respective seals and dated this _____ day of _________ 202_.

WHEREAS, the above bounden PRINCIPAL has entered into a contract with the said County Commissioners of Queen Anne's County, Maryland bearing even date herewith, for the construction of Contract No. SAN 26-01 – Sudlersville Wastewater Treatment Plant ENR Improvement Project”, with a Project Manual dated June 2026, for approximately the sum of _______________________________________ dollars ($____________________), and

WHEREAS, it was one of the conditions of the award with the County Commissioners of Queen Anne's County, pursuant to which said contract was entered into, that these presents should be executed.

NOW THEREFORE, if the Principal shall remedy without cost to the OWNER any defects which develop during a period of two (2) years from the date of completion and acceptance of the work performed under said contract provided such defects, in the judgment of the OWNER or his successor having jurisdiction in the premises, are caused by defective or inferior materials or workmanship, then this obligation shall be void;

otherwise to remain in full force or virtue.

6/5/2026 00630-1 MAINTENANCE BOND

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project IN WITNESS WHEREOF, the said PRINCIPAL and SURETY have duly executed this bond under seal the day and year first above written.

_____________________________(SEAL)

CONTRACTOR

BY

ATTEST ___________________________________

AUTHORIZED OFFICER (CORPORATE SEAL)

_ (SEAL)

SECRETARY

_ (SEAL)

_______________________________ (SEAL)

___________________________________

SURETY COMPANY

ATTEST BY

_______________________________ _________________________________

(SEAL) SECRETARY ATTORNEY-IN-FACT

NOTES:

Attach an appropriate Power of Attorney, dated as of the same date as the bond, evidencing the authority of the Attorney-in-Fact to act on behalf of the corporation.

Surety companies executing bonds must appear on the U.S. Department of the Treasury Most current Bond List (Circular 570 as amended). Bond amounts are subject to the underwriting limitation listed in the most recent Circular 570.

6/5/2026 00630-2 MAINTENANCE BOND

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project THE UNDERSIGNED CONTRACTOR HEREBY SWEARS UNDER PENALTY OF PERJURY THAT (1) THE ATTACHED APPLICATION FOR PAYMENT NO. ____ IS A TRUE AND CORRECT STATEMENT OF WORK DONE AND MATERIAL INCORPORATED TO DATE, (2) ALL MATERIALS AND EQUIPMENT INCORPORATED IN THE SAID PROJECT OR OTHERWISE LISTED IN OR COVERED BY THIS APPLICATION FOR PAYMENT ARE FREE AND CLEAR OF ALL LIENS,

CLAIMS, SECURITY INTERESTS AND ENCUMBRANCES. IN ADDITION, CONTRACTOR CERTIFIES THAT THEY HAVE COMPLIED WITH DEPARTMENT OF LABOR, SAFETY AND HEALTH REGULATIONS FOR CONSTRUCTION PROMULGATED UNDER THE OCCUPATIONAL SAFETY AND HEALTH ACT OF 1970.

DATE: __________________________ 20____ ____________________________________

(CONTRACTOR)

BY: ____________________________________

(NAME AND TITLE)

COUNTY OF _________________________

STATE OF _________________________

I HEREBY CERTIFY, that on this ____ day of ________________, 20___, before me, the subscriber, a Notary Public of the State and County aforesaid, personally appeared _________________________________, who acknowledged himself/herself to be the ___________________ of ___________________, being authorized to do so, executed the above application for payment and statement on behalf of said contractor and that all of the statements therein are true,

correct and complete, by signing the name of the corporation/partnership/limited liability company by himself/herself as ________________.

WITNESS my hand and notarial seal.

______________________________________

Notary Public My Commission Expires: _________________

CONDITIONS OF THE CONTRACT

CONTRACT NO. SAN 26-01

00700 General Conditions 00800 Supplemental Conditions 00900 General Requirements 00950 Measurement and Payment

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project

GENERAL CONDITIONS

ARTICLE 1 - DEFINITIONS

Wherever used in these General Conditions or in the other Contract Documents, the following terms shall have the meanings indicated which shall be applicable to both the singular and plural thereof:

Agreement - The written agreement between the OWNER and the CONTRACTOR covering the Work to be performed. The Contract Documents will be attached to and made a part of the Agreement.

Application for Payment - The form furnished by the OWNER which is to be used by the CONTRACTOR in requesting progress payments and which is to include the schedule of values required by paragraph 14.1 and an affidavit of the CONTRACTOR that progress payments theretofore received from the OWNER on account of the Work have been applied by the CONTRACTOR to discharge in full all of the CONTRACTOR's obligations incurred in connection

with the Work covered by all prior applications for payment.

Bid - The offer or proposal of the Bidder submitted on the prescribed form setting forth the prices for the Work to be performed.

Bidder - Any person, firm or corporation submitting a Bid for the Work.

Bonds - Bid, Performance, Payment and Maintenance Bonds and other instruments of security, furnished by the CONTRACTOR and his Surety in accordance with the Contract Documents.

Change Order - A written order to the CONTRACTOR signed by the OWNER authorizing an addition, deletion or revision in the Work, or an adjustment in the Contract Price or the Contract Time issued after execution of the Agreement.

Contract Documents - The Agreement, Addenda (which pertain to the Contract Documents), CONTRACTOR'S Bid (including documentation accompanying the Bid and any post-Bid documentation submitted prior to the Notice of Award) when attached as an exhibit to the Agreement, the Bonds, these General Conditions, the Supplementary Conditions, the Specifications, the Drawings, and any permits provided prior to bid, as the same are more

specifically identified in the Agreement, together with all Modifications issued after the execution of the Agreement.

Contract Price - The total moneys payable to the CONTRACTOR under the Contract Documents.

Contract Time - The number of consecutive calendar days stated in the Agreement for the completion of Work.

06/05/26 00700-1 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project CONTRACTOR - As used herein refers to the firm or company selected to perform the construction of the improvements by the OWNER.

COUNTY - The County Commissioners of Queen Anne's County (synonymous with OWNER).

Day – As used herein refers to a calendar day.

Drawings - The drawings which show the character and scope of the Work to be performed and which have been prepared or approved by the ENGINEER and are referred to in the Contract Documents.

EFFECTIVE DATE OF AGREEMENT - The date as indicated within the Agreement on page 00530-5.

ENGINEER – The engineering firm as shown on the Plans who, as used herein, refers to the OWNER's representative who designed the improvements, will review shop drawings, will respond to Requests For Information, will make periodic field inspections, and will be the initial interpreter of disputes between the OWNER and the CONTRACTOR.

Field Order - A written order issued by the OWNER or ENGINNER which clarifies or interprets the Contract Documents in accordance with paragraph 9.3 or orders minor changes in the Work in accordance with paragraph 10.2.

Final Completion - The date of the approval of the final progress payment.

INSPECTOR – An agent of the OWNER, who is a subordinate of the Resident Project Representative, and ensures the Project is constructed in accordance with the design.

Modification - (a) A written amendment of the Contract Documents signed by both parties; (b) a Change Order; (c) a written clarification or interpretation issued by the OWNER in accordance with paragraph 9.3; or (d) a written order for a minor change or alteration in the Work issued by the OWNER pursuant to paragraph 10.2. A modification may only be issued after execution of the Agreement.

Notice of Award - The written notice by the OWNER to the CONTRACTOR that the CONTRACTOR is qualified to construct the Work and is the apparent low responsible responsive Bidder and that upon compliance with the conditions precedent to be fulfilled by the CONTRACTOR within the time specified, typically related to sureties and insurance, the OWNER may execute and deliver the Agreement to him.

Notice of Intent to Award - The written notice by the OWNER to the CONTRACTOR that while the CONTRACTOR appears to be the low responsible responsive Bidder there are outstanding requirements need to be met in order to be issued a Notice of Award. In essence a ‘conditional’ Notice of Award with the conditions typically being tied to State funding requirements.

06/05/26 00700-2 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project Notice to Proceed - The written notice by the OWNER to CONTRACTOR indicating that all conditions have been fulfilled, the Agreement has been executed, and the CONTRACTOR may occupy the site and begin construction.

OWNER - As used herein shall refer to the entity for which the construction is required in order to improve a property. COUNTY shall be considered synonymous with OWNER.

Project - The entire construction to be performed as provided in the Contract Documents.

Resident Project Representative - The authorized representative of the OWNER who is assigned to the Project site, or any part thereof, and who coordinates all day to day oversight of the construction methods and is the primary liaison between the CONTRACTOR, ENGINEER, and OWNER.

Shop Drawings - All drawings, diagrams, illustrations, brochures, schedules, and other data which are prepared by the CONTRACTOR, a Subcontractor, manufacturer, supplier, or distributor and which illustrate the equipment, material or some portion of the Work.

Specifications - Those portions of the Contract Documents consisting of written technical descriptions of materials, equipment, construction systems, standards and workmanship as applied to the Work and certain administrative details applicable thereto.

Subcontractor - An individual, firm or corporation having a direct contract with the CONTRACTOR or with any other Subcontractor for the performance of a part of the Work at the site.

Substantial Completion - The date as certified by the OWNER when the construction of the Project or a specified part thereof is sufficiently completed, in accordance with the Contract Documents, so that the Project or specified part can be utilized for the purposes for which it was intended, or if there by no such certification, the date when final payment is due in accordance with paragraph 14.13.

Superintendent - CONTRACTOR'S authorized representative who is assigned to the project site and who holds full authority to act and make binding decisions on behalf on the CONTRACTOR short of a contract modification.

Work - Any and all obligations, duties and responsibilities necessary to the successful completion of the project assigned to or undertaken by the CONTRACTOR under the Contract Documents, including the furnishing of all labor, materials, equipment, and other incidentals.

ARTICLE 2 -PRELIMINARY MATTERS

Award:

06/05/26 00700-3 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project 2.1 The award of the Contract, if it is awarded, will be on the basis of material and equipment described in the Drawings or specified in the Specifications without consideration of possible substitute or "or equal" items, and will be to the lowest responsible responsive bidder whose qualifications indicate the award will be in the best interest of the OWNER

and whose proposal complies with all the prescribed requirements. No Notice of Award will be given until the OWNER has concluded such investigations as he deems necessary to establish the responsibility, qualifications and financial ability of the Bidders to do the Work in accordance with the Contract Documents to the satisfaction of the OWNER within the time prescribed. The OWNER reserves the right to reject the Bid of any Bidder who

does not pass such investigation to the OWNER's satisfaction. In analyzing Bids, the OWNER may take into consideration alternates and unit prices, if requested by the Bid Forms. If the Contract is awarded, the OWNER will give the successful Bidder a Notice of Award within the time indicated in the Invitation to Bid.

Delivery of Bonds and Certificates of Insurance:

2.2 The OWNER may, at any time during the firm-bid period following the opening of Bids, give Notice of Intent to Award the Contract to the bidder designated by the OWNER as the apparent lowest responsible responsive bidder for such Work. The Bidder so designated shall furnish to the OWNER within ten days after the date of such notice, the required Payment and Performance Bonds. Failure of the apparent lowest responsible responsive

bidder to deliver the Bonds within the prescribed period shall be just cause for the OWNER to declare the Bid and any Security therefor forfeited. The OWNER may, in its sole discretion, award the Contract to said Bidder, following receipt of said properly executed Bonds. During this same period, the CONTRACTOR will supply certificates of insurance in accordance with Article 5.7.

Forfeiture of Bid Security:

2.3 Failure of the successful Bidder to execute and deliver the Agreement within ten days of the Notice of Intent to Award shall be just cause for the OWNER to annul the Notice of Intent to Award and declare the Bid and any Security therefor forfeited.

Execution of Agreement:

2.4 At least four (4) counterparts of the Agreement and such other Contract Documents as practicable will be signed by the OWNER and the CONTRACTOR within ten days of the Notice of Award. The OWNER and the CONTRACTOR will each receive an executed duplicate original copy of the Contract Documents.

Copies of Documents:

2.5 As the CONTRACTOR has access to true digital copies of the complete set of the Specifications and Drawings, no copies will be furnished by OWNER.

06/05/26 00700-4 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project Before Starting Work:

2.6 Within fourteen (14) days after the issuance of the Notice of Award, the CONTRACTOR will submit to the OWNER for approval, an estimated progress schedule indicating the starting and completion dates of the various stages of the Work, a schedule of shop drawing submissions, a schedule of values for the lump sum items, and an anticipated draw schedule for the length of the contract.

2.7 Before starting the Work, a pre-construction conference will be held to review the above schedules, to establish procedures for handling shop drawings and other submissions and for processing applications for payment, and to establish a working understanding between the parties as to the Project. Present at the conference will be the OWNER or his representative, the ENGINEER, the Resident Project Representative, the CONTRACTOR,

and the Superintendent.

2.8 Before undertaking the Work the CONTRACTOR will carefully study and compare the Contract Documents and check and verify all figures shown thereon and all field measurements. He will at once report in writing to the OWNER any conflict, error or discrepancy which he may discover. The CONTRACTOR assumes full responsibility for having familiarized himself with the nature and extent of the Contract Documents, Work,

locality, and local conditions that may in any manner affect the Work to be done.

Commencement of Contract Time, Notice to Proceed:

2.9 The Contract Time will commence to run on the effective date of the Agreement. A Notice to Proceed will be issued as confirmation that the Work may begin.

Qualifications of Subcontractors, Materialmen and Suppliers:

2.10 Upon submission of the bid, each Bidder will submit to the OWNER and the ENGINEER for acceptance a list of the names of Subcontractors and such other persons and organizations (including those who are to furnish principal items of materials or equipment) proposed for those portions of the Work as to which the identity of the Subcontractors and other persons and organizations must be submitted as specified in the Contract

Documents. Prior to the Notice of Award, the OWNER will notify the apparent low responsible responsive Bidder in writing if either the OWNER or the ENGINEER, after due investigation, has reasonable objection to any Subcontractor, person or organization on such list. The failure of the OWNER or the ENGINEER to make objection to any Subcontractor, person or organization on the list prior to the Notice of Award shall

constitute an acceptance of such Subcontractor, person or organization. Acceptance of any such Subcontractor, person or organization shall not constitute a waiver of any right of the OWNER to reject defective Work, material or equipment, or Work, material or equipment not in conformance with the requirements of the Contract Documents.

06/05/26 00700-5 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project 2.11 If, prior to the Notice of Award, the OWNER or the ENGINEER has reasonable objection to and refuses to accept any Subcontractor, person or organization on such list, the apparent low Bidder may, prior to Notice of Award, either: (a) submit an acceptable substitute and the Bid Price shall be increased or decreased by the difference in cost

occasioned by such substitution; or (b) withdraw his Bid and not forfeit his Bid Security. If, after the Notice of Award the OWNER or the ENGINEER refuses to accept any Subcontractor, person or organization on such list, the CONTRACTOR will submit an acceptable substitute and the Contract Price shall be increased or decreased by the difference in cost occasioned by such substitution and an appropriate Change Order shall

be issued.

Starting the Work:

2.12 The CONTRACTOR will start the Work in accordance with the requirements of the Notice to Proceed.

2.13 Progress meetings shall be held on a monthly basis. The ENGINEER will schedule and administer the meetings throughout the contract duration. The ENGINEER will prepare progress meeting agendas, record minutes, and distribute copies of meeting minutes to all pertinent parties. The CONTRACTOR, or its designated representative, shall attend all progress meeting.

ARTICLE 3 - CORRELATION, INTERPRETATION AND INTENT OF CONTRACT

DOCUMENTS

3.1 It is the intent of the Specifications and Drawings to describe a complete Project to be constructed in accordance with the Contract Documents. The Contract Documents comprise the entire Agreement between the OWNER and the CONTRACTOR. They may be altered only by a Modification.

3.2 The Contract Documents are complementary; what is called for by one is as binding as if called for by all. If the CONTRACTOR finds a conflict, error or discrepancy in the Contract Documents, he will call it to the OWNER's attention in writing before proceeding with the Work affected thereby. In resolving such conflicts, errors and discrepancies, the Documents shall be given precedence in the following order; the Agreement, Addenda,

Supplementary Conditions, the Specifications, these General Conditions, and the Drawings. Figure dimensions in drawings shall govern over scale dimensions, and detailed drawings shall govern over general drawings. Any Work that may reasonably be inferred from the Specifications or Drawings as being required to produce the intended result shall be supplied whether or not it is specifically called for in both Documents. Work,

materials or equipment described in words which so applied have a well-known technical or trade meaning shall be deemed to refer to such recognized standards.

06/05/26 00700-6 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project 3.3 Each and every provision of law and clause required by law to be inserted in these Contract Documents shall be deemed to be inserted herein, and the Contract Documents shall be read and enforced as though it were included herein. If through mistake or otherwise, any such provision is not inserted, or is not correctly inserted, then, upon the

application of either party, the Contract Documents shall forthwith be altered to make such insertion.

ARTICLE 4 - AVAILABILITY OF LANDS, SUBSURFACE CONDITIONS, REFERENCE

POINTS

4.1 The OWNER will provide, as indicated in the Contract Documents and not later than the date when needed by the CONTRACTOR, the lands upon which the Work is to be done, rights-of-way for access thereto, and such other lands which are designated for the use of the CONTRACTOR. Easements for permanent structures or permanent changes in existing facilities will be secured and paid for by the OWNER, unless otherwise specified in

the Contract Documents. If the CONTRACTOR believes that any delay in the OWNER's furnishing these lands for providing such easements entitles him to an extension of the Contract Time, he may make a claim therefor as provided in Article 12. The CONTRACTOR will provide all additional lands and access thereto that may be required for temporary construction facilities or storage of materials and equipment. The

CONTRACTOR shall not utilize any lands, other than those provided by the OWNER, unless and until he shall place on file with the OWNER a written agreement, executed by the property OWNER and the CONTRACTOR, which shall clearly state the terms and conditions under which the CONTRACTOR has obtained permission or right to such use.

Filing of such agreement with the OWNER shall not effect or imply enforcement of agreement terms and conditions by the OWNER.

Subsurface Conditions:

4.2 Certain subsurface conditions have been the basis of Project design. Any subsurface investigation results, test boring data, underground utility locations or other information acquired by the OWNER, or by the ENGINEER for the OWNER prior to Advertisement for Bids, have been acquired for the use of the OWNER only. No claim is made as to the sufficiency, accuracy or completeness thereof where such information may be shown or

inferred on the Drawings. The OWNER makes information available to the CONTRACTOR but only upon the express understanding that all conclusions drawn therefrom are the conclusions of the CONTRACTOR and that providing such information shall in no way constitute a guarantee of accuracy. Neither the OWNER nor the ENGINEER accepts any responsibility for any conclusion, regarding subsurface conditions, that the CONTRACTOR may draw from review of data provided. It is the sole

responsibility of the CONTRACTOR to satisfy himself as to the subsurface conditions to be encountered in the Work, by whatever means he deems advisable. No claims for additional payment due to unanticipated subsurface conditions (including, but not limited

06/05/26 00700-7 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project to, the number, nature, or positioning of underground utilities) will be considered.

Reference Points - General:

4.3 No reference points have been provided. Any points required by the CONTRACTOR will be established at CONTRACTOR's expense. The CONTRACTOR will be responsible for the layout of the work.

4.4 The CONTRACTOR shall furnish qualified personnel and all materials required for construction stakeout. Construction stakeout shall originate from, and be based on, horizontal and vertical control points established by the CONTRACTOR at CONTRACTOR's expense.

The CONTRACTOR shall make all necessary computations required to accurately locate the Work at the coordinates or station values shown on the Drawings. One week prior to proceeding with said Work, the CONTRACTOR shall prepare and submit for the OWNER's review, one copy of the CONTRACTOR's computations required to indicate excavation depths (i.e., cut sheets) and proposed horizontal locations of structures,

pipelines, and appurtenances.

A digital computer file in AutoCAD format of the Work is available from the ENGINEER for the CONTRACTOR's use provided the CONTRACTOR signs a Release of Liability form and as such recognizes that the use of the file is at his own risk. CONTRACTOR must take the file as is.

ARTICLE 5 - BONDS AND INSURANCE

Performance, Payment and Maintenance Bonds:

5.1 The CONTRACTOR will furnish Performance, Payment, and Maintenance Bonds as security for the faithful performance, payment, and warranty of all his obligations under the Contract Documents. These Bonds shall be in amounts as shown in the Instructions to Bidders and in the form and with such sureties as are acceptable to the OWNER.

Performance and Payment bonds shall remain in effect until final payment has been made in accordance with paragraph 14.12 and the Maintenance Bond at all times thereafter during the warranty period specified in paragraph 13.9.

CONTRACTOR's Liability Insurance:

5.2 OWNER: The legal title and address of the OWNER is:

The County Commissioners of Queen Anne’s County 107 North Liberty Street

06/05/26 00700-8 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project Centreville, MD 21617 5.3 CONTRACTOR'S Liability Insurance: The CONTRACTOR shall purchase and maintain insurance during the life of this Contract such Comprehensive General Liability Insurance including product and completed operations liability insurance as will provide protection from the CONTRACTOR'S performance of the Work and the

CONTRACTOR'S other obligations under the Contract Documents, whether such performance is by the CONTRACTOR, or by a Subcontractor, by anyone directly or indirectly employed by any of them, or by anyone for whose acts any of them may be liable. This coverage shall include:

Bodily Injury $1,000,000 per occurrence/$2,000,000 aggregate Property Damage $1,000,000 per occurrence/$2,000,000 aggregate Personal Injury $1,000,000 per occurrence/$2,000,000 aggregate Products & Completed Ops $1,000,000 per occurrence/$2,000,000 aggregate 5.3.1 Excess Liability – per occurrence amount shall be equal to the amount of the bid, rounded to the nearest million dollars, less the above General Liability per occurrence

amount. The Excess Liability coverage follows the terms and conditions of the Primary Commercial General Liability, Public Official Liability (Owner’s Protective Liability) and Automobile Liability coverages.

5.4 Comprehensive Automobile Liability Insurance: The CONTRACTOR shall purchase and maintain during the life of this Contract such Comprehensive Automobile Liability Insurance including Employer's Non-Owned and Hired Car Liability.

5.4.1 Minimum combined single limit for bodily injury and property damage shall be $1,000,000 per occurrence/$2,000,000 aggregate.

5.5 Worker's Compensation Insurance: The CONTRACTOR shall purchase and maintain during the life of this Contract standard Worker's Compensation Insurance as statutorily required by Maryland including employer’s liability coverage (Coverage B) with limits of at least $100,000 or as required by law, whichever is greater. A Broad Form All States Endorsement shall be attached.

5.6 OWNER's Protective Liability Insurance: The CONTRACTOR shall take out and furnish to the OWNER and maintain during the life of this Contract, OWNER'S Protective Liability Insurance including Full XCU with coverage in amounts specified in paragraph 5.3 covering personal injury and property damage.

Insurance Certificates and Policies:

06/05/26 00700-9 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project 5.7 The CONTRACTOR shall file with the OWNER, as hereinbefore required, satisfactory proof of acceptable insurance coverage. Such proof shall, unless otherwise required by the OWNER, consist of the following:

5.7.1 Certificates of all insurance policies shall be furnished in a number of copies equal to the number of counter parts of the Contract Documents executed.

Which copies shall be clear, readable reproductions, but must be the entire policy including endorsements, exceptions, riders, qualifications and restrictions, exactly as maintained in the records of the insured.

5.7.2 Certificates of insurance on the insurance carrier's standard form indicating all policies required by law and the Contract Documents. Each certificate shall carry the provision that the policy may not be canceled or materially changed except upon sixty (60) days (or the legal minimum, whichever is greater) written notice to the OWNER. All insurance shall be kept in force throughout the entire construction period and remain in effect until finally

complete in accordance with paragraph 14.12.

5.7.3 The Certificates of all insurance policies shall list the OWNER (with the address) as the Certificate Holder and shall name the OWNER as an “additional insured”.

ARTICLE 6 - CONTRACTOR'S RESPONSIBILITIES

Supervision and Superintendence:

6.1 The CONTRACTOR will supervise and direct the Work efficiently and with his best skill and attention. He will be solely responsible for the means, methods, techniques, sequences and procedures of construction. The CONTRACTOR will be responsible to see that the finished Work complies accurately with the Contract Documents.

6.2 The CONTRACTOR will maintain on the Work at all times during its progress a competent resident Superintendent, who shall not be replaced without written notice to the OWNER except under extraordinary circumstances. The Superintendent will be the CONTRACTOR's representative at the site and during progress meetings and shall have authority to act on behalf of the CONTRACTOR. All communications given to the

Superintendent shall be as binding as if given to the CONTRACTOR. All communication from the Superintendent shall be as binding as if given by the CONTRACTOR.

Labor, Materials and Equipment:

6.3 The CONTRACTOR will provide competent, suitably qualified personnel to survey and lay out the Work and perform construction as required by the Contract Documents. He will at all times maintain good discipline and order at the site.

06/05/26 00700-10 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project 6.4 The CONTRACTOR will furnish all materials, equipment, labor, transportation, construction equipment and machinery, tools, appliances, fuel, power, lights, heat, telephone, water and sanitary facilities, and all other facilities and incidentals necessary for the execution, testing, initial operation, and completion of the Work.

6.5 All materials and equipment will be new, except as otherwise provided in the Contract Documents. If required by the OWNER, the CONTRACTOR will furnish satisfactory evidence as to the kind and quality of materials and equipment.

6.6 All materials and equipment shall be applied, installed, connected, erected, used, cleaned and conditioned in accordance with the instructions of the applicable manufacturer, fabricator or processors, except as otherwise provided in the Contract Documents.

Substitute Materials or Equipment:

6.7 If it is indicated in the Specifications that the CONTRACTOR may furnish or use a substitute that is equal to any material or equipment specified, and if the CONTRACTOR wishes to furnish or use a proposed substitute, he will, promptly after the award of the Contract, make written application to the OWNER for approval of such a substitute certifying in writing that the proposed substitute will perform adequately the duties imposed

by the general design, be similar and of equal substance to that specified and be suited to the same use and capable of performing the same function as that specified. No substitute shall be ordered or installed without the written approval of the OWNER who shall be the sole judge of equality. Refer to General Requirement section 1.06 for additional details.

Concerning Subcontractors:

6.8 The CONTRACTOR will not employ any Subcontractor, other person or organization of the types referred to in paragraph 2.10 (whether initially or as a substitute) against whom the OWNER or the ENGINEER may have reasonable objection, nor will the CONTRACTOR be required to employ any Subcontractor against whom he has reasonable objection. It is the CONTRACTOR's responsibility to notify, and seek approval from, the OWNER of any additions or deletions to the required list of all

Subcontractors and or other persons.

6.9 The CONTRACTOR will be fully responsible for all acts and omissions of his Subcontractors and of persons directly or indirectly employed by them and of persons for whose acts any of them may be liable to the same extent that he is responsible for the acts and omissions of persons directly employed by him. Nothing in the Contract Documents shall create any contractual relationship between any Subcontractor and the OWNER or

the ENGINEER or any obligation on the part of the OWNER or the ENGINEER to pay or to see to the payment of any moneys due any Subcontractor, except as may otherwise be

06/05/26 00700-11 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project required by law. The OWNER may furnish to any Subcontractor, to the extent practicable, evidence of amounts paid to the CONTRACTOR on account of specific Work done in accordance with the schedule of values.

6.10 The divisions and sections of the Specifications and the identifications of any Drawings shall not control the CONTRACTOR in dividing the Work among Subcontractors or delineating the Work to be performed by any specific trade.

6.11 The CONTRACTOR agrees to bind specifically every Subcontractor to the applicable terms and conditions of the Contract Documents for the benefit of the OWNER. Every Subcontractor, by undertaking to perform any of the Work, will thereby be deemed to be bound by such terms and conditions.

6.12 All Work performed for the CONTRACTOR by a Subcontractor shall be pursuant to an appropriate agreement between the CONTRACTOR and the Subcontractor.

Patent Fees and Royalties:

6.13 The CONTRACTOR will pay all license fees and royalties and assume all costs incident to the use of any invention, design, process or device which is the subject of patent rights or copyrights held by others. He will indemnify and hold harmless the OWNER and the ENGINEER and anyone directly or indirectly employed by either of them from and against all claims, damages, losses and expenses (including attorney’s fees) arising out of any

infringement of such rights during or after completion of the Work, and shall defend all such claims in connection with any alleged infringement of such rights.

Permits:

6.14 The CONTRACTOR will secure and pay for all construction permits and licenses and will pay all governmental charges and inspection fees necessary for the prosecution of the Work, which are applicable at the time of his Bid. Refer to General Requirements section 1.08 for more details as to which permits are which entities responsibility.

Laws and Regulations:

6.15 The CONTRACTOR will give all notices and comply with all laws, ordinances, rules and regulations applicable to the Work. If the CONTRACTOR observes that the Specifications or Drawings are at variance therewith, he will give the OWNER and ENGINEER prompt written notice thereof, any necessary changes shall be adjusted by an appropriate Modification. If the CONTRACTOR performs any Work knowing it to be contrary to such

laws, ordinances, rules and regulations, and without such notice to the OWNER and ENGINEER, he will bear all costs arising therefrom. However, it shall not be his primary responsibility to make certain that the Drawings and Specifications are in accordance with such laws, ordinances, rules and regulations.

06/05/26 00700-12 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project Taxes:

6.16 The CONTRACTOR will pay all sales, consumer, use and other similar taxes required by the law of the place where the Work is to be performed.

Use of Premises:

6.17 The CONTRACTOR will confine his equipment, the storage of materials and equipment and the operations of his workmen to areas permitted by law, ordinances, permits, or the requirements of the Contract Documents; and shall not unreasonably encumber the premises with materials or equipment.

6.18 The CONTRACTOR will not load nor permit any part of the Work to be loaded with weights that will endanger the Work, nor will he subject any part of the Work to stresses or pressures that will endanger it.

6.19 Record Drawings: refer to Section 01700 – 2.0 6.20 Safety: The CONTRACTOR shall be responsible for initiating, maintaining and supervising all safety precautions and programs in connection with the Work. He shall take all necessary precautions for the safety of, and shall provide the necessary protection to prevent damage, injury or loss to:

6.20.1 All employees on the Work and other persons who may be affected thereby.

6.20.2 All the Work and all materials or equipment to be incorporated therein, whether in storage on or off the site.

6.20.3 Other property at the site or adjacent thereto, including trees, shrubs, lawns, walks, pavements, roadways, structures, utilities and Underground Facilities not designated for removal, relocation or replacement in the course of construction.

6.20.4 As between the CONTRACTOR and the ENGINEER and the OWNER, the CONTRACTOR shall have exclusive responsibility for the initiation and execution of measures necessary for the protection of persons and property.

As between the CONTRACTOR and the ENGINEER and the OWNER the CONTRACTOR shall have exclusive responsibility for the means, methods, construction procedures, sequence of operations and every other aspect of the conduct of the Work. Nothing in the Contract Documents shall be construed as imposing upon the ENGINEER or OWNER any responsibility for project safety.

06/05/26 00700-13 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project 6.20.5 The CONTRACTOR will comply with all applicable laws, ordinances, rules, regulations and orders of any public body having jurisdiction for the safety of persons or property or to protect them from damage, injury or loss. He will erect and maintain, as required by the conditions and progress of the Work all necessary safeguards for safety and protection. The CONTRACTOR

shall notify owners of adjacent property and of Underground Facilities and utility owners when prosecution of the Work may affect them. The CONTRACTOR's duties and responsibilities for the safety and protection of the Work shall continue until such time as all Work is completed and the OWNER has issued a notice to the CONTRACTOR in accordance with paragraph 14.13 that the Work is acceptable.

6.20.6 The CONTRACTOR shall designate a responsible representative at the site whose duty shall be the prevention of accidents. This person shall be the CONTRACTOR's superintendent unless otherwise designated in writing by the CONTRACTOR to the OWNER.

6.21 Emergencies: In emergencies affecting the safety of persons or the Work or property at the site or adjacent thereto, the CONTRACTOR without special instruction or authorization from the ENGINEER or the OWNER, is obligated to act, at his discretion, to prevent threatened damage, injury or loss. He will give the OWNER prompt written notice of the cause of the incident leading to the emergency and also of any significant changes in the

Work or deviations from the Contract Documents caused thereby, and a Change Order shall thereupon be issued covering the changes and deviations involved. If the CONTRACTOR believes that additional Work done by him in an emergency which arose from causes beyond his control entitles him to an increase in the Contract Price or an extension of the Contract Time, he may make a claim therefor as provided in Articles 11

and 12.

6.22 Shop Drawings, Certifications, and Samples: - refer to 01300 – 2.0 6.23 Clean Up: The CONTRACTOR shall continuously keep rights-of-way, easement areas, storage areas, streets, roads, highways, and adjacent properties free from accumulations of waste materials, rubbish and windblown debris caused by his operations.

The CONTRACTOR shall daily broom clean paved surfaces and remove surplus materials, tools, construction equipment and machinery as each work area is completed and provide continuous maintenance of temporary paving during the period prior to permanent paving. All trench surfaces shall be maintained for traffic throughout the Contract time period.

Broom clean exterior paved surfaces; rake. Rake clean other surfaces of the grounds.

Restore areas disturbed by construction.

06/05/26 00700-14 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project 6.24 Indemnification: To the fullest extent permitted by law, the CONTRACTOR shall indemnify and hold harmless the OWNER and the ENGINEER and their agents and employees from and against all claims, damages, losses and expenses, including but not limited to attorney's fees, arising out of or resulting from the performance of the Work, provided that

any such claim, damage, loss or expense (1) is attributable to bodily injury, sickness, disease or death, or to injury to or destruction of tangible property (other than the Work itself) including the loss of use resulting therefrom, and (2) is caused in whole or in part by any negligent act or omission of the CONTRACTOR, any Subcontractor, anyone directly or indirectly employed by any of them or anyone for whose acts any of them may be liable,

regardless of whether or not it is caused in part by a party indemnified hereunder. Such obligation shall not be construed to negate, abridge, or otherwise reduce any other right or obligation of indemnity which would otherwise exist as to any party or person described in this Paragraph 6.30.

6.25 In any and all claims against the OWNER or the ENGINEER or any of their agents or employees by any employee of the CONTRACTOR, any Subcontractor, anyone directly or indirectly employed by any of them or anyone for whose acts any of them may be liable, the indemnification obligation under paragraph 6.30 shall not be limited in any way by any limitation on the amount or type of damages, compensation or benefits payable by or for

the CONTRACTOR or any Subcontractor under Workmen's Compensation Acts, Disability Benefit Acts or other employee benefit acts.

ARTICLE 7 - WORK BY OTHERS

7.1 The OWNER may perform additional Work related to the project by himself, or he may let other direct contracts therefor which shall contain general conditions similar to these. The CONTRACTOR will afford the other contractors who are parties to such direct contracts (or the OWNER, if he is performing the additional Work himself), reasonable opportunity for the introduction and storage of materials and equipment and the execution of Work,

and shall properly connect and coordinate his Work with theirs.

7.2 If any part of the CONTRACTOR's Work depends for proper execution or results upon the Work of any such other contractor (or the OWNER), the CONTRACTOR will inspect and promptly report to the OWNER in writing any defects or deficiencies in such Work that render it unsuitable for such proper execution and results. His failure so to report shall constitute an acceptance of the other Work as fit and proper for the relationship of his

Work except as to defects and deficiencies which may appear in the other Work after the execution of his Work.

7.3 The CONTRACTOR will do all cutting, fitting and patching of his Work that may be required to make its several parts come together properly and fit it to receive or be received by such other Work. The CONTRACTOR will not endanger any Work of others by cutting, excavating or otherwise altering their Work and will only cut or alter their Work

06/05/26 00700-15 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project with the written consent of the EGINEER or OWNER.

7.4 If the performance of additional Work by other Contractors or the OWNER is not noted in the Contract Documents prior to the execution of the Contract, written notice thereof shall be given to the CONTRACTOR prior to starting any such additional Work. If the CONTRACTOR believes that the performance of such additional Work by the OWNER or others involves him in additional expense or entitles him to an extension of the Contract

Time, he may make a claim therefor as provided in Articles 11 and 12.

ARTICLE 8 - OWNER'S RESPONSIBILITIES

8.1 The OWNER will issue all formal and official communications to the CONTRACTOR either directly or via their Resident Project Representative.

8.2 The OWNER will furnish the data required to the CONTRACTOR under the Contract Documents promptly and shall make payments to the CONTRACTOR promptly after they are due as provided in paragraph 14.4.

8.3 The OWNER's duties in respect of providing lands, etc. are set forth in paragraphs 4.1 and 4.2.

8.4 In connection with the OWNER's right to stop Work or suspend Work, see paragraphs 13.7 and 15.1. Paragraph 15.2 deals with the OWNER's right to terminate services of the CONTRACTOR under certain circumstances.

8.5 OWNER’s agents will provide day to day inspection of the Work.

Rejecting Defective Work:

8.6 The ENGINEER or OWNER or the Resident Project Representative will have authority to disapprove or reject Work which is defective (which term is hereinafter used to describe Work that is unsatisfactory, faulty or defective, or does not conform to the requirements of the Contract Documents or does not meet the requirements of any inspection, test or approval referred to in paragraph 13.2). They will also have authority to require special

inspection or testing of the Work as provided in paragraph 13.5, whether or not the Work is fabricated, installed or completed.

Shop Drawings, Change Orders and Payments:

8.7 In connection with the OWNER 's responsibility as to Shop Drawings, certifications, and samples, see paragraphs 6.22.

8.8 In connection with the OWNER 's responsibility for Change Orders, see Articles 10, 11, and 12.

06/05/26 00700-16 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project 8.9 In connection with the OWNER 's responsibilities in respect of applications for payment, etc., see Article 14.

Resident Project Representative:

8.10 The OWNER will furnish a full-time Resident Project Representative with assistants (INSPECTORS) to assist in carrying out his responsibilities at the site. The duties, responsibilities and limitations of authority of such Resident Project Representative and assistants shall be as set forth hereinafter.

8.10.1 General: The Resident Project Representative is the OWNER's agent, will act as directed by and under the supervision of the OWNER, and will confer with the ENGINEER regarding his actions when issues with the design arise.

The Resident Project Representative's dealings in matters pertaining to the on-site Work shall in general be only with the ENGINEER and the CONTRACTOR; dealings with Subcontractors shall only be through or with the full knowledge of the CONTRACTOR.

8.10.2 Duties and Responsibilities: The Resident Project Representative shall:

8.10.2.1 Schedule - Receive the construction schedule prepared by the CONTRACTOR and distribute the schedule to the OWNER and ENGINEER.

8.10.2.2 Conferences - Attend preconstruction conferences. Arrange a schedule of progress meetings and other job conferences as required in consultation with the OWNER and notify those expected to attend in advance. Maintain and circulate copies of records of the meetings.

8.10.2.3 Liaison:

8.10.2.3.1 Serve as the OWNER's liaison with the CONTRACTOR working principally through the CONTRACTOR's field Superintendent. Alert the CONTRACTOR, through his field Superintendent, to the hazards involved in accepting and acting upon instructions from the OWNER or others, except such instructions transmitted through the OWNER.

8.10.2.3.2 Cooperate with the CONTRACTOR in his dealings with the various local agencies having jurisdiction over the Project in order to complete service connections to public utilities and facilities.

06/05/26 00700-17 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project 8.10.2.3.3 Assist in obtaining from the OWNER additional details or information, when required at the job site for proper execution of the Work.

8.10.2.4 Approvals - Assist in obtaining from the CONTRACTOR a list of his proposed Suppliers and Subcontractors.

8.10.2.5 Samples - Assist in obtaining field samples of materials delivered to the site which are required to be furnished, and keep record of actions.

8.10.2.6 Shop Drawings - Receive approved Shop Drawings and other submissions, record data received, maintain a file of the drawings and submissions, and check construction for compliance with them.

8.10.2.7 Review of Work, Inspections and Tests:

8.10.2.7.1 Conduct on-site observations of the Work in progress for the OWNER as a basis for determining that the Project is proceeding in accordance with the Contract Documents.

8.10.2.7.2 Verify that tests, including equipment and systems startup, which are required by the Contract Documents are conducted and that the CONTRACTOR maintains adequate records thereof. Observe, record and report to the OWNER appropriate details relative to the test procedures and startups.

8.10.2.7.3 Accompany visiting representatives of public or other agencies having jurisdiction over the Project and record the outcome of these visits.

8.10.2.7.4 Whenever he considers it necessary or advisable to insure the proper carrying out of the intent of the Contract Documents, the Resident Project Representative shall have authority to disapprove Work or materials as failing to comply with the Contract Documents, approved Shop Drawings, or samples.

8.10.2.8 Interpretation of Contract Documents - Transmit to the CONTRACTOR the OWNER 's interpretation of the Contract Documents.

8.10.2.9 Modifications - Consider and evaluate the CONTRACTOR's suggestions for modifications in Drawings or Specifications and report them with recommendations to the OWNER.

06/05/26 00700-18 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project 8.10.2.10 Records:

8.10.2.10.1 Maintain at the job site orderly files for correspondence, reports of job conferences, Shop Drawings and other submissions, reproductions or original Contract Documents including all Addenda, Change Orders and additional Drawings issued subsequent to the award of the Contract, the OWNER's interpretations of the Contract Documents, progress reports, and other Project related documents.

8.10.2.10.2 Keep a diary or log book, recording hours on the job site, weather conditions, list of visiting officials, daily activities, decisions, observations in general, and specific observations in more detail as in the case of observing test procedures.

8.10.2.10.3 Record names, addresses and telephone numbers of all CONTRACTORs, Subcontractors and major material suppliers.

8.10.2.10.4 Maintain a set of Drawings on which authorized changes are noted, and deliver to the OWNER at the completion of the Project.

8.10.2.11 Reports:

8.10.2.11.1 Furnish the OWNER periodic reports as required of progress of the Project and the CONTRACTOR's compliance with the approved construction schedule.

8.10.2.11.2 Consult with the OWNER in advance of scheduled major tests or start of important phases of the Project.

8.10.2.12 Payment Requisitions - Review applications for payment with the CONTRACTOR for compliance with the established procedure for their submission and forward them with recommendations to the OWNER, noting particularly their relation to the Work completed and materials and equipment delivered at the site.

8.10.2.13 Guarantees, Certificates, Operation and Maintenance Manuals - During the course of the Work, assemble guarantees, certificates, maintenance operation manuals and other required data to be furnished by the CONTRACTOR and upon acceptance of the Project, deliver this material to the OWNER for his approval.

06/05/26 00700-19 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project 8.10.2.14 Completion:

8.10.2.14.1 Prior to final inspection, submit to the CONTRACTOR a list of observed items requiring correction and verify that each correction has been made.

8.10.2.14.2 Conduct final inspection in the company of the CONTRACTOR, the ENGINEER and the OWNER and prepare a final list of items to be corrected.

8.10.2.14.3 Verify that all items on final list have been corrected and make recommendations to the OWNER concerning acceptance.

8.10.3 Limitations of Authority: Except upon written instructions of the OWNER, the Resident Project Representative:

8.10.3.1 Shall not authorize any deviation from the Contract Documents.

8.10.3.2 Shall not undertake any of the responsibilities of the CONTRACTOR, the Subcontractors, or the CONTRACTOR's field Superintendent.

8.10.3.3 Shall not expedite the Work for the CONTRACTOR.

8.10.3.4 Shall not advise on or issue directions relative to any aspect of the construction technique or sequence unless a specific technique or sequence is called for in the Contract Documents.

8.10.3.5 Shall not authorize the OWNER to occupy the Project in whole or in part prior to final acceptance of the Work.

8.10.3.6 Shall not participate in specialized field or laboratory tests.

Limitations on OWNER 's Responsibilities:

8.11 Neither the OWNER's authority to act under this Article 8 nor any decision made by him in good faith either to exercise or not exercise such authority shall give rise to any duty or responsibility of the OWNER to the CONTRACTOR, any Subcontractor, any of their agents or employees or any other person performing any of the Work.

8.12 The OWNER will not be responsible for the construction means, methods, techniques, sequences or procedures, or the safety precautions and programs incident thereto, and he will not be responsible for the CONTRACTOR's failure to perform the Work in accordance with the Contract Documents.

06/05/26 00700-20 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project 8.13 The OWNER will not be responsible for the acts or omissions of the CONTRACTOR, or any Subcontractors, or any of his or their agents or employees, or any other persons performing any of the Work.

ARTICLE 9 - ENGINEER'S STATUS DURING CONSTRUCTION

OWNER's Representative:

9.1 The ENGINEER shall be the OWNER's representative during the construction period as it regards issues dealing with design issues and will have limited but specialized participation of the inspection of the Work. The duties and responsibilities and the limitations of authority of the ENGINEER as the OWNER's representative during construction are set forth in Articles 1 through 19 of these General Conditions and shall not

be extended without written consent of the OWNER and the ENGINEER. The ENGINEER shall also act as a neutral party to attempt to resolve disputes between OWNER and CONTRACTOR that the two parties are unable to resolve on their own.

Visits to Site:

9.2 The ENGINEER will make sporadic visits to the site to observe the progress and quality of the executed Work and to determine, in general, if the Work is proceeding in accordance with the Contract Documents. He will not be required to make exhaustive or continuous on-site inspections to check the quality or quantity of the Work. His efforts will be directed toward providing general assurance for the OWNER that the completed Project will

conform to the requirements of the Contract Documents.

Clarifications and Interpretations:

9.3 The ENGINEER or OWNER will issue with reasonable promptness such written clarifications or interpretations of the Contract Documents (in the form of drawings or otherwise) as they may determine necessary, which shall be consistent with or reasonably inferable from the overall intent of the Contract Documents. If the CONTRACTOR believes that a written clarification and interpretation entitles him to an increase in the

Contract Price, he may make a claim therefor as provided in Article 11.

Decisions on Disagreements:

9.4 The ENGINEER will be the initial interpreter of the terms and conditions of the Contract Documents and the judge of the performance thereunder. In his capacity as interpreter and judge he will exercise his best efforts to insure faithful performance by both the OWNER and the CONTRACTOR. He will not show partiality to either and shall not be liable for the result of any interpretation or decision rendered in good faith. Claims,

disputes and other matters relating to the execution and progress of the Work or the

06/05/26 00700-21 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project interpretation of or performance under the Contract Documents shall be referred initially to the ENGINEER for decision, which he shall render in writing within a reasonable time.

9.5 Either the OWNER or the CONTRACTOR may demand arbitration with respect to any such claim, dispute or other matter that has been referred to the ENGINEER, except any which have been waived by the making or acceptance of final payment as provided in paragraph 14.16, such arbitration to be in accordance with Article 16. However, no demand for arbitration of any such claim, dispute or other matter shall be made until the

earlier of (a) the date on which the ENGINEER has rendered his decision; or (b) the tenth day after the parties have presented their evidence to the ENGINEER if he has not rendered his written decision before that date. No demand for arbitration shall be made later than thirty days after the date on which the ENGINEER rendered his written decision in respect of the claim, dispute or other matter as to which arbitration is sought, and the

failure to demand arbitration within said thirty days' period shall result in the ENGINEER's decision being final and binding upon the OWNER and the CONTRACTOR. If the ENGINEER renders a decision after arbitration proceedings have been initiated, such decision may be entered as evidence but shall not supersede the arbitration proceedings, except where the decision is acceptable to the parties concerned.

ARTICLE 10 - CHANGES IN THE WORK

10.1 Without invalidating the Agreement, the OWNER may, at any time or from time to time, order additions, deletions, or revisions in the Work; these will be authorized by Change Orders. Upon receipt of a Change Order, the CONTRACTOR will proceed with the Work involved. All such Work shall be executed under the applicable conditions of the Contract Documents. If any change order causes an increase or decrease in the Contract Price or

an extension or shortening of the Contract Time, an equitable adjustment will be made as provided in Article 11 or Article 12.

10.2 The OWNER may authorize minor changes or alterations in the Work not involving extra cost and not inconsistent with the overall intent of the Contract Documents. These may be accomplished by a Field Order. If the CONTRACTOR believes that any minor change or alteration authorized by the OWNER, entitles him to an increase in the Contract Price, he may make a claim therefor as provided in Article 11.

10.3 Additional Work performed by the CONTRACTOR without authorization of a Change Order will not entitle him to an increase in the Contract Price or an extension of the Contract Time, except in the case of an emergency as provided in paragraph 6.21 and except as provided in paragraphs 10.2, 13.2, and 13.6.

10.4 The OWNER will execute appropriate Change Orders covering changes in Work performed in an emergency as provided in paragraph 6.21 and any other claim of the CONTRACTOR for a change in the Contract Time or the Contract Price which is approved by the OWNER.

06/05/26 00700-22 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project 10.5 It is the CONTRACTOR's responsibility to notify his Surety of any changes affecting the general scope of the Work or change in the Contract Price and the amount of the applicable Bonds shall be adjusted accordingly. The CONTRACTOR will furnish proof of such adjustment to the OWNER.

ARTICLE 11 - CHANGE OF CONTRACT PRICE

11.1 The Contract Price constitutes the total compensation payable to the CONTRACTOR for performing the Work. All duties, responsibilities and obligations assigned to or undertaken by the CONTRACTOR shall be at his expense without change in the Contract Price.

11.2 The Contract Price may only be changed by a Change Order. Any claim for an increase in the Contract Price, shall be in writing delivered to the OWNER within fifteen days of the occurrence of the event giving rise to the claim. All claims for adjustments in the Contract Price shall be determined by the ENGINEER if the OWNER and the CONTRACTOR cannot otherwise agree on the amount involved. Any change in the Contract Price

resulting from any such claim shall be incorporated in a Change Order.

11.2.1 The OWNER at any time without notice to any Surety may make changes in the Work of the Contract by making alterations therein, by making additions thereto, or by omitting Work therefrom, and no such action shall invalidate the Contract, relieve or release the CONTRACTOR from any guarantee under the Contract, affect the terms or validity of any bond, relieve or release any Surety, or constitute grounds for any claim by the CONTRACTOR for

damages or loss of anticipated profits. All Work required by such alterations, additions, or omissions shall be executed under the terms of the Contract.

11.2.2 Other than in an emergency endangering life or property or pursuant to a Field Order, the CONTRACTOR shall not make any changes in the Work nor furnish any labor, equipment, materials, supplies, or other services in connection with any change except pursuant to, and after, receipt of a written authorization from the OWNER in the form of a Change Order or Modification. The CONTRACTOR shall not be entitled to any increase in the

Contract price or extension of the Contract time, and no claim therefor shall be valid, unless such written authorization has been so issued to the CONTRACTOR.

11.2.3 The OWNER may authorize minor changes in the Work which do not alter the character, quantity, or cost of the Work as a whole. These changes may be accomplished by a Field Order. The CONTRACTOR shall carry out such Field Orders Promptly and without any adjustment of the Contract price or Contract time.

06/05/26 00700-23 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project 11.3 The value of any Work covered by a Change Order or of any claim for an increase or decrease in the Contract Price shall be determined in one of the following ways:

11.3.1 Where the Work involved is covered by unit prices contained in the Contract Documents, by application of unit prices to the quantities of the items involved.

11.3.2 By mutual acceptance of a lump sum.

11.3.3 By cost and a mutually acceptable fixed amount for overhead and profit.

11.3.4 If none of the above methods is agreed upon, the value shall be determined by the ENGINEER on the basis of costs and a percentage for overhead and profit. Costs shall only include labor (payroll, payroll taxes, fringe benefits, workmen's compensation, etc.), materials, equipment, and other incidentals directly related to the Work involved. The maximum percentage which shall be allowed for the CONTRACTOR's combined overhead and profit shall be

as follows:

11.3.4.1 For all such Work done by his own organization, the CONTRACTOR may add up to ten percent (10%) of his actual net increase in cost, and 11.3.4.2 For all such Work done by Subcontractors, each Subcontractor may add up to ten percent (10%) of his actual net increase in costs for combined overhead and profit and the CONTRACTOR may add up to five percent (5%) of the Subcontractor's total for his combined overhead and profit,

provided that no overhead or profit shall be allowed on costs incurred in connection with premiums for public liability insurance or other special insurance directly related to such Work.

In such case and also under paragraph 11.3.3 the CONTRACTOR will submit in form prescribed by the ENGINEER an itemized cost breakdown together with supporting data.

11.4 The amount of credit to be allowed by the CONTRACTOR to the OWNER for any such change which results in a net decrease in cost will be the amount of the actual net decrease. When both additions and credits are involved in any one change, the combined overhead and profit shall be figured on the basis of the net increase, if any.

11.5 VARIATIONS IN ESTIMATED QUANTITIES

06/05/26 00700-24 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project 11.5.1 When the quantity of a contract item is an estimated quantity and where the actual quantity of such pay item varies more than 25 percent above or below the estimated quantity stated in this contract, an equitable adjustment in the contract price shall be made upon demand of either party. The equitable adjustment shall be based upon any increase or decrease in costs due solely

to the variation above 125 percent or below 75 percent of the estimated quantity. If the quantity variation is such as to cause an increase in the time necessary for completion, the ENGINEER shall, upon receipt of a written request for an extension of time within 10 days from the beginning of the delay ascertain the facts and make the adjustment for extending the completion date as in his judgment the findings justify.

11.5.2 When the quantity of a contingent contract item is an estimated quantity and where the actual quantity of such pay item varies more than 50 percent above or below the estimated quantity stated in this contract, an equitable adjustment in the contract price shall be made upon demand of either party.

The equitable adjustment shall be based upon any increase or decrease in costs due solely to the variation above 150 percent or below 50 percent of the estimated quantity. If the quantity variation is such as to cause an increase in the time necessary for completion, the ENGINEER shall, upon receipt of a written request for an extension of time within 10 days from the beginning of the delay ascertain the facts and make the adjustment for

extending the completion date as in his judgment the findings justify.

ARTICLE 12 - CHANGE OF THE CONTRACT TIME

12.1 The Contract Time may only be changed by a Change Order. Any claim for an extension in the Contract Time, shall be in writing delivered to the OWNER within ten days of the occurrence of the event giving rise to the claim. All claims for adjustment in the Contract Time shall be determined by the ENGINEER if the OWNER and the CONTRACTOR cannot otherwise agree. Any change in the Contract Time resulting from any such claim

shall be incorporated in a Change Order.

12.2 The Contract Time will be extended in an amount equal to time lost due to delays beyond the control of the CONTRACTOR if he makes a claim therefor as provided in paragraph 12.1. Such delays shall include, but not be restricted to acts or neglect by any separate CONTRACTOR employed by the OWNER, fires, floods, labor disputes, epidemics, abnormal weather conditions, or acts of God.

12.3 All time limits stated in the Contract Documents are of the essence of the Agreement. The provisions of this Article 12 shall not exclude recovery for damages (including compensation for additional professional services) for delay by either party.

06/05/26 00700-25 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project

ARTICLE 13 - WARRANTY AND GUARANTEE, TESTS AND INSPECTIONS, CORRECTION,

REMOVAL OR ACCEPTANCE OF DEFECTIVE WORK

Warranty and Guarantee:

13.1 The CONTRACTOR warrants and guarantees to the OWNER that all materials and equipment will be new unless otherwise specified and that all Work will be of good quality and free from faults or defects and in accordance with the requirements of the Contract Documents and of any inspection, tests or approvals referred to in paragraph 13.2. All unsatisfactory Work, all faulty or defective work and all Work not conforming to the

requirements of the Contract Documents or of such inspections, tests or approvals shall be considered defective. Prompt notice of all defects shall be given to the CONTRACTOR. All defective Work, whether or not in place, may be rejected, corrected or accepted as provided in this Article 13.

13.1.1 The work under the Contract, except as expressly excluded, and all of its subcontracts, severally and collectively, whether herein stipulated in each case or not, shall be guaranteed against faulty workmanship and/or material as specified below from date of acceptance of the work. The provisions of the guarantee and/or guarantees shall be incumbent on all parties of the Work, including the CONTRACTOR, each subcontractor, all material supply

houses and all manufacturers whose products and/or equipment are incorporated into the facilities.

13.1.2 Neither the Certificate of Substantial Completion, Final Certificate of Payment, nor any provisions in the Contract Documents, nor partial or entire use of occupancy of the premises by the OWNER shall constitute an acceptance of Work, materials or equipment not performed or installed in accordance with the Contract Documents, or relieve the CONTRACTOR or his Sureties of liability in respect to any warranties or responsibility for faulty

materials or workmanship.

13.1.3 The CONTRACTOR shall guarantee all materials and equipment furnished and Work performed for a period of two (2) years from the date of Substantial Completion. The CONTRACTOR warrants and guarantees for a period of two (2) years from the date of Substantial Completion of the system that the completed system is free from all defects due to faulty materials or workmanship and the CONTRACTOR shall promptly make such repairs of

any damage to other parts of the system resulting from such defects with reasonable promptness. In the event that the CONTRACTOR should fail to make such repairs, adjustments, or other work that may be necessary by such defects, the OWNER may do so and charge the CONTRACTOR the cost thereby incurred. The Maintenance Bond shall remain in full force and effect through the guarantee period.

06/05/26 00700-26 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project Tests and Inspections:

13.2 If the Contract Documents, laws ordinances, rules, regulations or orders of any public authority having jurisdiction require any Work to specifically be inspected, tested, or approved by someone other than the CONTRACTOR, the CONTRACTOR will give the OWNER timely notice of readiness therefor. The CONTRACTOR will furnish the OWNER the required certificates of inspections, testing or approval. All such tests will be in

accordance with the methods prescribed by the American Society for Testing and Materials or such other applicable organization as may be required by law or the Contract Documents. If any such Work required so to be inspected, tested or approved is covered without written approval of the OWNER, it must, if requested by the OWNER, be uncovered for observation at the CONTRACTOR's expense. The cost of all such

inspections, tests and approvals shall be borne by the CONTRACTOR unless otherwise provided.

13.3 Neither observations by the OWNER nor inspections, tests or approvals by persons other than the CONTRACTOR shall relieve the CONTRACTOR from his obligations to perform the Work in accordance with the requirements of the Contract Documents.

Access to the Work:

13.4 The OWNER or ENGINEER and their representatives will at all times have access to the Work. The CONTRACTOR will provide proper facilities for such access and observation of the Work and also for any inspection, or testing thereof by others. Representatives of any federal, state, or other governmental agency having interest in, or jurisdiction over any of the Work shall at all times have access to the Work.

Uncovering Work:

13.5 If any Work is covered contrary to the written request of the OWNER, it must, if requested by the OWNER, be uncovered for his observation and replaced at the CONTRACTOR's expense.

13.6 If any Work has been covered which the OWNER has not specifically requested to observe prior to its being covered, or if the OWNER considers it necessary or advisable that covered work be inspected or tested by others, the CONTRACTOR, at the OWNER's request, will uncover, expose or otherwise make available for observation inspection or testing as the OWNER may require, that portion of the Work in question, furnishing all

necessary labor, material and equipment. If it is found that such Work is defective, the CONTRACTOR will bear all the expenses of such uncovering, exposure, observation, inspection and testing and of satisfactory reconstruction, including compensation for additional professional services, and an appropriate deductive Change Order shall be issued. If, however, such Work is not found to be defective the CONTRACTOR will be

06/05/26 00700-27 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project allowed an increase in the Contract Price or an extension of the Contract Time, or both, directly attributable to such uncovering, exposure, observation, inspection, testing and reconstruction if he makes a claim therefor as provided in Articles 11 and 12.

OWNER May Stop the Work:

13.7 If the Work is defective, or the CONTRACTOR fails to supply sufficient skilled workmen or suitable materials or equipment, or if the CONTRACTOR fails to make prompt payments to Subcontractors or for labor, materials or equipment, the OWNER may order the CONTRACTOR to stop the Work, or any portion thereof, until the cause for such order has been eliminated. However, this right of the OWNER to stop the Work shall not give rise to

any duty on the part of the OWNER to exercise this right for the benefit of the CONTRACTOR or any other party.

13.8 If required by the OWNER prior to approval of final payment, the CONTRACTOR will promptly, without cost to the OWNER either correct any defective work, whether or not fabricated, installed or completed, or if the work has been rejected by the OWNER, remove it from the site and replace it with non-defective work. If the CONTRACTOR does not correct such defective work or remove and replace such rejected work within a

reasonable time, all as specified in a written notice from the OWNER, the OWNER may have the deficiency corrected or the rejected work removed and replaced. All direct or indirect costs of such correction or removal and replacement, including compensation for additional professional services, shall be paid by the CONTRACTOR, and an appropriate deductive Change Order shall be issued. The CONTRACTOR will also bear the expenses

of making good all work of others destroyed or damaged by his correction, removal or replacement of his defective work.

Guaranty Period:

13.9 If, after the approval of final payment and prior to the expiration of two years after the date of Substantial Completion or such longer period of time as may be prescribed by law or by the terms of any applicable special guarantee required by the Contract Documents, any work is found to be defective the CONTRACTOR will, promptly without cost to the OWNER and in accordance with the OWNER's written instructions, either correct such

defective work, or, if it has been rejected by the OWNER, remove it from the site and replace it with non-defective work. If the CONTRACTOR does not promptly comply with the terms of such instructions, the OWNER may have the defective work corrected or the rejected work removed and replaced, and all direct and indirect costs of such rejected work removed and replaced, and all direct and indirect costs of such removal and

replacement, including compensation for additional professional services, will be paid by the CONTRACTOR.

Acceptance of Defective Work:

06/05/26 00700-28 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project 13.10 If, instead of requiring correction or removal and replacement of defective work, the OWNER (and, prior to approval of final payment, also the ENGINEER) prefers to accept it, he may do so. In such case, if acceptance occurs prior to approval of final payment, a Change Order shall be issued incorporating the necessary revisions in the Contract

Documents, including appropriate reduction in the Contract Price, or, if the acceptance occurs after approval of final payment, an appropriate amount shall be paid by the CONTRACTOR to the OWNER.

Neglected Work by CONTRACTOR:

13.11 If the CONTRACTOR should neglect to prosecute the Work in accordance with the Contract Documents, including any requirements of the progress schedule, the OWNER, after three days written notice to the CONTRACTOR may, without prejudice to any other remedy he may have, make good such deficiencies and the cost thereof (including compensation for additional professional services) shall be charged against the

CONTRACTOR if the ENGINEER approves such action, in which case a Change Order shall be issued incorporating the necessary revisions in the Contract Documents including an appropriate reduction in the Contract Price. If the payments then or thereafter due the CONTRACTOR are not sufficient to cover such amount, the CONTRACTOR will pay the difference to the OWNER.

ARTICLE 14 - PAYMENTS AND COMPLETION

Schedule of Values:

14.1 Within ten days of the Notice of Award, the CONTRACTOR shall submit a schedule of values of that Work including quantities and unit prices, aggregating the Contract Price.

This provision applies to lump sum contracts and to lump sum items in unit price contracts.

This schedule shall be satisfactory in form and substance to the OWNER and shall subdivide the Work into component parts in sufficient detail to serve as the basis for progress payments during construction. Upon approval of the schedule of values by the OWNER, it shall be incorporated into the form of application for payment furnished by the OWNER.

14.2 The date for presentation of monthly applications for progress payments to the OWNER shall be established at the preconstruction conference and will govern all such applications unless modified by the OWNER, which modification shall be made known by written notification to the CONTRACTOR at least twenty days prior thereto. At least ten days prior to the time of monthly presentation to the OWNER, the CONTRACTOR will submit to the

Resident Project Representative, the completed application for payment covering Work completed as of the date of the application and supported by such data as the OWNER may reasonably require. The Work for which application for payment is made must be complete, in place, and in accordance with the Contract Documents. No payment will be

06/05/26 00700-29 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project made for any unit on the schedule of values not complete. Nor will any payment be made for materials and equipment stored on the sites and not actually incorporated in the Work unless previously approved by the OWNER and stored on lands controlled by the OWNER.

CONTRACTOR's Warranty of Title:

14.3 The CONTRACTOR warrants and guarantees that title to all Work, materials and equipment covered by an application for payment, will have passed to the OWNER prior to the making of the application for payment, free and clear of all liens, claims, security interests and encumbrances (hereafter in these General Conditions referred to as liens), and that no Work, materials or equipment covered by an application for payment will have

been acquired by the CONTRACTOR or by any other person performing the Work at the site or furnishing materials and equipment for the Project, subject to an agreement under which an interest therein or encumbrance thereon is retained by the seller or otherwise imposed by the CONTRACTOR or such other person.

Approval of Payments:

14.4 The OWNER will, within ten days after receipt of each partial payment estimate, either indicate in writing his approval of payment or return the partial estimate to the CONTRACTOR indicating in writing his reasons for refusing to approve payment. In the latter case, the CONTRACTOR may make the necessary corrections and resubmit the partial payment estimate. As a prerequisite for monthly payments, construction schedules

shall be prepared and maintained by the Contractor, shall be revised and updated on a monthly basis, and a copy submitted to the Owner. Contractor’s schedules shall meet requirements per specification Section 01300, Submittals. The OWNER will, within 30 days of presentation to him of an approved partial payment estimate and updated schedule, pay the CONTRACTOR a progress payment on the basis of the approved

partial payment estimate less the retainage.

14.5 The OWNER 's approval of any payment requested in an application for payment shall constitute a representation by the OWNER, based on the on-site observations of the Work in progress as an experienced and qualified design professional and on his review of the application for payment and the supporting data, that the Work has progressed to the point indicated, that, to the best of his knowledge, information and belief, the quality of the Work

is in accordance with the Contract Documents (subject to an evaluation of the Work as a functioning project upon substantial completion, to the results of any subsequent tests called for in the Contract Documents and any qualifications stated in his approval), and that the CONTRACTOR is entitled to the payment of the amount approved. However, by approving any such payment the OWNER shall not thereby be deemed to have

represented that he made exhaustive or continuous on-site inspections to check the quality or the quantity of the Work, or that he has reviewed the means, methods, techniques, sequences, and procedures of construction or that he has made any

06/05/26 00700-30 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project examination to ascertain how or for what purpose the CONTRACTOR has used the moneys paid or to be paid to him on account of the Contract Price.

14.6 The OWNER's approval of final payment shall constitute an additional representation by him that the conditions precedent to the CONTRACTOR's being entitled to final payment as set forth in paragraph 14.13 have been fulfilled.

14.7 The OWNER may refuse to approve the whole or any part of any payment, if, in his opinion, he is unable to reach such conclusions. He may also refuse to approve any such payment, or, because of subsequently discovered evidence or the results of subsequent inspections or tests, nullify any such payment previously approved, to such extent as may be necessary in his opinion to protect the OWNER from loss because:

14.7.1 the Work is defective, 14.7.2 claims have been filed by Subcontractor, vendors or material suppliers, or there is reasonable evidence indicating the probable filing thereof, 14.7.3 the Contract Price has been reduced because of Modifications, 14.7.4 the OWNER has been required to correct defective Work or complete the Work in accordance with paragraph 13.11, 14.7.5 of unsatisfactory prosecution of the Work, including failure to cleanup as

required by paragraph 6.23.

Substantial Completion:

14.8 When the CONTRACTOR considers the entire Work ready for its intended use the CONTRACTOR shall, in writing to the OWNER certify that the entire Work is substantially complete and request the initiation of the Reliability Testing noted in 01000 Section 8.15. Within fifteen days thereafter the OWNER and the CONTRACTOR and the ENGINEER shall make an inspection of the Work to determine the status of completion.

The results of the Reliability Testing, and other inspections, will determine if the OWNER will issue a certificate of Substantial Completion. If the OWNER does not consider the Work substantially complete, the OWNER will notify the CONTRACTOR in writing giving his reasons therefor. If the OWNER considers the Work substantially complete, the OWNER will prepare and deliver to the CONTRACTOR a certificate of Substantial

Completion which shall fix the date of Substantial Completion. There shall be attached to the certificate a detailed list of each and every uncompleted item and a reasonable cost of completion.

At the time of delivery of the certificate of Substantial Completion the OWNER will deliver to the CONTRACTOR a written recommendation as to division of responsibilities pending

06/05/26 00700-31 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project final payment between the OWNER and the CONTRACTOR.

Within thirty days following the date of Substantial Completion the OWNER shall pay the CONTRACTOR in full less only two times such amount as is required to complete any then remaining uncompleted items on the list attached to the certificate of Substantial Completion and less half of the total retainage.

14.9 OWNER shall have the right to exclude the CONTRACTOR from the Work after the date of Substantial Completion, but the OWNER shall allow the CONTRACTOR reasonable access to complete or correct items on the list.

Partial Utilization:

14.10 Prior to final payment, the OWNER may request the CONTRACTOR in writing to permit him to use a specified part of the Project which he believes he may use without significant interference with construction of the other parts of the Project. If the CONTRACTOR agrees, he will certify to the OWNER and ENGINEER that said part of the Project is substantially complete and request the ENGINEER to issue a certificate of Substantial

Completion for that part of the Project. Within a reasonable time thereafter the OWNER, the CONTRACTOR and the ENGINEER will make an inspection of that part of the Project to determine its status of completion. If the ENGINEER does not consider that it is substantially complete, he will notify the OWNER and the CONTRACTOR in writing giving his reasons therefor. If the ENGINEER considers that part of the Project to be

substantially complete, he will execute and deliver to the OWNER and the CONTRACTOR a certificate to that effect, fixing the date of Substantial Completion as to that part of the Project, attaching thereto a tentative list of items to be completed or corrected before final payment and fixing the responsibility between the OWNER and the CONTRACTOR for maintenance, and utilities as to that part of the Project. The OWNER shall have the right

to exclude the CONTRACTOR from any part of the Project which the ENGINEER has so certified to be substantially complete, but the OWNER will allow the CONTRACTOR reasonable access to complete or correct items on the tentative list.

Final Inspection:

14.11 Upon written notice from the CONTRACTOR that the Project is complete, the ENGINEER will make a final inspection with the OWNER and the CONTRACTOR and will notify the CONTRACTOR in writing of any particulars in which this inspection reveals that the Work is defective. The CONTRACTOR shall immediately make such corrections as are necessary to remedy such defects. The ENGINEER or OWNER will conduct a second

inspection to determine whether all corrections identified during the initial final inspection have been completed.

Final Application for Payment:

06/05/26 00700-32 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project 14.12 After the CONTRACTOR has completed any such corrections to the satisfaction of the ENGINEER or OWNER and delivered all maintenance and operation instructions, schedules, guarantees, bonds, certificates of inspection and other documents, all as required by the Contract Documents, he may make application for final payment following

the procedure for progress payments. The final application for payment shall be accompanied by such supporting data as the OWNER may require, together with complete and legally effective releases or waivers, satisfactory to the OWNER, of all liens arising out of the Contract Documents and the labor and services performed and the material and equipment furnished thereunder. In lieu thereof and as approved by the

OWNER, the CONTRACTOR may furnish receipts or releases in full, an affidavit of the CONTRACTOR that the releases and receipts include all labor, services, material and equipment for which a lien could be filed, and that all payrolls, material and equipment bills, and other indebtedness connected with the Work for which the OWNER or his property might in any way be responsible, have been paid or otherwise satisfied, and

consent of the Surety, if any, to final payment. If any Subcontractor or supplier fails to furnish a release or receipt in full, the CONTRACTOR may furnish a bond satisfactory to the OWNER to indemnify him against any lien.

14.12.1 CONTRACTOR’s attention is also directed to Section 01700 as it regards approved as-builts.

14.12.2 The execution of a final reconciliation change order, reflecting all actual units and contingent quantities used in the work, shall be a pre-requisite of Final Payment.

Approval of Final Payment:

14.13 If, on the basis of his observation and review of the Work during construction, his final inspection and his review of the final application for payment, all as required by the Contract Documents, the ENGINEER is satisfied that the Work has been completed and the CONTRACTOR has fulfilled all of his obligations under the Contract Documents, he will, within ten days after receipt of the final application for payment, indicate in writing his

approval of payment and present the application to the OWNER for payment. Otherwise, he will return the application to the CONTRACTOR, indicating in writing his reasons for refusing to approve final payment, in which case the CONTRACTOR will make the necessary corrections and resubmit the application. The OWNER will, within thirty days of presentation to him of an approved final application for payment, pay the CONTRACTOR

the amount approved by the ENGINEER.

14.14 If, after Substantial Completion of the Work Final Completion thereof is materially delayed through no fault of the CONTRACTOR, the OWNER shall, without terminating the Agreement, make payment of the balance due for that portion of the Work fully completed and accepted. If the remaining balance of Work not fully completed or corrected is less than the retainage stipulated in the Agreement, and if bonds have been furnished as

required in paragraph 5.1, the written consent of the Surety to the payment of the balance

06/05/26 00700-33 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project due for that portion of the Work fully completed and accepted shall be submitted by the CONTRACTOR to the OWNER prior to certification of such payment. Such payment shall be made under the terms and conditions governing final payment, except that it shall not constitute a waiver of claims.

CONTRACTOR's Continuing Obligation:

14.15 The CONTRACTOR's obligation to perform the Work and complete the Project in accordance with the Contract Documents shall be absolute. Neither approval of any progress or final payment by the OWNER, nor the issuance of a certificate of Substantial Completion, nor any payment by the OWNER to the CONTRACTOR under the Contract Documents, nor any use or occupancy of the Project or any part thereof by the OWNER,

nor any act of acceptance by the OWNER nor any failure to do so, nor any correction of defective work by the OWNER shall constitute an acceptance of work not in accordance with the Contract Documents.

Waiver of Claims:

14.16 The making and acceptance of final payment shall constitute:

14.16.1 A waiver of all claims by the OWNER against the CONTRACTOR other than those arising from unsettled liens, from defective work appearing after final payment or from failure to comply with the requirements of the Contract Documents or the terms of any special guarantees specified therein, and 14.16.2 A waiver of all claims by the CONTRACTOR against the OWNER other than those previously made in writing and still unsettled.

ARTICLE 15 - SUSPENSION OF WORK AND TERMINATION

OWNER May Suspend Work:

15.1 The OWNER may, at any time and without cause, suspend the Work or any portion thereof for a period of not more than ninety days by notice in writing to the CONTRACTOR which shall fix the date on which work shall be resumed. The CONTRACTOR will resume the Work on the date so fixed. The CONTRACTOR will be allowed an increase in the Contract Price or an extension of the Contract Time, or both, directly attributable to any

suspension if he makes a claim therefor as provided in Articles 11 and 12.

OWNER May Terminate:

15.2 If the CONTRACTOR is adjudged as bankrupt or insolvent, or if he makes a general assignment for the benefit of his creditors, or if a trustee or receiver is appointed for the CONTRACTOR or for any of his property, or if he files a petition to take advantage of any

06/05/26 00700-34 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project debtor's act, or to reorganize under the bankruptcy or similar laws, or if he repeatedly fails to supply sufficient skilled workmen or suitable materials or equipment, or repeatedly fails to effect the installation within the prescribed period of time, or if he repeatedly fails to make prompt payments to Subcontractors or for labor, materials or equipment or if he

disregards laws, ordinances, rules, regulations or order of any public body having jurisdiction, or if he otherwise violates any provision of the Contract Documents, then the OWNER may, without prejudice to any other right or remedy and after giving the CONTRACTOR and his Surety seven days written notice, terminate the services of the CONTRACTOR and take possession of the Project and of all materials, equipment, tools,

construction equipment and machinery thereon owned by the CONTRACTOR, and finish the Work by whatever method he may deem expedient. In such case the CONTRACTOR shall not be entitled to receive any further payment until the Work is finished. If the unpaid balance of the Contract Price exceeds the direct and indirect costs of completing the Project, including compensation for additional professional services, such excess shall be

paid to the CONTRACTOR. If such costs exceed such unpaid balance, the CONTRACTOR will pay the difference to the OWNER. Such costs incurred by the OWNER will be determined and incorporated in a Change Order.

15.3 Where the CONTRACTOR's services have been so terminated by the OWNER, said terminations shall not affect any rights of the OWNER against the CONTRACTOR then existing or which may thereafter accrue. Any retention or payment of moneys by the OWNER due the CONTRACTOR will not release the CONTRACTOR from liability.

15.4 Upon seven days written notice to the CONTRACTOR, the OWNER, in Owner’s sole discretion, may for any reason, without cause and without prejudice to any other right or remedy, elect to terminate the Agreement. In such case, the CONTRACTOR shall be paid for all work executed and any expense sustained plus a reasonable profit for work performed up to the time of termination.

CONTRACTOR May Stop Work or Terminate:

15.5 If, through no act or fault of the CONTRACTOR, the Work is suspended for a period of more than ninety days by the OWNER or under an order of court or other public authority, or the OWNER fails to act on any application for payment within thirty days after it is submitted, or the OWNER fails to pay the CONTRACTOR any sum awarded by arbitrators within thirty days of its approval and presentation, then the CONTRACTOR may, upon

seven days written notice to the OWNER terminate the Agreement and recover from the OWNER payment for all work performed up to the time of termination and any expense sustained plus a reasonable profit. In addition and in lieu of terminating the Agreement, if the OWNER has failed to act on an application for payment or the OWNER has failed to make any payment as aforesaid, the CONTRACTOR may upon seven days notice to the

OWNER stop the Work until he has been paid for all work performed up to the time of termination.

06/05/26 00700-35 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project

ARTICLE 16 - ARBITRATION

16.1 All claims, disputes and other matters in question between OWNER and CONTRACTOR arising out of, or relating to, the Contract Documents or the breach thereof (except for claims which have been waived by the making or acceptance of final payment as provided by paragraph 14.16) will be decided by mutual agreement by arbitration in accordance with the Construction Industry Arbitration Rules of the American Arbitration Association

then obtaining, subject to the limitations of this Article 16. This agreement so to arbitrate and any other agreement or consent to arbitrate entered into accordance herewith as provided in this Article 16 will be specifically enforceable under the prevailing law of any court having jurisdiction.

16.1.1 Arbitration hearings shall be held in the county in which the Project is located.

16.2 Notice of the demand for arbitration shall be filed in writing with the other party to the Agreement and with the American Arbitration Association. The demand for arbitration shall be made within the 30-day period specified in paragraph 9.10 where applicable, and in all other cases within a reasonable time after the claim, dispute or other matter in question has arisen, and in no event shall it be made after institution of legal or equitable

proceedings based on such claim, dispute or other matter in question would be barred by the applicable statute of limitations.

16.3 The CONTRACTOR will carry on the Work and maintain the progress schedule during any arbitration proceedings, unless otherwise agreed by him and the OWNER in writing.

ARTICLE 17 - ASSIGNMENT OF CONTRACT

17.1 The CONTRACTOR shall not assign the Contract or sublet it as a whole without the written permission of the OWNER, nor shall the CONTRACTOR assign any moneys due to him under the Contract, except to a bank or financial institution acceptable to the OWNER, and then only upon the granting by the OWNER of written permission so to do.

ARTICLE 18 - REMOVAL OF EQUIPMENT

18.1 In the case of termination of this Contract, before completion, from any cause whatever, the CONTRACTOR, if notified to do so by the OWNER, shall promptly remove any part or all of his equipment and supplies from the property of the OWNER, failing which the OWNER shall have the right to remove such equipment and supplies at the expense of the CONTRACTOR.

ARTICLE 19 - MISCELLANEOUS

19.1 Whenever any provision of the Contract Documents requires the giving of written notice, it shall be deemed to have been validly given if delivered in person to the individual or to a

06/05/26 00700-36 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project member of the firm or to an officer of the corporation for whom it is intended, or if delivered at or sent by registered or certified mail, postage prepaid, to the last business address known to him who gives the notice.

19.2 All Specifications, Drawings and copies thereof furnished by the OWNER shall remain his property. They shall not be used on another project, and with the exception of those sets which have been signed in connection with the execution of the Agreement, shall be returned to him on request upon completion of the Project.

19.3 The duties and obligations imposed by these General Conditions and the rights and remedies available hereunder, and, in particular but without limitation, the warranties, guarantees and obligations imposed upon the CONTRACTOR by paragraphs 13.1, 13.9 and 14.3 and the rights and remedies available to the OWNER and ENGINEER thereunder, shall be in addition to and not a limitation of any otherwise imposed or

available by law, by special guarantee or other provisions of the Contract Documents.

19.4 Should the OWNER or the CONTRACTOR suffer injury or damage to its person or property because of any error, omission or act of the other or of any of his employees or agents or others for whose acts he is legally liable, claim shall be made in writing to the other party within a reasonable time of the first observance of such injury or damage.

19.5 The Contract Documents shall be governed by the law of the place of the Project.

END OF SECTION

06/05/26 00700-37 GENERAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project

SUPPLEMENTAL CONDITIONS

These Supplemental Conditions are hereby made a part of this Contract. In case of conflict with other portions of the Project Manual, the Supplemental Conditions shall govern.

ARTICLE 1 – DEFINITIONS – Not Used

ARTICLE 2 - EXISTING STRUCTURES AND UTILITIES

2.01 The Contract Drawings show certain information concerning existing above and below ground structures and utilities including pipe, electrical cable, etc., which are existing or are proposed to be constructed by others within the limits of the work, or in close proximity to the work. The OWNER expressly disclaims any responsibility for the accuracy or completeness of said information, and CONTRACTOR will not be entitled to

any extra compensation on account of the inaccuracy or incompleteness of such information, such information being shown only for the convenience of CONTRACTOR.

2.02 CONTRACTOR is hereby informed that the Public Utilities listed below are known to have installations in the area of this Contract (there is no natural gas):

2.02.1 Delmarva Electric Company – Power – Underground 2.02.2 Verizon Company – Phone – Underground 2.02.3 Atlantic Broadband – Fiber Optic – Underground 2.03 If CONTRACTOR, in preparing or submitting his Bid relies on subsurface information shown in the Contract Documents, he does so at his own risk. CONTRACTOR must verify the information given to his own satisfaction and shall be fully responsible for

determining in the field the exact location of all such underground structures and utilities by means of test pits or other approved methods, and protecting them from damage, whether such structures and utilities are or are not shown on the Contract Drawings.

2.04 CONTRACTOR shall perform miscellaneous excavation work as necessary to perform his work. Miscellaneous excavation shall include the digging of test pits to locate underground utilities, piping, and associated items, or excavation for any special structure, outside the normal structural excavation. Test pits shall be dug by CONTRACTOR at CONTRACTOR’s expense along the lines of the proposed work as

shown on the Contract Drawings, in advance of the excavation, for the purpose of satisfying himself as to the location of underground obstructions or conditions. Additional test pits shall be dug by CONTRACTOR as requested by the OWNER, wherever directed, along the line of the proposed work or within the limits of the public right-of-way.

This additional work will be paid per the schedule of Contingent Unit Prices in the Proposal.

2.05 Appendix B – ‘As-Builts’ – Appendix B contain drawings of the current facility and are labeled as ‘as-built’. However, a dispute between the Town of Sudlersville and the Contractor at the end of the job resulted in the Contractor not fully completing the job or

06/08/26 00800-1 SUPPLEMENTAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project submitting the typically required ‘close-out’ documents. As such the accuracy and completeness of the ‘as-builts’ is called into question and the CONTRACTOR’s reliance on that information is at their own risk. (Note the OWNER had no involvement with the Town or the facility during this period so has no direct knowledge.)

ARTICLE 3 - PROTECTION OF PROPERTY, STRUCTURES & UNDERGROUND UTILITIES

3.01 CONTRACTOR shall, at his own expense, sustain in their places and protect from direct or indirect injury, all pipes, poles, utilities, walls, buildings, and other structures or property in the vicinity of his work, whether above or below the ground, or that may appear as hereinafter specified. CONTRACTOR shall at all times provide means to protect utilities at the Site and shall use them as necessary for sheeting his excavations and for sustaining

or supporting any structures that are uncovered, undermined, endangered, threatened, or weakened. CONTRACTOR shall take all risks attending the presence of proximity of pipes, poles, utilities, walls, buildings, and other structures and property of every kind and description or in the vicinity of his work whether above or below the ground and he shall be responsible for all damage and assume all expenses for direct or indirect injury,

caused by his work, to any item, person, or property by reason of injury to an item whether such structures are or are not shown on the Contract Drawings. CONTRACTOR shall have no claim for tunneling in the vicinity of poles, storm drains, underground utilities, buildings, curbs, sidewalks, or other structures or property in the vicinity of his work.

3.02 CONTRACTOR shall protect and/or support all existing utilities that are endangered by his operations and the cost therefore shall be included in the Bid.

ARTICLE 4 - SUBSURFACE CONDITIONS

4.01 Appendix A - A sub-surface investigation was completed at the Project Site by Hillis- Carnes Engineering Consultants, Inc. The soil boring information is included in Appendix A. Such boring results are only made available in order that CONTRACTOR may have access to the same information available to the OWNER. Any deduction, interpretation, or conclusion drawn therefrom by CONTRACTOR during the bid process as to the subsurface or latent physical conditions will be entirely at the risk of CONTRACTOR and is

not the responsibility of the OWNER.

ARTICLE 5 – STORAGE AND PARKING

5.01 Materials shall be stored to assure preservation of their quality and acceptability for the work. Stored materials, even though approved before storage, may again be inspected before their use. Stored materials shall be located to facilitate prompt inspection.

CONTRACTOR shall provide all off-site parking if necessary and secure storage if necessary, as required for the prosecution of the work at no additional cost to owner.

CONTRACTOR shall be allowed to store any material on site at any time throughout the duration of the contract. The CONTRACTOR is responsible for acquiring off-site storage if

06/08/26 00800-2 SUPPLEMENTAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project necessary and coordinating delivery of materials to site no more than 12 hours in advance of installation. Store and protect in accordance with manufacturer's instructions, with seals and labels intact and legible.

5.02 Any sites used for temporary parking and/or temporary storage shall be restored to their original condition to the satisfaction of the OWNER at no expense to the OWNER.

5.03 Vehicular access to the leased tower area on the adjacent lagoon lands is to be maintained at all times for the duration of the project.

ARTICLE 6 - DISPOSAL OF CLEAN SPOIL

6.01 The OWNER will provide an area for the proper disposal of clean spoil generated during the work at its Church Hill solid waste transfer station located at 110 Price Station Road, Church Hill (approximately 12 miles one way from site) should the contractor desire to use it. Note the site is only open on Thursdays. CONTRACTOR shall notify the Resident Project Representative of his intent to utilize the site one week in advance in

order to notify the transfer station on-site attendants.

6.02 Should the CONTRACTOR desire to use it, he will be responsible for developing and implementing all sediment and erosion control plans and any necessary permits.

6.03 In using this site, CONTRACTOR agrees to comply with the sediment control plan and all directives issued by the MDE sediment control inspector at no cost to the OWNER.

6.04 OWNER will be the sole judge of what constitutes ‘clean spoil’. OWNER reserves the right to refuse to allow disposal of any material to which there is a reasonable objection such as, but not limited to, trash contamination, excessive vegetative material, etc.

6.05 Neither paving nor concrete rubble may be permanently disposed of at this site.

6.07 OWNER makes no representation as to how much spoil can be stored permanently at this site. It is the CONTRACTOR's responsibility to utilize his equipment to maximize the storage capacity of the site.

END OF SECTION

06/08/26 00800-3 SUPPLEMENTAL CONDITIONS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project

SECTION 00900

GENERAL REQUIREMENTS

PART 1 – GENERAL

1.01 CONTRACT DOCUMENTS

A. The Contract Documents which comprise the entire agreement between OWNER and CONTRACTOR consist of the following:

1. Agreement

2. Performance, Payment and Other Bonds

3. General Conditions

4. Supplemental Conditions

5. Other portions of the Project Manual, entitled “Contract No. SAN 26-01 –

Sudlersville Wastewater Treatment Plant ENR Improvement Project”, with a Project Manual dated June 2026, not specifically mentioned above including the specifications, funding agency inserts, and permits.

6. Drawings consisting of plans and profiles entitled “Sudlersville WWTP

Improvements” consisting of a cover sheet and sheets numbered G-1, through DTLS-5 inclusive, total of 40 sheets, dated June 2026 prepared by McCrone, Inc.

7. Addenda

8. CONTRACTOR's Bid

9. Documentation submitted by CONTRACTOR prior to Notice of Award

10. Any Modification, including Change Orders, duly delivered after execution of

Agreement There are no Contract Documents other than those listed above. The Contract Documents may only be altered, amended or repealed by a Modification (as defined in Article 1 of the General Conditions).

1.02 GENERAL

A. The work week will be restricted to Monday through Friday between 8 a.m. and 5 p.m. and will not exceed 40 hours, or extend beyond the above timeframe, without prior approval.

B. The CONTRACTOR shall provide all materials, labor, equipment, and services necessary for furnishing and installing all lines, sewer appurtenances, dimensions, grades, elevations and types as shown on the approved contract drawings or as directed by the OWNER.

C. The CONTRACTOR shall submit to the OWNER samples of the various types of materials that are proposed for use in construction of the above-mentioned work.

06/05/26 00900-1 GENERAL REQUIREMENTS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project These samples must be approved by both parties prior to the initiation of work.

During the progress of the work, the OWNER may require that a sufficient number of samples be tested to ascertain the size, type and quality of the actual materials that are being used in construction. The costs of such sampling shall be borne by the CONTRACTOR. Two calendar weeks are to be considered the normal turnover times for each agency's review.

D. ‘American Iron & Steel’ (AIS) provisions. – not applicable to this contract E. All materials to be used shall be stored in an approved manner that will protect them from harmful exposure to the elements and the hazards of construction procedures.

F. As-built drawings shall be the CONTRACTOR's responsibility. During the progress of the work, the CONTRACTOR shall maintain an accurate record of the locations of the piping with reference to job base lines, grades, and elevations. Show all changes made in the piping installation from the layout and/or materials shown on the approved plans or shop drawings. One set of complete as-builts shall be

submitted to the OWNER prior to final acceptance of the project. Refer to Section 01700 for further details.

G. Maintenance of Traffic – not applicable to this contract aside from that listed in the Supplemental Conditions.

1.03 SUMMARY OF WORK

A. The overall project is to enhance the plant’s denitrification processes which are currently inadequate to reliably meet total Nitrogen permit standards. The work consists of the rehabilitation of the existing Biolac reactor via the removal of accumulated sludge and the full replacement of the air diffusers, replacing and enhancing the current chemical feed delivery system, the construction of a cast-inplace concrete Post Anoxic Reactor tank, and associated electrical, monitoring, and

system control facilities.

1.04 REFERENCED STANDARDS AND SPECIFICATIONS

A. Where standards, codes or specifications are referred to, the reference is to particular standards, codes or specifications together with all of the latest amendments and errata applicable at the time the bids are taken. The specific codes referred to within these specifications are as follows:

ANSI (American National Standards Institute) ASTM (American Society of Testing and Materials)

06/05/26 00900-2 GENERAL REQUIREMENTS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project AWWA (American Water Works Association) SCS (USDA Soil Conservation Service)

1.05 GUARANTEES AND CERTIFICATES

A. During the course of the Work and within 6 weeks after approval of Shop Drawings, CONTRACTOR shall collect and assemble 5 copies each of the guarantees, manufacturers' specification sheets and/or working drawings, parts lists including exploded views, recommended safety procedures, and recommended list of spare parts. Submit all copies, with an itemized listing, to the OWNER in accordance with Sections 01300 and 01700.

1.06 ADDITIONAL COSTS RESULTING FROM SUBSTITUTE MATERIAL OR EQUIPMENT

A. Comply with Article 6.7 of the General Conditions regarding substitute material or equipment. Additional costs resulting from installation of approved substitute material or equipment including alterations in connecting piping or conduit, changes or alteration to foundations, anchor bolts, control systems, or other additional costs, including any necessary re-ENGINEERing (if any), attributed to use of the

substitute material or equipment shall be the sole responsibility of the CONTRACTOR.

1.07 SCHEDULES – refer to Section 01300

1.08 PERMITS

A. The CONTRACTOR shall obtain and pay for all permits, certificates of inspection, etc., not previously obtained by the OWNER during the normal project review stages of the project. Permits, certificates of inspection, etc., pertinent to the CONTRACTOR's phase which are required for the actual construction by authorities having jurisdiction over this work shall be delivered to the OWNER before the date of final acceptance of the job.

B. Permits obtained, or to be obtained, by OWNER:

a. MDE Construction Permit b. MDE Teir II Waters Antidegradation (Waived) c. Queen Anne’s County Soil Conservation Approval d. Queen Anne’s County Sediment Control Permit e. Town of Sudlersville’s Building Permit C. Permits to be obtained by CONTRACTOR (not intended to be all inclusive):

a. Zoning Permit (for CONTRACTOR’s construction trailer, if any)

06/05/26 00900-3 GENERAL REQUIREMENTS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project b. De-watering permit (if any) c. Sediment & Erosion Control (for lay-down yards, etc.) d. Electrical Permit e. Plumbing Permit f. Other permits as required for the execution of the Work

PART 2 - EXECUTION

2.01 PROCEDURE

A. Confer and verify with other CONTRACTORs as to locations and extent of their work, to the end that interferences and deletions between trades are prevented and embedded or required items are installed in conjunction with the work under this contract. Interconnections between work of other contracts shall be made by the CONTRACTOR whose work is erected last unless otherwise specifically stated in

the Contract Documents, required by the OWNER or necessitated by the nature or extent of the work.

2.02 WORK SEQUENCE – Refer to Section 01000 – 8.0

2.03 CONTRACTOR'S USE OF PREMISES

A. Confine construction equipment and operations of workmen to within the site.

2.04 CLEANING UP

A. Continuously keep rights-of-way, storage areas, streets, roads, highways and adjacent properties free from accumulations of waste materials, excess excavation, rubbish and windblown debris resulting from construction operations.

B. Where daily work is in progress, daily broom or water clean paved surfaces and remove surplus materials, tools, construction equipment and machinery as each work area is completed. Provide for maintenance of traffic aggregates during the entire construction period prior to permanent paving. All trenches and excavations are to be restored with CR-6 each Friday until permanent paving is in place.

2.05 INITIAL OPERATION - refer to Section 01650

2.06 UNDERGROUND EXPLORATION FOR UTILITIES

A. No underground exploration of utilities will be made for this project prior to the initiation of construction.

B. The CONTRACTOR shall notify Miss Utility three working days prior to any excavation (1-800-257-7777) as well as any other local utilities not registered with

06/05/26 00900-4 GENERAL REQUIREMENTS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project Miss Utility.

C. The CONTRACTOR shall make whatever exploration he deems necessary to determine the actual conditions and locations of underground utilities. "TEST PIT IF IN DOUBT".

D. The CONTRACTOR shall be solely responsible for all damage to any marked underground or above ground utilities encountered in any manner during construction and will make immediate repairs to said damaged utilities.

E. The CONTRACTOR shall notify the Queen Anne's County Department of Public Works in writing for permission 3 days prior to excavating for location of existing utilities. Inspector required during digging.

2.07 EXISTING UTILITIES

A. The CONTRACTOR shall be required, at his own expense, to protect, support and sustain all sewer, water or gas pipes, service pipes, electric lights, power, telephone poles, conduits, wires or cables, and other fixtures laid across or along the site of the Work. The OWNER as well as the Company or Corporation owning said facilities must be notified by the CONTRACTOR before any such facilities are removed or damaged. In case any of the said facilities are

damaged, they shall be repaired by the authorities having control of the same, and the expense of said repairs shall be paid by the CONTRACTOR or deducted from the monies which are due or to become due to said CONTRACTOR under this contract.

B. Should it become necessary to change the position or temporarily remove any such facilities in order to permit the CONTRACTOR to use a particular method of construction, the CONTRACTOR shall notify the OWNER of the location and circumstances, and shall cease work if necessary, until satisfactory arrangements have been made by the OWNER's of the said facilities to properly care for the same. No claims for damages will be allowed on account of any

delay occasioned thereby. The entire cost of the changes or temporarily removal must be included in the prices bid in the Proposal for the various classifications of work.

C. If so ordered in writing by the OWNER, the CONTRACTOR shall make permanent changes in the location of water mains and sewers if they are obstructing the new Work to be built.

PART 3 - SPECIAL REQUIREMENTS

3.01 PROJECTS COORDINATION

06/05/26 00900-5 GENERAL REQUIREMENTS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project A. Site is an active wastewater treatment facility. Construction activiates shall not interfere with these activities without 7 days prior notice.

3.02 SPARE PARTS

A. The CONTRACTOR shall furnish the spare parts listed below for the sewer system.

All costs associated with this shall be considered to be included in the lump sum bid for mobilization.

3.04 LEGAL HOLIDAYS

A. The CONTRACTOR shall not carry on regular construction activities on Saturdays, Sundays, or legal holidays recognized by the OWNER without the written authorization of the OWNER. Requests for working on Saturdays, Sundays, or legal holidays shall be submitted to the OWNER at least seven (7) full days in advance.

B. The following shall be legal holidays:

a. New Year's Day b. Memorial Day c. Independence Day d. Labor Day e. Thanksgiving Day f. Day After Thanksgiving g. Christmas Day C. If the CONTRACTOR is approved to work on these holidays, he will pay the applicable holiday wage rate of $50/hour per inspector for inspection.

3.05 WEEKLY PAYROLL INFORMATION - refer to 00450-3

3.06 OVERTIME WORK

A. The CONTRACTOR shall not schedule or carry out regular construction activities to result in a weekly work schedule in excess of 40 hours without the written authorization of the OWNER. Requests for a work period in excess of 40 hours per week should be submitted to the OWNER at least two (2) full days in advance of the start of the workweek.

B. The CONTRACTOR shall reimburse the OWNER for the added costs of inspection services and any other costs incurred by the OWNER as the result of an overtime work schedule of the CONTRACTOR. The rate of overtime for inspection services is $50 per hour per inspector.

06/05/26 00900-6 GENERAL REQUIREMENTS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project C. If and when the OWNER orders the CONTRACTOR to perform work included in the contract outside of regular working hours for the purposes not covered by the contract, the CONTRACTOR shall be paid an extra to the contract price. The payment for such overtime ordered by the OWNER shall be the applicable rate for overtime hours, minus the applicable rate for straight time hours. The

CONTRACTOR shall not be entitled to extra compensation for overtime necessary to meet the Construction Schedule of Completion.

3.07 AS-BUILTS OF SERVICE LATERALS – not used

3.08 LOCATION AND BOUNDARIES OF WORK

A. The OWNER shall provide land for the work specified in these Contract Documents and shall provide suitable provisions for ingress and egress. The CONTRACTOR shall not enter on or occupy with men, tools, equipment, or materials any ground outside the property or right-of-way of the OWNER without the written consent of the OWNER of any such ground. Other CONTRACTORs and employees or agents of the OWNER may, for all necessary purposes, enter upon the work and

premises used by the CONTRACTOR and the CONTRACTOR shall conduct his work so as not to impede unnecessarily any work being done by others on or adjacent to the site.

B. The work shall be constructed in the location shown on the Drawings with the exception that the OWNER may minimize the areas of disturbance provided any such relocations do not interfere with the CONTRACTOR's progress.

D. The CONTRACTOR shall construct the work in the location shown on the Contract Drawings with the exception of a conflict with existing utilities. The CONTRACTOR shall locate said existing utilities, avoid and repair same upon impact with construction activities at no additional cost to the OWNER.

3.09 SHOP DRAWINGS – refer to Section 01300

3.10 EQUIPMENT AND INSTALLATION

A. Every item of equipment, unless otherwise specifically approved by the OWNER, shall be the product of a domestic manufacturer experienced in the design, construction and operation of equipment for the purpose required, and who shall have furnished such equipment long enough to be able to show a record of successful operation.

B. Ample room for erecting, repairing, inspecting, adjusting and operating all equipment and machinery shall be provided. The design, construction, and installation of all equipment and machinery shall conform to and comply with the

06/05/26 00900-7 GENERAL REQUIREMENTS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project latest safety and building codes and regulations.

C. Inasmuch as the drawings are generally diagrammatical and are drawn to a small scale, it is not possible to indicate on the drawings all fittings or offsets in piping, or all valves, traps or other specialties required. Where field conditions necessitate a rearrangement, the CONTRACTOR shall prepare, and submit for approval, drawings of the proposed rearrangement. The CONTRACTOR shall carefully

investigate all conditions affecting the various aspects of the work and shall arrange his work accordingly, furnishing such fittings, traps, valves and specialties as may be required to meet such conditions.

3.11 BORROW PITS OR WASTE AREAS

A. The CONTRACTOR's attention is directed to the fact that the approval by the Soil Conservation District for the construction of this project does not extend to off-site borrow pits, stockpile areas or waste areas. Prior to commencing any grading operations, the CONTRACTOR shall make application to, and secure a permit from, the Queen Anne's County Department of Planning and Zoning for the operation and grading of any and all borrow pits, stockpile areas or waste areas

situated in Queen Anne's County that will be used in conjunction with the project.

The permit shall include, but not be limited to, the approval of the Queen Anne's County Soil Conservation District. A copy of said permit shall be provided to the OWNER upon request.

B. In the event that the CONTRACTOR utilizes borrow pits, stockpile areas or waste areas located outside of Queen Anne's County, the location of such sites shall be designated at the time of contract award and the CONTRACTOR shall be solely responsible for complying with the applicable laws and regulations of such other county or political jurisdiction.

C. All costs associated with the creation, maintenance, and closure of all borrow pits, stockpile areas, or waste areas, will be borne by the CONTRACTOR.

3.12 DUST CONTROL

A. Where ordered by the OWNER, the CONTRACTOR shall spread calcium chloride, or use another approved method, for dust control. The material shall be supplied and stored on the project site in 100 pound bags and shall conform to the requirements of AASHTO Designation M144.

B. Calcium chloride shall be spread at approximately 2 pounds per square yard of disturbed area, if and as required and directed by the OWNER.

3.13 BASIC EROSION CONTROL

06/05/26 00900-8 GENERAL REQUIREMENTS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvement Project A. All soil erosion and sediment controls are to be installed in accordance with the regulations as set forth in the Standards and Specifications for Soil Erosion and Sediment Control in Developing Areas, U.S. Department of Agriculture, Soil Conservation Service as well as the Queen Anne's County Erosion and Sediment Control Ordinance.

B. In order to minimize transport of earth materials into natural water courses during construction of the project, the CONTRACTOR shall undertake any or all of the following measures as directed by the OWNER or a representative of the Department of the Environment's Enforcement Division.

1. Provide temporary stone check dams (3/4" washed gravel) when pumping

water from the trenches. All de-watering shall be via a silt bag or other approved method.

2. Remove existing natural or man made earth cover only when actually ready

to begin and complete the work requiring it.

3. Replace or provide new, natural, or man made cover immediately after

completing work requiring it.

4. All temporary stockpile areas shall be protected by silt fence.

5. Major outfall areas shall be protected by stone check dams prior to initiating

excavation activities as shown on the Contract Drawings.

3.14 MAINTENANCE OF TRAFFIC

A. Access to and from the wastewater treatment plant is to be maintained at all times.

3.15 TESTING

A. The OWNER will pay for all on-site concrete and soil compaction testing with the exception of any retesting required due to failure of the concrete or soil compaction to meet the Contract requirements. The cost of the retesting shall be the responsibility of the CONTRACTOR.

B. All other testing required by the Contract shall be the responsibility of the CONTRACTOR.

3.16 SEWER SYSTEM START-UP AND OPERATION BY CONTRACTOR – refer to Section 01650

END OF SECTION

06/05/26 00900-9 GENERAL REQUIREMENTS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 00950 - MEASUREMENT AND PAYMENT

PART 1 - GENERAL

1.01 MEASUREMENT OF QUANTITIES

A. All work completed under the Contract shall be measured by the Owner’s agents according to the standards of weights and measures recognized by the U.S.

Bureau of Standards and in the units corresponding to those bid items as presented on the bid form.

B. The method of measurement and computations to be used in determination of quantities of material furnished and of work performed under the Contract will be those methods generally recognized as conforming to good engineering practice.

C. Unless otherwise specified, measurements for area computations will be made on the surface. Pay measurements for area computations will not exceed the neat dimensions shown on the Contract Drawings, unless otherwise ordered in writing by the Owner.

D. Structures will be measured according to neat lines shown on the Contract Drawings or as altered to fit field conditions. No payment will be made for length, width, or depth, in excess of that shown on the Contract Drawings or specified in the Specifications for any construction, unless otherwise approved by the Owner in writing.

E. All items which are measured by the linear foot, such as pipe, will be measured parallel to the base or foundation upon which such structures are placed (i.e. from station to station), unless otherwise shown on the Contract Drawings or specified.

F. In computing volumes of excavation, the average end area method, based on horizontal measurements, or other acceptable methods, will be used.

G. The term "each", when used as an item of payment, will mean complete payment for the Work described in the Contract.

H. The term "lump sum", when used as an item of payment, will mean complete payment for the Work described in the Contract, including all necessary fittings and accessories.

I. The term "complete in place", means the completion of the Contract item or portions thereof as determined by the Owner including the furnishing of all materials, equipment, tools, labor, and work incident thereto, unless otherwise specified.

06/05/26 00950-1 MEASUREMENT & PAYMENT

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

1.02 SCOPE OF PAYMENT

A. The Contractor will receive and accept compensation provided for in the Contract as full payment for furnishing all materials, labor, tools, and equipment and for performing all Work under the Contract in a complete and acceptable manner and for all risk, loss, damage, or expense of whatever character arising out of the nature of the Work or the prosecution thereof, subject to the provisions of the General and

Supplemental Conditions.

B. If any unit price in the Bid Schedule requires that the said unit price cover and be considered compensation for certain work or material essential to the item, this same work or material will not also be measured or paid for under any other pay item which may appear elsewhere in the Specifications.

PART 2 - GENERAL

2.01 CLEARING AND GRUBBING

A. No measurement will be made.

B. No additional payment will be made. All costs for clearing and grubbing shall be included in the unit price(s) bid for pressure sewer mains and other associated items requiring excavation, backfill, and restoration.

2.02 EXCAVATION FOR STRUCTURES

A. No measurement will be made.

B. No additional payment will be made. All costs for excavation for structures will be included in the bid price for items requiring excavation.

2.03 FINISH GRADING, SEEDING

A. No measurement will be made.

B. No additional payment will be made. All costs for finish grading and seeding shall be included in the unit price(s) bid for any associated items requiring excavation, backfill, and restoration. No additional payment will be made for return trips by the Contractor for maintenance of the restoration as directed by the Owner.

2.04 CONCRETE CURB AND CONCRETE SIDEWALK

A. No measurement will be made.

B. No additional payment will be made for curb and sidewalk repair or replacement.

06/05/26 00950-2 MEASUREMENT & PAYMENT

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project All costs for repair or replacement of concrete curb and sidewalk shall be included in the unit price(s) bid for pressure sewer main work.

2.05 SEDIMENT AND EROSION CONTROL

A. No measurement will be made.

B. All costs for sediment and erosion control shall be included in the lump sum bid.

This includes temporary seeding and mulching and maintenance and replacement of control measures as required throughout the duration of the job.

2.06 EXCAVATION AND BACKFILL

A. No measurement will be made.

B. No additional payment will be made. All costs excavation and backfill will be included in the unit prices bid for items requiring excavation.

C. Backfill with select material when so directed by OWNER will be paid at the Contingent Backfill bid item price as bid.

2.07 PIPE BEDDING MATERIAL

A. No measurement will be made as no bedding is required.

B. Should situations be encountered that require bedding, item will be paid under the Contingent Excavation bid item.

2.08 PIPE FITTINGS AND COUPLINGS

A. No measurement will be made.

B. No additional payment will be made. All costs for fittings and couplings for joining pipe segments will be included in the lump sum bid.

2.09 CONTINGENT BACKFILL MATERIALS

A. Shall be measured by multiplying the actual width times the actual depth times the length of backfill where select borrow is required and approved by the Owner.

Depth shall not be greater than as measured from the bottom of the excavation (or top of the bedding – if any) to the bottom of the base course of paving restoration (if any). Widths greater than the accepted line of excavation will not be included in the measurement for payment.

B. Payment will be made at the fixed price per cubic yard for the material used as

06/05/26 00950-3 MEASUREMENT & PAYMENT

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project backfill when ordered by the Owner. No payment will be made for contingent backfill material placed as a result of native material becoming unsuitable due to acts of the Contractor.

C. Payment includes costs of disposal of all waste soil.

2.10 CONTINGENT EXCAVATION BELOW SUBGRADE AND PLACEMENT OF STONE

BEDDING

A. Shall be measured by multiplying the actual width times the actual depth times the length of the additional area excavated and replaced with stone bedding as required due to unsuitable material as ordered by the Owner. Depth shall be as measured from the top of the pipe bedding (as specified) to the bottom of the excavation. Widths greater than the accepted line of excavation will not be included in the measurement for payment.

B. Payment will be paid at the fixed unit price per cubic yard for the material removed and replaced with stone bedding when ordered by the Owner. No payment will be made for contingent excavation below subgrade and stone bedding if said excavation is a result of native subgrade becoming unsuitable due to acts of the Contractor.

C. Payment includes costs of disposal of all waste soil.

2.11 CONCRETE ENCASEMENT

A. No measurement will be made.

B. No additional payment will be made. All costs for encasement (where shown on the plans) will be included in the price bid.

2.12 PERMANENT PAVEMENT RESTORATION

A. Maximum payable pavement will be the actual squared dimensions.

B. Payable areas shall be measured by multiplying the actual width times the length.

C. There will be no payment for pavement restoration that is required, at the direction of the OWNER, for damage caused by the negligent actions of the CONTRACTOR.

D. Payment will be paid at the fixed unit price per square yard for the pavement placed.

2.13 TEST PITS, SUBSURFACE INVESTIGATIONS

06/05/26 00950-4 MEASUREMENT & PAYMENT

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project A. No measurement will be made.

B. No additional payment will be made for any test pits required on the plans. All costs for test pits and subsurface investigations will be included in the price bid unless directed to test pit by the Owner.

2.14 ADJUSTING AND REPLACING FENCES, SHRUBS, HEDGES, MAILBOXES ETC.

A. No measurement will be made.

B. No additional payment will be made. All costs for adjusting and replacing fences, etc. will be included in the price bid.

PART 3 - PAYMENT ITEMS

ITEM S-1, MOBILIZATION

A. Mobilization shall consist of initiating the Contract, and may include such portions of the following as are required at the beginning of the project: setting up the Contractor's general plant; field offices; project signs; shops; storage area; sanitary and other facilities as required by the Contract Documents (by local or state law, or by regulation); providing access to the site; obtaining necessary permits and

licenses, and payment of fees; protecting existing materials; installing sediment and erosion control measures (if not covered by a separate bid item); providing required insurance and bonds; and providing spare parts.

B. Payment for Mobilization will be made at the lump sum price bid. The lump sum price bid for mobilization shall be limited to a maximum of five (5%) percent of the total base bid.

The provisions for payment for this item supersede any provisions elsewhere in the Contract Documents for including the costs of these initial services and facilities in the various items scheduled in the bid.

C. The price bid for mobilization, less retainage, shall be payable to the Contractor in accordance with the following schedule:

1. Fifty percent (50%) of the lump sum price bid for the item "Mobilization" shall

be payable to the Contractor as part of the Contractor’s first progress payment request. This first progress payment must be of a value of at least 1% of contract, exclusive of any agreed upon payment for any stored materials. Note that a prerequisite for this payment is the submission, review, and approval of all necessary pre-construction photos.

2. The remaining fifty percent (50%) of the lump sum price bid for the item

06/05/26 00950-5 MEASUREMENT & PAYMENT

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project "Mobilization" shall be payable to the Contractor upon his successful completion of five percent (5%) of the awarded contract work. For purposes of this item, five percent (5%) of the work shall be considered completed when the total of payments earned, exclusive of the amount bid for this item and any payments for materials stored, as shown on the monthly certificates

of the quantities of work done, equals or exceeds five percent (5%).

ITEM S-2, WWTP Improvements A. This item of work shall consist of all effort and material to construction the Post Anoxic Reactor and all its ancillary components.

B. Work shall consist of, but not be limited to, sediment control, demolition of existing components, yard piping, PAR tank excavation and construction, chemical feed system, installation of probes and sensors, electrical and control system installation, etc.

C. Item also includes the existing Biolac basin renovation with the exception of any costs captured in bid item S-4.

D. Item includes Reliability Testing and any other efforts to demonstrate the facility has been constructed to plans and specifications and is functioning as intended.

E. Item does not include any required pavement restoration.

ITEM S-3, Biolac Solids Removal A. This unit of work shall consist of the cost to remove, treat, and dispose of the solids removed from the Biolac Basin and is broken into 4 bid components.

S-3a Mobilization/Demobilization i. Mobilization/Demobilization shall consist of initiating and concluding the biosolids removal and may include such portions of the following as are required at the beginning and ending of this portion of the work: organizing and moving the equipment and personnel to and from the Project Site; setting up the project trailer, generator, pumping and injection equipment, piping, weir tank and associated

valves; cleaning up the site, site restoration. and packing up all equipment.

06/05/26 00950-6 MEASUREMENT & PAYMENT

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project ii. Payment for Mobilization/Demobilization shall be on a lump sum basis.

S-3b Polymer Drums i. Measurement under this item will be made on the basis of the actual number of 55-gallon drums of polymer used to coagulate the solids removed from the Biolac.

ii. Payment for work completed under this item will be made at the fixed unit price per 55-gallon drum, or partial drum, of polymer used.

S-3c Days of Solids Removal i. Measurement under this item will be made on the basis of the actual number of calendar days of work utilizing the robotic equipment to remove the solids from the aeration basin.

ii. This item shall not be used to pay for workdays needed to remove solids identified by the post mapping activity that should have been removed during the original solids removal activity, unless approved by the Owner.

iii. Payment for work completed under this item will be made at the fixed unit price, or fraction thereof, per calendar day of Work onsite actively utilizing the robotic solids removal equipment. Whole or half-day units shall be used to determine the price per day of Work. Any workday longer than 8 hours will be billed as a whole calendar day.

a. A minimum of 4 onsite work hours is required for a half-day with a minimum of 3 hours spent actively removing, processing, or transferring solids unless excessive clogging of the equipment occurs due to debris in the aeration basin, or other reasons outside the control of the Contractor.

b. For a whole day, a minimum of 6 hours is to be spent actively removing, processing, or transferring solids unless excessive clogging of the equipment occurs due to debris in the aeration basin, or other reasons outside the control of the Contractor.

Excessive clogging is defined in Section 11350.

c. If additional days of solids removal are required, and the

06/05/26 00950-7 MEASUREMENT & PAYMENT

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project Owner approves the need and reasons for the additional days, the same unit price provided in the bid form shall be used to increase the price of the contract via a change order, following the requirement of the Contract for change orders.

S-3d Basin Mapping ii. Basin Mapping shall consist of the use of a remote operated vehicle equipped with sonar to map the solids accumulation on the floor of the Biolac aeration basin. Mapping will result in a 100+ point sedimentation map showing the depth of solids. Basin Mapping will include both pre solids removal and post solids removal mapping of the Biolac. This item shall also include any additional mapping

required should additional solids removal be required due to insufficient solids removal identified by the post-mapping of the Biolac floor.

iii. Payment for Basin Mapping shall be on a lump sum basis.

ITEM S-4, PAVING RESTORATION

A. The work under this item shall include patching existing lanes with bituminous asphalt in accordance with the appropriate detail and specification when their disturbance was unavoidable and not due to Contractor’s negligence.

B. Measurement under this item will be made on the basis of square yards placed.

C. Payment for work completed under this item will be made at the fixed unit price per square yard used for the pavement restored which shall include the proper preparation, placing, compaction, and incidentals required to complete the work.

ITEM S-5, CONTINGENT TEST PITS

A. This item of work shall consist of additional test pitting when and if directed by the Owner and only for those test pits not shown as required on the plans..

B. Measurement under this item will be made on the basis of the actual number of cubic yards excavated.

ITEM S-6, CONTINGENT NON-REINFORCED CONCRETE

A. This item of work shall consist of furnishing and placing non-reinforced concrete as ordered by the Owner at all areas of the work in addition to that shown on the

06/05/26 00950-8 MEASUREMENT & PAYMENT

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project Drawings, specified or included in other pay items.

B. Measurement under this item will be made on the basis of the actual number of cubic yards of additional unreinforced concrete poured as ordered by the Owner and measured in place.

C. Payment for work completed under this item will be made at the fixed unit price for contingent non-reinforced concrete which shall constitute full payment for all formwork, concrete, extra excavation, excavation support, dewatering, pouring, curing, stripping of forms and incidentals required to complete the work.

ITEM S-7, CONTINGENT BACKFILL WITH SELECT MATERIAL

A. The work under this item shall include providing select material fill in excavations above subgrade as ordered by the Owner. Work shown on the Drawings, specified, or included under other pay items will not be paid under this item.

B. Measurement under this item will be made on the basis of the actual depth and length as measured by the size of the excavation for a payable width as defined in

Part 2

of this section as it regards contingent items.

C. Payment for work completed under this item will be made at the fixed unit price for trench backfill with select material which shall include the furnishing, placing, compaction to specified limits, and incidentals required to complete the work.

D. Payment shall include the transport and proper disposal or storage of all rejected material unsuitable for backfill.

ITEM S-8, CONTINGENT EXCAVATION BELOW SUBGRADE AND PLACEMENT OF

STONE BEDDING

A. The work under this item shall include the excavation of unsuitable materials below subgrade in trench excavations and replacement with stone bedding as ordered by the Owner. Work shown on the Drawings, specified, or included under other pay items will not be paid under this item.

B. Measurement under this item will be made on the basis of the actual depth and length as measured by the size of the additional excavation and stone bedding for a payable width as defined in Part 2 of this section as it regards contingent items.

E. Payment for work completed under this item will be made at the fixed unit price for excavation, excavation support, dewatering, furnishing, placing, compaction and incidentals required to complete the work.

D. Payment shall include the transport and proper disposal or storage of all rejected

06/05/26 00950-9 MEASUREMENT & PAYMENT

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project material unsuitable for backfill.

ITEM S-9, CONTINGENT DUCTILE IRON FITTINGS

A. This item of work shall be to reimburse for ductile iron fittings required by realignments necessitated by field conditions and not shown on the plans.

B. Payment will be made at the fixed unit price for this item per Ton. Catalog cut sheets of the components showing each components weight will be required as documentation.

END OF SECTION

06/05/26 00950-10 MEASUREMENT & PAYMENT

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 01000

SUMMARY OF WORK

1.0 THE WORK AND ITS PERFORMANCE

1.1 CHARACTER OF THE WORK

1.1.1 Unless otherwise expressly provided in the Contract Drawings, Specifications and Addenda; the work must be performed in accordance with best modern practice, with materials and workmanship of the highest quality to the satisfaction of the Owner.

1.2 MEANS & METHODS OF CONSTRUCTION

1.2.1 Unless otherwise expressly provided in the Contract Drawings, Specifications and Addenda; the means and methods of construction shall be such as the Contractor may choose subject, however, to the Owner's right to reject means and methods proposed by the Contractor which:

1.2.1.1 Will constitute or create a hazard to the Work or to persons, or damage to property or existing utilities.

1.2.1.2 Will not produce finished work in accordance with the terms of the Contract.

1.2.1.3 The Owner's approval of the Contractor's means and methods of construction, or his failure to exercise his right to reject such means or methods; shall not relieve the Contractor of his obligation to accomplish the result intended in the Contract, nor shall the exercise of such right to reject create a cause of action for damages.

2.0 SUBSURFACE STRUCTURES & UTILITIES

2.1 Any information as to the location of existing structures and utilities both at and below ground surface on the Contract Drawings or in information provided by the Owner is not guaranteed as to accuracy or completeness. The Contractor shall make such supplemental investigations as he deems necessary and shall have no claims for damages due to encountering subsurface structures or utilities in locations other

than shown on the Contract Drawings. The utility locations, as found, shall be painted and/or staked on the surface as necessary to establish subsurface utility line locations. If the Contractor, in making up or submitting his bid, relies on said information, he does so at his own risk. The giving of this information on the Contract Drawing or by the Owner will not relieve the Contractor of his obligations to support

and protect all pipes, conduits, telephone lines, and other structures which may be met with during construction of the Work and to make good all damage to such pipes, conduits, telephone lines, and other structures, as provided, in the specifications.

2.2 The Contractor shall be responsible for contacting MISS Utility at 1-800-257-7777 to locate existing utilities. The Contractor shall have Miss Utility mark all areas where the Work is to be performed.

JUNE 2026 01000-1 SUMMARY OF WORK

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

3.0 PROTECTION OF EXISTING SUBSURFACE STRUCTURES & UTILITIES

3.1 The Contractor shall be required, at his own expense, to protect, support and sustain all sewer, water or gas pipes, service pipes, electric lights, power, telephone poles, conduits, wires or cables, and other fixtures laid across or along the site of the Work.

The Owner as well as the Company or Corporation owning said facilities must be notified by the Contractor before any such facilities are removed or damaged. In case any of the said facilities are damaged, they shall be repaired by the authorities having control of the same, and the expense of said repairs shall be paid by the Contractor or deducted from the monies which are due or to become due to said

Contractor under this contract.

3.2 Should it become necessary to change the position or temporarily remove any such facilities in order to permit the Contractor to use a particular method of construction, the Contractor shall notify the Owner of the location and circumstances, and shall cease work if necessary, until satisfactory arrangements have been made by the Owners of the said facilities to properly care for the same. No claims for damages

will be allowed on account of any delay occasioned thereby. The entire cost of the changes or temporarily removal must be included in the prices bid in the Proposal for the various classifications of work.

3.3 If so ordered in writing by the Owner, the Contractor shall make permanent changes in the location of water mains and sewers if they are obstructing the new Work to be built.

4.0 EXCAVATIONS, SAFETY BARRICADES & WATCHMEN

4.1 The attention of the Contractor is specifically directed to the exacting requirements in connection with the protection of all excavations and for the safety of all persons.

The Contractor shall be expected to keep all excavations protected at all times. All trenches, unless otherwise permitted, shall be backfilled at the end of each workday.

When permitted to leave a trench open overnight, the Contractor shall, at his own expense, provide suitable and safe means for completely covering all open excavations and for accommodating travel when work is not in progress. Contractor shall use suitable and adequate barricades and shall provide lights at night; warning signs shall be located where required.

4.2 Barricades shall be adequately braced. The use of intermittent plank barriers carried on "horses" will not be permitted. Bridges providing access to private property during construction shall be removed when no longer required. The length of open trench will be controlled by the particular surrounding conditions but shall always be confined to the limits prescribed by the Owner. If the excavation becomes a hazard

or if it excessively restricts traffic at any point, then special construction procedures shall be taken, such as limiting the length of trench. Backfilling to the surface will be required as soon as practicable. Backfilled excavations shall be maintained to grade and satisfactory conditions in accordance with the judgment of the Owner. The Contractor shall correct all settlements, holes, depressions, soft trench, etc. at the

instruction of the Owner at no extra cost to the Owner.

JUNE 2026 01000-2 SUMMARY OF WORK

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

5.0 WORKING HOURS

5.1 Work under this contract shall not be prosecuted on Saturdays, Sundays, or on State and National Holidays, except in time of emergency, and then only under written permission from the Owner, who shall be the sole judge as to the urgency of that emergency. The workday shall not begin before 7:00 A.M. and shall end prior to 5:30 P.M. unless the Contractor requests permission of the Owner to do so on a caseby-case basis. Working hours and working conditions for those days requested by

the Contractor and approved in writing by the Owner will be determined at the time of the Contractor’s request. Total normal working hours per week (Sunday to Saturday) shall not exceed forty (40) unless the Contractor requests permission of the Owner to do so on a case-by-case basis.

5.2 Should the Contractor deem it necessary to work on Saturdays, Sundays, or on State and National Holidays, or outside the hours described in the previous paragraph, in order to comply with his construction schedule or because of an emergency; the Contractor shall request permission of the Owner to do so. If, in the opinion of the Owner the need is bona fide, he will authorize, in writing, the Contractor to work such hours as may be necessary.

5.3 If the Contractor receives authorization from the Owner to work outside the scope of normal working hours, as described above, costs incurred by the Owner arising from such lengthening hours, including the furnishing inspectors, shall be the Contractor's responsibility and the cost thereof may be deducted from monies owed to the Contractor.

6.0 TRAFFIC CONTROL

6.1 Any required traffic control shall be in accordance with the State of Maryland and the Queen Anne’s County regulations.

7.0 USE OF PREMISES & REMOVAL OF DEBRIS

7.1 The Contractor expressly undertakes at his own expense:

7.1.1 To take every precaution against injuries to persons or damage to property.

7.1.2 To store his apparatus, materials, supplies and equipment in such orderly fashion at the site of the Work as will not unduly interfere with the progress of his work, or the work of any other contractors.

7.1.3 To clean up frequently all refuse, rubbish, scrap materials, and debris caused by his operations, to the end that at all times the site of the Work shall present a neat, orderly and workmanlike appearance.

7.1.4 Before final payment to remove all surplus materials, false-work, temporary structures, including foundations thereof; plant of any description and debris of every nature resulting from his operations, and to put the site in a neat, orderly condition.

JUNE 2026 01000-3 SUMMARY OF WORK

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

8.0 SEQUENCE OF CONSTRUCTION

8.1 GENERAL

8.1.1 The construction and rehabilitation of the Sudlersville WWTP ENR Improvements is suggested to proceed in the order outlined below.

Deviations from the following sequence of construction are allowable, following written approval by the Owner and/or Engineer.

8.1.2 During each stage of construction, the Contractor shall take any and all measures necessary to maintain the integrity of the existing water, sewer, and electrical facilities. Such utilities shall remain in continuous operation during construction, unless specified below. Reparations of any and all damage to the water and sewer facilities incurred during construction shall be the responsibility of the Contractor.

8.1.3 Additionally, the Contractor shall provide continuous access for operation and maintenance of the existing WWTP so as to allow continuous treatment of the wastewater during construction and testing.

8.1.4 The Contractor shall make a video recording of the existing site prior to any Work being performed. The contractor shall provide copies of the video recording to the Owner and any project stakeholder that requests a copy.

8.1.5 The Contractor shall coordinate with the County a minimum of 2 weeks in advance on any required bypass of the WWTP to the existing lagoons. There will be no more than one bypass per day and no more than two days per week. No bypass of the WWTP shall be conducted on Tuesdays or Thursdays without express written permission from the County. The maximum duration of a bypass shall be a 10-12 hour workday. If more than

10-12 hours are needed or more days per week of bypassing are needed, the Contractor shall request permission in writing from the County. Bypasses will be weather dependent.

8.2 PRE-CONSTRUCTION CONFERENCE AND SUBMITTALS

8.2.1 Prior to constructing any Work or ordering any equipment the Contractor shall conduct a pre-construction conference for the purpose of designating authorized representative, as well as establish project milestones and protocol. The pre-construction conference shall be in accordance with

Section 2.7

of the General Conditions.

8.2.2 Provide submittals for review by the Engineer. The submittals shall be prepared in accordance with Section 01300 prior to ordering or installing any equipment.

8.2.3 A preconstruction conference shall be held with any and all permitting agencies, as required by the applicable agencies and permits.

8.3 SEDIMENT AND EROSION CONTROL MEASURES

8.3.1 The Contractor shall install the necessary temporary sediment and erosion control measures.

JUNE 2026 01000-4 SUMMARY OF WORK

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

8.4 TEST PITTING

8.4.1 The Contractor shall test-pit all locations shown on the Contract Drawings to determine the exact location and elevation of existing utilities. Information gathered by the Contractor during all test-pitting operations shall be provided to the Engineer prior to further construction. The Contractor shall notify the Owner and Engineer of significant deviations between test pits and information provided in the Contract Documents. The Engineer shall notify

the Contractor of any changes to the design based on the information gathered from the test pits.

8.5 SIMULTANEOUS CONSTRUCTION ACTIVITY

8.5.1 Excavate and construct the post anoxic reactor (PAR) and blowers. Leak test the PAR tank.

8.5.2 Excavate and construct the PAR influent pipe from the proposed plug valve downstream of the existing Biolac effluent box to the PAR tank. Pressure test the pipe to the limits possible.

8.5.3 Excavate and construct the PAR effluent pipe from the PAR tank up to the point where the effluent pipe connects to the existing clarifier splitter box, but don’t make the connection to the clarifier splitter box. Pressure test pipe to the limits possible.

8.5.4 Excavate and construct the methanol chemical feed system, including the canopy.

8.5.4.1 Contractor shall completely fill the 1,000 gallon methanol feed tank with the specified chemical once the tank is fully constructed and leak tested.

8.5.5 Excavate, construct, and connect the chemical feed piping for the Biolac influent to the existing headworks building at the flow splitter box.

8.5.5.1 If, in the opinion of the Contractor, a bypass is required to make the connection of the methanol feed to the existing headworks building, the Contractor shall coordinate this bypass with the County.

8.5.6 Excavate, construct, and connect the chemical feed piping for the PAR influent channel.

8.5.7 Install radio control panels at the influent pump station as well as the existing control building so the influent pump station flow rate can be transmitted to the existing Biolac control panel.

8.5.8 Investigate and resolve the WAS control issues.

8.5.9 Install all power and controls related conduit, wires, and equipment needed for the PAR, blowers, methanol chemical feed system, RTUs, and radio control panels.

JUNE 2026 01000-5 SUMMARY OF WORK

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 8.5.10 Upgrade the MCB at the existing generator and feeders between the existing generator and the ATS.

8.5.11 Complete modifications to the Biolac PLC to add methanol feed control for Biolac influent and PAR influent to the existing control logic. Program new alarms to be transmitted from the Biolac PLC to the existing and proposed RTU.

8.5.12 Replace the existing chart recorder for the recycle pump station flow and connect it to the Biolac control panel.

8.5.13 Reroute the existing alum feed to the existing clarifier splitter box.

8.5.14 Replace the DO probe at the Biolac effluent box.

8.5.15 Demolish the existing concrete pad leftover from the decommissioned methanol storage tank, as specified in Section 02050.

8.6 CONNECTION OF THE PAR EFFLUENT TO THE EXISTING CLARIFIER

SPLITTER BOX

8.6.1 Contractor shall have the area where the connection is to be made excavated and exposed to the extent needed to install the remaining pipe needed to connect to the clarifier splitter box.

8.6.2 The Contractor shall have made field measurements to verify length of spool pieces needed.

8.6.3 The Contractor shall have all pipe materials, fittings, and equipment on hand and shall have pipe assemblies made up to the extent possible before beginning the work so as to keep the duration of the bypass as short as possible.

8.6.4 The Contractor shall coordinate with the County on an agreed upon bypass time with a maximum bypass duration of 10-12 hours.

8.6.5 The County will operate valves near the headworks building to divert flow from the WWTP to the existing lagoons.

8.6.6 Once the Biolac effluent flow stops, the Contractor is to pump out the Biolac effluent box and clarifier splitter box into the existing clarifiers, leaving the structures and connecting pipes as “dry” as possible.

8.6.7 Place inflatable plugs in the Biolac effluent box and the clarifier splitter box as additional protection from wastewater flowing to the clarifier splitter box.

8.6.8 Make connection of the PAR effluent piping to the existing clarifier splitter box as shown on the Contract Drawings.

8.6.9 Visually inspect the new pipe connection for any leaks.

8.6.9.1 Close the plug valves on the effluent side of the PAR after leak testing the PAR tank and after pressure testing the effluent pipe, to the extent possible.

JUNE 2026 01000-6 SUMMARY OF WORK

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 8.6.9.2 After the connection of the PAR effluent pipe is made to the clarifier splitter box, fill the center of the clarifier splitter box with water, up to the height of the existing weir.

8.6.9.3 Open the plug valves on the effluent end of the PAR.

8.6.9.4 The water level in the PAR will equalize to the same level as the water in the splitter box weir. This will fill the PAR effluent pipe.

8.6.9.5 Observe that there are no leaks in the PAR effluent pipe under these conditions for a minimum of 2 hours.

8.6.9.6 Once completed, if there are no visual leaks, close the plug valves on the PAR effluent so that wastewater flow does not flow from the clarifier splitter box into the PAR.

8.6.10 Contractor to backfill the pipe and remove inflatable plugs. County to operate valves near the headworks to end bypass flow to the lagoons and resume normal flow through the existing WWTP.

8.7 CONNECTION OF THE PAR INFLUENT PIPE TO THE EXISTING BIOLAC

EFFLUENT PIPE

8.7.1 Contractor shall have the area where the connection is to be made excavated and exposed to the extent needed to install the remaining PAR influent pipe needed to connect to the existing Biolac effluent piping and the additional valves and fittings being added to the Biolac effluent pipe.

8.7.2 The Contractor shall have made field measurements to verify length of spool pieces needed.

8.7.3 The Contractor shall have all pipe materials, fittings, and equipment on hand and shall have pipe assemblies made up to the extent possible before beginning the work so as to keep the duration of the bypass as short as possible.

8.7.4 The Contractor shall coordinate with the County on an agreed upon bypass day and time with a maximum bypass duration of 10-12 hours.

8.7.5 The County will operate valves near the headworks building to divert flow from the WWTP to the existing lagoons.

8.7.6 The Contractor is to pump out the Biolac effluent box and clarifier splitter box into the existing clarifiers, leaving the structures and connecting pipes as “dry” as possible.

8.7.7 Place inflatable plugs in Biolac effluent box and clarifier splitter box as additional protection from wastewater flowing through the area of work.

8.7.8 Make all required pipe connections/modifications to the Biolac effluent pipe and PAR influent pipe as shown on the Contract Drawings.

JUNE 2026 01000-7 SUMMARY OF WORK

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 8.7.9 Visually inspect the new pipe connection for any leaks.

8.7.9.1 Close the plug valve on the PAR influent pipe after leak testing the PAR tank and after pressure testing the PAR influent pipe, to the extent possible.

8.7.9.2 After the connection of the PAR Influent pipe is made to the Biolac effluent pipe and the modifications to the Biolac effluent pipe are done, remove the inflatable plug at the Biolac effluent box, fill the Biolac effluent box with water up to the height of the existing weir, open the plug valve on the PAR influent pipe, and open the new valve on the Biolac effluent pipe.

8.7.9.3 The water level in the PAR will equalize to the same level as the water in the Biolac effluent box weir. This will fill the PAR influent pipe and the Biolac effluent pipe.

8.7.9.4 Observe that there are no leaks on the installed piping under these conditions for a minimum of 2 hours.

8.7.9.5 Once completed, if there are no visual leaks, close the plug valve on the PAR influent pipe, remove the inflatable plug at the clarifier splitter box, and open the new plug valve on the existing Biolac effluent pipe so that flow continues through the existing treatment process.

8.7.10 Contractor to backfill the pipe and remove inflatable plugs. County to operate valves to end the bypass to the lagoons and resume normal flow through the existing WWTP.

8.8 RELIABILITY TESTING

8.8.1 The following prerequisites shall be met and completed prior to the start of reliability testing:

8.8.1.1 The Work shall be complete to the point where operation of the new equipment and processes do not present a danger to Contractor employees or Owner operators or anyone else.

Access to all equipment shall be provided as designed. All handrail, grating, and safety equipment shall be in place.

8.8.1.2 The Contractor shall submit manufacturers’ letters of certification regarding installation as directed in Section 01300. The letters of certification shall be included in the Operations and Maintenance manuals.

8.8.1.3 The Contractor shall preliminarily test all alarm and sensory equipment to ensure alarms are received at the PLC and called out through the SCADA system. All tests shall be done in the presence of the Owner’s representative. All alarms shall work as described in specification Section 16965 and other applicable sections prior to the reliability test or start-up.

JUNE 2026 01000-8 SUMMARY OF WORK

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 8.8.1.4 The Contractor shall preliminarily run the new equipment to ensure it will operate as described in these specifications.

8.8.2 Reliability testing shall be performed as explained in Section 01650.

8.9 REMOVE SOLIDS BUILD-UP FROM BIOLAC

8.9.1 Prior to the removal of solids from the Biolac, the following shall be completed:

8.9.1.1 Contractor shall have all materials and equipment required for diffuser replacement in hand and on site so the amount of time with inadequate mixing energy can be minimized.

8.9.1.2 Contractor shall coordinate with Parkson to schedule training on the Biolac and all associated controls. Training shall occur as close to the completion of solids removal and diffuser replacement as possible, on a fully operational WWTP.

8.9.1.3 Contractor shall coordinate with all vendors/manufacturers to schedule training on all new equipment and instrumentation.

Training shall occur on a fully operational WWTP, once the PAR has been placed online.

8.9.1.4 Contractor shall provide the County with 4-weeks’ notice of solids removal so that the County can adequately prepare the existing lagoons to receive the pumped solids that will be removed from the Biolac.

8.9.2 The Biolac shall remain in operation and aerating for the entirety of the solids removal process, with the exception of the pre and post mapping of the basin. A bypass will be required to complete the mapping.

8.9.2.1 Prior to the beginning of the solids removal, the Contractor shall map the Biolac basin to determine the starting measurements of solids in the basin. This will require a minimum 2-hour bypass of the Biolac basin.

8.9.2.2 Following the solids removal process, the Contractor shall map the Biolac basin to determine the measurements of solids remaining in the basin. This will require a minimum 2-hour bypass of the Biolac basin.

8.9.3 Use a remote operated vehicle to inspect, map, and remove the solids at the bottom of the basin.

8.9.4 Once the solids are removed, the Owner shall continue to operate the Biolac in ‘HAND’ until diffusers have been replaced.

8.10 After solids removal, the Contractor has 7 days to complete the following tasks in the order provided below.

JUNE 2026 01000-9 SUMMARY OF WORK

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 8.10.1 Replace the existing diffusers in the Biolac and optimize chain sway per Biolac recommendations and startup instructions.

8.10.1.1 No bypass is required for this Work, but the Contractor may request a bypass if deemed necessary by the Contractor. As mentioned in section 8.1.5, the bypass shall be limited to 10-12 hours and there may be no more than two bypasses per week.

8.10.2 Place the Biolac in Wave-Ox Mode.

8.10.3 Open/close the applicable plug valves so that the WWTP operates as originally designed, from the Biolac basin to the clarifier splitter box. Process water shall not flow to the PAR.

8.11 OPERATOR TRAINING

8.11.1 Operation and Maintenance manuals, including all contract documents, test reports, submittals, etc., shall be provided to the Owner prior to the start of operator training.

8.11.2 Provide operator training for the Biolac system, including operation of the updated controls logic.

8.11.3 All applicable manufacturers to lead operator training for all new equipment/instrumentation, as scheduled prior to the removal of accumulated solids.

8.12 PROJECT CLOSEOUT

8.12.1 The Contractor shall operate all new equipment by the manufacturer’s requirements and recommendations using available O&M manuals, until turned over to the County at substantial completion.

8.12.2 Project closeout, including all substantial and final completion procedures, shall be performed as explained in Section 01700.

9.0 ENUMERATION OF DRAWINGS

9.1 See cover sheet of drawings for full list of drawings.

END OF SECTION

JUNE 2026 01000-10 SUMMARY OF WORK

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 01050

FIELD ENGINEERING

1.0 SURVEYS, PERMITS & REGULATIONS

1.1 Permits and licenses of a temporary nature necessary for the prosecution of the Work such as electrical and plumbing shall be secured and paid for by the Contractor unless otherwise stated. For a full list of Contractor obtained permits, see section 1.08 of Specification 00900 General Conditions. Permits, licenses, and easements for permanent structures or permanent changes in existing facilities shall be secured and paid for by the Owner, unless

otherwise specified. The permits that the Owner is securing are:

1.1.1 Maryland Department of the Environment Construction Permit 1.1.2 Queen Anne’s County Soil Conservation Approval 1.1.3 Queen Anne’s County Grading Permit 1.1.4 Town of Sudlersville Building Permit 1.2 The Owner shall be responsible for obtaining the required permits noted above. The responsibility for obtaining permits other than those noted above shall be specified in other sections of the Contract Documents. The Contractor shall coordinate his construction

operations with the Owner to ensure that all permits have been acquired prior to commencement of construction operations. The Contractor shall be responsible for ensuring his construction activities follow the requirements of the permits listed above and permits obtained by the Contractor.

1.3 The Contractor shall give all notices and comply with all Federal, State and County laws, ordinances, rules and regulations bearing on the conduct of the Work. If the Contractor observes that the Contract Documents are at variance therewith, the Contractor shall promptly notify the Owner in writing.

2.0 ELEVATIONS

2.1 The elevations shown on the Drawings and in the Specifications were established from NAVD 1988 benchmarks. All of the Work shall be built to the lines and grades shown in the Contract Documents.

2.2 The Contractor shall employ, at his own expense, a competent civil engineer or registered land surveyor who shall stake out the various structures and other parts of the Work, establish levels, and erect the permanent batter boards. From time to time, the abovementioned civil engineer or land surveyor shall verify by instrument all reference marks, and the Contractor shall be responsible for the accuracy of all lines and levels and of the Work

as built in accordance therewith.

2.3 The Owner may check the lines, elevations, reference marks, batter boards, etc., set by the Contractor, and the Contractor shall correct any errors disclosed by such check. Such a check shall not be considered as approval of the Contractor's Work and shall not relieve the Contractor of the responsibility for accurate construction of the entire Work. The Contractor shall furnish the services of a man to help the Owner in checking lines and grades when

requested.

JUNE 2026 01050-1 FIELD ENGINEERING

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.4 The Contractor shall keep a level and transit with rod on or near the site at all times.

END OF SECTION

JUNE 2026 01050-2 FIELD ENGINEERING

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 01300

SUBMITTALS

1.0 SCHEDULES, REPORTS & RECORDS

1.1. The Contractor shall submit to the Owner such schedule of quantities and costs, progress schedules, payrolls, reports, estimates, records and other data where applicable as are required by the Contract Documents for the Work to be performed.

1.2. In accordance with the schedule contained in Section 01300, Part 5.0, the Contractor shall submit construction progress schedules showing the order in which he proposes to carry on the Work, including dates at which he will start the various parts of the Work and estimated date of completion of each part. The Project schedule shall be in accordance with the requirements of Section 01300, Part 5.0.

1.3. The Contractor shall submit a detailed Contract Bid Breakdown of the construction costs in a form acceptable to the Owner with the executed Contract. The Contract Bid Breakdown will be used for estimating the value of monthly progress payments and shall be in accordance with Part 6.0 as specified herein.

2.0 SHOP DRAWINGS

2.1 The Contractor shall submit Shop Drawings for each and every element of the Work.

The Engineer shall promptly review all Shop Drawings. The Engineer's review of submitted Shop Drawings shall be limited to general compliance with the design intent. Neither the Engineer nor the Owner shall be responsible for errors in the drawings furnished by the Contractor. The Engineer's approval of any Shop Drawing shall not release the Contractor from responsibility for deviations from the Contract

Documents. The approval of any Shop Drawing that substantially deviates from the requirements of the Contract Documents, as determined by the Engineer, shall be evidenced by a Change Order.

2.2 When submitted for review, Shop Drawings shall bear the Contractor's certification that he has reviewed, checked, and approved the Shop Drawings and that they are in conformance with the requirements of the Contract Documents.

2.3 No Work shall begin until the Shop Drawing and/or sample submission for that portion of the Work has been approved by the Engineer. A copy of each approved Shop Drawing and each approved sample shall be kept in good order by the Contractor at the site and shall be available to the Owner.

2.4 The Contractor shall submit to the Engineer an electronic PDF of all Shop Drawings/Submittals and testing results. The Engineer will make annotations directly on the PDF and return an electronic PDF to the Contractor. The Contractor shall incorporate the corrections and resubmit a corrected electronic PDF to the Engineer for approval. This procedure shall be repeated until all corrections are made to the

satisfaction of the Engineer. A final PDF will be returned to the Contractor, Owner, and Owner’s field representative.

3.0 SUBMITTALS & SUBSTITUTIONS

3.1 DESCRIPTION

JUNE 2026 01300-1 SUBMITTALS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.1.1 Work Included 3.1.1.1 Wherever possible throughout the Contract Documents the minimum acceptable quality of workmanship and materials has been defined either by Manufacturer's names and catalog numbers or by reference to recognized industry standards.

3.2 SHOP DRAWINGS/SUBMITTALS

3.2.1 Scale Required 3.2.1.1 Unless otherwise specifically directed by the Engineer, make all Shop Drawings accurately to a scale sufficiently large to show all pertinent features of the item and its method of connection to the Work.

3.2.2 Type of Print Required 3.2.2.1 Unless otherwise specifically directed by the Engineer, make all Shop Drawing prints in blue or black line on white background.

3.2.3 Number of Prints Required 3.2.3.1 Submit all Shop Drawings in the quantity as specified in paragraph 2.4.

3.3 SAMPLES

3.3.1 Accuracy of Sample 3.3.1.1 Unless otherwise specifically directed by the Engineer, all samples shall be of the precise article proposed to be furnished.

3.3.2 Number of Samples Required 3.3.2.1 Submit all samples in the quantity which is required to be returned plus three which will be retained by the Engineer Owner.

3.4 COLORS

3.4.1 General 3.4.1.1 Unless the precise color and pattern is specifically described in the Contract Documents, whenever a choice of color or pattern is available in a specified product, submit accurate color charts and pattern charts to the Owner for review and selection.

3.4.2 Comparative Analyses 3.4.2.1 Unless all available colors and patterns have identical costs and identical capabilities, and are identically suited for the installation, completely describe the relative costs and capabilities of each.

3.5 AVAILABILITY OF SPECIFIED ITEMS

3.5.1 The Contractor shall be responsible for verifying prior to bidding that all specified items will be available in time for installation during orderly and

JUNE 2026 01300-2 SUBMITTALS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project timely progress of the Work.

3.5.2 In the event specified item or items will not be so available, so notify the Engineer prior to receipt of bids.

3.5.3 Costs of delays because of non-availability of specified items, when such delays could have been avoided by the Contractor, will be the sole responsibility of the Contractor.

3.6 OPERATION AND MAINTENANCE MANUALS (See Part 8.0)

3.7 IDENTIFICATION OF SUBMITTALS

3.7.1 Completely identify each submittal and resubmittal by showing at least the following information on a cover sheet accompanying each electronic PDF of each submitted product.

3.7.1.1 Name and address of submitter, plus name and telephone number of the individual who may be contacted for further information. The Contractor shall check and verify all submittals for conformance to the plans and specifications prior to submission to the Engineer. Each set shall be signed indicating conformance with this requirement.

3.7.1.2 Name of project as it appears on the title page of these Specifications.

3.7.1.3 Drawing number and specifications section number to which the submittal applies.

3.7.1.4 A unique number which identifies this submittal from all others. A numbering procedure shall be agreed upon by the Contractor and the Owner/Engineer at the Pre-Construction meeting.

3.7.1.5 Whether this is an original submittal or resubmittal.

3.8 COORDINATION OF SUBMITTALS

3.8.1 General 3.8.1.1 Prior to submittal for review, use all means necessary to fully coordinate all materials, including the following procedures:

a Determine and verify all field dimensions and conditions, materials, catalog numbers, and similar data.

b Coordinate as required with all trades and with all public agencies involved.

c Secure all necessary approvals from public agencies and others and signify by stamp, or other means, that they have been secured.

d Clearly indicate all deviations from the Contract Documents.

JUNE 2026 01300-3 SUBMITTALS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.8.2 Grouping of Submittals 3.8.2.1 Unless otherwise specifically permitted by the Engineer make all submittals in groups containing all associated items. The Engineer may reject partial submittals as not complying with the provisions of the Contract Documents.

3.9 TIMING OF SUBMITTALS

3.9.1 General 3.9.1.1 Make all submittals far enough in advance of scheduled dates of installation to provide all required time for reviews, for securing necessary approvals, for possible revision and resubmittal, and for placing orders and securing delivery.

3.9.1.2 In scheduling, allow at least twenty-one (21) full calendar days for the Engineer's review following his receipt of the submittal.

4.0 CRITICAL PATH PLANNING AND SCHEDULING

4.1 Within fourteen (14) days after the Notice of Award of the contract, the Contractor shall submit for approval to the Engineer a progress schedule showing the proposed order of work, the location of the Work being performed during specific time periods, and the time required for completion of the Work. The progress schedule shall be a bar chart type. Said progress schedule shall be used to establish major construction

items and be developed to permit a check on progress of the Work on a weekly basis. The Contractor shall submit revised progress schedules at each monthly progress meeting.

4.2 The Project Schedule shall give the following information:

4.2.1 The proposed dates for the start and completion of each major section of the project.

4.2.2 The proposed date of award for each subcontracted item of work.

4.2.3 The proposed start and completion of each sub-division of work and the dates at which special detail drawings will be required.

4.2.4 The delivery dates of major items of equipment.

4.2.5 The dates of testing of equipment and furnishing required manufacturer's personnel.

4.2.6 Any other items of importance to the overall completion of the project.

4.3 The Project Schedule shall also indicate the timing for submission and reviewing of Shop Drawings. Whenever there is a possibility that a delay in the checking of Shop Drawings, approvals of samples, or furnishing of additional instructions could delay the progress of the Work, the Contractor shall determine a reasonable length of time for these items consistent with the Project Schedule and shall inform the Engineer

of such time limitation when requesting decisions or approvals.

JUNE 2026 01300-4 SUBMITTALS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 4.4 The Contractor shall be responsible for preparing, displaying, monitoring and reporting the Progress Documents and shall at all times make such information available at his field office. Updated schedules shall be submitted with each request for payment.

4.5 The Contractor shall have all suppliers of critical materials, as determined by the Engineer, furnish an acknowledgement of materials ordered, with shipping dates, copies of which shall be forwarded to the Owner.

4.6 If the Contractor fails to submit the progress schedule within the time prescribed, or the revised schedule within the requested time, the Engineer may withhold approval of progress payment estimates until such time as the Contractor submits the required progress schedules.

4.7 If, in the opinion of the Engineer, the Contractor falls significantly behind the approved progress schedule, the Contractor shall take any and all steps necessary to improve his progress. The Engineer, in this instance, may require the Contractor to increase the number of shifts, initiate or increase overtime operations, increase days of work in the work week, or increase the amount of construction plant, or all

of the above. The Engineer may also require the Contractor to submit for approval supplemental progress schedules detailing the specific operational changes to be instituted to regain the approved schedule, all without additional cost to the County.

4.8 Contractor shall also refer to Article 2 of the General Conditions for further details about requirements for preparing and submitting Project Schedules.

5.0 CONTRACT BID BREAKDOWN

5.1 Within fourteen (14) days after the award of the Contract, the Contractor shall submit to the Engineer a breakdown schedule of the various lump sum portions of the Work, including quantities, aggregating the total price of each lump sum item, and divided so as to facilitate payments for work under each item. The schedule shall be prepared in such form and in such detail as the Engineer may approve. Each item

in the Schedule shall include its proper share of overhead and profit. This Schedule requires the approval of the Engineer and shall be used only as a basis for evaluating each Application for Payment.

6.0 APPLICATIONS FOR PAYMENT

6.1 The Application for Payment shall be submitted as described in Article 14 of the General Conditions. Quantities shall be reviewed with Owner’s field representative prior to submission to the Owner.

6.1.1 Applications shall be submitted with documentation for stored materials.

6.1.2 Applications shall use the forms provided in the Contract Documents or a form agreeable to all parties.

7.0 OPERATION AND MAINTENANCE MANUALS

7.1 General

JUNE 2026 01300-5 SUBMITTALS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 7.1.1 The Contractor shall furnish and submit to the Engineer the specified number of Operation and Maintenance (O&M) Manuals for approval. The O&M Manual shall cover all products, equipment and systems provided and installed that are listed below.

7.1.2 While work is in process but prior to the 50 percent payment, the Contractor shall deliver a single pdf of the O&M Manual in preliminary draft form to the Engineer for review. Prior to completing the Work and prior to the 85 percent payment, the Contractor shall provide a single pdf of the final draft O&M Manual to the Engineer for approval. All comments generated by the Engineer during review of the preliminary draft manual must be adequately

addressed by the Contractor prior to submission of the final draft manual.

The final draft O&M Manual must be received by the Engineer prior to scheduling the Conditional Acceptance inspection and issuance of Final Acceptance.

7.1.3 The final draft O&M Manual must be approved by the Engineer, and a pdf of the O&M Manual shall be submitted by the Contractor prior to the Final Acceptance inspection and issuance of Final Acceptance. Three (3) physical copies of the O&M Manual and an electronic copy (PDF) shall be supplied to the Owner, one (1) to be kept at the QACSD office, one for the Town of Sudlersville, and one (1) to be kept at the WWTP.

7.1.4 There will be no deviations from these requirements.

7.1.5 Manual Preparation 7.1.5.1 Manuals shall include both a comprehensive shop drawing submittal log as well as equipment operation and maintenance data. The shop drawing submittal portion of the manual shall contain a complete set of all approved shop drawing submittals for the Project. A typed table of contents shall be prepared by the Contractor indicating the submittal number and submittal description.

7.1.5.2 All submittals shall be indexed by a reinforced divider with a typewritten tab indicating the submittal number. Operation and maintenance information shall be included for all mechanical and electrical equipment. The compiled data shall consist of assembly drawings, brochures, bulletins, catalogs, catalog cuts, installation guides, lubrication schedules, operator's/owner's/ maintenance manuals, recommended spare parts inventory and

ordering information, trouble-shooting guides, warranty information, as-built wiring diagrams and other related data necessary for the operation, preventative maintenance and repair of equipment installed under this Contract. As a minimum the Contractor furnished O&M Manual shall include the following information:

a Title page giving name and location of facility, Project

JUNE 2026 01300-6 SUBMITTALS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project number, Contract number, general Contractor (name, address, and phone number), and design engineer (name, address, and phone number) and date.

b Bookmarked fly sheets with the name, address, and phone number of the equipment manufacturer, supplier, installer, and authorized representative for parts and service. In addition, all equipment nameplate data and serial numbers shall be reproduced on the fly sheet.

c Performance curves with operating points identified where applicable.

d Manufacturer's shop cuts and dimension drawings of each piece of equipment with assembly details of replacement parts.

e Manufacturer's installation, operation, maintenance, and lubrication instructions for all equipment.

f Manufacturer's trouble-shooting guides presented in the format of "decision trees." g Complete wiring diagrams, corrected to as-built conditions, of all individual pieces of equipment and systems including one-line diagrams, schematic diagrams, and interconnection and terminal board identification diagrams.

h Piping and interconnecting drawings.

i Complete parts list with parts assembly drawing, names and addresses of spare parts suppliers, and a list of recommended spare parts to be kept in stock. In addition, a complete listing of spare parts included in the original equipment purchase order and turned over to Queen Anne’s County shall be included.

j Instructions with diagrams for disassembling and reassembling the equipment for repairs or overhaul.

k The information necessary to complete the equipment file maintenance forms (manufacturer, model number, serial number, other name plate data) for each piece of equipment furnished under the contract.

l Test results and certifications including infrared tests, load tests, and vibration signatures.

7.1.5.3 All information for the manuals shall be organized and assembled in loose-leaf 3-ring binders with black plastic-coated or vinyl covers. Where necessary, more than one binder may be used to assemble the data. When two or more binders are used, each

JUNE 2026 01300-7 SUBMITTALS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project book or volume shall be titled to indicate its particular book or volume number and the total number of volumes per set (i.e., volume 2 of 12). The Contractor shall plan manual contents and shall "break" the data between volumes at reasonable locations so no loss in continuity of data presentation occurs. Tabbed index dividers shall be typewritten for legibility. Dividers shall be

reinforced on the binding edge. The indexing system shall allow easy identification and retrieval of information. The indexing system shall be consistent throughout the entire manual. All data for inclusion in the manuals shall be printed on an 8-1/2" X 11" sheet size. Where drawings or schematic diagrams cannot be reduced and maintain legibility, they may be folded to a size of 8- 1/2" X 11". Folded drawings shall be bound into the manuals by

using file pockets or sheet protectors with manufactured threehole binding edges. Illegible data due to any cause, including poor copy quality or reduction, will not be accepted. Manuals with illegible data shall be rejected and returned to the Contractor for correction.

7.1.5.4 Electronic O&M Data:

a Electronic submittals shall contain information described in “Manual Preparation” and shall meet the requirements herein.

b Electronic equipment manual files shall be submitted in searchable Adobe Acrobat Reader (.PDF) format unless otherwise mutually agreed upon by Contractor, Owner, and Engineer.

c Electronic files shall be submitted via USB drives, FTP server, or any other electronic delivery that allows for the supplied information to be downloaded to a computer. If a USB drive is selected as the electronic delivery system, it shall be provided in a Flash Drive Zipper Case for 3-ring binders with paper insert providing the project name, supplier, equipment identification and specification

section. The electronic delivery system will be separated by volumes; permanently label USB drives accordingly;

name files on FTP accordingly. Volumes will be separated by specification Divisions. Each volume shall result in a single searchable PDF file with the same name as its title of the hard copy binder. The PDF file shall have a table of contents which aligns with the printed table of contents.

7.1.5.5 Approval a Upon approval of the final manual by the Engineer, the Contractor shall submit three (3) physical binder copies

JUNE 2026 01300-8 SUBMITTALS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project and one (1) electronic copy (on USB flash drive, FTP server, or other electronic delivery system) of the completed manual to the Engineer. One (1) hardcopy binder shall be submitted to the Queen Anne’s County Sanitary District office, one (1) hardcopy to the Town of Sudlersville, and one (1) hardcopy shall be delivered to the Sudlersville WWTP site. The electronic copy shall be

distributed to all other parties via USB flash drive, FTP server, or other electronic delivery system. Final payment to the Contractor will not be made, nor will final acceptance be made until the required numbers of copies of the approved Manual are distributed.

7.1.5.6 The following equipment, as a minimum, should have an Operations and Maintenance Manual:

a Slide Gates b All valves and Yard Hydrants c Submersible Mixers d All Pumps e Chemical Feed and Storage Systems f Blowers g Diffusers h Safety and Grounding Equipment i Davit Cranes/Hoists j All instrumentation (ORP, DO, NO3, floats, pressure switches, chart recorders, etc.) k All PLC control systems and associated hardware l All Motor Starters and VFDs m All lighting n Radio Control Panels and Associated Accessories

8.0 EQUIPMENT INSTALLATION CERTIFICATION

8.1 As part of the awarded bid, the Contractor shall arrange for the manufacturer or the manufacturer’s representative to come to the site, review the equipment installation, and provide written certification that the equipment has been installed in accordance with the manufacturer’s recommendations including tolerances. Review of the equipment installation shall be in the presence of all of the following: manufacturer’s

representative, Owner (or Owner’s representative), and the Contractor.

JUNE 2026 01300-9 SUBMITTALS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 8.2 Certifications shall be submitted to the Engineer for review. After the certifications have been approved, they shall be incorporated into the O&M manual for that piece of equipment.

8.3 At a minimum, but not limited to, installation certification letters shall be provided for the following equipment:

8.3.1 All Instrumentation and Controllers 8.3.2 Slide Gates 8.3.3 Submersible Mixers 8.3.4 Blowers 8.3.5 Diffusers 8.3.6 Chemical Feed and Storage Systems

END OF SECTION

JUNE 2026 01300-10 SUBMITTALS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 01400

QUALITY CONTROL

1.0 CERTIFICATION & TESTING

1.1 The materials and equipment used in the construction of the Project shall be subject to adequate certification and testing in accordance with generally accepted standards, as required and defined in the Contract Documents.

1.2 The Contractor shall provide at their expense all tools, testing apparatus, materials and labor as necessary to provide certification required by the Contract Documents.

1.3 If the Contract Documents, laws, ordinances, rules, regulation or orders of any public authority having jurisdiction require any work to be certified, tested, or approved by someone other than the Owner, the Contractor will give the Engineer timely notice of readiness. The Contractor will then furnish the Owner the required certification and/or testing certificates for approval.

1.4 Certifications, tests or approvals by the Owner, Engineer or others shall not relieve the Contractor from his obligations to perform the Work in accordance with the requirements of the Contract Documents.

1.5 The Owner and his representatives will at all times have access to the Work. In addition, authorized representatives and agents of any participating Federal or state agency shall be permitted access to all work, materials, payrolls, records of personnel, invoices of materials, and other relevant data and records. The Contractor will provide proper facilities for such access and observation of the Work.

2.0 EXAMINATION BY THE OWNER

2.1 The Owner contemplates and the Contractor agrees to thorough examination of the Work at all times by the Owner and the Engineer, including all labor performed and materials furnished, delivered, or intended to be used in the Work, and including manufacture, preparation, and testing. The Contractor shall not use any material that has not been tested and accepted. The Contractor shall keep the Engineer advised

of the progress of the Work away from the site requiring certification or witnessing of tests, so that scheduling conflicts or delays do not develop.

2.2 Tests, or acceptance of any materials prior to shipment shall not be deemed as a final acceptance of the materials. The Owner may require tests or analysis of any portion of the materials at any time. Any material which is found to be defective, or which does not otherwise conform to the requirements of the Specifications shall be rejected and removed forthwith from the site, as provided in the Contract.

2.3 The Owner and the Engineer shall have the right to examine all materials and work done during any phase of construction, fabrication or manufacture. The Contractor shall furnish all reasonable facilities and aid to the Engineer, and safe and convenient means for the examination of any part of the Work. No work shall be closed or covered until it has been duly examined and approved.

3.0 QUALITY ASSURANCE TESTING

3.1 DESCRIPTION

JUNE 2026 01400-1 QUALITY CONTROL

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.1.1 The Contractor is required to provide all testing as described in these specifications at their own expense with the exception of the concrete strength testing and the soil compaction tests, which will be performed at the Owner’s expense when required.

3.1.1.1 Testing will be in accordance with all pertinent codes and regulations and with selected standards of the American Society for Testing and Materials.

3.1.1.2 The Engineer shall process and distribute all required copies of test reports and related instructions to ensure all necessary retesting and/or replacement of materials with the least possible delay in progress of the Work.

3.2 RETESTING

3.2.1 When initial quality assurance tests indicate noncompliance with the Contract Documents, all subsequent retesting occasioned by the noncompliance shall be performed by the same testing laboratory and the costs thereof shall be borne by the Contractor or will be deducted by the Owner from the Contract Sum.

3.3 CODE COMPLIANCE TESTING

3.3.1 Certifications and tests required by codes or ordinances, or by a plan approval authority, and made by a legally constituted authority shall be the responsibility of and shall be paid for by the Owner.

3.4 COOPERATION WITH OWNER'S TESTING LABORATORY

3.4.1 The Owner may perform any additional tests at its own expense that it may deem necessary. Representatives of the Owner's testing laboratory shall have access to the Work at all times. The Contractor shall provide facilities for such access in order that the laboratory may properly perform its functions.

3.4.2 If the Owner orders sampling, analysis or tests of materials which are specified to be accepted on certification by the manufacturer, but which appear defective or not conforming to the requirements of the Specifications, the Contractor shall bear all the costs of sampling, transportation, tests and analyses if the material is in fact found defective or does not conform to the Specifications. If the material is found to be sound and conforming to the

Specifications the Owner will pay for the testing.

END OF SECTION

JUNE 2026 01400-2 QUALITY CONTROL

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 01500

CONSTRUCTION FACILITIES & TEMPORARY CONTROLS

1.0 GENERAL

1.1 WORK INCLUDED

1.1.1 Temporary facilities and controls required for this Work include, but are not necessarily limited to:

1.1.1.1 Temporary utilities such as water and electricity.

1.1.1.2 Contractor's field office.

1.1.1.3 Sanitary facilities.

1.1.1.4 Enclosures such as tarpaulins, barricades, and canopies.

1.2 RELATED WORK DESCRIBED ELSEWHERE

1.2.1 Compliance with Safety Regulations 1.2.1.1 The Contractor shall comply with all requirements of the Federal, State, Local and industrial safety regulations for this Contract whether they are expressly incorporated or implied herein.

1.3 PROTECTION

1.3.1 The Contractor shall use all means necessary to maintain temporary facilities and controls in proper and safe condition throughout progress of the Work.

1.4 REPLACEMENT

1.4.1 In the event of loss or damage of construction facilities and/or temporary controls, the Contractor shall immediately make all repairs and replacements necessary to the approval of the Engineer/Owner and at no additional cost to the Owner.

1.5 SUBCONTRACTOR EQUIPMENT

1.5.1 Equipment furnished by subcontractors shall comply with all requirements of pertinent safety regulations as specified in Section 1.2.1 above; the ladders, hoists, planks, and similar items normally utilized by individual trades in execution of their own portion of the Work shall be considered part of this section of these specifications.

1.6 UTILITY HOOKUP

1.6.1 Installation and hook up of the various utility lines are described in Section 3.1.

2.0 PRODUCTS (NOT USED)

3.0 EXECUTION

3.1 TEMPORARY UTILITIES

JUNE 2026 01500-1 CONSTRUCTION FACILITIES

AND TEMPORARY CONTROLS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.1.1 The Contractor shall pay all costs for all electricity and other temporary utility services required for the Contractor's performance of the Work. It shall be expressly understood that the Owner assumes no responsibility for provision of temporary utilities. It shall be the Contractor's responsibility to make appropriate connection of the following services:

3.1.1.1 Temporary Water & Sanitary Facilities a The Contractor shall furnish and install all necessary temporary potable water and sanitary facilities, shall maintain these temporary facilities in a suitable manner, and upon completion of the Work shall remove all such temporary facilities.

3.1.1.2 Temporary Electricity a The Contractor may connect to existing power at the site, to the extent it is available.

b The Contractor shall furnish and install area electrical distribution boxes so located that the individual trades may use their own construction-type extension cords to obtain adequate power and artificial lighting at all points where required for installation and for safety.

3.2 CONTRACTOR'S FIELD OFFICE

3.2.1 General 3.2.1.1 The Contractor may furnish and install a Contractor's field office trailer. Extending electric power to the field office shall be paid for by the Contractor.

3.2.2 Files 3.2.2.1 Copies of the Contract, Drawings, and Specifications shall be kept on file at the Contractor's field office for reference at all times.

3.2.3 Notices 3.2.3.1 Notices, instructions, orders, directions, or other communications from the Engineer, left at the Contractor's office, shall be considered as received by the Contractor.

3.3 SANITARY FACILITIES

3.3.1 The Contractor shall furnish and install temporary toilet buildings with sanitary toilets for use by all workmen and Contractor's representatives. The Contractor shall comply with all minimum requirements of the Health Department or other public agency having jurisdiction. The Contractor shall maintain the sanitary facilities in a sanitary condition at all times.

3.4 WATER

JUNE 2026 01500-2 CONSTRUCTION FACILITIES

AND TEMPORARY CONTROLS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.4.1 Water required for construction purposes shall be provided by the Contractor at no additional cost to the Owner. This shall include all water necessary for any pressure testing and disinfection. Water necessary for reliability testing of the treatment system shall also be provided by the Contractor.

3.4.2 Potable water is available onsite. The Contractor may withdraw water from the potable water system if the appropriate backflow prevention devices are used and if the water used is measured via flow meter so that the amount of water used can be monitored by the County.

3.5 ENCLOSURES

3.5.1 The Contractor shall furnish, install and maintain for the duration of construction all required scaffolds, tarpaulins, barricades, canopies, warning signs, steps, bridges, platforms, and other temporary construction enclosures necessary for proper completion of the Work in compliance with all pertinent safety regulations and industry standards.

3.6 REMOVAL

3.6.1 The Contractor shall maintain all temporary facilities and controls as long as needed for the safe and proper completion of the Work. The Contractor shall remove all such temporary facilities and controls as rapidly as progress of the Work will permit or as directed by the Engineer.

3.7 PROJECT IDENTIFICATION SIGN

3.7.1 The Contractor shall provide and maintain a project sign. The sign shall be erected at a location of high public visibility as directed by the Engineer. The Contractor shall obtain all permits therefore, secure permission for such locations and pay all costs attendant to the sign which cost shall be included in the Contract Price.

3.7.2 The Contractor shall provide the following signs:

3.7.2.1 One MDE Sign, See MDE Grant Insert 3.7.2.2 Signs shall be erected prior to submission of first pay application.

3.8 CONSTRUCTION PHOTOGRAPHS

3.8.1 The Contractor shall plan to take pictures each day the Contractor is onsite.

Prior to each monthly progress meeting, the Contractor shall submit to the Owner a minimum of 36 digital photographs that document the construction activities of the previous month. Exceptions may be made for those months at the beginning of the project where visible work is minimal.

3.8.2 All photographs shall be in color and in focus. The Owner reserves the right to reject the construction photographs if they do not meet the requirements of these specifications. If the construction photographs are rejected, the

JUNE 2026 01500-3 CONSTRUCTION FACILITIES

AND TEMPORARY CONTROLS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project Contractor shall retake photographs as quickly as possible and resubmit the photographs to the Owner for approval.

3.8.2.1 Photographs shall be provided electronically via email or FTP server prior to each monthly progress meeting.

3.8.3 The construction photographs shall be presented to the Owner prior to the monthly progress meeting. The photographs shall be in JPEG format or other format acceptable to the Owner. The electronic folder containing the photos shall be labeled with the project name, date, and calendar days during which the photographs were taken.

3.8.4 Costs for construction photographs shall be included in the Contract Price.

3.9 STORAGE OF MATERIALS

3.9.1 The Contractor shall be responsible for any storage area required for storage of materials related to the Contract. The Contractor shall be responsible for procuring and securing rental property and storage facilities needed to store the equipment and materials required for the Contract. Costs for storage of materials shall be included in the Contract price. The Contractor shall not assume that the Owner will provide any storage areas.

END OF SECTION

JUNE 2026 01500-4 CONSTRUCTION FACILITIES

AND TEMPORARY CONTROLS

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 01650

RELIABILITY TESTING

1.0 GENERAL DESCRIPTION AND INTENT

1.1 The Contractor shall furnish all labor, materials, equipment and services for the testing, start-up, and instructions for the Work completed as part of this project.

1.2 The intent of the reliability test is to demonstrate the proper operation of the new equipment prior to placing it online for treatment of wastewater. The reliability test will help the Owner and Engineer identify any general problems with the new process/equipment (controls, alarms, equipment interactions, etc.) before placing them online. Problems identified by the Owner and Engineer will be addressed by

the Contractor prior to the new equipment/process being placed online and prior to Substantial Completion being granted.

1.3 The intent is to test the equipment with potable water and not use raw or partially treated wastewater.

1.4 The Contractor shall coordinate with the County at least 2 weeks in advance of the reliability testing and receive written approval from the County that the reliability testing may proceed.

2.0 PRE-REQUISITE ITEMS FOR RELIABILITY TESTING

2.1 All prerequisite items discussed in paragraph 8.8.1 of Section 01000 shall be completed prior to the start of reliability testing.

3.0 RELIABILITY TESTING

3.1 It is understood that reliability testing will not be completed on any existing equipment or instrumentation that is not modified by this Contract. Ensuring the operability of any existing equipment and instrumentation is not a responsibility of the Contractor and all parties assume the existing equipment is operable.

3.2 In general, the equipment, instrumentation, and alarms shall operate as described in the equipment specifications, the applicable sections from Division 16, and the electrical/control drawings.

3.3 Reliability testing will be conducted before the PAR is placed online as part of the overall treatment process. All reliability testing shall be completed twice, once under utility power and once under generator power.

3.4 The following equipment/instrumentation shall be tested:

3.4.1 Post Anoxic Reactor 3.4.1.1 Dissolved Oxygen Probe a Ensure the DO concentration is transmitted to the SC4500 controller and then received at the Biolac control panel.

b Follow the manufacturer provided instructions in the LDO probe user manual for diagnostics and testing.

JUNE 2026 01650-1 RELIABILITY TESTING

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.4.1.2 ORP Sensor a Ensure the ORP concentration is transmitted to the SC4500 controller and then received at the Biolac control panel.

b Perform the manufacturer provided calibration procedures for pH and ORP.

c Follow the manufacturer provided instructions in the differential pH and ORP sensor probe user manual for testing the ORP sensor.

d Confirm the Biolac Control Panel sends a high ORP alarm to the County via the RTU system based on the operator set point for high ORP.

e Confirm the Biolac Control Panel sends a low ORP alarm to the County via the RTU system based on the operator set point for low ORP.

3.4.1.3 Nitrate Sensors – Influent Channel and Reaeration Zones a Ensure the nitrate concentration is transmitted to the SC4500 controller and then received at the Biolac Control Panel (BCP).

b Confirm the BCP calculates the average of the two reaeration zone sensors and transmits that analog signal to the County via the RTU system.

c Follow the manufacturer provided instructions in the NT3100sc user manual for diagnostics and testing.

3.4.1.4 SC4500 Controller a Ensure the signals received at the SC4500 controller are transmitted to and received at the Biolac control panel.

3.4.1.5 High Level Switch Float – Influent Channel and Each Side of the PAR Tank a Lift the high level float above the water surface so that it is in the up position, so the high level float alarm is triggered.

i Confirm the high-level alarm is displayed at the Biolac control panel.

ii Confirm the County gets notification of the alarm via the RTU system.

3.4.1.6 Mixer a Visually confirm the mixers are in operation via observed mixing patterns in the PAR tank. All four mixers shall be

JUNE 2026 01650-2 RELIABILITY TESTING

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project tested.

b Use a jumper wire to simulate seal fail and thermal overload from each mixer. Ensure alarms are displayed at the Biolac Control Panel and via the RTU system.

Confirm mixer shuts down and is taken out of service by the Biolac CP when in Automatic mode.

c Confirm the local control station works at each mixer location.

3.4.1.7 Blower a Ensure the blowers run in continuous operation.

b Ensure the pressure relief valve is operating as intended.

c Confirm control of the blowers via the Biolac Control Panel.

d Simulate an overload condition at each blower starter and confirm the blower overload alarm is displayed at the Biolac Control Panel for each blower. Confirm the County receives notification via the RTU system. Confirm the backup blower turns on after manual adjustment of valves and acknowledgement of such at the Biolac Control Panel by the operator. See section 16965 for additional information.

e All three blowers shall be tested.

3.4.1.8 Coarse Bubble Diffuser a When the blowers are in operation, confirm all diffusers are releasing coarse bubbles.

3.4.2 Methanol Chemical Feed System 3.4.2.1 Ensure following flow signals are received at the Biolac control panel:

a Influent PS via the new radio communication b RAS flow – existing signal c Recycle flow via the new chart recorder 3.4.2.2 Check the output of the chemical feed pumps a Operate the valves at the chemical pumps so they are drawing from the calibration columns and not from the methanol tank.

b Fill the calibration column with water to test the output of the chemical feed pumps.

JUNE 2026 01650-3 RELIABILITY TESTING

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project c Set the speed of the chemical feed pumps manually to a known RPM value.

d With the chemical feed pumps in “HAND” and the speed of the chemical feed pump set at the VFD, turn one of the pumps on and run it for a minute. Record the amount of water withdrawn from the calibration column. Confirm the output from the pump matches the manufacturer’s literature based on RPM and tube size.

e Repeat the test on all four chemical feed pumps.

f Return valves to normal positions and pump speeds to automatic.

3.4.2.3 Check chemical feed controls programming a Confirm the chemical feed pumps operate as described in 11389.

3.4.2.4 Check the low pressure switch a Close the isolation valve to the low pressure switch.

b With the chemical feed pumps in “HAND,” run the pumps so that they begin to send test water through the piping.

c As the pumps continue to pump, the low pressure switch will be disconnected from the methanol flow and will not experience any pressure. When this happens, confirm the low pressure switch is engaged and the alarm is displayed at the Biolac Control Panel and sent to the County via the RTU system.

d Repeat for each pump.

3.4.2.5 Check the high pressure switch a Close the isolation valve downstream of the high pressure switch to prevent discharge from the pump to the system.

b With the chemical feed pumps in “HAND,” run each pump individually so that they attempt to discharge test water to the system.

c As the pump continues to run, pressure will build up in the piping. When this happens, confirm the high pressure switch is engaged and the alarm is displayed at the Biolac Control Panel and sent to the County via the RTU system.

3.4.2.6 Check the alarms from the Methanol Storage Tank Control Panel a Simulate high level in the methanol tank and confirm the alarm is displayed at the Methanol Storage Tank Control

JUNE 2026 01650-4 RELIABILITY TESTING

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project Panel, at the Biolac Control Panel, and sent to the County via the RTU system.

b Simulate low level in the methanol tank and confirm the alarm is displayed at the Methanol Storage Tank Control Panel, at the Biolac Control Panel, and sent to the County via the RTU system.

c Simulate liquid in the secondary containment part of the Methanol Storage Tank (without adding liquid) and confirm the alarm is displayed at the Methanol Storage Tank Control Panel, at the Biolac Control Panel, and sent to the County via the RTU system.

3.5 At the completion of the reliability testing, refer to Section 8.9 of specification 01000.

4.0 SCHEDULE

4.1 The Contractor must complete these services within the Contract Time established in the Contract and General Conditions.

END OF SECTION

JUNE 2026 01650-5 RELIABILITY TESTING

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 01700

PROJECT CLOSE OUT

1.0 CLEANING UP

1.1 When directed and before the final inspection, the entire work area shall be cleared of all rubbish and thoroughly cleaned by the Contractor, including the following:

1.1.1 All construction facilities, debris and rubbish shall be removed from the site.

1.2 Immediately after unpacking, all packing materials, case, lumber, excelsior, wrapping, or other rubbish, flammable or otherwise, shall be collected and removed from the work area.

1.3 The Contractor shall bear full responsibility for cleaning up during and immediately upon completion of his work, and shall remove all rubbish, waste, tools, equipment, and appurtenances caused by and used in the execution of his work.

2.0 RECORD DRAWINGS (AS BUILT)

2.1 The Contractor shall be furnished with one set of prints of all Contract Drawings including electrical instrumentation drawings which shall be used exclusively by the Contractor for incorporating thereon the as-built information of all Contract Work as the construction progresses.

2.2 This complete set of prints shall be maintained at the site at all times, and the Contractor shall be responsible for having clearly, neatly, accurately, and promptly recorded thereon, as the Work is performed, the record of the Contract Work.

Principal dimensions, elevations, locations and such other data as required shall be recorded for all work.

2.3 The marked-up prints will be reviewed periodically by the Owner and Engineer and shall be corrected immediately if found either inaccurate or incomplete.

2.4 At the completion of the project, the set of marked up prints shall be submitted to the Engineer for final inspection and comment; the Contractor shall correct, amplify, and do all other work as may be required by the Engineer to complete the as-built information in a manner satisfactory to the Engineer.

2.5 Provide one (1) copy of as-built Electrical Instrumentation drawings to the Engineer and one (1) copy in each electrical control panel.

3.0 FINAL INSPECTION - SUBSTANTIAL COMPLETION - CONDITIONAL ACCEPTANCE –

RETAINAGE

3.1 Conditional acceptance/Substantial completion of the Work shall be made by the Owner and the Engineer and shall be contingent upon the findings of a thorough examination of the Work. Such examination shall be made within ten (10) working days after receipt of the Contractor's written request, therefore.

3.2 Prior to the Contractor notifying the Engineer that the Work is ready for substantial completion examination, the Contractor shall have procured, received, or performed the following:

JUNE 2026 01700-1 PROJECT CLOSE OUT

QUEEN ANNE'S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.2.1 Restored all areas to their original or proposed condition including any repaving, pouring of concrete, or other work necessary to return the area to its original or proposed condition.

3.2.2 Turned over all as-built drawings to the Engineer.

3.2.3 Successfully completed the WWTP reliability testing per section 01650.

3.3 The Work will be deemed substantially complete as of the date of such examination if the Engineer and Owner find that no further work remains to be done at the site.

The Engineer will then issue a letter to the Contractor granting substantial completion. The Engineer shall forward a determination of substantial completion in writing to the Contractor within ten (10) working days of the final inspection.

3.4 If the examination reveals items of work still to be performed, the Engineer and Owner shall issue a punch list based on the site examination. The Engineer will assign a dollar value to the punch list. At a minimum, the amount of retainage shall be two (2) times the punch list value. The retainage withheld by the Owner after final inspection shall be more than the value of the punch list if, in the opinion of the

Engineer, the Owner requires further financial protection. The Engineer shall forward, in writing, necessary corrective actions to be taken by the Contractor, a dollar value of the punch list items, and the punch list to the Contractor within ten

(10) working days of the final inspection.

3.5 The Contractor shall make all corrective actions described in the punch list and shall notify the Engineer, in writing when all punch list items have been addressed. The Engineer, or Owner’s representative, shall verify that all punch list items have been addressed by the Contractor.

3.5.1 If punch list items have not been addressed, the Engineer shall notify the Contractor, in writing. This process shall continue until all punch list items have been addressed.

3.5.2 If, in the opinion of the Engineer or Owner, the project is substantially complete and all punch list items have been adequately addressed, the Engineer shall issue a letter granting substantial completion as described in 3.3.

END OF SECTION

JUNE 2026 01700-2 PROJECT CLOSE OUT

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 02050

DEMOLITION AND REMOVAL

1.0 GENERAL

1.1 DESCRIPTION OF WORK

1.1.1 The scope of the work, without limiting the generality thereof, consists of demolition and removal operations necessary to remove the existing concrete structure leftover from the decommissioned methanol storage tank.

All demolition and removal work included in this section shall be in accordance with the approved Schedule of Demolition Procedures (see Part 3.0).

1.1.1 All standards, codes, specifications, etc., referred to herein shall be the latest issue.

1.2 REQUIREMENTS

1.2.1 The Contractor will be responsible for having visited the site and acquainting themself with the nature, character, and extent of the removal, demolition and alterations required under this Contract.

1.2.2 The Contractor shall not proceed with the removal or alteration of any structure unless and until they receive the written approval from the Owner.

Ten business days prior to the commencement of work, the Contractor shall prepare a Schedule of Demolition Procedures and receive approval of same from the Owner before commencing actual work at the site. Work shall not be started without prior approval of the Owner.

1.2.3 Persons and property shall be protected throughout the progress of the work.

The work shall proceed in such a manner as to minimize the spread of dust and flying particles and to provide safe working conditions for Contractors and personnel.

2.0 PRECAUTIONS

2.1 Demolition and removal shall be conducted with prime consideration given to the following:

2.1.1 Protection of the public 2.1.2 Protection of the environment 2.1.3 Protection from the weather 2.1.4 Elimination of noise 2.1.5 Elimination of dirt and dust 2.1.6 Orderly access and storage for materials 2.1.7 Protection of the existing work that is to remain

JUNE 2026 02050-1 DEMOLITION AND

REMOVAL

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

2.2 PREPARATION

2.2.1 Provide, erect, and maintain temporary barriers and security devices for demolition material and equipment.

2.2.2 Protect existing materials, equipment, appurtenances and structures, which are not to be demolished.

2.2.3 Thirty days prior to performing any demolition, there shall be a coordination meeting between the Contractor, Owner, and Engineer to discuss and establish the Contractor’s procedures. Items to be discussed shall be, but not limited to, dust control, sequence of work, removal of material, protection of existing equipment, access and egress of material, etc. Demolition procedures shall be coordinated with the Owner’s operating personnel and

operations. The demolition procedures shall be approved by the Owner. The Contractor shall submit a written detailed demolition plan for review and approval by the Owner.

2.2.3.1 Following the coordination meeting and Owner approval, the Contractor shall proceed after obtaining written authorization to proceed.

2.3 UTILITIES

2.3.1 Before starting removal of existing work, the Contractor shall have all services affected identified, disconnected, and capped as applicable and as required in accordance with the rules and regulations governing the utility involved. Preserve and protect all active utilities that are to remain in service.

2.4 ACCESS

Maintain adequate and legal passage to and from all active utilities and treatment facilities currently in operation. Construction equipment necessary for demolition shall not be operated in a manner that will impede upon personnel access to all treatment infrastructure. Additionally, provision shall be made to maintain security with regard to open excavations.

2.5 EXAMINATION

2.5.1 Demolition Drawings, if provided, are based on field observation and existing record documents. Report discrepancies to Engineer before disturbing existing installation.

2.5.2 Beginning of demolition means Contractor has examined the site and accepts existing conditions and forgoes any claims for additional compensation.

2.6 TRANSPORTATION

2.6.1 All trucks carrying loose, dry material such as debris, etc., shall be covered by tarpaulins to prevent blowing away or spillage of contents. All spillage of whatever nature shall be promptly taken up and removed.

2.7 REMOVAL OF EXISTING FACILITIES

JUNE 2026 02050-2 DEMOLITION AND

REMOVAL

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.2.6 Debris shall not be allowed to accumulate and shall be sprinkled during handling and loading to reduce dust and fire hazards.

2.2.7 Removal of the existing equipment specified to be removed shall be taken down to the extent indicated, specified, or required.

2.8 CUTTING AND REPAIRS

Any damage of existing facilities of any kind due to work under this section, including the interruption of a utility service which is to remain in operation, shall be repaired or restored by and at the expense of the Contractor. Cutting of concrete, masonry, pavement, or other items shall be done in a neat and workmanlike manner, so as not to damage existing items. The cutting shall be carefully laid out accurately

beforehand so as to minimize over-cutting. All repairs and restoration, except as otherwise specified in other technical sections, shall match adjacent work and finish in every respect, unless otherwise specified or indicated.

3.0 SCHEDULE OF WORK

3.1 Demolition necessary for the removal of the existing concrete structure leftover from the decommissioned methanol storage tank shall not deviate from the guidelines set forth by this section of Specifications. All structures to be removed, not otherwise specified herein, shall be removed under the scope of this Specification section at no additional cost to the Owner.

3.1.1 Upon satisfactory completion of all tasks set forth per Section 01650, Reliability Testing, and coordination between the Contractor and the Owner has been established per paragraph 1.2.2 of this Specification section, decommission of the existing concrete structure leftover from the decommissioned methanol storage tank may begin. Work performed during demolition and removal includes, but is not limited to the following:

3.1.1.1 All above-grade structures and associated component shall be demolished and removed.

3.1.1.2 All materials located between 24 inches below grade and grade elevation, including concrete work, shall be demolished and removed from the site.

3.1.1.3 The remaining concrete work shall be filled to grade with spoil remaining onsite.

3.1.1.4 Remove all existing electrical materials and equipment at the decommissioned methanol station. Remove materials, supports, anchors, and equipment no longer used including wiring, disconnects, devices, conduits, instrumentation, and supports.

Remove or cut off all exposed piping/conduit and electrical equipment. For concealed or embedded conduit, junction boxes, or other electrical items, remove to a point at least ¾” below the final finished surface. Remove existing unused wires from the source of power, or connection, through all conduits. Required Pipe Diameter (inch)

JUNE 2026 02050-3 DEMOLITION AND

REMOVAL

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.1.1.5 Topsoil shall be restored per paragraph 2.7 of Section 02200, Earthwork, and shall be seeded to promote grass growth.

4.0 DISPOSAL OF WORK REMOVED

4.1 All non-salvageable refuse and debris which accumulates as a result of work under this Section shall be removed from the site. It is the responsibility of the Contractor and his subcontractors to make all required arrangements for legal disposal of such material in connection with their respective work.

4.2 All existing items removed under this Section shall become the responsibility of the Contractor and shall be legally disposed of at his expense except items requested by the Owner.

4.3 No refuse or debris of any nature shall be allowed to accumulate to the detriment of the work or to the good appearance of the site. All refuse and debris shall be gathered and disposed of at frequent, regular intervals at least once a week.

5.0 CLEAN UP

5.1 At the completion of work, all rubbish, debris, waste materials and salvaged materials from and about the site buildings and structures, as well as all tools, scaffolds, apparatus and appliances used in connection with work under this section shall be removed by the Contractor and the premises shall be left in clean condition satisfactory to the Engineer.

END OF SECTION

JUNE 2026 02050-4 DEMOLITION AND

REMOVAL

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 02100

CLEARING AND GRUBBING

AMENDMENT TO QUEEN ANNE’S COUNTY STANDARD SPECIFICATIONS

CLARIFICATION:

Burning is not permitted. All references to burning in the Queen Anne’s County standard specification are not applicable.

02100.2.01.E. ADD the following paragraph:

The Contractor shall control the suspension of dust from construction and stockpiling operation. Wind erosion control methods or other suitable control measures approved by the Engineer shall be used to control dust emissions from stockpiling sites. Dust from trench excavations shall be controlled by wetting surfaces with water.

END OF SECTION

JUNE 2026 02100-1 CLEARING AND GRUBBING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 02200

EARTHWORK

1.0 GENERAL

1.1 DESCRIPTION OF WORK

1.1.1 The Contractor shall excavate, sheet, shore, dewater, backfill, compact and grade all excavations, and shall make all fills that may be necessary for constructing the Work under this Contract. The above shall also include all subsurface explorations, grading, and structure and trench excavation and backfill. The Contractor shall furnish all labor, materials, and equipment necessary for the completion of the Work.

1.1.2 All excavation required under this Contract shall be unclassified; that is, the prices listed on the Bid Form shall be taken to include and cover all materials required to be excavated whether wet or dry or rock and regardless of the character of the materials. This includes excavation for roadways, building and vessel structures, parking lots and trenching for all underground lines.

1.1.3 Permanent seeding shall be in accordance with Maryland Standards and Specifications for Soil Erosion and Sediment Control, Permanent Seeding.

Permanent Seeding shall also be in accordance with Queen Anne’s County Standard Specification 02485.

1.1.4 Definitions 1.1.4.1 Fill material is soil material used for trench backfill, structural fill, embankment fill, and other backfill.

1.1.4.2 Filled areas are areas which have received trench backfill, structural fill, embankment fill, or other backfill placed and compacted as specified herein.

1.1.4.3 Structural fill is a filled area upon or within which a structure is to be constructed.

1.1.4.4 Embankment fill is a structure constructed of soils material with a top surface higher than the adjoining surface.

1.1.4.5 Paved areas are areas over which paving exists, or is to be placed under this Contract, or areas designated on the Contract Drawings to receive future paving.

1.1.4.6 Borrow structural fill, borrow trench backfill, borrow embankment fill and borrow fill are suitable materials meeting requirements specified herein, provided from locations outside of the limits of the excavation.

1.1.4.7 Controlled blasting is a method used to remove rock in which the various elements of the blast (hole size, depth, spacing, burden, charge size, explosive charge, weight per delay, distribution, delay sequence), are carefully balanced and controlled to provide

JUNE 2026 02200-1 EARTHWORK

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project a distribution of the charge that will fracture the rock so it may be excavated to the required contours and minimize overbreak and fracturing of the rock beyond the contour line. Smooth wall blasting, pre-splitting, cushion blasting and line drill are examples of operations included in the term "controlled blasting".

1.2 QUALITY ASSURANCE

1.2.1 Field Requirements 1.2.1.1 The Contractor shall furnish a guarantee that filled areas will not suffer from ponding or settlement in excess of the following limitations for a period of one year from the date of final acceptance. Fill material which settles in excess of the following limitations shall be removed and replaced with suitable material at no cost to the Owner. Structures, paving, landscaping, and

other site improvements damaged by settlement, shall be removed and replaced at no cost to the Owner.

a Paved areas, areas within five feet of structures, and public rights-of-way 0.05 foot.

b Unimproved areas 0.25-feet, sloped to provide positive drainage.

c All other areas 0.10-feet.

1.2.2 Inspections and Testing 1.2.2.1 Placing fill material and performing earthwork will be subject to continuous inspections. The County, or the County’s representative, will complete field density tests on the compaction of each layer of fill in accordance with one of the following: ASTM D1556 or ASTM D6938.

1.2.2.2 After completion of each layer of fill designated area, the Contractor shall provide equipment to cut out smooth surfaced spot locations designated by the County, or the County’s representative, on which to perform the test. Copies of the test results shall be given to the County’s onsite representative for their files. When the tests indicate that density or moisture content does not meet requirements specified herein, the

particular layer, or portion thereof, shall be reworked by rolling or by scarifying, wetting or drying and recompacting until the required density has been obtained and verified by additional testing.

1.2.2.3 Test fill throughout the entire depth of the fill for all applicable areas.

JUNE 2026 02200-2 EARTHWORK

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 1.2.2.4 When field-testing per AASHTO T 272-10 indicates differences in soil types, reference and/or verify test results using one-step field proctors or laboratory proctors following AASHTO T 180.

1.2.2.5 Re-excavate and recompact failed test areas, at 25-foot intervals, the entire trench depth and length until retests meet above referenced standards. The Contractor will be responsible for performing any required retests.

1.2.2.6 Compaction reports shall include the following:

a Certified by Professional Engineer registered in the State of Maryland b Field density Compaction Test Results c Contract Number d Soils Technician Name and Employer e Test Number f Date of Test g Location of Test h Retest results of previous tests (and number), if required i Depth of Test j Dry Density k Moisture Content l Rock Percentage m Rock correction with Mixed Dry Density and Moisture Correction

n Maximum Density/Optimum Moisture Curve Relationship Chart following T 180 o Test Results p One Step Proctor Determination (when taken) q Additional Comments r Submit test results to the Owner within one week of TEST

1.3 SUBMITTALS

1.3.1 Delivery Tickets 1.3.1.1 Submit delivery tickets to the County’s onsite representative with each load of borrow, subgrade, and bedding material showing the following information:

a Name and location of supplier.

JUNE 2026 02200-3 EARTHWORK

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project b Type and amount of material delivered.

2.0 MATERIALS

2.1 FILL MATERIAL

2.1.1 General Requirements for All Fill Material 2.1.1.1 All fill material shall be free of refuse, organic matter, frozen material and other objectionable material.

2.1.1.2 Excavated materials meeting requirements stipulated herein shall be used, when approved by the Engineer. Otherwise, the Contractor shall excavate, haul, and place material from other approved sources.

2.1.1.3 Fill material shall be at a moisture content that will permit compaction to the density specified.

2.1.2 Trench Backfill 2.1.2.1 Fill material for trench backfill shall meet the requirements set forth in Paragraph 2.1 and, in addition, trench backfill up to three feet over the top of the pipe shall contain no rock or gravel larger than three inches.

2.1.2.2 Fill material for trenches in unimproved areas shall have a maximum density not less than 100 pounds per cubic foot as determined by T 180 with the exception of gradation requirement which are the following: Material from two feet above pipes to surface shall contain no more than 25 percent retained on number 4 sieve, none being larger than 3.99 inches in the greatest dimension. This material shall also be well graded.

Material placed lower than two feet above the top of the pipe shall contain no material over one inch In size.

2.1.2.3 Fill material in areas under future paving, existing paving, and within 5-feet of a structure shall meet requirements of Paragraph 2.1.2.2. The top 12 inches of backfill shall meet one of the following materials requirements:

a Soil having a maximum density not less than 105 pounds per cubic foot as determined by AASHTO T 180 (modified proctor acceptable +/- 2% optimum moisture), with a liquid limit not exceeding 40; a plasticity limit not exceeding15; containing no rock larger than 3 inches in the greatest dimension. The following groups of soils are unacceptable GP, OL, MH, CH, OH, and Pt.

b Special backfilling having a maximum dry weight not less than 115 pounds per cubic foot as determined by T 180, with a liquid limit not exceeding 30; a plasticity index not

JUNE 2026 02200-4 EARTHWORK

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project exceeding 6; conforming to MSHA gradation CR 6, or gravel SB II.

2.1.2.4 Borrow aggregate gradations shall conform to MSHA Standard Specifications for Construction Materials.

2.1.2.5 Where excavated material does not meet requirements for select fill, Contractor shall furnish off-site borrow material meeting the specified requirements herein. Borrow material shall be considered as incidental to the contract. When the excavated material from required excavations is suitable to use as backfill, bedding, or embankments, but is replaced with off-site borrow material for the Contractor’s convenience, the costs associated

with such work and material shall be borne by the Contractor.

2.1.3 Structural Fill, Embankment Fill and Other Fill Areas 2.1.3.1 Soils material for these fills shall meet requirements of AASHTO MI45, material classifications A-1, A-2-4, A-2-5 or A-3 with no stone larger than three inches in the greatest dimension.

Crushed stone or bank run gravel meeting requirements of paragraph 2.1.2.3.b. may be used for structural fill. If using the unified soil classification system, soils shall be SM or better.

2.2 BEDDING FOR PIPE AND PIPE STRUCTURES

2.2.1 Bedding for elliptical pipe and sewer pipe shall be aggregate meeting requirements of AASHTO M43 size No. 8.

2.2.2 Bedding for ductile iron pipe 24-inch and smaller diameter shall be No. 57 aggregate or fine aggregate (underdrain), as defined in the MDSHA Standard Specifications. Bedding may also be trench excavation material that meets the requirements of No. 57, or MDSHA fine aggregate (underdrain), or as approved by the Owner/Engineer.

2.2.3 Bedding for all other pipe shall be granular bedding, ASTM C33 Coarse Aggregate, size number 67 except size number 57 or 4 may be used for reinforced concrete pipe larger than 15-inch diameter.

2.2.4 Bedding for pre-cast and cast-in-place structures shall be granular bedding, AASHTO M-43, Size No. 57 stone.

2.2.5 Bentonite for backfill, where required, shall be 100 percent bentonite.

Approved manufacturers are American Collaid G, GPC-30 and Wyo-Ben, Inc., Enviro Gel, Or Equal.

2.2.6 The minimum depth of pipe bedding shall be 4 inches deep. This requirement is applicable to all pipe materials.

2.3 GRAVEL BACKFILL BELOW SUBGRADE

2.3.1 Aggregate base for on-grade slabs shall be CR-6 as defined in the MDSHA standard specifications or County approved material.

JUNE 2026 02200-5 EARTHWORK

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

2.4 GRAVEL BASE FOR ON-GRADE SLABS

2.4.1 Aggregate base for on-grade slabs shall be CR-6 as defined in the MDSHA standard specifications or County approved material.

2.5 SHEETING, SHORING AND BRACING

2.5.1 Sheeting, shoring and bracing materials shall be timber, steel or aluminum, or a combination thereof, designed as required, to retain the earth around structures, prevent cave-in and settlements, and to fulfill all safety requirements.

2.5.1.1 Timber shall be structural grade with minimum working stress of 1,100 psi.

2.5.1.2 Steel sheet piling shall conform to requirements of ASTM A 328, continuous interlocking type. Struts, bracing, and all other accessories required for the sheet piling system shall meet requirements of ASTM A36.

2.6 TRENCH EROSION CHECK

2.6.1 Wood for trench erosion checks shall be pine treated with chromated copper arsenate in accordance with AWPA C2.

2.7 TOPSOIL

2.7.1 Where shown on the Contract Drawings or otherwise required, provide 6 inches of topsoil consisting of friable, fertile soil of loamy character, containing an amount of organic matter normal to the region, capable of sustaining healthy plant life and reasonably free from subsoil, roots, heavy or stiff clay, stones larger than 2" in greatest dimension, noxious weeds, sticks, brush, litter, and other deleterious matter.

2.7.2 Obtain topsoil from sources within the project limits, or provide imported topsoil obtained from sources outside the project limits, or from both sources.

3.0 EXECUTION

3.1 EXCAVATION

3.1.1 General 3.1.1.1 All material excavated shall be non-classified. Excavation shall be carried out to the lines and grades indicated on the Contract Drawings.

3.1.1.2 Excavation for on-grade slabs and pavements shall be sufficient to allow for fills, base and waterproofing materials, where indicated and required. Excavation for planting areas shall allow for topsoil. Excavation for formed concrete shall be sufficient to allow for convenient construction and removal of forms, and to allow for applications of waterproofing and curing materials, where indicated.

JUNE 2026 02200-6 EARTHWORK

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.1.1.3 It shall be the Contractor's responsibility to separate and protect excavated material that is suitable for backfill from contamination by unsuitable excavated material or other sources.

3.1.1.4 Following the completion of the initial grading process, areas of the site to receive fill, or areas of the site at-grade where structures will be located, shall be proof rolled. The proof rolling operations shall be performed using a 20-ton, fully loaded dump truck or another pneumatic-tire vehicle of similar size and weight.

Proof rolling will determine which areas need additional undercutting and/or stabilization and shall be witnessed by the Engineer.

3.1.1.5 Excavation work occurring within the vicinity of the existing Biolac lagoon/basin shall be performed in a manner that will not damage the integrity of the existing lagoon berms or the lagoon liner. The Contractor shall take care as to not perforate the lagoon liner, or damage it in any way that will cause leakage from the Biolac basin. The Contractor shall be responsible for the reparation of any damage to the existing lagoon berms incurred

during construction, without additional cost to the Owner.

3.1.2 Test Pit Excavation 3.1.2.1 Test pit excavation shall be performed with extreme precaution and in such a manner that no damage occurs to the facility being test pitted.

3.1.3 Removal of Unsuitable Material 3.1.3.1 Where material not meeting the requirements of fill material and deemed unsuitable by the Engineer is encountered either contiguous to or within the proposed limits of excavation, the Engineer may direct its removal. Depth of removal will be determined by the Engineer.

3.1.4 Unauthorized Excavation 3.1.4.1 Where unauthorized excavations are made below indicated elevations under slabs, footings, pipes, structures or outside trench pay limits, restore to proper elevations with fill materials as specified herein before and as directed by the Engineer at no cost to the Owner.

3.1.5 Sheeting, Shoring and Bracing 3.1.5.1 Method, design, and adequacy of the sheeting, shoring and bracing shall meet requirements of MOSHA and is the responsibility of the Contractor and all damage related or caused by the excavation shall be repaired by and/or at the expense of the Contractor. The design and method of the sheeting, shoring,

JUNE 2026 02200-7 EARTHWORK

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project and bracing shall provide means for its removal as backfill progresses.

3.1.5.2 Provide sheeting and shoring as required to assure safe working conditions, maintain required excavation dimensions for proper construction, and to prevent accidents, cave-ins, and damage to adjacent structures, facilities and surfaces.

3.1.5.3 Sheeting, shoring and bracing shall be placed so as not to interfere with the construction work and shall be entirely independent of all footings and structures.

3.1.5.4 Remove sheeting, shoring, bracing and all wood forms, concurrently with backfilling operations except in the pipe and structure bedding area. Such removal shall be accomplished in a manner that precludes settlement of the backfill, cave-in of the excavation sides, and prevents damage to adjacent surfaces.

Voids left or caused by the removal shall be promptly filled.

3.1.6 Trench Excavation 3.1.6.1 Excavate trenches to the width and depth indicated on the Details and on the Drawings. Provide uniform, continuous support for pipe or structure on required bedding. Remove rock, when encountered, to a minimum depth of 6-inches below the pipe, and the same depth below the bell. In general, the trench bottom shall be excavated to conform with the shape and dimensions of the

proposed pipe or structure. If the shape of the trench cannot be preserved or the trench varies from the shape of the structures, the space between the desired trench dimensions and the bottom of the excavation, as made, shall be filled with gravel backfill.

Allowance shall be made for placement of granular bedding, where specified. Material deemed unsuitable by the Engineer in the bottom of the trench shall be removed and replaced with compacted gravel backfill. Depth and width of removal shall be as directed by the Engineer. Perform excavation in the immediate vicinity of adjacent and crossing facilities by means that will not damage the facility. Damage caused to existing facilities by the

Contractor's operations shall be repaired or replaced at no expense to the Owner.

3.1.6.2 Unless otherwise authorized by the Engineer, trench excavation shall proceed no more than 75-feet in advance of the placing of backfill. The Engineer may require backfilling and subsequent reexcavation on trenches left open an unreasonable amount of time in advance of pipe installation, at no expense to the Owner.

Trenches left open overnight, or during periods when the Contractor's forces are not present shall be so protected or enclosed and marked as to cause no danger to the public or others.

JUNE 2026 02200-8 EARTHWORK

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.1.6.3 Sides of trenches in improved public ways and adjacent to other utilities or structures shall be practically plumb. Where permitted by the Engineer, sides of trenches in other areas may be sloped from a point one foot above the top of the pipe to grade. Such slopes shall be at no additional cost to Owner. Slopes shall be such as will not allow displacement of material or danger to

personnel. Sides of trenches from a point one foot above the top of the pipe to the bottom of the trench shall be practically plumb.

Bell holes shall be excavated in the bottoms of the trench wherever necessary to permit the proper assembling of joints.

3.1.6.4 Trench Sheeting a Trench sheeting shall conform to requirements specified herein and the following:

i Where sheeting is used, the distance between the interior faces of the sheeting, as driven, and the outside diameter of the tube shall be 12-inches.

ii As a general requirement, trench sheeting shall be removed as backfill progresses except sheeting within the pipe bedding limits. Trench sheeting from 6-inches above the pipe bedding to the bottom of the trench shall not be removed. Compact contiguous areas concurrent with removal of the trench sheeting.

iii Sheeting may be left in place at the option of the Contractor, provided positive verification is made that no voids exist between the sheeting and the trench wall and provided upper walls and horizontal braces are removed, or the excavation is backfilled with sand. Voids that exist shall be filled in accordance with backfill requirements. Sheeting left in place shall be cut off a minimum of 1-1/2-feet below grade or as

directed by the Engineer.

b Trench Boxes/Mules i Use of trench boxes will be permitted in areas where excavation sidewalls are suitable and where sheeting, shoring, and bracing is not required to maintain the excavation dimensions. The box shall be designed structurally to withstand pressures that may be imposed thereon. Trench boxes and their use shall meet requirements of MOSHA. No portion of the trench box shall extend below the top of the pipe

during or after placement of the pipe bedding material. Steel plates may be used below the trench box in the pipe bedding limits and may be removed

JUNE 2026 02200-9 EARTHWORK

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project after pipe bedding is placed. Size of the box shall be as follows:

ii Height shall be such as to assure safe working conditions.

iii Length shall be sufficient to accommodate the size and lengths of pipe being installed.

iv Width shall be so the trench opening will not be less than the minimum nor more than the maximum permitted in the Details.

3.2 FILL AND BACKFILL OPERATIONS

3.2.1 General 3.2.1.1 Excavations shall be backfilled with soil material excavated from the site, provided this material meets requirements of fill material herein and is approved for use by the Engineer.

3.2.1.2 Backfill around a structure or pipe shall be brought up evenly on all sides so that no unbalanced pressure will be imposed on the structure or pipe.

3.2.1.3 Do not place, spread, or compact fill material while it is frozen or thawing or place upon frozen or thawing ground or during unfavorable weather conditions. When the Work is interrupted by rain, fill operations shall not be resumed until field tests indicate that the moisture content and density of the fill are within the limits specified. A compacted layer that has been frozen shall be reworked and re-compacted after thawing before the next layer

is placed thereon.

3.2.1.4 Thoroughly mix each lift before compaction to assure uniform distribution of water content. Distribute rocks of permissible sizes through the fill material.

3.2.2 Placing Fill Material for Structural Fills, Embankment Fills and Other Fill Areas 3.2.2.1 Areas where fill is to be placed shall have root matter and top soil removed and be proof rolled with a compactor or other approved construction equipment. Soft areas evident from the proof rolling shall be excavated and refilled with approved material and compacted as specified.

3.2.2.2 Where fills are placed on hillsides or slopes of five to one or less, the surface shall be scarified before placing fill. When slope is greater than five to one, step or bench the slope of the original surface as indicated or as directed by the Engineer.

3.2.2.3 Place fill material in uniform lifts of not more than eight inches in

JUNE 2026 02200-10 EARTHWORK

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project uncompacted thickness. Spread each layer uniformly and evenly.

Perform compaction using compacting rollers, pneumatic or vibratory compactors or other equipment and methods approved by the Engineer.

3.2.2.4 Compact each layer to not less than 95 percent of maximum density in accordance with AASHTO T180 within 2% of optimum at a moisture content within three percent optimum for the material. Prior to commencing compaction, fill shall be brought to specified water content by either aerating the material if it is too wet or spraying the material with water if it is too dry.

3.2.2.5 Continue filling operation until the fill has been brought to the finished slopes and grades shown on the drawings, making proper allowances for thickness of topsoil, and pavement slabs.

Place fill so that surface will be sloped to drain at all times and deposit fills so as to prevent excessive moisture accumulation from rain water.

3.2.2.6 Compaction by large rollers or heavy equipment will not be permitted within an area five feet adjacent to structures.

Complete compaction within five feet of structures with compaction equipment that will not damage the structure.

3.2.2.7 All slopes in controlled fill areas shall be cut back at least one foot to ensure compaction for the full slope.

3.2.3 Placing Trench Backfill 3.2.3.1 Placing trench backfill shall conform to requirements specified herein for placing structural fills and embankments modified as follows.

3.2.3.2 Place and compact granular bedding in accordance with the details, specifications, or as directed by the Engineer. Place and compact granular bedding a minimum thickness of six inches under pre-cast and cast-in-place structures.

3.2.3.3 For PVC and HDPE pipe, granular bedding shall be placed and compacted under and around the pipe to one foot above the pipe.

3.2.3.4 For all pipes, compact a minimum of one foot above the top of the pipe with manual tampers in maximum six-inch loose lifts. In lieu of this, the Contractor may elect to continue the granular bedding to one foot above the top of the pipe.

3.2.3.5 For sewer pipe 15-inch and larger diameter and where a flexible connector is not used, place 100 percent bentonite a minimum of six inches all around the pipe immediately adjacent to the flexible gasket connector or grouted connection at each manhole as shown on the Details.

JUNE 2026 02200-11 EARTHWORK

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.2.3.6 Detectable warning tape shall be placed in the backfill directly over the centerline of water mainlines, water and sewer house connections, sanitary sewer force main, and all sanitary sewer collection main lines. Tape shall be placed over gravity sewer mainline when one or both manholes in a sewer reach are outside the limits of existing or proposed paved areas and when

the sewer mainline has less than six feet to cover. It shall be placed on compacted backfill not less than 18 inches or more than 30 inches below the finished surface and with a minimal amount of splices. Overlap at splices and intersections of the tape shall be a minimum of six inches. The tape will be six inches wide furnished in rolls of 300 feet or portions thereof and in two colors which shall be placed as follows: blue over water, and

green over sanitary sewer. When water and sewer are installed in the same trench only blue detectable tape for water will be used. The warning tape shall meet all requirements as laid out in Paragraph 2.06 of Queen Anne’s County Standard Specification 02221.

3.2.3.7 For areas under existing paving, complete backfill and compact in not more than eight-inch lifts up to the required 12 inches of crushed stone to not less than the following percents of maximum densities at a moisture content within three percent of optimum for the material as determined by the listed AASHTO method.

The 12 inches of crushed stone shall be compacted to these same densities in lift heights as determined in the field. Prior to commencing compaction, fills shall be brought to specified water content by either aerating the material if it is too wet or spraying the material with water if it is too dry.

a Under all Pavement except State Highways, 95 percent except for top foot which shall be 100 percent in accordance with AASHTO T180 within 2% of optimum.

b Under State Highway Pavement, 92 percent except for top foot which shall be 95 percent in accordance with AASHTO T180.

3.2.3.8 In areas under future paving and within public rights-of-way, complete backfill in not more than eight-inch lifts and compact to 95 percent density in accordance with AASHTO T180 within 2% of optimum at a moisture content that is within the range where the density can be obtained based on moisture density curves taken on existing soil.

3.2.3.9 In unimproved areas use excavated material for backfill and compact in layers to form a thoroughly dense refill free of voids and in a manner to preclude settlement.

JUNE 2026 02200-12 EARTHWORK

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.2.3.10 In all other areas, complete backfill in not more than twelve-inch lifts and compact to 90 percent density in accordance with AASHTO T180 within 2% of optimum at a moisture content that is within the range where the density can be obtained.

3.2.3.11 When borrow trench backfill material meeting requirements specified elsewhere herein is utilized, lift height requirements will be determined in the field. They shall be based on test sections and tests, prescribed and observed by the Engineer, and type of compaction equipment to be used. Backhoe buckets will be permitted for gravel consolidation only.

3.2.3.12 Utilize such compaction equipment as it will not damage the pipe and pipe joints. Pipe and pipe joints damaged by the Contractor's operations shall be removed and replaced at no cost to the Owner.

3.2.3.13 Do not backfill around pipe, connections or fittings until measurements and locations are completed by the Engineer.

3.2.3.14 On Steep slopes, place trench erosion checks at locations shown or as directed by the Engineer.

3.3 FINISH GRADING

3.3.1 Perform grading operations so that the excavation will be well drained at all times. Maintain drainage ditches and keep them open and free from soil, debris, and leaves until final acceptance of the Work. Finish all grading on neat, regular lines conforming to the sections, lines, grades and contours shown on the drawings or if not shown, in accordance with the criteria set forth hereinafter. Perform grading work in proper sequence with all other

associated operations.

3.3.2 For structures, bring finished subgrade to the elevation as shown on the drawings. Bring entire area to the finished subgrade elevation before excavating for footings.

3.3.3 Unless otherwise indicated in the Contract Documents for structures greater than 20-feet in maximum dimension, place fill at a minimum slope of two percent for a maximum of ten feet beyond the exterior wall or exterior face of the structure. From the edge of the ten foot extension, slope to existing grade a maximum slope of 1:2.5.

3.3.4 Grade all areas disturbed during the Work of the Contract. At trench locations, excavated and fill areas, and adjacent transition areas, grade so that finished surfaces are at the proposed grade or are approximately at grades existing prior to being disturbed. Adjust as required to provide positive drainage.

3.4 MATERIAL STORAGE

3.4.1 Deposit excess excavated material and unsuitable material off-site. Stockpile

JUNE 2026 02200-13 EARTHWORK

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project topsoil in a location approved by the Engineer and in a manner that will not erode and cause sedimentation.

3.5 DEWATERING AND DRAINAGE

3.5.1.1 Whether or not the presence of water is indicated within the Contract Documents, the Contractor is responsible for making his own investigation to determine if water is present. The presence or absence of water shall not entitle the Contractor to additional compensation.

3.5.1.2 If water is encountered in the excavation, provide and maintain dewatering system of sufficient capacity to remove water while excavation is being made, pipe is placed and backfilled, or for structures until the concrete footings have been poured and cured, the foundation walls or other portions of the structure are erected to grade or until the excavation has been backfilled. Do not allow sediment laden water to flow into any water course or

drainageway or over land without first filtering it through an approved desilting device.

3.5.1.3 Methods of dewatering excavations shall be at the Contractor's discretion. Continuous investigations and checks shall be made by the Contractor to assure that the dewatering system employed is functioning properly and not causing damage or settlement to adjacent surfaces or structures. The system shall be modified as required and damage caused by the system shall be the responsibility of the Contractor to repair or restore.

3.5.1.4 Provide necessary temporary surface drainage and keep the same operating to the satisfaction of the Engineer until permanent drainage or finish grading has been completed. Do not allow damming or ponding of water in gutters or storm drains.

3.6 PROTECTION OF OTHER BURIED UTILITIES

3.6.1 Unless shown to be removed, protect active utility lines as shown on the drawings or otherwise made known to the Contractor prior to excavating. If damaged, repair or replace at no additional cost to the Owner.

3.6.2 If active utility lines are encountered and are not shown on the drawings or otherwise made known to the Contractor, promptly take necessary steps to assure that service is not interrupted.

3.6.3 If service is interrupted as a result of work under this section, immediately restore service by repairing the damaged utility at no additional cost to the Owner.

3.6.4 If existing utilities are found to interfere with the permanent facilities being constructed under this section, immediately notify the Engineer and secure his instructions.

JUNE 2026 02200-14 EARTHWORK

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.6.5 Do not proceed with permanent relocation of utilities until written instructions are received from the Engineer.

3.7 PROTECTION OF PERSONS AND PROPERTY

3.7.1 Barricade open holes and depressions occurring as part of the Work and post warning lights on property adjacent to or with public access.

3.7.2 Operate warning lights during hours from dusk to dawn each day and as otherwise required.

3.7.3 Protect structures, utilities, sidewalks, pavements, and other facilities from damage caused by settlement, lateral movement, washout, and other hazards created by operations under this section.

3.8 RESTORATION OF SURFACE FACILITIES

3.8.1 The Contractor shall restore and re-stabilize surface features and facilities damage or destroyed during construction to at least the condition existing before construction.

3.9 Contractor shall take care not to overwork wet soils so as to make them unusable.

Contractor shall not be paid for import of select fill to replace material that has been overworked by the Contractor.

END OF SECTION

JUNE 2026 02200-15 EARTHWORK

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 02600

YARD PIPING

1.0 GENERAL

1.1 DESCRIPTION OF WORK

1.1.1 Work Included 1.1.1.1 The Work includes furnishing all parts, labor, equipment, appliances, and materials, and performing all operations required to provide a yard piping system as shown on the Contract Drawings, specified herein, and needed for a complete and proper installation. The yard piping system is essentially wastewater process piping throughout the site in addition to, chemical feed lines, air piping, and extension of a potable water

system. This specification covers all material located 5 feet outside of all buildings or structures.

1.2 QUALITY ASSURANCE

1.2.1 Use adequate numbers of skilled workmen who are thoroughly trained and experienced in the necessary crafts and who are completely familiar with the specified requirements and the methods needed for proper performance of the Work of this section.

1.3 SUBMITTALS

1.3.1 Provide submittals in accordance with Section 01300.

1.3.2 Product Data 1.3.2.1 Materials list of items proposed to be provided under this section.

1.3.2.2 Manufacturer's specifications and other data needed to prove compliance with the specified requirements.

1.3.2.3 Names and addresses of the nearest service and maintenance organization that readily stocks repair parts.

1.3.2.4 Manufacturers’ recommended installation procedures which, when approved by the Owner, will become the basis for accepting or rejecting actual installation procedures used on the Work.

2.0 PRODUCTS

2.1 PIPE AND FITTINGS

2.1.1 Ductile Iron Pipe 3 Inches and Larger 2.1.1.1 All buried pipe 3 inches and larger shall be Pressure Class 350 ductile iron meeting the requirements of AWWA C151 unless noted otherwise. The pipe shall be double cement lined per AWWA C104 and coated on the exterior with an asphaltic

JUNE 2026 02600-1 YARD PIPING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project coating. All buried ductile iron pipe shall have mechanical joints in accordance with AWWA C111.

2.1.1.2 All buried fittings shall be ductile iron full body fittings with mechanical joints meeting the requirements of AWWA C153. All fittings shall be double cement lined per AWWA C104 and coated on the exterior with an asphaltic coating. All bolts and other connectors shall be stainless steel.

2.1.2 When PVC Pipe is Called Out 2.1.2.1 All PVC piping shall conform to the following specifications:

a All buried pressure PVC piping shall meet the requirements of ASTM D1784, Class 12454-B. Fittings shall meet the requirements of ASTM D-2466 and shall be the solvent weld type.

b All interior PVC piping (not chemical) shall meet the requirements of ASTM D-1785, Schedule 40. Fittings shall meet the requirements of ASTM D-2466 and shall be the solvent weld type with unions at all valves and fixtures.

c All PVC chemical feed pipe/conduit shall be ASTM D- 1785 Schedule 80. Fittings shall meet the requirements of ASTM D-2467 and shall be socket welded.

2.1.3 Copper Tubing 2.1.3.1 Copper tubing shall be ASTM B-88, Type K with solder joints.

2.1.3.2 Fittings for copper tubing shall be high grade commercial wrought copper.

2.1.3.3 The lead content of solders and fluxes shall be less than 0.2%.

2.1.4 Stainless Steel Chemical Piping for Methanol 2.1.4.1 Stainless steel chemical feed pipe shall conform to ASTM A312.

2.1.4.2 Stainless steel fittings shall conform to ASTM A403.

2.1.4.3 All stainless steel welded chemical feed pipe shall be manufactured of Type 316 stainless steel.

2.1.4.4 Chemical discharge and suction piping shall be 1/4" diameter.

2.1.5 Stainless Steel Air Piping 2.1.5.1 Rolled pipe shall conform to ANSI B36.19 for pipe smaller than 12 inches in diameter.

2.1.5.2 Fittings shall conform to ASTM A774, ANSI B36.19 and ANSI B16.9.

JUNE 2026 02600-2 YARD PIPING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.1.5.3 Stainless steel pipe fabricated from sheeting shall conform to ASTM A240.

2.1.5.4 Stainless steel fittings shall conform to ANSI B16.9.

2.1.5.5 Stainless steel flanges shall be Welded or Slipring with drilling conforming to ANSI B16.9.

2.1.5.6 All stainless steel welded air pipe shall be manufactured of Type 304L stainless steel.

2.1.6 Mechanical Couplings 2.1.6.1 Couplings shall be provided where required to facilitate the installation or removal of valves and equipment, in addition to the couplings shown on the drawings. All couplings shall be designed for the same pressure rating as the pipes on which installed.

2.1.6.2 The pipe couplings shall be of a gasketed, sleeve-type, with diameter to properly fit the pipe. Each coupling shall consist of one (1) steel middle ring, 0.154 inches thick and 5 inches in length, two (2) steel followers, two (2) rubber-compounded wedge section gaskets and sufficient track-head stainless steel bolts of properly compress the gaskets. Field joints shall be made with this type of coupling.

2.1.6.3 The middle ring and followers of the coupling shall be true circular sections free from irregularities, flat spots, or surface defects.

They shall be formed from mill sections with the follower-ring section of such design as to provide confinement of the gasket.

After welding, they shall be tested by cold expanding a minimum of 1% beyond the yield point.

2.1.6.4 The coupling bolts shall be of the elliptic-neck, track-head design with rolled threads. The manufacturer shall supply information as to the recommended torque to which the bolts shall be tightened.

All bolt holes in the followers shall be oval for greater strength.

Bolts shall be made of stainless steel.

2.1.6.5 The gaskets of the coupling shall be composed of a crude or synthetic rubber base compounded with other products to produce material which will not deteriorate from age, heat, or exposure to air under normal storage conditions. It shall also possess the quality of resilience and ability to resist cold flow of the material so that the joint will remain sealed and tight indefinitely when subjected to shock, vibration, pulsation and

temperature or other adjustments of the pipe line.

2.1.6.6 The couplings shall be assembled on the job in a manner to insure permanently tight joints under all reasonable conditions of expansion, contraction, shifting and settlement, unavoidable

JUNE 2026 02600-3 YARD PIPING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project variations in trench gradient, etc. The coupling shall be Dresser, Style 38, as manufactured by Dresser Manufacturing Division, Bradford, Penna., or equal.

2.2 PLUG VALVES

2.2.1 All plug valves shall be of the non-lubricated eccentric type with resilient faced plugs. Plug valves shall be designed for a working pressure of 175 psi up to 12” diameter. Valves 14-inches and over shall be designed for a working pressure of 150 psi. Valves shall be capable of providing drip tight shut-off up to the full pressure rating with the pressure in either direction. The leakage test shall be applied to the face of the plug tending to unseat the

valve. Certified copies of reports covering proof of design testing as described in AWWA C517 shall be available upon request.

2.2.2 All plug valves shall be furnished with mechanical joint ends meeting AWWA C111.

2.2.3 Valve bodies shall be cast iron, ASTM A126 Class B. All exposed nuts, bolts, springs, washers, etc. shall be stainless steel. Resilient plug facings shall be Chloroprene. The valve shall be furnished with replaceable permanently lubricated sleeve type stainless steel bearings in both the upper and lower journals.

2.2.4 Valves 8-inches and above shall be gear operated. Manual gear operators shall be totally enclosed worm gear type, permanently lubricated sleeve-type 18-8 stainless steel bearings in the upper and lower journal. Buried service gear units shall be capable of withstanding an input torque of 300 lbs. on the operating nut. Gear segment shall be ductile iron, ASTM A536 65-45-12, supported on bronze bushings.

2.2.5 Ports shall be 100% Port. The valve port area shall meet or exceed standard pipe area per ASME/ANSI B36.10M.

2.2.6 Adjustable packing shall be Acrylonitrile-Butadiene (NBR) multiple V-ring type, with a packing gland follower. Packing gland shall permit inspection, adjustment or complete replacement of packing without disturbing any part of the valve or actuator assembly, except the gland follower.

2.2.7 Seats on shall be 1/8” thick welded overlay of not less than 95% pure nickel.

Seat shall be at least 1/2” wide, 1/8” thick through entire width and raised.

The raised surface shall be completely covered with nickel to insure that the resilient plug face contacts only the nickel seat.

2.2.8 Valves with greater than 5 foot of cover shall have an operating nut extension installed to bring the nut within 1 foot of grade.

2.2.9 The plug valves shall be Dezurik PEF 100% Port Eccentric Plug Valve, or equal. All plug valves shall be supplied from the same manufacturer.

JUNE 2026 02600-4 YARD PIPING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

2.3 ISOLATION VALVES – WATER SYSTEM EXTENSION

2.3.1 Isolation valves shall be 2" in size and shall be of a resilient wedge design.

The valve shall have a cold water rated working pressure of 250 psig. All cast ferrous components shall be ductile iron and shall be manufactured in compliance with the latest edition of ANSI/AWWAC515. The valve shall also be UL Listed and FM Approved, in applicable configurations. All valves shall be certified to NSF/ANSI/CAN 61 and NSF/ANSI/CAN 372.

2.3.2 The valve design shall be lightweight, easy to handle, and constructed with wall thickness per Table 3 of ANSI/AWWA C515. The valve shall have a smooth and oversize waterway and have the marking "D.I." or "Ductile Iron" cast onto the body. The valve wedge shall be constructed of ductile iron and shall be fully encapsulated with EPDM rubber and provided with male type guides and polymer guide covers.

2.3.3 Valve stems shall be sealed by three O-rings. Two of the O-rings shall reside above the thrust collar. Thrust collar shall be integral to the valve stem.

2.3.4 Valves shall be furnished with a debris seal above the stuffing box O-rings.

This seal shall also be capable of sealing against internal or external pressure equal to the valve's rated working pressure.

2.3.5 The valve shall also be equipped with thrust washers above and below the stem thrust collar for reduced operating torque.

2.3.6 Valve shall be equipped with PVC ends.

2.3.7 All exterior valve body bolting shall be stainless steel and shall be provided with hexagonal heads with dimensions conforming to ANSI B18.2.1. The operating nut shall be 2" square and shall be constructed of ductile iron fitted to a square tapered stem to help ensure even distribution of input torque. All body gaskets shall be of the pressure energized O-ring style design.

2.3.8 All internal and external ferrous surfaces of the valve body and bonnet shall have fusion-bonded epoxy coating, complying with ANSI/AWWA C550.

2.3.9 Isolation valves shall be the AMERICAN Flow Control Series 2500 Resilient Wedge Gate Valves with PVC Ends, or equal.

2.4 JUNCTION BOXES FOR CHEMICAL TUBING

2.4.1 Junction boxes shall be a 13”x24”, watertight junction box, made a polymer concrete enclosure.

2.4.2 Junction box shall be supplied with one 8” extension to obtain a total depth of 32”, ensuring chemical lines will be below frost depth.

2.4.3 Supply the junction box with an open bottom and bottom extension with closed bottom.

2.4.4 All hardware shall be SS.

2.4.5 The cover of the enclosure shall be labeled with “CHEMICAL.”

JUNE 2026 02600-5 YARD PIPING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.4.6 Install chemical conduit end pull guides to prevent tubing damage.

2.4.7 Junction boxes and extensions shall be 13” x 24” Polymer Concrete Enclosure and Bottom Extensions, as manufactured by newbasis, or equal.

2.5 VALVE BOXES

2.5.1 Use service boxes cast iron, extension type of the required length, with screw adjustment.

2.5.2 Provide the word "SEWER" cast into the cover for valve boxes located along sludge waste lines. Provide the word “WATER” cast into the cover for valve boxes located along potable water lines.

2.5.3 Valve boxes shall be Series 6855 Slip Type as manufactured by Tyler Union, or equal. See QAC Standard Detail for Water and Sewer Valve Box and Cover.

2.6 YARD HYDRANTS

2.6.1 Yard hydrant shall have a galvanized steel casing and cast aluminum casing, bronze and stainless steel interior parts, a 3/4-inch male hose connection w/ vacuum breaker, and a 3/4-inch outlet.

2.6.2 The hydrant shall be equipped with a tapped 1/8-inch I.P.S. drain port in valve housing.

2.6.3 Contractor shall provide and install a concrete base for each yard hydrant.

2.6.4 The hydrant shall be exposed head, non-freeze post hydrant Model Z-1396 as manufactured by Zurn Industries, Inc., PA, or equal.

2.7 TAPPING SADDLES

2.7.1 Service saddles for pipe sizes 2-in through 12-in shall have a wraparound design with ductile iron body, a broad pressure activated gasket molded of virgin rubber and two corrosion resistant, forged AISI C-1018 steel straps, zinc plated with dichromate seal.

2.7.2 The gasket shall be permanently bonded into a cavity in the saddle body, which provides internal as well as external gasket retention. Service saddles shall be IFT 402, or equal.

2.7.3 IFT Service Saddles shall be constructed of ductile iron with shop primer coating and shall have corrosion resistant AISI C-1018 steel, zinc plated with dichromate steel. Saddles shall meet or exceed AWWA C-800 Standards for service line fittings.

2.7.4 Body casting shall be of wrap around design, Ductile Iron, conforming to ASTM A-536. Body shall have a gasket cavity, which shall provide internal as well as external gasket retention.

2.7.5 Gasket shall be of molded virgin rubber with a pressure activated hydro mechanical design. Gasket shall be bonded into a cavity for internal and

JUNE 2026 02600-6 YARD PIPING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project external retention. Gasket shall be suitable for water salt solutions, mild acids, bases, and sewage.

2.7.6 Straps shall have corrosion resistant, forged AISI C-1018 steel straps, and zinc plated with dichromate seal.

2.7.7 Casting shall be coated with shop primer coating.

2.7.8 Working pressure shall be 250 psi hydrostatic.

2.8 DETECTOR TAPE

2.8.1 Detector tape shall be 3-inches wide with 1.5-inch bold black letters identifying the pipe and shall be installed in the trench above all piping.

2.9 PIPE-TO-WALL PENETRATION SEAL

2.9.1 Unless otherwise shown, the pipe to wall penetration seals shall be modular mechanical type, consisting of interlocking synthetic rubber links shaped to continuously fill the annular space between the pipe and wall opening.

2.9.1.1 Links shall be loosely assembled with bolts to form a continuous rubber belt around the pipe with a pressure plate under each bolt head and nut. After the seal assembly is positioned in the sleeve, tightening of the bolts shall cause the rubber sealing elements to expand and provide an absolutely water-tight seal between the pipe and wall opening. The seal shall be constructed so as to provide electrical insulation between the pipe and wall, thus

reducing chances of cathodic reaction between these two members.

2.9.1.2 The Contractor shall determine the required inside diameter of each individual wall opening or sleeve before ordering, fabricating or installing. The inside diameter of each wall opening shall be sized as recommended by the manufacturer to fit the pipe and sealed to assure a water-tight joint. Sleeves shall be cast into precast walls, which will have pipe passing through.

2.9.1.3 Seals and sleeves shall be Link-Seal, Model S-316, as manufactured by Thunderline/LinkSeal Corporation, or equal.

2.10 GRAVITY PIPE CONNECTOR TO STRUCTURE

2.10.1 Where shown on the drawings, pipe to structure connections shall be a flexible connector specifically engineered to produce a positive watertight seal for pipes entering precast concrete structures and the structure itself. Its heavier wall is designed to provide the highest performance. Product to also be used at other pure gravity pipe connections to structures.

2.10.2 The connector shall be manufactured to meet or exceed the requirements set forth in ASTM C-923 titled “Resilient Connectors Between Reinforced Concrete Manhole Structures, Pipes, and Laterals.

JUNE 2026 02600-7 YARD PIPING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.10.3 The connector shall be molded from an EPDM compound engineered to conform to the requirements of Section 4.1.1 of ASTM C-923. All stainless steel hardware follows Section 4.2, “Mechanical Devices” of ASTM C-923 and C-1644.

2.10.4 The connector shall be Z. Lok cast in boot connector as manufactured by A.

Lok, or equal.

2.11 CLEANOUTS/FLUSHING CONNECTIONS

2.11.1 Cleanouts/flushing connections shall be made of DIP and shall conform to the requirements of section 2.1.1 and the cleanout detail provided in the Contract Drawings.

2.11.2 Cleanout/flushing connection shall be capped with the following:

2.11.2.1 6-inch Type D SS female cam operated coupler to female NPT thread, Model 360DSS by EVER-TITE, or equal.

2.11.2.2 6” SS dust plug, Model 360DPSS by EVER-TITE, or equal.

2.11.2.3 12" brass chain shall be supplied and connected to the SS dust plug.

2.12 OTHER MATERIALS

2.12.1 All other materials, not specifically described but required for a complete and proper installation of the Work of the Section, shall be new, finest quality of their respective kinds and subject to approval by the Owner.

2.12.2 Two 4-foot long T-handle wrenches with 2-inch square nut ends shall be provided for the project.

3.0 EXECUTION

3.1 SURFACE CONDITIONS

3.1.1 Examine the areas and conditions under which work of this section will be performed. Correct conditions detrimental to timely and proper completion of the Work. Do not proceed until unsatisfactory conditions are corrected.

3.2 HANDLING

3.2.1 Handle pipe accessories so as to ensure delivery to the trench in sound, undamaged condition.

3.2.1.1 Carry pipe into position; do not drag.

3.2.1.2 Use pinch bars or tongs for aligning or turning the pipe only on the bare end of the pipe.

3.2.2 Thoroughly clean interior of pipe and accessories before lowering pipe into trench. Keep interior clean during laying operations by plugging or other approved method.

JUNE 2026 02600-8 YARD PIPING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.2.3 Before installation, inspect each piece of pipe and each fitting for defects:

Material found to be defective before or after laying: Replace with sound material meeting the specified requirements, and without additional cost to the Owner.

3.2.4 Rubber gaskets: Store in a cool dark place until just prior to time of installation.

3.3 PIPE CUTTING

3.3.1 Cut pipe neatly and without damage to the pipe.

3.3.2 Unless otherwise recommended by the pipe manufacturer, and authorized by the Owner, cut pipe with mechanical cutter only. Use wheel cutters when practicable.

3.4 PLACING AND LAYING

3.4.1 General 3.4.1.1 Lower pipe and accessories into trench by means of derrick, ropes, belt slings, or other equipment approved by the Owner.

3.4.1.2 Do not dump or drop any of the materials of this section into the trench.

3.4.1.3 Rest the full length of each section of pipe solidly on the pipe bed, with recesses excavated to accommodate bells, couplings, and joints. No blocking will be permitted.

3.4.1.4 Take up and relay pipe that has the grade or joint disturbed after laying.

3.4.1.5 Do not lay pipe in water, or when trench conditions are unsuitable for the Work, keep water out of the trench until jointing is completed.

3.4.1.6 Securely close open ends of pipe, fittings, and valves when work is not in progress.

3.4.1.7 Where any part of coating or lining is damaged, repair to the approval of the Owner and at no additional cost to the Owner.

3.4.1.8 Installation and jointing of all ductile iron piping, fittings and valves shall be per the latest revision of AWWA C600.

a All pipes, fittings, and valves to be connected by standard mechanical joints shall be installed by experienced pipe layers to the satisfaction of the Owner. Prior to making up joints, the bells, pipe ends, and rubber gaskets shall be thoroughly washed with soapy water. A cast iron gland shall be slid over the pipe and followed by a rubber gasket, thoroughly soaped, with its tapered side facing the bell. The pipe shall then be inserted fully into the bell.

JUNE 2026 02600-9 YARD PIPING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project The rubber gasket shall be forced into position with the fingers until it is flush with the face of the rubber gasket and the bolts inserted and made finger tight. Nuts shall be tightened with a torque wrench as specified by the manufacturer and AWWA. Bolts shall be drawn up evenly on alternate sides beginning at the top, keeping the gland

parallel to the face of the bell at all times. In the event the use of ratchet wrenches is permitted, extreme care shall be taken to tighten the nuts to the specified tension without overtightening. Bell hole excavation may be required to allow proper wrench movement. Mega-Lugs shall be used in all mechanical joints.

3.4.1.9 Ductile iron pipe and fittings shall be installed in accordance with AWWA C600 "Installation of Ductile Iron Water Mains and their Appurtenances." 3.4.1.10 PVC Sewer pipe and fittings shall be installed in accordance with ASTM D2321, “Standard Practice for Underground Installation of Thermoplastic Pipe for Sewers and Other Gravity-Flow Applications.” 3.4.1.11 PVC Pipe meeting the standards of AWWA C900 for potable

water shall be installed in standards lengths of 20 feet for all sizes.

3.5 SETTING VALVES AND VALVE BOXES

3.5.1 Center valve boxes on the valves, setting plumb. The weight of the valve box shall not be supported by the valve or pipe. No part of the valve box shall rest directly on the pipe or valve. Support the valve box with solid concrete, bricks or blocks.

3.5.2 Tamp earth fill around each valve box to a distance of four feet on all sides, or to the undisturbed trench face if less than four feet.

3.5.3 Tighten stuffing boxes, and fully open and close each valve to assure that all parts are in working condition.

3.5.4 In cases where the valve box is to be buried, the top of valve box shall be one foot below grade.

3.6 THRUST BLOCKS

3.6.1 General 3.6.1.1 Provide thrust blocks, or metal tie rods and clamps or lugs, on plugs, caps, tees, and bends deflecting 22-1/2 degrees or more either vertically or horizontally, and on lines 4 inch diameter or larger.

JUNE 2026 02600-10 YARD PIPING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project a Provide restrained joints in lieu of thrust blocks where shown on the Contract Drawings.

3.6.1.2 Provide concrete thrust blocking with a compressive strength of 2500 psi in 28 days.

3.6.2 INSTALLATION

3.6.2.1 Locate thrust blocking between solid ground and the fitting to be anchored.

3.6.2.2 Unless otherwise shown or directed by the Owner, place the base and thrust bearing sides of thrust blocking directly against undisturbed earth.

3.6.2.3 Place thrust blocking so the fitting joints will be accessible for repair.

3.6.2.4 Protect steel rods and clamps by galvanizing or by coating with bituminous paint.

3.7 CLOSING IN UNINSPECTED WORK

3.7.1 Do not cover up or enclose work until it has been properly and completely inspected and approved.

3.7.2 Should any of the Work be covered up or enclosed prior to all required inspections and approvals, uncover the Work as required and, after it has been completely inspected and approved, mark all repairs and replacements with such materials as are necessary to the approvals of the Engineer and at no additional cost to the Owner.

3.8 AS-BUILT DRAWINGS

3.8.1 During the progress of the Work, the Contractor shall maintain an accurate record of the location of the piping with reference to the job base line, grades, and elevations. Show all changes made in the piping installation from the layout and materials shown on the Contract Drawings.

3.9 TESTING AND INSPECTING

3.9.1 All pressure pipes shall be pressure and leakage tested in accordance with AWWA C-600 and as specified herein.

3.9.2 Any defective work which shows up while conducting tests or before conditional acceptance shall be replaced or repaired by the Contractor at his own cost and expense. Any leaks occurring after conditional acceptance but before final acceptance due to either blown joints or cracked pipe or fittings, shall be repaired by the Contractor at his own expense.

3.9.3 Closing uninspected work: Do not allow or cause any of the Work of this section to be covered up or enclosed until after it has been completely inspected and tested and has been approved by the Engineer.

JUNE 2026 02600-11 YARD PIPING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.9.4 Hydrostatic/Leakage Testing 3.9.4.1 Where any section of pipe is provided with concrete thrust blocking for fittings, do not make hydrostatic tests until at least five days after installation of the concrete thrust blocking, unless otherwise directed by the Engineer.

3.9.4.2 Pipelines to be tested in sections shall be valved or bulkheaded to the satisfaction of the Engineer.

3.9.4.3 All testing shall be witnessed by the Owner or the Owner’s representative. The Contractor shall provide the Owner and the Engineer written notice three (3) days prior to beginning any hydrostatic/leakage testing.

3.9.4.4 The line shall be slowly filled with water and the test pressure (150 psi) developed by means of a pump. The test pressure shall be achieved at the highest point in the pipe being tested. A tapped connection for filling the line shall be located at the lowest point of the section being tested. Care should be taken to ensure no air is trapped in the pipe. It may be necessary for the Contractor to install corporation stops in the line to successfully

expel all air from the pipes.

3.9.4.5 After the test pressure has been achieved everywhere in the section being tested, the test shall begin and shall last for two hours. During the two hour test, the pressure shall not drop below 145 psi at the highest point in the system. If the pressure drops below 145 psi at the highest point in the system, the test shall be considered a failure, and the Contractor shall make repairs at his

cost to keep the pressure from dropping. The hydrostatic/leakage test shall be performed after the Contractor has made the needed repairs and shall follow the same method as described in 3.10.4.3 and 3.10.4.4. The testing and repair procedure shall continue until the highest point in the tested section remains above 145 psi for the entire duration of the hydrostatic/leakage test (2 hours).

3.9.4.6 Devise a method for disposal of waste water from hydrostatic tests, and for disinfection, as approved in advance by the Engineer.

3.9.5 Pressure tests 3.9.5.1 After the pipe is laid, the joints completed, and the trench partially backfilled leaving the joints exposed for examination, subject the newly laid piping to a hydrostatic pressure of 150 psi.

3.9.5.2 Open and close each valve several times during the test.

JUNE 2026 02600-12 YARD PIPING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.9.6 Carefully examine exposed pipe, joints, fittings, and valves.

3.9.7 Replace and remake joints showing visible leakage.

3.9.7.1 Remove cracked pipe, defective pipe, and cracked or defective joints, fittings, and valves. Replace with sound material and repeat the test until results are satisfactory.

3.9.7.2 Make repair and replacement without additional cost to the Owner.

3.9.8 Low Pressure Air Test 3.9.8.1 All gravity flow sewer piping and appurtenances shall be tested with low pressure air in accordance with the air test tables at the end of this Section and the following procedures:

a Test plugs shall be supplied and installed by the Contractor within the pipeline at each manhole. Each plug shall be securely braced.

b If the pipeline to be tested is expected to be below the groundwater table, the Engineer may visually inspect the trench prior to backfilling to determine the elevation of the groundwater table. In lieu of this, the Contractor shall either install a small diameter perforated vertical pipe from the invert elevation of the sewer to the surface before backfilling, or shall insert a pipe probe by boring or

driving into the backfill material adjacent to the invert elevation of pipe and determine the depth of the groundwater level above the pipe invert immediately before air testing the sewer. All gauge pressures for the test shall be increased by an amount to provide 4 psig above the back pressure due to groundwater submergence over the end of the probe to a maximum of 6 psi in the pipe system to be tested except as required

by 3.7.7.8 below. After the pipe line has passed the low pressure air test, the small diameter vertical pipe shall be either withdrawn, filling the hole with concrete while removing the pipe; or abandoned in place by filling with concrete or bentonite and cutting the pipe off at least 2 feet below the finished surface.

c If the air pressure required for the test is greater than 6 psig at the downstream end, the pipe line shall not be air tested; but rather shall be tested for infiltration in accordance with method indicated in this Section.

d The Contractor shall add air slowly to the portion of the pipe line under test until the internal pressure is raised to

JUNE 2026 02600-13 YARD PIPING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 4.0 psig greater than the average back pressure of any groundwater above the pipe's invert.

e The Contractor shall not allow personnel in manholes after the air pressure is increased in the sewer. If the test plug is suspected of leaking, the Contractor shall first relieve the pressure before any adjustments are made to eliminate air leakage at the plug. The Contractor may precoat the plug with a soap solution to check for leakage.

f The Contractor shall allow the air temperature to stabilize for at least 2 minutes by adding only the amount of air required to maintain 4.0 psig above groundwater back pressure. After this 2 minute period, the Contractor shall completely disconnect the hose and compressor from the selection being tested to assure no additional air is added to the pipe line.

g The time required for the pressure to drop 1 psig will be observed and recorded. Pipe lines which fail to maintain the stipulated pressure for a period equal to or greater than the holding time shown in the tables at the end of this Section shall be deemed to have failed the low pressure air test and will not be accepted by the County.

3.10 DISINFECTION OF WATER LINES

3.10.1 Disinfection procedures shall be completed in accordance with AWWA C- 651, Maryland Department of the Environment regulations, and as specified herein.

3.10.2 Prior to disinfection, all new, replacement and exposed portions of existing systems shall be flushed clean to the satisfaction to the Engineer at a velocity of 2-1/2 feet per second according to one of the methods outlined in AWWA C-651.

3.10.3 The water system, from the point of water main interception and individual connections to structures, shall be disinfected according to one of the methods of AWWA C-651. The Engineer shall be present to inspect the method of disinfection used and confirm test results.

3.10.4 All labor, tools, materials, equipment, gauges and meters, necessary for making the tests and chlorinating these mains shall be furnished by the Contractor.

3.10.5 Where necessary, water used for disinfection shall be properly disposed by the Contractor in accordance with a method approved by the Engineer and Maryland State of the Environment. If the water is heavily chlorinated it should be neutralized prior to disposal.

JUNE 2026 02600-14 YARD PIPING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.10.6 Unless otherwise specified herein, water remaining in the water lines should be dechlorinated to levels less than or equal to 0.15 ppm. In no case will the Contractor be required to flush the water lines to chlorination levels less than that found in the existing potable source.

END OF SECTION

JUNE 2026 02600-15 YARD PIPING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 03300

CAST-IN-PLACE CONCRETE

1.0 GENERAL

1.1 Description 1.1.1 This section includes providing normal weight cast-in-place concrete to the sizes and shapes and to the locations indicated on the Contract Drawings, as well as steel reinforcement and accessories, in accordance with ACI 301/ACI 318/ACI 350, as required, and in accordance with the Contract Documents..

1.1.2 Design strength 1.1.2.1 Design strength shall be as shown on the Contract Drawings. If not indicated on the Contract Drawings, strength of concrete shall be in accordance with Table 3300-2.

1.2 Related Work 1.2.1 01300 – Submittals 1.2.2 02200 – Earthwork 1.2.3 03360 – Pre-Cast Concrete 1.2.4 03600 – Grout 1.2.5 05500 – Miscellaneous Metals 1.2.6 09900 – Finishes 1.3 Quality Assurance 1.3.1 Standards 1.3.1.1 AASHTO M31 – Deformed and Plain Carbon and Low-Alloy Steel Bars for Concrete Reinforcement 1.3.1.2 AASHTO M182 – Burlap Cloth Made from Jute or Kenaf and Cotton Mats 1.3.1.3 AASHTO T23 – Making and Curing Concrete Test Specimens in

the Field 1.3.1.4 AASHTO T119 – Slump of Hydraulic Cement Concrete 1.3.1.5 AASHTO T152 – Air Content of Freshly Mixed Concrete by the Pressure Method 1.3.1.6 AASHTO T196 – Air Content of Freshly Mixed Concrete by the Volumetric Method 1.3.1.7 ACI 214 – Guide to Evaluation of Strength Test Results of Concrete 1.3.1.8 ACI 301 – Specifications for Structural Concrete 1.3.1.9 ACI 305 – Guide to Hot Weather Concreting

1.3.1.10 ACI 306 – Guide to Cold Weather Concreting

JUNE 2026 03300-1 CAST-IN-PLACE CONCRETE

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 1.3.1.11 ACI 315 – Guide to Presenting Reinforcing Steel Design Details 1.3.1.12 ACI 318 – Building Code Requirements for Structural Concrete and Commentary 1.3.1.13 ACI 350 – Code Requirements for Environmental Engineering Concrete Structures 1.3.1.14 ASTM A615 – Standard Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement

1.3.1.15 ASTM A1064 – Standard Specification for Carbon-Steel Wire and Welded Wire Reinforcement, Plain and Deformed, for Concrete 1.3.1.16 ASTM C150 – Standard Specification for Portland Cement 1.3.1.17 ASTM C171 – Standard Specification for Sheet Materials for Curing Concrete 1.3.1.18 ASTM C309 – Standard Specification for Liquid Membrane- Forming Compounds for Curing Concrete 1.3.1.19 ASTM C470 – Standard Specification for Molds for Forming

Concrete Test Cylinders Vertically 1.3.1.20 ASTM D994 – Standard Specification for Preformed Expansion Joint Filler for Concrete (Bituminous Type) 1.3.1.21 ASTM D1751 – Standard Specification for Preformed Expansion Joint Filler for Concrete Paving and Structural Construction (Nonextruding and Resilient Asphalt Types) 1.3.1.22 ASTM D1752 – Standard Specification for Preformed Sponge Rubber, Cork, and Recycled PVC Expansion Joint Fillers for

Concrete Paving and Structural Construction 1.3.1.23 ASTM D2103 – Standard Specification for Polyethylene Film 1.3.1.24 ASTM D5893 – Standard Specification for Cold-Applied, Single- Component, Chemically Curing Silicone Joint Sealant for Portland Cement Concrete Pavements 1.3.1.25 Concrete Reinforcing Steel Institute Manual of Standard Practice 1.3.2 Field Testing 1.3.2.1 Testing shall be performed by the County except where

otherwise indicated herein.

1.3.2.2 Reinforcement a Provide visual means of identification of reinforcing steel, size and strength, and welded wire fabric designation, in accordance with CRSI manual of standard practice.

b Tolerances i Reinforcing bars shall be cut and bent within the following tolerances:

JUNE 2026 03300-2 CAST-IN-PLACE CONCRETE

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

a) Sheared Length: Plus, or minus 1 inch for #3

to #11 bars inclusive and 2 inches + for #14 and #18 bars.

1. Depth of Truss Bars: Plus 0, minus 1/2

inch.

2. Stirrups, Ties, and Spirals: Plus, or

minus 1/2 inch.

3. All Other Bends: Plus, or minus 1 inch.

1.3.2.3 Concrete a Concrete strength testing will be performed by the County at the frequency defined within this specification. The Contractor will be responsible for any required retests, using the same testing laboratory as was used by the County.

b Three (3) of the nine (9) sample cylinders shall be broken at 7 days, three (3) cylinders at 28 days, and three (3) at 56 days (if necessary). One slump, temperature, and air test will be taken for each set of test cylinders. Samples shall be 4” x 8”.

c Control testing shall be performed in accordance with the following requirements:

Tests Method Sampling Frequency Responsibility Slump* AASHTO T 119 1 per 50 cubic yards or Testing Technician fraction thereof with at least one test per pour, per structure, per day Air Content AASHTO T 152 1 per 50 cubic yards or Testing Technician or T 196 fraction thereof with at least one test per pour, per structure, per day Compression AASHTO T 23 1 per 50 cubic yards or Testing Technician fraction thereof with at

least one test per pour, per structure, per day *If the first test fails, a second test shall be run. Acceptance or rejection shall be on the basis of second test.

1.3.2.4 The air content shall be determined in accordance with AASHTO T152 or T196. The slump shall be determined in accordance with AASHTO T119 and shall conform to the requirements included in table 3300-2. Compression test specimens shall be made in accordance with the provisions of AASHTO T23. An average of three (3) 28-day strength cylinders shall be used for the purpose of mix approval. Curing facilities, fabrication and removal of

specimens from molds after the specified curing period and delivery of same to the approved laboratory will be the responsibility of the Contractor.

JUNE 2026 03300-3 CAST-IN-PLACE CONCRETE

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 1.3.2.5 Acceptance of materials shall be based on the requirements outlined in Table 3300-2 1.3.2.6 Leak Testing of the PAR Tank a Leakage testing shall be performed on the PAR structure in accordance with ACI 350. The following are main points of the testing, but the document shall be reviewed by the Contractor for the full testing requirements.

b The PAR shall be structurally complete and capable of resisting the hydrostatic pressure of the test water before testing is completed.

c Ensure the concrete has met the required concrete strength to withstand the hydrostatic pressure of the water and seal all outlets in the PAR structure. Then fill the PAR with water.

d Monitor the PAR outlets for leaks, the sump outlet for any increase inflow, and the concrete joints for any visible leakage from the structure. Correct any visible leakage.

Keep the PAR full for a minimum of 3 days.

e Measure the water surface height in the PAR and the temperature of the water. Inspect the exterior of the PAR for any indication of leaking. Repeat these measurements/inspections every 24 hours.

f Correct any leakage deficiencies identified by the test and then retest the structure.

g Refer to ACI 350 for the detailed test procedure and duration.

1.4 Defective Work 1.4.1 Porous areas, open or porous construction joints, and honeycombed concrete indicate that all of the requirements for mixing, placing, and handling have not been complied with and shall be considered as sufficient cause for rejection of the members of the structure thus affected. Defective work exposed upon removal of forms shall be entirely removed or repaired within 48 hours after forms have been removed.

1.4.2 No repaired area will be accepted unless:

1.4.2.1 The structural requirements have not been impaired by reducing the net section of compression members.

1.4.2.2 The bond between the steel and concrete has not been reduced.

1.4.2.3 The areas shall be finished so as to blend in every respect with the texture, contour, and color of the surrounding concrete.

1.4.3 If the above limitations cannot be satisfied, the members or unit involved shall be removed and satisfactorily replaced entirely at the Contractor's expense.

JUNE 2026 03300-4 CAST-IN-PLACE CONCRETE

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 1.4.4 Defective areas shall be cut out to such depth that all voids, honeycombed, or any other defect are entirely removed. The edges of the material remaining in place shall be cut perpendicular to the finished surface to the full depth of the material removed but not less than 1 inch.

1.4.5 If the removal of defective concrete affects the structural requirements as defined above, the member likewise shall be removed and replaced.

1.5 Submittals 1.5.1 Reinforcement 1.5.1.1 For all reinforcing bars, submittals shall contain the following data, lists, and information; bar lists, placement plans, and bending diagrams; description, details, dimensions, and locations of each item; and detail reinforcing in accordance with the requirements of ACI 315 Details and Detailing of Concrete Reinforcement.

1.5.2 Concrete 1.5.2.1 Mix Design a Submit certified concrete mix designs including proposed ad mixtures.

i Submit cylinder test results for the various mix designs showing compressive strength at 2, 7, and 28 days.

b Ingredients i Submit with the mix design, laboratory test reports and mill or manufacturer's certificates attesting to the conformance of ingredients with these specifications.

Use ingredients in the design mix which are representative samples of the materials to be used in the contract work.

ii In case the source, brand, or characteristic properties of the ingredients need to be varied during the term of the contract, submit revised laboratory mix report, in conformance with the above procedures.

1.5.2.2 Delivery Tickets a Provide to the Owner’s representative a delivery ticket from the concrete supplier with each batch delivered to the site setting forth the following information.

i Name of Supplier ii Name and location of batch plant and name of plant inspector.

iii Ticket number.

iv Load number (batch number).

JUNE 2026 03300-5 CAST-IN-PLACE CONCRETE

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project v Date and truck number.

vi Destination including name and location of Contract.

vii Concrete type, brand, and design mix designation number.

viii Actual quantities of all materials including admixtures and amount of concrete in cubic yards.

ix Specific class and type of concrete (in conformance with the specification requirements) x Weight of cement xi Maximum size of aggregates xii Weights of coarse and fine aggregates, respectively xiii Kind and amount of admixtures xiv Time at which mixer drum was charged with cement.

xv Amount of free moisture by percentage of permissible mixing water in aggregates, plus maximum amount of mixing water which can be added at job site to obtain specified water/cement ratio.

xvi Blank space for initials of on-site receiving party.

1.5.2.3 A certified copy of the mill test on each load of reinforcing steel delivered showing physical and chemical analysis shall be provided, prior to shipment. The County reserves the right to require the Contractor to obtain separate test results from an independent testing laboratory in the event of any questionable steel. When such tests are necessary because of failure to comply with this Specification, such as improper identification,

the cost of such tests shall be borne by the Contractor.

2.0 MATERIALS

2.1 Reinforcement 2.1.1 General 2.1.1.1 Reinforcing steel shall conform to the requirements of ACI 318/ACI 350.

2.1.1.2 Field welding of reinforcing steel will not be allowed.

2.1.1.3 Use of coiled reinforcing steel will not be allowed.

2.1.2 Bar Reinforcement 2.1.2.1 Reinforcing bars shall comply with requirements of ASTM A-615, minimum yield strength of 60,000 psi unless other indicated, as modified in accordance with ACI 350.

2.1.3 Tie or Dowel Bars

JUNE 2026 03300-6 CAST-IN-PLACE CONCRETE

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.1.3.1 Tie or dowel bars shall be round steel bars meeting the requirements of AASHTO M 31, Grade 60.

2.1.4 Welded Steel Wire Fabric 2.1.4.1 Welded wire fabric shall comply with requirements of ASTM A1064, size and spacing of wires as indicated on the Contract Drawings.

2.1.5 Reinforcement Accessories 2.1.5.1 Reinforcing accessories shall conform with the requirements of CRSI Manual of Standard Practice.

2.2 Concrete 2.2.1 Admixtures 2.2.1.1 Air entraining admixture shall conform to ASTM C260, except that the compressive strength of the concrete mix shall be maintained. The admixture shall be compatible with the other components of the concrete design mix. Air entraining admixture shall be Darex II as manufactured by W. R. Grace; or equal.

2.2.2 Water reducing and retarding admixtures may be used. The concrete plant is responsible for the compatibility of admixtures.

2.2.2.1 Admixtures containing calcium chloride, thiocyanate or more than 0.05 percent chloride ions are not permitted. The addition of admixtures to prevent freezing is not permitted.

2.2.2.2 The Contractor shall submit manufacturer's data including the chloride ion content of each admixture and certification from the admixture manufacturer that all admixtures utilized in the design mix are compatible with one another and properly proportioned prior to mix design submittal review.

2.2.3 Appurtenant Materials 2.2.3.1 Vapor Barrier a Building paper shall be sisal-kraft building paper, conforming to requirements of ASTM C171.

b Polyethylene sheeting shall be 0.006 inch thick, conforming to requirements of ASTM D2103.

2.2.3.2 Curing Materials a Curing paper shall conform to requirements of ASTM C171, type I, and shall be flame resistant. Use only nonstaining material over all surfaces to remain permanently exposed.

b Curing compound shall conform to requirements of ASTM C309, White Pigmented Type II.

c Sheet materials shall conform to requirements of ASTM C171.

JUNE 2026 03300-7 CAST-IN-PLACE CONCRETE

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project d Burlap cloth for curing shall be jute, kenaf or hemp and shall conform to requirements of AASHTO M-182, Class I, II or III.

2.2.3.3 Expansion Joint Filler a Filler not exposed to traffic and weather shall conform to requirements of ASTM D994.

b Filler exposed to traffic and/or weather shall conform to requirements of ASTM D1751/ASTM D1752.

2.2.3.4 Temporary wood joint filler shall be straight, sound strips, of width and depth indicated or approved and tapered slightly from faceto-back; coated with paraffin, or equivalent, to seal against moisture and to promote ready removal with forms; and shall produce true straight joint edges.

2.2.3.5 Joint Sealer a Sealer shall be cold applied and conform to requirements of ASTM D5893.

2.2.3.6 Water Stops a Waterstops for water bearing interior and exterior structures and for moving joints shall be nine inches long, three bulb, 3/8 inch minimum diameter rubber or neoprene waterstops conforming to requirements of U.S.

Corps of Engineers Specifications CRD-C513.

b Waterstops for non-moving joints requiring waterstops shall be six inches long, two bulb, 3/8 inch minimum diameter polyvinyl chloride waterstops conforming to requirements of U.S. Corps of Engineers' Specifications CRD-C572.

c Provide manufactured special accessories at intersections.

d Field splices shall be cut on a 45 degree angle and shall be heat sealed and shall develop a water tightness equal to that of unspliced material and shall have tensile strength of not less than 50 percent of unspliced material.

2.2.3.7 Bonding compound shall conform to requirements of MIL-R- 19235B.

2.2.3.8 Coat aluminum accessories and imbedded items with an inert compound capable of effecting isolation of the deleterious effect of the aluminum on the concrete.

2.2.3.9 Form Release Compounds a Form release compounds shall effectively prevent the bonding of the concrete to the forms. The form release compounds shall not cause discoloration of the concrete nor adversely affect the quality or rate of hardening at the

JUNE 2026 03300-8 CAST-IN-PLACE CONCRETE

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project interface of the forms. The compounds will be tested in accordance with MSMT 503.

b The flash point of the material shall not be less than 100°F when tested in accordance with AASHTO T 73.

2.2.4 Cement shall conform to requirements of ASTM C150, Types I and II. Type II shall be used for structures in contact with wastewater.

2.2.5 Forms of an approved design shall be furnished by the Contractor and securely fastened and braced to prevent movement during the placing of concrete. Both wood and steel forms shall be properly designed, approved by the County, and installed so as to resist all working stresses without buckling or warping. The condition and stability of the forms shall produce a structure that will meet the required tolerance of deviations not exceeding

one-quarter inch in ten feet in either grade or alignment. Before placing concrete against any forms, they shall be thoroughly cleaned and oiled each time they are used.

3.0 EXECUTION

3.1 Reinforcement 3.1.1 Fabrication 3.1.1.1 General a After bar lists and bending diagrams have been approved, fabricate each unit of reinforcement to the type, shape, size, grade, and dimensions shown on the approved shop drawings.

3.1.1.2 Cutting and Bending a Perform cutting and bending of reinforcing bars before shipment to the site. Bend all bars cold in a manner that will not injure the material and in accordance with the Manual of Standard Practice of the Concrete Reinforcing Steel Institute.

3.1.1.3 Bar Support and Spacers a Support bars by means of bolsters or chairs with no less than the minimum required by ACI 315, Details and Detailing of Concrete Reinforcement.

b Reinforcing steel in the bottom of slabs resting on earth may be supported by concrete, brick, or mortar blocks.

c Hold reinforcing steel in position in walls, columns, piers, and abutments by means of mortar blocks, bar supports, or spacers wired to reinforcing steel.

d Do not use stones, clay bricks, wood blocks, or pieces of broken concrete to support reinforcing steel.

e Do not place bars or fabricated mats on layers of fresh concrete as the work progresses.

JUNE 2026 03300-9 CAST-IN-PLACE CONCRETE

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.1.2 Shipping, Handling, and Protection of Material 3.1.2.1 Reinforcing steel bars shall be shipped in standard bundles and tagged and marked in accordance with the provisions of the Code of Standard Practice of the Concrete Reinforcing Steel Institute. Bundles shall be kept intact and material undamaged and properly identified until ready for use.

3.1.2.2 Tag each bundle at the mill with a waterproof tag showing the name of the mill and heat number, the grade and size of the bars, and identifying number.

3.1.2.3 Reinforcing steel bars shall be stored on blocking, racks, or platforms so as not to be in contact with the ground.

3.1.2.4 Bars shall be kept free from dirt, paint, oil, grease, loose or thick rust, detrimental mill scale, other foreign substances and rust causing conditions. However, when steel has on its surface detrimental rust, mill scale, dust, or dirt, it shall be cleaned by a method approved by the Owner or Owner’s Representative.

3.1.3 Placing and Fastening 3.1.3.1 The placing of bars shall conform to the recommended practices in "Placing Reinforcing Bars" as published by the Concrete Reinforcing Steel Institute.

3.1.3.2 Reinforcing steel shall be accurately placed in the position shown on the plans and firmly held during the depositing and setting of the concrete. Cover, or the distance between the external face of the bar and the face of the finished concrete, shall be as indicated on the Plans. Reinforcing steel bars embedded in concrete shall not be bent after they are in place. Bars shall be tied at all

intersections with 16 1/2 gage black annealed wire except that where spacing is less than 1 foot each direction alternate intersections need not be tied. All intersections shall be tied in the top mat of reinforcement placed on the top slabs of box culverts.

Abrupt bends shall be avoided except where one steel bar is bent around the other. Stirrups and ties shall always pass around the outside of main bars and be securely attached thereto. All reinforcing steel shall be securely held at the proper distance from the forms by means of plastic coated steel chairs. Blocks for holding reinforcement away from contact with earth shall be precast concrete blocks of approved shape, mix, and dimensions

and shall have tie wires embedded in them. Layers of bars shall be separated by approved plastic coated metal chairs or bolsters.

3.1.3.3 Any broken or damaged concrete spacer blocks shall be removed before concrete is placed. The use of pebbles, pieces of broken stone or brick, metal pipe, or wooden blocks as spacers will not be permitted. Reinforcing steel when placed in the work shall be free from flake rust, dirt, and foreign material before any concrete is placed. Any mortar which may be adhering to the reinforcing steel shall be removed. No concrete shall be

JUNE 2026 03300-10 CAST-IN-PLACE CONCRETE

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project deposited until the County has inspected the placing of the reinforcing steel and given permission to place the concrete. Any bars of incorrect size, length, or shape shall be removed and replaced with correct bars. Any bars located or spaced incorrectly shall be relocated or spaced correctly before permission is given to place concrete, and such replacements and corrections shall

be at the Contractor's expense. All concrete placed in violation of these provisions shall be rejected and removed.

3.1.3.4 Tolerances for Placing Reinforcing Steel a Variation of protective coating 2-inch cover: 1/4 inch b Variation of protective coating 3-inch cover: 1/2 inch c Variation from indicating space: 1 inch 3.1.4 Splicing 3.1.4.1 Reinforcement shall be furnished in full lengths as indicated on the Contract Documents. Splicing, except where shown on the Drawings, will not be permitted without written approval from the

County; and if additional splices are used, the additional weight occasioned by such splices shall be at the Contractor's expense.

3.1.4.2 All splices shall conform to Class "B" in ACI 318 or as shown on the Plans. Splices shall be well distributed where conditions permit. Except where otherwise shown on the Plans, lap splices shall be made with the bars placed in contact and wired together.

Lapped splices for reinforcement shall not be used for bar sizes larger than No. 11.

3.1.4.3 No welding of reinforcing steel or attachments thereto will be permitted without written authorization by the Owner or Owner’s Representative.

3.1.5 Inspection 3.1.5.1 Deposit concrete only when the placement of the reinforcement has been checked and approved by the Owner/Owner’s Representative. The Contractor shall provide notice to the Owner at least 48 hours in advance of any contemplated concrete pour.

3.1.6 Embedment 3.1.6.1 Place reinforcement so that there will be a clear distance of at least 2 inches between the reinforcement and any anchor bolts or other embedded metal work.

3.1.7 Concrete Protection for Reinforcement 3.1.7.1 Reinforcement shall be protected by the thickness of concrete indicated in the Contract Drawings. Where not otherwise shown, the thickness of concrete over the reinforcement shall be as follows:

a Where concrete is deposited against the ground without the use of forms - not less than 3 inches.

JUNE 2026 03300-11 CAST-IN-PLACE CONCRETE

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project b Where concrete is exposed to weather, ground, sewage, or sewage gases, but placed in forms - not less than 2 inches c In slabs and walls not exposed to ground, weather, sewage or sewage gases - not less than 3/4 inch.

d In beams, girders, and columns not exposed to ground, weather, sewage, or sewage gases - not less than 1-1/2 inches.

3.2 Concrete 3.2.1 Design Mix 3.2.1.1 Mix Proportioning a The concrete ingredients with the exception of water shall be proportioned by weight. Water may be proportioned by volume. The mix shall be homogeneous, readily placeable, uniformly workable and meet the requirements of table 3300-2.

b Required average strength: these requirements are applicable to mixes Nos.1 through 6 and the 5,000 psi mix. Required average strength is in accordance with ACI 214 with the following exceptions:

i A specimen is defined as consisting of one cylinder, and a test is defined as the average strength of three cylinders, assuming 4” x 8”specimen cylinders .

Statistical computations are based on a population size of thirty or more specimens. To estimate standard deviation and coefficient of variation. (N-1) will be used as divisor.

ii A probability of not more than one in ten tests falling below the specified strength will be used to compute the required average strength for the following conditions:

a) When past performance record are

available: the documented performance records of the producer consisting of a minimum of thirty consecutive twenty-eight day strength specimens from a similar project having the same mix used within the last one year shall be analyzed to establish a coefficient of variation. The required average strength will be determined on the basis of the computed coefficient of variation.

b) When performance records are not available:

a coefficient of variation of 20 percent shall be used to compute the required average strength for mixes nos. 1 through 5. The

JUNE 2026 03300-12 CAST-IN-PLACE CONCRETE

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project required average for mix no. 6 shall be based on a coefficient of variation of 15 percent.

iii The Contractor shall furnish the necessary molds conforming to ASTM C470, except that paper molds will not be used.

3.2.1.2 Formwork design and construction a Design, engineering and construction of formwork shall be the responsibility of the Contractor.

i Chamfer all exposed concrete corners of edges not less than 3/4 inch in dimension.

ii Removable form ties will not be permitted in water retaining structures.

b Design and construct to support loads in accordance with ACI-347 within the tolerances specified in ACI 301.

c Provide form coatings as required to produce desired finish.

d Schedule for removal of forms, falsework and centering.

i Maintain forms, falsework and centering in place until the concrete has attained the minimum percentage of strength listed below in schedule 1. When approved by the Owner/Owner’s Representative, values between schedule 1 and schedule 2 may be used for removal and shall consider, where applicable, the following: the ratio of dead load to live load, span, height, shape, ratio of rise to span reshoring,

prevailing site conditions.

a) Minimum percent of specified 28 days design

strength, f'c

JUNE 2026 03300-13 CAST-IN-PLACE CONCRETE

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

Schedule 1 Schedule 2

Footings; sides of beams, 25 20 slabs and Beams on grade Free standing walls, columns 50 30 and Piers Exter. walls, retain. walls 50 30 Roofs 80 50 Stairways 80 60 Soffits of beams, slabs and 80 60 girders under 20 ft. clear span between supports Over 20 ft. clear span 90 70 between supports Cantilevers, canopy 90 70 e The use of earth cuts in undisturbed earth as forms for small foundations will be permitted provided cuts are

vertical, sharp and true.

3.2.2 Mixing 3.2.2.1 Batch mixing will not be allowed without the approval of the Owner/Owner’s Representative.

3.2.3 Placing 3.2.3.1 Place reinforcement with concrete cover as specified in ACI 318/350 unless otherwise indicated.

3.2.3.2 Notify the County before placing concrete. Wet down formwork and reinforcement before placing concrete so as to prevent leaching of water from concrete, but do not allow free water standing in the forms.

3.2.3.3 Place concrete within 90 minutes after cement has been mixed with aggregate and within 45 minutes after addition of water and admixtures. Discard concrete which has not been placed within these time limits off site. The free drop of concrete shall not exceed five feet without the use of adjustable length pipes.

3.2.3.4 Locate joints where indicated on the drawings. If not noted, provide control joints as follows:

a Provide bond breaker with 1/2 inch expansion joint material at junction of walls, bases and columns.

JUNE 2026 03300-14 CAST-IN-PLACE CONCRETE

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project b Provide 1/2 inch expansion joint material at changes in direction of slabs, or abrupt changes in width and not greater than twenty (20) feet apart on slabs without control joints.

c Seal control joints in exterior slabs.

3.2.4 Cold Weather Concreting 3.2.4.1 Procedures for protection of concrete against damage by frost during the making and early curing period shall be as noted in the “Recommended Practice for Cold Weather Concreting, ACI- 306,” but no acceleration will be allowed.

3.2.4.2 Concrete, when placed in the form, shall have a temperature not less than 60 degrees F, nor more than 80 degrees F. Freshly placed concrete and the surrounding air shall be maintained at a temperature of 50 degrees F, or greater for a period of 7 days after placing. The methods of protection and curing shall be such as to prevent evaporation of moisture from the concrete and injury to the surface.

3.2.4.3 The Contractor shall have available enough tarpaulins, insulating devices, and/or other suitable materials to enclose or protect all portions of the concrete requiring protection. As much as possible of the aforesaid devices and materials shall be installed before placing the concrete, and the remainder shall be installed as rapidly as possible to keep exposure to cold weather to a minimum. Where heating is required, the spaces to be heated

shall be completely enclosed and the temperature therein kept at required levels using approved heaters.

3.2.4.4 Insulated devices (wrappings), if proposed for use, shall first be submitted to the Owner/Owner’s Representative for approval;

and if acceptable, they may be used, provided that satisfactory protective performances under prior usage can be verified.

Where the insulating devices are in tight contact with forms of concrete surfaces, satisfactory instruments and usage thereof shall be devised and placed in operation to prove to the Owner/Owner’s Representative that required temperatures are being maintained under the insulators.

3.2.4.5 The Contractor shall provide a sufficient number of maximum/minimum recording thermometers to record the temperatures in each concrete pour undergoing cold weather protection.

3.2.4.6 The responsibility for defective concrete by reason of heating or lack of heating, or any other hazards incidental to cold weather concreting, shall remain with the Contractor; and such defective concrete shall be replaced by the Contractor at the Contractor’s sole expense.

3.2.5 Hot Weather Concreting

JUNE 2026 03300-15 CAST-IN-PLACE CONCRETE

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.2.5.1 During hot weather, the manufacture, placement, and curing of the concrete shall conform to the “Recommended Practice for Hot Weather Concreting,” ACI 305, and as specified herein.

3.2.5.2 The ingredients may be required to be cooled to keep the temperature of the concrete within the limits shown in ACI 305.

Forms and reinforcing steel may be required to be protected from direct rays of the sun and cooled by sprinkling. Concrete in place shall be protected in order to minimize drying and absorption of heat. To prevent too rapid stiffening, the quantity of the retarding admixture shall be increased, as required.

3.2.5.3 Concrete, when poured, shall have a maximum temperature of 90 degrees F.

3.2.6 Curing and Protection 3.2.6.1 Concrete shall be cured in one of the following methods:

a Polyethylene membrane shall be placed as soon as practicable without injury to the finished concrete. The polyethylene shall be rolled out and held in place temporarily by a window of earth placed just outside the forms. The polyethylene shall be lapped about 12 inches and be held with sand.

b Non-bituminous liquid curing compound shall be applied before any marked dehydration has taken place, covering the structure by means of an approved hand or motordriven spray operated at a pressure of not less than 40 pounds nor more than 60 pounds per square inch. Apply uniformly at a rate of not less than 0.034 nor more than 0.040 gallons per square yard. Unless the surface is completely sealed with one application, additional

material shall be added as directed. Sealer shall be admitted for approval and shall be non-staining.

3.2.6.2 Warm Weather a All concrete shall be adequately protected from injurious action by the sun. Fresh concrete shall be protected from heavy rains, flowing water, and mechanical injury. All concrete shall be kept wet for a period of not less than 7 days by covering with water or an approved watersaturated covering, or by a system of perforated pipes or mechanical sprinklers, or any other approved method

which will keep all surfaces continuously (not periodically) wet. Where wood forms are left in place for curing, they shall be kept wet at all times to prevent opening at joints and drying out of the concrete. Water for curing shall be generally clean and entirely free from any elements which, in the opinion of the Owner/Owner’s Representative, might cause straining or discoloration of the concrete.

JUNE 2026 03300-16 CAST-IN-PLACE CONCRETE

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.2.6.3 Cold Weather a Concrete, when placed during cold weather, shall be kept moist and provided with adequate protection for a period of not less than 14 days, as specified under “Warm Weather”, and subject to the approval of the County, so that the air in contact with the concrete will be maintained at temperatures between 50 degrees and 70 degrees F

for at least the first 7 days of the curing period.

3.2.7 Finishes 3.2.7.1 General a Concrete surfaces shall be finished in accordance with one of the following designations. Unless otherwise specified, all concrete work shall have a "Grout Finish" for vertical surfaces and "Troweled Finish" for horizontal surfaces. Any concrete structure or concrete work that exhibits surfaces with defective finish will not be accepted until finishing has been completed in accordance with the

Specifications. All concrete surfaces shall be finished within 24 hours after the forms are removed.

Application Finished Designation Structures For all concrete surfaces not Rough Form Finish exposed to public view and not to be waterproofed For all concrete wall surfaces Grout Finish exposed to public view Upper Horizontal Surfaces Top of Footings Float Finish Horizontal construction joints Left Rough Slabs & Miscellaneous Paving Incidental Works Sidewalks, curb, combination curb Broom or Belt Finish

and gutter, concrete paving, safety curb, median paving Exterior platforms, steps, landings, Nonslip Finish and pedestrian ramps 3.2.7.2 Rough Form Finish a Immediately following the removal of forms, all fins and irregular projections shall be removed from all surfaces except from those that are not to be exposed or not to be waterproofed. On all surfaces, the cavities produced by

JUNE 2026 03300-17 CAST-IN-PLACE CONCRETE

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project form ties and all other holes, honeycomb spots, broken corners or edges, and other defects shall be thoroughly cleaned and, after having been kept saturated with water for a period of not less than 3 hours, shall be carefully pointed and trued with a mortar of cement and fine aggregate mixed in proportions used in the grade of the concrete being finished. Any excess mortar at the surface

of the concrete due to filling form tie holes shall be struck off flush with a cloth. The mortar patches shall be cured as specified under Curing. All construction and expansion joints in the completed work shall be left carefully tooled and free of all mortar and concrete. The joint filler shall be left exposed for its length with clean and true edges.

b The resulting surfaces shall be true and uniform.

3.2.7.3 Grout Finish a All fins, projections, etc. shall be removed to the satisfaction of, and by means approved by the Owner/Owner’s Representative (stone, chipping hammer, sandblasting, etc.). No cleaning operations shall be undertaken until all contiguous surfaces to be cleaned are completed and accepted. Cleaning as the work progresses will not be permitted. The surface of the concrete shall then be saturated with water and kept wet

for at least 2 hours. Proceeding by sections, a grout mix of 1 part Portland cement and 1 1/2 parts fine sand with sufficient water to produce a grout having the consistency of the thick paint shall be thoroughly rubbed onto the surface using burlap pads or cork floats completely filling all voids, pits, and irregularities. While the grout is still plastic, remove all unnecessary grout by working the

surface with a rubber float or burlap. After this grout has dried sufficiently so that it will not smear, the surface shall be wiped off with dry, clean burlap so as to leave a clean uniform surface. This surface shall then be cured as required, except that only colorless liquid curing compound will be permitted for this method.

3.2.7.4 Float Finish a After the concrete has been placed, consolidated, struck off, and leveled, the concrete shall not be worked further until ready for floating. Floating with a hand float or with a bladed power trowel equipped with float shoes, or with a powered disc float shall begin when the water sheen has disappeared and when the surface has stiffened sufficiently to permit the operation. During or after the first

floating, planeness of surface shall be checked with a 10 ft straightedge applied at not less than two different angles. All high spots shall be cut down and all low spots

JUNE 2026 03300-18 CAST-IN-PLACE CONCRETE

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project filled during this procedure to produce a smooth surface.

The slab shall then be refloated immediately to a uniform sandy texture.

3.2.7.5 Troweled Finish a First, the surface shall be float-finished. It shall next be power troweled and finally hand troweled. The first troweling after power floating shall produce a smooth surface which is relatively free of defects, but which may still show some trowel marks. Additional troweling shall be done by hand after the surface has hardened sufficiently. The final troweling shall be done when a

ringing sound is produced as the trowel is moved over the surface. The surface shall be thoroughly consolidated by the hand troweling operations. The finished surface shall be essentially free of trowel marks, uniform in texture, and appearance and to a smooth plane.

3.2.7.6 Broom or Belt Finish a Immediately after the concrete has received a float finish, it shall be given a coarse transverse scored texture by drawing a broom or burlap belt across the surface.

3.2.7.7 “Dry Shake” Finish a If a "dry shake" application of a selected metallic or mineral aggregate is specified, the aggregate, selected or acceptable to the Owner/Owner’s Representative, shall be blended with Portland cement in the proportions recommended by the manufacturer of the aggregate. The surface shall be given a float finish. Approximately twothirds of the blended material for required coverage shall

be applied to the surface by a method that ensures even coverage without segregation. Floating shall begin immediately after application of the first “dry shake.” After this material has been embedded by floating, the remainder of the blended material shall be applied to the surface at the right angles to the previous application. The second application shall be heavier in any areas not sufficiently covered by the first application. A second

floating shall follow immediately. After the selected material has been embedded by the two floatings, the operation shall be completed with a broomed, floated, or troweled finish, as designated in the Contract Documents.

3.2.7.8 Nonslip Finish a Where the Contract Documents require a nonslip finish, the surface shall be given a "dry shake" application, as specified in the previous paragraph. “Dry Shake” Finish, of crushed ceramically bonded aluminum oxide or other

JUNE 2026 03300-19 CAST-IN-PLACE CONCRETE

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project specified selected abrasive particles. The rate of application of such material shall be not less than 25 pounds per 100 square feet.

3.2.7.9 Buried concrete structures shall be finished and dampproofed per section 09900.

3.2.8 Removal of defective concrete 3.2.8.1 Concrete not meeting the requirements specified herein shall be removed, disposed of and replaced by the Contractor at no cost to the County.

JUNE 2026 03300-20 CAST-IN-PLACE CONCRETE

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project Table 03300-2

(1) (2) (3) (4) (5) (6) (7) (8) (9)

Mix Mo./ 28 Day specified General Use Min. Cement Max. Water Concrete Aggregate Entrained Slump MD. SHA Design Content Cement Temp. (F) Size Air inches No. Comprehensive lbs./yd3 Ration by Wt. AASHTO (Percent) Strength M43 Size 1 2500 Massive 470 0.55 70 ± 20 #57 or #67 6 ½ ± 1 ½ 2 to 5 Unreinforced Sections, Slope Protection 2 3000 Incidental 560 0.50 70 ± 20 #57 or #67 6 ½ ± 1 ½ 2 to 5 Structures

3 3500b Structures and 610 0.50 70 ± 20 #57 or #67 6 ½ ± 1 ½ 2 to 5 substances 4 3500 Concrete 650 0.55 70 ± 20 #57 or #67 None 4 to 8 Deposited Under Water 5 3500 Thin 610 0.50 70 ± 20 #7 6 ½ ± 1 ½ 2 to 5 Reinforced Sections 6 4500b High Strength 650 0.45 65 ± 15 #57 or #67 6 ½ ± 1 ½ 2 to 5 The 5,000 PSI concrete mix called out on the Contract Drawings shall meet the mix design requirements shown on the plans.

General Note for Table 03300-2 - When concrete is exposed to water exceeding 15000 ppm salt content, or sewer gas, Type II cement shall be used. Type I or Type II cement shall be used for all other concrete.

b - Type D- Retarding admixture or Type A - Water Reducing Admixture shall be added to bridge, box culvert and retaining wall concrete.

END OF SECTION

JUNE 2026 03300-21 CAST-IN-PLACE CONCRETE

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 03600

GROUT

1.0 GENERAL

1.1 WORK INCLUDED

1.1.1 The Contractor shall furnish all materials, labor, and equipment necessary to place non-shrink grout where shown on the drawings or directed by the Engineer.

1.2 RELATED WORK

1.2.1 Cast-in-place concrete shall be in accordance with Specification 03300.

1.3 SUBMITTALS

1.3.1 All pre-manufactured or premixed grout that is to be used by the Contractor shall be submitted to the Engineer for review. The grout used shall be manufactured for the anticipated use and submitted data from the manufacturer shall state the intended uses.

1.4 QUALITY ASSURANCE

1.4.1 Pre-manufactured grout work shall be conducted in accordance with the grouting manufacturer's instructions. Pre-manufactured grout used shall provide a two year warranty.

1.4.2 All grouting work shall be conducted in accordance with ASTM C404 and C476.

2.0 PRODUCTS

2.1 PRE-MANUFACTURED GROUT

2.1.1 Pre-manufactured grout shall be in accordance with the U.S. Army Corps of Engineers, CRD-C-621, Handbook of Concrete and Cement, Specification for Non-shrink Grout, Volume II.

2.2 READY-MIXED GROUT

2.2.1 Materials shall be in accordance with ASTM C404 and C476.

2.3 NON-SHRINK GROUT

2.3.1 Non-shrink grout to be installed where indicated on the drawings, shall be Sika Grout 212, as manufactured by Sika Corporation, or equal.

3.0 EXECUTION

3.1 GENERAL

3.1.1 Where indicated on the drawings, a grout fill shall be placed. Grout shall be cured as specified herein:

3.1.1.1 Before actual placement begins, the Contractor shall have all equipment needed for adequate curing on hand and ready to

JUNE 2026 03600-1 GROUT

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project install. Until such equipment is ready to the satisfaction of the Engineer, no grout shall be placed.

3.1.1.2 Warm Weather a All grout shall be adequately protected from injurious action by the sun. Fresh grout shall be protected from heavy rains, flowing water and mechanical injury. All grout shall be kept wet for a period of not less than 7 days by covering with water or an approved water-saturated covering, or by a system of perforated pipes or mechanical sprinklers, or any other approved method

which will keep all surfaces continuously (not periodically) wet. Where wood forms are left in the place for curing, they shall be kept wet at all times to prevent opening at the joints and drying out. Water for curing shall be generally clean and entirely free from any elements which, in the opinion of the Engineer, might cause straining or discoloration.

3.1.1.3 Cold Weather a Grout when placed during cold weather, shall be kept moist and provided with adequate protection for a period of not less than 14 days, in accordance with para. 3.10.2 above, and subject to the approval of the Engineer, so that the air in contact with the grout will be maintained at temperatures between 50 degrees and 70 degrees F. for at least the first 5 days of the curing period.

3.1.1.4 Curing by means of a commercial membrane curing compound will be permitted, provided the compound used will not permanently stain exposed surfaces and conforms to ASTM C309, Type 1-D, Class B, with a fugitive dye, and is applied in strict accordance with the manufacturer's recommendations.

Where grout is to be placed over concrete, a curing compound will not be permitted. Sisalkraft paper or 3 mil polyethylene sheets or equal covering may be used for curing of the concrete in these areas.

3.1.2 Grout indicated to be placed beneath installed equipment shall be placed carefully in consideration of the directions of the manufacturer of the equipment.

END OF SECTION

JUNE 2026 03600-2 GROUT

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 05500

MISCELLANEOUS METALS

1.0 GENERAL

1.1 DESCRIPTION OF WORK

1.1.1 This section covers the furnishing and installing of items and assemblies fabricated of steel and aluminum as shown and specified. Items included, but not limited to, are as follows:

1.1.1.1 Grating 1.1.1.2 Misc. Supports, Anchors and Fasteners 1.1.1.3 Aluminum pipe railing/guardrail with Kickplate 1.1.1.4 Stainless Steel Guide Railings for Submersible Mixers 1.1.1.5 Structural Steel for Canopy over Methanol Feed System

1.2 SUBMITTALS

1.2.1 Prepare and submit for Engineer approval detailed Shop Drawings and samples of work included herein for approval, and do not proceed with any work for which such Shop Drawings or samples are required until they have been approved. Shop Drawings shall indicate kinds of materials, sizes of gauges and shapes of members, and details of pieces worked out, due reference to their position and execution of work in connection with other

trades.

1.2.2 Approval of Shop Drawings shall not relieve Contractor from responsibility for correctness of details and dimensions, or proper fabrication and installation of work, nor from obligation to provide all materials and labor required by the Contract even though they are incorrectly shown or not indicated on approved Shop Drawings.

1.2.3 Submittals shall meet the requirements of Section 01300.

1.3 QUALITY ASSURANCE

1.3.1 All welders shall be certified, qualified welders in accordance with the requirements of the American Welding Society, for the particular materials and methods being used. The welder's certification papers shall be available on the first trip by the inspector.

1.3.2 All welding materials and methods used for fabrication and erection shall be in accordance with the requirements of the American Welding Society.

2.0 PRODUCTS

2.1 MATERIALS

2.1.1 Shapes and Bars 2.1.1.1 Mild steel shall conform to requirements of ASTM A36.

JUNE 2026 05500-1 MISCELLANEOUS METALS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.1.1.2 Stainless steel shall conform to requirements of ASTM A276, Type 304.

2.1.1.3 Aluminum shall conform to requirements of ASTM B221, Alloy 6061-T6.

2.1.2 Plate, Sheets and Strips 2.1.2.1 Mild steel shall conform to requirements of ASTM A36, or A283, Grade C.

2.1.2.2 High strength steel shall conform to requirements of ASTM A242.

2.1.2.3 Corrosion resistant steel shall conform to requirements of ASTM A242; 0.25 to 0.75 percent copper.

2.1.2.4 Stainless steel shall conform to requirements of ASTM A240, Type 304.

2.1.2.5 Aluminum shall conform to requirements of ASTM B209, Alloy 601-T6.

2.1.3 All welding electrodes for steel shall be E-70XX and shall conform to AWS A-5.1 and AWS A-5.5. All welding machines, etc., shall be compatible with the type of steel being welded.

2.1.4 Aluminum shapes shall be alloy 6061-T6.

2.1.5 All aluminum shall be welded using aluminum filler alloy ER4043.

2.1.6 Anchors, couplings, bolts and nuts repaired to support miscellaneous metals work shall be furnished and installed as required. Materials shall be as follows: bolts, nuts, and anchors used in buried or submerged locations, and anchors connecting stainless steel or aluminum to any other surface shall be of Type 304 stainless steel.

2.2 GRATING

2.2.1 Aluminum 2.2.1.1 Aluminum floor grating, where shown on Contract Drawings, shall be SGI Series Aluminum I-Bar, type 19-SGI-4 by Ohio Gratings, or equal.

2.2.1.2 Grating shall have square cross bars assembled through diamond shaped holes in I-shaped bearing bars, permanently locked in place by a swaging process.

2.2.1.3 Bearing bar shall have a thickness of 1/4 inch at the top to provide 15/16 inch space between the bars Bearing bars to be placed edgewise and joined by straight cross bars.

2.2.1.4 Size and spacing of bars as follows:

a Bearing bars 1 1/2 inches deep on 1 3/16 inch centers.

JUNE 2026 05500-2 MISCELLANEOUS METALS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project b Cross bars on 4 inch centers.

2.2.1.5 Fabricate cutouts in grating sections for penetrations as indicated. Arrange cutouts to permit grating removal without disturbing items penetrating gratings. Trim band ends (and cuts in grating) with 1/8” minimum thickness banding bars of the same nominal depth and material as bearing bars.

2.2.1.6 Material shall be as follows:

a Bearing bars – Aluminum Alloy 6063-T6 b Cross bars – Aluminum Alloy 6063-T1 2.2.1.7 Fasteners shall be aluminum Saddle clip or R-clip, as needed by Ohio Grating, or equal.

2.2.1.8 Finish shall be Standard Mill as fabricated.

2.2.2 Stainless Steel 2.2.2.1 Stainless steel floor grating, where shown on Contract Drawings, shall be SGSS Series Swaged Stainless Steel, type 19-SGSS-4 by Ohio Gratings, or equal.

2.2.2.2 Grating shall have square tubular stainless steel cross bars assembled through round holes in rectangular bearing bars, then permanently locked in place by swaging.

2.2.2.3 Bearing bar shall have a thickness of 3/16 inch at the top to provide 1 inch space between the bars. Bearing bars to be placed edgewise and joined by straight cross bars.

2.2.2.4 Top surface of bearing bars shall be serrated.

2.2.2.5 Size and spacing of bars as follows:

a Bearing bars 1 inches deep on 1- 3/16 inch centers.

b Cross bars on 4-inch centers.

2.2.2.6 Fabricate cutouts in grating sections for penetrations as indicated. Arrange cutouts to permit grating removal without disturbing items penetrating gratings. Trim band ends (and cuts in grating) with bars of the same size and material as bearing bars.

2.2.2.7 Material shall be as follows:

a Bearing bars – Stainless Steel Type 316 b Cross bars – Stainless Steel Type 316 2.2.2.8 Fasteners shall be aluminum Saddle clip or R-clip, as needed by Ohio Grating, or equal.

JUNE 2026 05500-3 MISCELLANEOUS METALS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.2.2.9 Gratings shall be blast finished to SP6 after fabrication and passivated finish per ASTM A-967.

2.3 ALUMINUM PIPE RAILING (GUARD RAIL)

2.3.1 All aluminum handrails shall be as shown on the drawings and shall conform to the design and installation specifications that meet all standards as set by OSHA for hand railing (aka guard rail). All handrails shall be fabricated using extruded aluminum pipe, 1-1/2" schedule 40 pipe size having a circumferentially brushed satin 0.7 mil. anodized finish, and aluminum fittings machined from solid extruded aluminum shapes of the same alloy and

finished as the pipe. All bind rivets and self-tapping screws shall be 305 stainless steel. Wherever posts are mounted other than in concrete or side mounted, cast or machined aluminum base flanges shall be used. All railings, wherever possible, shall be fabricated using a continuously formed top rail to minimize the number of splice joints. Railing shall in all respects conform to the design details as shown on the drawings and shall be installed

in accordance with the installation details of the manufacturer.

2.3.2 All pipe cuts shall be square and accurate for minimum joint-gap. Cuts shall be clean and straight, free of "chamfer" from deburring, burrs and nicks. All holes shall be drilled and countersunk the proper size, as required for a tight, flush fit of rivets. Where protection is applied for prevention of dissimilar materials electrolysis, care shall be taken that none of the protective material

is visible when assembly is completed. All posts grouted in concrete must have one weep hole 15/64" diameter drill, 1/2" to 3/4" above post collar in the plane of the rail.

2.3.3 Post spacing should not exceed 6'-0" on center. All attachment brackets shall be spaced as specified. Posts shall be a single unspliced pipe length. Lower rails shall be a single, unspliced length between posts. Top rails shall be continuous whenever possible, and a single, unspliced length shall, where possible, be attached to a minimum of three posts. All fasteners shall be tightened so that completed railing is rigid and completely free of play at all

joints and attachments. After drilling 15/64" diameter hole, the #17 screws are to be self-tapped into the hole and seated firmly with a torque of approximately 100 in lbs.

2.3.4 The contractor shall use all precautions necessary to protect the finish from scratches, nicks, gouges, dents, etc., during storage, assembly, and installation. Insofar as possible, the plastic film shall be left intact on the pipe until inspections and acceptance by the OWNER. Rail should be stored in an area protected from the elements prior to installation.

2.3.5 Surfaces of railing in contact with other metals and concrete surfaces should be painted with a coat of bituminous paint to prevent contact between the two surfaces. All components shall be installed so that no drainage over them has previously been contaminated from copper, caustics, or alkalis.

JUNE 2026 05500-4 MISCELLANEOUS METALS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.3.6 For all exterior installations, provisions must be made to drain water from the railing system to prevent damage caused by freezing of entrapped water.

Likewise, for interior installations subject to high humidity, provision must be made to drain water from the railing system. When posts are mounted into concrete or when bends or elbows occur at low points, weep holes of 15/64" minimum diameter must be drilled at the lowest possible elevations.

2.3.7 Provide railing with 4” aluminum kick plate.

2.3.8 Railing system shall be Wesrail, as manufactured by Moultrie Manufacturing Company, or equal.

2.4 STAINLESS STEEL GUIDE RAILS

2.4.1 All submersible mixers as per specification Section 11321 shall be provided with stainless steel guide rails as shown on the contract drawings and as required by the manufacturer. A submittal covering materials and product shall be submitted for the guide rails.

2.5 FABRICATION

2.5.1 All pieces shall be provided with erection connections. Erection connections shall be as shown on the Drawings, or as approved by the OWNER.

2.5.2 All bearing ends of columns shall be square and level.

2.5.3 No holes shall be cut without prior approval of the OWNER.

2.3.1 All welds exposed to view shall be subject to the following requirements:

2.5.3.1 Welds where two pieces fit up flush or where two pieces meet at an outside corner shall be ground smooth and square.

2.5.3.2 Welds two pieces meet at an inside corner shall be neat and uniform.

2.5.3.3 Where the structural integrity of the connection is not affected, body solder may be used to fill and smooth out connections. Type of material used, and method of application will be subject to approval and shall be done only after the weld has been inspected and approved.

2.5.3.4 Continuous welds are to be made where required and as shown on Contract Drawings to provide a weather-tight structure.

3.0 EXECUTION

3.1 PREPARATION

3.1.1 All aluminum, where in contact with steel, concrete or masonry construction shall receive a coating of heavy bodied bituminous paint, 8 – 10 mils DFT or be provided with a neoprene pad.

3.1.2 Where aluminum is fastened to steel, stainless steel bolts with neoprene washers shall be used.

JUNE 2026 05500-5 MISCELLANEOUS METALS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.1.3 Verify all measurements in the field.

3.1.4 Deliver to Contractor all anchor bolts and plates required for the installation of miscellaneous metal projects to be set in concrete or in masonry in ample time for installation with templates and/or instructions for setting.

END OF SECTION

JUNE 2026 05500-6 MISCELLANEOUS METALS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 07410

ROOFING PANELS

1.0 GENERAL

1.1 WORK INCLUDED

1.1.1 Furnish, deliver, and install metal roof panels, associated eave trim and flashing work.

1.2 SUBMITTALS

1.2.1 Submittals shall be in conformance with section 01300.

1.2.2 Panel data and standard details shall be provided for eave and gable terminations.

1.3 PRODUCT HANDLING, DELIVERY AND STORAGE

1.3.1 Deliver and store panels and other manufactured items so they will not be damaged or deformed.

1.3.2 Stack materials on platforms or pallets above grade or on concrete slab, covered with opaque tarpaulins or other approved weather-resistant ventilated covering.

1.3.3 Store metal sheets and panels if subjected to water accumulation in such a manner so they will drain freely. Do not store sheets and panels in contact with other materials which might cause staining.

1.3.4 Inspect panels for quality. Damaged material must be reported to determine if replacement is required.

1.3.5 Prevent moisture between panels, and secure as required.

1.4 WARRANTIES

1.4.1 Manufacturers standard one (1) year material and workmanship warranty from the date of Substantial Completion.

1.4.2 Color fading in excess of five Hunter Units per ASTM D 2244 for 25 years.

2.0 PRODUCTS

2.1 ROOFING PANELS

2.1.1 Roof Panels 2.1.1.1 Standing seam roof panels shall be roll-formed Aluminum-Zinc Coated steel panels joined together by an interlocking seam and secured to the structure with an interlocking clip.

2.1.1.2 The panels shall be produced from steel having a min. yield strength of 50 ksi. The panels shall be a minimum of 24”. Each side of the panel shall have a 2” high box rib plus a 0.88” high seam, forming a 2.88 overall panel height.

JUNE 2026 07410-1 ROOFING PANELS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.1.1.3 When adjacent panels are interlocked at the seam, the sides of the adjoining panel form an elevated trapezoidal section 2.88” high by 4.25” wide measured at the panel flat. The panel flat is embossed with 0.09” deep cross ribs at 6” o.c. The adjacent panels shall be interlocked with a roof seaming apparatus. The finished seam shall include clips.

2.1.1.4 Product/Manufacturer. Equal to Double-Lok roof panels Produced by STAR BUILDING SYSTEMS, Oklahoma City, Oklahoma.

2.1.1.5 Roof panel clips shall consist of a 12-gauge (0.11”) steel base with an interlocking 22-gauge (0.03”) steel tab. The base shall be produced from a galvanized or Aluminum-Zinc Coated steel having a min. yield strength of 50 ksi. The base shall be 5” long by 5” high, or 5” wide by 2” high for a non-stand-off roof, or 6” by 3” high for roof planes wider than 120’-0”, or 5” long by 3.75” high for additional stand-off for insulation over 4” thick. The tab is 4”

long and is formed at the top to fit between adjacent panel side laps. The base of the clip shall be secured to roof deck with two 0.25” – 0.25” x 1.5” self-drilling fasteners with a hex head per clip.

The ¼” - 14 x 1.5” self-drilling fastener is a 0.25” - 14 thread, Teks/2 point Type 1022 with a flared hex head. The screw surface shall be coated with a long life finish.

2.1.2 Panel Finish 2.1.2.1 Manufacturers Standard Fluoropolymer Two-Coat System (PVDF): 0.2-0.3 mil primer with 0.7-0.8 mil 70 percent PVDF fluoropolymer color coat (Star Building Coating Signature 300, or equal). Color to be selected by the Owner.

2.1.3 Fasteners 2.1.3.1 Exposed Fasteners for Eave, End Splice, Ridge Cover and Flashing: Manufacturer's standard #12-14 x 1.25" self-drilling screw with sealing washer. Cap head and washer with 0.01" thick type 302 stainless steel caps.

2.1.3.2 Trim Fasteners: Manufacturer's standard plated and finish painted #8 x 0.625" self-drilling screws with 0.25" hex washer head.

2.1.4 Sealants 2.1.4.1 Standing Seam Sealant: Approved type non-shrinking, nondrying butyl-based sealant specifically formulated for factory application in standing seams and to allow roof panel assembly at temperatures from minus 10 degrees Fahrenheit to 140 degrees Fahrenheit and shall be in accordance with United States Federal Spec TT-C-1796A (Type II, Class B).

JUNE 2026 07410-2 ROOFING PANELS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

3.0 EXECUTION

3.1 GENERAL

3.1.1 Installation shall be accomplished by a trained, competent installer who has experience in standing seam roof installations.

3.1.2 Install all components in strict compliance with manufacturer’s instructions shown on final shop drawings.

3.1.3 Handle and store all materials to avoid damage and replace any damaged materials.

3.2 ROOFING PANELS

3.2.1 General 3.2.1.1 Install roof and canopy panels in such a manner to permit drainage to eaves of building, with panel ends square to the eave.

3.2.1.2 Arrange and nest side lap joints away from prevailing winds when possible.

3.2.1.3 Apply panels and associated items for neat and weather tight enclosure.

3.2.1.4 Avoid "panel creep" or application not true to grid lines.

3.2.1.5 Protect factory finishes from mechanical damage or abrasions.

3.2.1.6 Install approved type closures to exclude weather. Install weather seal under ridge cap. Flash and seal roof panels at eave, gable and perimeter of all openings through roof and elsewhere as required or shown on manufacturer's stand installation drawings.

3.2.1.7 Flash and/or seal wall and liner panels at perimeter of all openings, under eaves and gable trims, along lower panel edges, and elsewhere as required or shown on manufacturer's drawings, as applicable.

3.2.1.8 Remove all fasteners or cut shavings from roof and wall as erection is completed.

3.2.2 Standing Seam Roof Panels 3.2.2.1 Install panels with positive interlock between installation clips and standing seams in such a manner that allow panels to support erection loads prior to closing of seams with seamer.

3.2.2.2 Install concealed panel clips (of sliding design to allow for expansion and contraction movement of panels) over top of roofing insulation along each standing seam at location and spacing determined by metal building manufacturer and shown on the manufacturer's drawings.

3.2.2.3 Where panel end splices occur, nest panels with end laps according to manufacturer's instructions and install interlocking clamping plates and sealant. Make splice independent of

JUNE 2026 07410-3 ROOFING PANELS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project structure to allow for free expansion and contraction movement of panels without stress on splice.

3.2.2.4 Crimp standing seams with approved type motorized seamer tool to assure complete sealant engagement and to assure structural integrity of panel-to-panel and panel-to-clip connections.

3.2.2.5 Use fasteners penetrating roof panel only at eaves and end splices (when required). At these conditions, use fasteners in conjunction with clamping plates (with factory-punched holes to assure correct fastener placement) and approved type butyl sealant to assure positive watertight seals.

3.2.2.6 Install ridge cover units of approved expansion joint design to accommodate expansion and contraction movement of roof panels without ponding at end splices.

3.2.2.7 Coordinate installation of accessories and items to be mounted on metal roofing.

3.2.2.8 Maintain proper panel coverage according to manufacturer’s instruction and drawings.

3.3 PAINTING

3.3.1 Touch-up all abrasions, scratches, field welds or other damages in shop-coat or factory-finished painted surfaces consistent with shop coat or factoryfinished painting.

3.3.2 Provide finish coats which are compatible with metal building manufacturer’s shop coat paints if required. If finish coat is not compatible with shop coat provide approved barrier coats over incompatible shop coats. All finish coats by other should be solvent base or approved by manufacturer.

END OF SECTION

JUNE 2026 07410-4 ROOFING PANELS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 09900

PAINTING

1.0 GENERAL

1.1 DESCRIPTION OF WORK

1.1.1 Work Included 1.1.1.1 The type of material to be used and the number of coats to be applied are listed in the "Schedule of Painting" in PART 3.0 of this Section of these specifications.

1.1.1.2 In general, the work includes shop and field painting of all surfaces as shown on the painting schedule. The Contractor shall paint or coat all miscellaneous metal, piping, cast-in-place concrete, steel and any other work normally requiring paint for protection against weather or corrosion.

1.1.1.3 Where equipment has not received shop painting the Contractor shall provide the required surface preparation and primer prior to application of the finish coats.

1.1.1.4 All surfaces which shall be concealed after installation shall be primed and top coated with the specified painting system for the material.

1.1.2 Definitions 1.1.2.1 The term "paint," as used herein, includes enamel paints, sealers, fillers, emulsions, and other coatings whether used as prime, intermediate or finish coats.

1.2 QUALITY ASSURANCE

1.2.1 Qualifications of Painters 1.2.1.1 Only qualified journeyman painters shall be used for the mixing and application of paint on exposed surfaces in the acceptance or rejection of installed painting, no allowances will be made for lack of skill on the part of painters.

1.2.1.2 Well in advance of commencement of painting the Contractor shall submit the name and experience of the painting Subcontractor. Approval of the painting Subcontractor by the Owner's Representative shall be based upon a determination that this subcontractor is experienced enough to do the type of work required under the contract.

1.2.2 Codes & Standards 1.2.2.1 In addition to complying with all pertinent codes and regulations, comply with "Standard (Type 1)" as defined by the Painting and

JUNE 2026 09900-1 PAINTING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project Decorating Contractors of America in their "Modern Guide to Paint Specification, " latest edition.

1.2.2.2 All coatings in contact with potable water, or water to become potable, shall be NSF 61 compliant.

1.3 SUBMITTALS

1.3.1 Submittals shall meet the requirements of Section 01300.

1.3.2 Materials List 1.3.2.1 Before any paint materials are delivered to the job site, submit to the Owner's Representative a complete list of all materials proposed to be furnished and installed under this portion of the work.

1.3.2.2 This shall in no way be construed as permitting substitution of materials for those specified by the Engineer or approved for this Work by the Owner's Representative.

1.3.2.3 Safety Color Codes as specified in the Occupational Safety and Health Act of 1970 shall be required as part of this contract.

1.3.3 Samples 1.3.3.1 Accompanying the materials list, submit to the Owner's Representative five copies of the full range of colors available in each of the proposed products.

1.3.3.2 Paint colors shall be as hereinafter specified or as selected by the Owner. The Contractor shall provide the Owner with color chips in the selection of colors.

1.3.3.3 Before any finish painting is done, the Contractor shall obtain from the Owner the final selected color chips and a schedule showing where the various colors shall be used. The Contractor shall then prepare samples at the job as required until the colors and textures are satisfactory.

1.3.3.4 If standard color charts are not acceptable to the Owner in accordance with the requirements of the color scheme specified, the Contractor shall provide tinting and matching to the satisfaction of the Owner.

1.3.4 Maintenance Requirements For Painted Surfaces 1.3.4.1 Upon satisfactory completion of all painting, the Contractor shall provide a manual which shall include all information necessary to properly maintain all painted surfaces in quality condition. The information required will include:

a Paint Manufacturer - Name and address and local distributor.

JUNE 2026 09900-2 PAINTING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project b Product Description - Name, Type, or Number

1.4 PRODUCT HANDLING

1.4.1 Delivery 1.4.1.1 Deliver all paint materials to the job site in their original unopened containers with all labels intact and legible at time of use.

1.4.2 Protection 1.4.2.1 Store only the approved materials at the job site, and store only in a suitable and designated area restricted to the storage of paint materials and related equipment.

1.4.2.2 Use all means necessary to ensure the safe storage and use of paint materials and the prompt and safe disposal of waste.

1.4.2.3 Use all means necessary to protect paint materials before, during and after application and to protect the installed work and materials of all other trades.

1.4.3 Replacements 1.4.3.1 In the event of damage, immediately make all repairs and replacements necessary to the approval of the Owner's Representative and at no additional cost to the Owner.

2.0 PRODUCTS

2.1 PAINT MATERIALS

2.1.1 Manufacturer 2.1.1.1 All paint materials selected for coating for each type of surface shall be the product of a single manufacturer.

2.1.1.2 Paint materials shall be acceptable products of Tnemec Co., or equal. All references in Part 3.10 "Schedule of Painting" are for products manufactured by Tnemec Co, unless specified otherwise.

2.1.1.3 Products of named companies require no further approval as to manufacture or catalog number. Products of other manufacturers may be used subject to approval by the Owner's Representative of the materials list and manufacturer's product data sheet and recommendations required to be submitted under Part 1.3 herein.

2.1.2 Compatibility 2.1.2.1 All paint materials and equipment shall be compatible in use;

finish coats shall be compatible with prime coats, prime coats shall be compatible with the surface to be coated, and all tools and equipment shall be compatible with the coating to be applied.

JUNE 2026 09900-3 PAINTING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.1.2.2 Thinners, when used, shall only be those thinners recommended for that purpose by the manufacturer of the material to be thinned.

3.0 EXECUTION

3.1 SURFACE CONDITIONS

3.1.1 Inspection 3.1.1.1 Prior to all work of this Section, the Contractor shall carefully inspect the installed work of all other trades and verify that all such work is complete to the point where this installation may properly commence.

3.1.1.2 The Contractor shall verify that paint finishes may be applied in strict accordance with all pertinent codes and regulations and the requirements of these Specifications.

3.1.2 Discrepancies 3.1.2.1 In the event of discrepancy, immediately notify the Owner's Representative.

3.1.2.2 Do not proceed with installation in areas of discrepancy until all such discrepancies have been fully resolved.

3.2 PREPARATION OF SURFACES, GENERAL

3.2.1 Protection 3.2.1.1 Prior to all surface preparation and painting operations, completely mask, remove, or otherwise adequately protect all hardware, nameplates, accessories, machined surfaces, plates, lighting fixtures, and similar items in contact with painted surfaces not scheduled to received paint.

3.2.2 Priming 3.2.2.1 Spot prime all exposed nails and other metals which are to be painted with emulsion paints using a primer recommended by the Manufacturer of the coating system.

3.2.3 Cleaning 3.2.3.1 Before applying paint or other surface treatment, thoroughly clean all surfaces involved.

3.2.3.2 Schedule all cleaning and painting so that dust and other contaminants from the cleaning process will not fall on wet or newly painted surfaces.

3.3 PREPARATION OF SURFACES, SPECIFIC

3.3.1 Ferrous metal surfaces subject to continuous or intermittent immersion, except for inside of pipes, shall be sandblasted to a Near-White Grade in

JUNE 2026 09900-4 PAINTING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project accordance with Specification SSPC-SP-10. All blasted surfaces must be coated the same day as blasted.

3.3.2 All other ferrous metal surfaces subject to normal industrial exposure shall be sandblasted to a Commercial Grade in accordance with Specification SSPC-SP-6. All blasted surfaces must be coated the same day as blasted, within 4 hours of the surface preparation. – Note that this surface preparation will be applicable to the structural steel provided at the Methanol Feed System.

3.3.3 Where approved, pickling of ferrous metal surfaces may be substituted for sandblasting. Pickling shall be in accordance to Specification SSPC-SP-8.

3.3.4 Where, in the opinion of the Owner's Representative, it is not practical or possible to sandblast or pickle, ferrous metals may be prepared for painting by Power Tool Cleaning in accordance to Specification SSPC-SP-3 or by Hand Tool Cleaning in accordance to Specification SSPC-SP-2.

3.3.5 Removal of grease, oils, tars and other contaminants shall be in accordance to Specification SSPC-SP-1, Solvent Cleaning.

3.3.6 Concrete 3.3.6.1 All concrete surfaces shall be cleaned of all dust, dirt, form oil, curing compounds and other foreign matter by Brush-off Blast Cleaning, in accordance with SSPC-SP-7.

3.3.6.2 Exterior concrete shall have all honeycomb patched prior to application of damp-proofing.

3.3.6.3 Below grade concrete that is to be waterproofed shall receive a parge coat. The parge coat shall include two coats of Portland cement mortar, each 3/8 inch thick. The first coat shall be cross scratched; the second coat shall be troweled smooth, beveled at the top and covered out at the edge of the footing. Extend parging not more than four inches above grade, unless indicated otherwise, and keep damp for at least three days.

3.3.7 All masonry surfaces shall be dry, clean, and free of contaminants. All above grade mortar shall have been aired for at least 28 days. Level protrusions and mortar spatter.

3.3.8 All interior metal pipe which has received a shop-applied epoxy coating shall be mechanically profiled prior to coating.

3.4 PAINT APPLICATION

3.4.1 Coating shall be applied in accordance with Paint Manufacturer's recommendations and may be subject to inspection at all times by representatives of the Owner or Manufacturer.

3.4.2 All spray equipment shall be inspected and approved by the Owner’s Representative before paint application is begun.

JUNE 2026 09900-5 PAINTING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.4.3 A moisture trap shall be placed in line from air supply to pressure pot and spray gun. This trap shall be opened slightly to provide a continuous bleed.

3.4.4 Regulators and gauges shall be provided for air to both pressure pot and spray gun.

3.4.5 All sand and dust from blasting operations shall be removed from surfaces before painting application is begun.

3.4.6 Blasted surfaces shall be coated with one coat of primer during the same day that blasting was done.

3.4.7 Primer shall not be applied closer than 6 inches to a non-blasted area. Any subsequent blasting operation shall not result in sand particles embedded in the paint films.

3.4.8 No painting shall take place when the temperature is below 50 degrees, F., when the surface temperature is less than five degrees above the dew point, or when relative humidity is above 85 percent, unless approved by the representative of the Owner or Paint Manufacturer.

3.4.9 Spray guns must be held perpendicular to the surfaces being painted and handled and adjusted in such a manner that dry overspray is held to a minimum.

3.4.10 The sequence to be followed in painting shall be such that a minimum of damage to finished coatings will result.

3.4.11 When paint is being applied to the interior of tanks or confined areas, sufficient blowers and fans shall be installed to provide adequate ventilation.

3.4.12 Paint Manufacturer and Owner's Representative will be consulted concerning points not covered in these specifications.

3.4.13 Where more than one coat of paint is required, the undercoats shall be a shade lighter than succeeding coats to insure complete coverage.

3.4.14 All sharp edges, crevices, nuts, bolts, and other difficult items to coat shall receive a brush-applied coat of the specified coating prior to the application of each coat.

3.5 INSPECTION

3.5.1 General 3.5.1.1 Do not apply additional coats until completed coat has been inspected and approved by the Owner's Representative.

3.5.2 Number of Coats 3.5.2.1 Only inspected and approved coats of paint will be considered in determining the number of coats applied.

3.6 DRY MIL THICKNESS

3.6.1 General

JUNE 2026 09900-6 PAINTING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.6.1.1 Apply all coatings to the dry mil thickness indicated in the Painting Schedule.

3.6.2 Measurement 3.6.2.1 The contractor shall provide and use a "Tooke Dry Film Thickness Gauge," or other gauge approved by the Owner's Representative, to prove the dry mil thickness of a paint applied.

The contractor shall make measurements in the presence of the Owner or the Owner’s Representative and record all measurements. Measurements shall be provided to the Owner when work is complete.

3.7 REINSTALLATION OF REMOVED ITEMS

3.7.1 Following completion of painting in each space, promptly reinstall all items removed for painting, using only workmen skilled in the particular trade.

3.8 CLEANING UP

3.8.1 General 3.8.1.1 During progress of the Work, do not allow the accumulation of empty containers or other excess items except in areas specifically set aside for that purpose.

3.8.1.2 Prevent accidental spilling of paint materials and, in event of such spill, immediately remove all spilled material and the waste or other equipment used to clean up the spill, and wash the surfaces to their original undamaged condition, all at no additional cost to the Owner.

3.8.2 Prior of Final Inspection 3.8.2.1 Upon completion of this portion of the work, visually inspect all surfaces and remove all paint and traces of paint from surfaces not scheduled to be painted or where there is over spray of one color onto a different color.

3.9 PAINTING OF SPECIFIC SURFACES

3.9.1 In general, equipment previously shop painted with the Manufacturer's standard paint system shall be repainted with colors to suit the area of installation. The Owner's Representative may, at his option, require that certain equipment not be painted.

3.9.2 Imperfections and scratches on equipment not repainted shall be touched up with matching paint provided by the equipment Manufacturer.

3.9.3 Aluminum and stainless steel surfaces shall not be painted, unless it is to isolate them from dissimilar metals.

JUNE 2026 09900-7 PAINTING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.9.4 All pipes and other metals that have been dipped in tar or bituminous products shall receive two (2) coats of anti-bleeding sealer, Tnemec 46-465 H.B. Tnemecolor equal, in place of priming coat.

3.9.5 Galvanized metal shall receive one prime coat of Tnemec series 115 unibond at 2-3 mils DFT, and one topcoat of Tnemec series 1028 at 2-3 mils DFT.

3.10 SCHEDULE OF PAINTING

3.10.1 Exposed Exterior Metal (Including Structural Steel at Methanol Canopy) 3.10.1.1 Primer: Series

90-97 Tneme-Zinc

at 2.5-3.5 mils DFT.

3.10.1.2 Intermediate: Series V69 Hi-Build Epoxoline II at 4.0-6.0 mils DFT.

3.10.1.3 Finish: Series 1095 EnduraShield at 2.0-3.0 mils DFT.

3.10.2 Non-submerged and Submerged Metal 3.10.2.1 Primer: Series V69 Hi-Build Epoxoline II at 4.0-6.0 mils DFT.

3.10.2.2 Finish: Series 141 Epoxoline at 10.0-12.0 mils DFT.

3.10.3 Ferrous Metal Encased in Concrete 3.10.3.1 Primer: 1 coat Alkyd Rust Inhibitive Metal Primer, Tnemec Series V 10 Primer, applied to a dry film thickness of 2.0 mils.

3.10.4 Concrete Below Grade Exposed to Backfill 3.10.4.1 Primer: Parge coats as described in section 3.3.6.3.

3.10.4.2 Finish: 2 coats of W.R. Meadows Sealmastic Semi-Mastic Solvent Type Semi-Mastic, Damproofing or equal. Each wet coat shall 1/16" thick.

3.11 ELECTRICAL WORK

3.11.1 It shall be noted by the Contractor that certain major items of electrical equipment such as panel board, switchgear, control centers, transformers, and similar equipment shall be furnished with factory finish. Field painting will not be required for such items except when finish is damaged by handling, weather or installation. Then the damaged portions shall be field-primed and finished with one finish coat, with primer and finish being of the same type

and color paint as originally used in the factory application. All such repainting shall be performed using the same methods as used by the manufacturer of the equipment. Damaged portions shall be refinished to give a uniform color and texture.

3.12 PIPING COLOR CODE TABLE

3.12.1 Colors shall be used in piping labels as well as to paint pipe. Colors and labels shall be as follows:

JUNE 2026 09900-8 PAINTING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SERVICE COLOR LABEL

Potable Water Dark Blue PW Gravity Sewer Dark Brown WAS Drains Dark Gray D Compressed Air N/A AIR Chemical Feed Line Alum Orange ALUM Methanol Black MeOH

3.13 STENCILING

3.13.1 Equipment and informational identification shall be paint stenciled, stymie bold upper case, on the surface of the equipment. All lettering shall be black paint with specified coatings except that black surfaces shall be white lettering. Two inch lettering shall be utilized to identify all equipment such as "Methanol Pump #1," "Methanol Pump #2" and shall include all equipment as directed by the Owner's Representative. All equipment bearing a name

plate as specified elsewhere shall not be stenciled.

3.14 PIPE LABELS

3.14.1 Piping shall be labeled via markers designed to withstand harsh chemicals and weather all environments. Printed legends of the labels shall be laminated between two layers of polyester. Labels shall coil around the pipe and be secured in place by an overlapping adhesive strip. Labels for piping 8-inches and larger shall be constructed with two layers of polyester that are laminated to a heat and chemical resistant carrier that is applied to the pipe

with stainless steel strapping. A strapping tool shall be provided and implemented for such application.

3.14.2 Labels shall be applied to piping in an orientation appropriate for the direction of flow. Arrows shall be included on pipe labels to facilitate such application.

3.14.3 Labels for piping 1/2-inch to 1 ½-inch shall be Style 4A, labels for piping 1- inch to 2 3/8-inch shall be Style 4B, labels for piping 2 ½-inch to 4 ¾-inch shall be Style 4E, labels for piping 5-inches to 7 7/8-inches shall be Style 4F, labels for piping 8-inches to 10-inches shall be Style 4G, and labels for piping 10-inches and larger shall be model 4H as manufactured by Brimar, or equal.

3.14.4 Labels shall be installed after every change in direction along piping, every 5-10 feet, and where applicable and/or practical.

3.14.5 Contractor to install labels on the same pipes called out in 3.12 of this specification.

END OF SECTION

JUNE 2026 09900-9 PAINTING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 10400

SIGNS

1.0 GENERAL

1.1 SCOPE

1.1.1 Description of Work 1.1.1.1 Furnish all labor and equipment necessary for the complete installation of safety signs and identification signs.

1.1.1.2 Refer to Division 0 for MDE signage requirements.

1.2 SUBMITTALS

1.2.1 The Contractor shall prepare and submit detailed Shop Drawings and samples of work included herein for approval in accordance with the general provisions of Section 01300 of these Specifications and shall not proceed with any work for which such Shop Drawings or samples are required until they have been approved. The Shop Drawings shall indicate the kinds of materials, sizes, gauges, and shapes of members, the detail of pieces

worked out, the due reference to their position, method of anchoring or fastening, and the proper execution of the Work in connection with other trades.

1.2.2 Approval of Shop Drawings shall not relieve the Contractor from the responsibility for the correctness of details and dimensions, for the proper fabrication and installation of the Work, nor from the obligation to provide all materials and labor required by the Contract even though they are incorrectly shown or not indicated on the approved Shop Drawings.

1.3 PRODUCT HANDLING

1.3.1 All metal specialties shall be delivered at the proper times, packed separately with all screws, washers, trimmings, etc., as required for complete installation. All packages shall be labeled for identification as to location and content.

1.3.2 The Contractor shall receive, carefully check, and safely store all specialties, and any loss or damage shall be the Contractor's sole responsibility. He shall, at all times, exercise close control over the handling of metal specialties.

2.0 PRODUCTS

2.1 MATERIALS

2.1.1 “DANGER METHANOL STORAGE AREA, NO SMOKING, NO OPEN

FLAMES”

2.1.1.1 Signs shall be located around the methanol storage and feed system. The sign shall be 10” x 14” and shall contain both a visual depiction of the requirement and words “DANGER FUEL STORAGE AREA, NO SMOKING, NO OPEN FLAMES”. The

JUNE 2026 10400-1 SIGNS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project sign shall have black lettering on white and red orange background.

2.1.1.2 Provide three signs, one on the methanol storage tank, and two on the canopy columns over the methanol feed pumps.

2.1.1.3 Signs shall be aluminum.

2.1.2 “EMERGENCY SHOWER AND EYEWASH”

2.1.2.1 Sign must be installed at the methanol storage tank, near the emergency eyewash and shower station located under the canopy for the methanol chemical feed pumps. The marker shall be white lettering on green field. The sign shall be 10” x 7” fabricated for outdoor use with four attaching holes for mounting.

2.1.2.2 Provide one sign above/near the combination emergency shower and eyewash at the canopy over the methanol feed pumps.

Provide hanging hardware as needed.

2.1.2.3 Signs shall be aluminum.

2.1.3 “FIRE EXTINGUISHER”

2.1.3.1 Sign must be installed at the methanol storage tank, near the fire extinguisher, located under the canopy for the methanol chemical feed pumps. The sign shall be 7" wide by 17" high with red lettering and red border on white background.

2.1.3.2 Provide one sign above the fire extinguisher at the canopy column near the methanol feed pumps.

2.1.3.3 Signs shall be aluminum.

2.1.4 “FIRE BLANKET”

2.1.4.1 Sign must be installed at the methanol storage tank, near the fire blanket, located under the canopy for the methanol chemical feed pumps. The sign shall be 14" wide by 10" high with white lettering and white border on red background.

2.1.4.2 Signs shall be aluminum.

2.1.5 “OPEN TANK”

2.1.5.1 Sign must be installed near the Post Anoxic Reactor (PAR). The sign shall be installed on the handrail at a height of approximately 3’-6” from ground level. The marker shall be black lettering on white field. The sign shall be 10” x 7” fabricated for outdoor use with four attaching holes for mounting.

2.1.5.2 Provide one sign at either end of the tank for a total of two signs.

2.1.5.3 Signs shall be aluminum. Provide mounting hardware/accessories to mount sign to the aluminum handrail.

JUNE 2026 10400-2 SIGNS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

2.2 MANUFACTURER AND PRODUCT REQUIREMENTS

2.2.1 All signs and markers shall be J.J Keller, Brimar Industries, or Equal.

2.2.2 All signs will be provided with 0.20 inch mounting holes in each corner, unless otherwise noted.

2.2.3 All other signs shall be in accordance with the requirements of the General and/or Special Requirements or as shown on the Drawings.

3.0 EXECUTION

3.1 INSTALLATION

3.1.1 Signs shall be installed level and properly spaced at a height as directed by the Engineer. Care shall be exercised to minimize damage to the mounting surface and to the sign itself.

3.1.2 Provide installation hardware and all necessary accessories to install the signs at the general locations described in this specification.

END OF SECTION

JUNE 2026 10400-3 SIGNS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 10520

SAFETY EQUIPMENT

1.0 GENERAL

1.1 WORK INCUDED

1.1.1 This Section includes all labor, materials, equipment, and incidentals required to install and provide fire extinguishers and safety equipment as specified herein.

1.2 SUBMITTALS

1.2.1 Submit to the Engineer for approval, Shop Drawings showing details of construction and erection. Submittals shall meet the requirements of Section 01300.

1.2.2 Product Data 1.2.2.1 Provide Code and Standard compliance, component dimensions, service sizes and finishes.

1.2.3 Record Documents 1.2.3.1 Record actual locations of supply isolation valves, emergency shower and eye wash equipment installed.

1.2.3.2 Provide full written description of manufacturer’s warranty.

1.2.3.3 Manufacturer’s Installation Instructions: Indicate assembly and support requirements, adjustment and testing procedures.

1.2.4 Operation and Maintenance Data:

1.2.4.1 Include installation instructions, exploded assembly views, servicing requirements, inspection data, installation instructions, spare parts lists, replacement part numbers and availability, and location and contact numbers of service depot for all components installed.

1.2.4.2 Include cleaning, testing, and adjustment procedures for all components installed.

1.3 DELIVERY, STORAGE, AND HANDLING

1.3.1 Accept equipment and materials on site in shipping containers and maintain in place until installation.

1.3.2 Protect installed equipment from damage and/or entry of foreign materials by temporary covers during the construction phase of this project.

1.3.3 Do not allow use of installed equipment for any reason, other than testing, during the construction phase of this project.

1.3.4 Protect all materials before and after installation from exposure to rain, freezing temperatures and direct sunlight.

JUNE 2026 10520-1 SAFETY EQUIPMENT

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

2.0 PRODUCTS

2.1 GENERAL

2.1.1 All materials shall meet or exceed all applicable referenced standards, federal, state and local requirements, and conform to codes and ordinances of authorities having jurisdiction.

2.1.2 Provide emergency equipment as indicated and scheduled on the Contract Drawings and as specified herein.

2.1.3 Pressure ratings of equipment and related accessories shall be suitable for the anticipated system pressures in which they are installed.

2.1.4 Equipment and components of same type shall be product of one (1) manufacturer.

2.1.5 All emergency equipment shall meet American with Disabilities Act (ADA) accessibility requirements for activation of controls and height of eye/face outlets.

2.1.6 Emergency equipment activation devices shall be designed so that the flushing water remains on without requiring the use of the operator's hands.

The valve shall be designed to remain activated until intentionally shut off.

2.2 COMBINATION EMERGENCY SHOWER AND EYE/FACE WASH

2.2.1 Provide Model 8300FP freeze protected combination shower and eyewash with AXION MSR" showerhead, or equal. Provide integral self-regulating 20 gpm flow control, stainless steel 11" (27.9 cm) round bowl, stainless steel eyewash yoke assembly with Soft-Flo ABS plastic eyewash anti-surge heads with integral flow controls and dust covers, two self-draining bury valves with frost-line depth of 42", two large zinc-plated steel push plates

with universal graphics, powder-coated cast-iron 9" diameter floor flange, universal sign, 3/4" NPT and 1-1/4" NPT inlet, and 1-1/4" NPT outlet. Provide MODEL MK8A & MK81A, or equal, for draining feed pipes.

2.2.2 Three-Sided Safety Sign: Model 9020 green and yellow ABS plastic 3-sided high visibility sign.

2.3 FIRE EXTINGUISHER

2.3.1 Fire extinguisher shall be installed at the methanol storage tank, under the canopy for the methanol chemical feed pumps and storage area.

2.3.2 Materials 2.3.2.1 All firefighting devices must comply with the provisions of the Occupational Safety and Health Act of 1974 (OSHA), Part 1926.

2.3.2.2 The fire extinguisher shall be a High-Flow Dry Chemical (ABC), as manufactured by Badger Fire Protection, Multipurpose ABC High Flow Fire Extinguisher, Model No. EXT-20MPHF-1, or equal.

JUNE 2026 10520-2 SAFETY EQUIPMENT

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.3.2.3 Fire extinguishers shall be furnished with a mounting bracket so it can be mounted to a steel column.

2.3.3 Installation 2.3.3.1 Install firefighting device as per Manufacturer's written instructions and code requirements.

2.3.3.2 Install fire extinguisher at a minimum height of four (4) feet and a maximum height of five (5) feet as measured from the floor to the top of the fire extinguisher.

2.4 FIRE BLANKET

2.4.1 Provide Model 9672-04 Water-Jel Technologies Heat Shield Fire Blanket, or equal.

2.4.2 Secure to canopy column with Model TL-10 Water-Jel Technologies mounting bracket, or equal.

2.5 LIFE RING BUOY

2.5.1 Contractor shall provide a total of two (2) 24” life ring buoys to be mounted on the handrail around the Post Anoxic Reactor. Life ring buoys shall be orange with reflective tape and shall be manufactured of closed-cell foam.

Buoy surface shall be Soft-Tex and rope looped. Life ring buoys to be model GO-X-24T as manufactured by Jim-Buoy, or equal.

2.5.2 Provide a stainless steel hanger for mounting each buoy to the handrail around the PAR tank.

2.6 ANTI-TRIP TREADS

2.6.1 Contractor shall provide and install a total of eight (8) anti-trip treads to be placed on the step up into the Methanol Storage Area from the adjacent sidewalk. Anti-Trip Treads shall be 6” by 24” and shall read “WATCH YOUR STEP”. Anti-Trip Treads shall be yellow with black stripes and shall be manufactured with sandpaper-like grit surface with an adhesive back. Space the ant-trip treads equally across the area of installation. Anti-trip treads to

be model S-19962 as manufactured by Uline, or equal.

3.0 EXECUTION

3.1 PREPARATION

3.1.1 Examine roughing-in for plumbing piping systems to verify actual locations of piping connections prior to installation of emergency equipment. Proceed with installation only after unsatisfactory conditions have been corrected.

3.1.2 Coordinate location of emergency equipment with General Contractor to allow identification of required clear floor space area for emergency shower access.

JUNE 2026 10520-3 SAFETY EQUIPMENT

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

3.2 INSTALLATION

3.2.1 Installation shall meet or exceed all applicable federal, state and local requirements, referenced standards and conform to codes and ordinances of authorities having jurisdiction.

3.2.2 All installation shall be in accordance with manufacturer’s published recommendations.

END OF SECTION

JUNE 2026 10520-4 SAFETY EQUIPMENT

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 11285

SLIDE GATES

1.0 GENERAL

1.1 DESCRIPTION

1.1.1 Contractor shall furnish and install Slide Gates and Operators as shown on Contract Drawings. Gates and operators shall be furnished complete with all necessary parts and accessories; and shall be fabricated, assembled and placed in proper operating condition in accordance with installation instructions and recommendations of the equipment manufacturer.

Equipment shall be the latest product design of a manufacturer regularly engaged in the production of equipment of this type.

1.1.2 The gates shall abide by the latest version of AWWA C561 as modified herein.

1.2 SUBMITTALS

1.2.1 Submittals shall be in accordance with Section 01300.

1.3 QUALITY ASSURANCE

1.3.1 All gates shall be shop inspected for proper operation prior to shipment.

1.3.2 Welds shall be performed by welders with ASME Section IX or AWS D1.6 certification.

1.3.3 The gate manufacturer shall be ISO 9001:2015 certified.

1.3.4 Slide gate manufacturer shall confirm in the submittal that it meets the requirements of section 1.3 of this specification.

2.0 PRODUCTS

2.1 GENERAL

2.1.1 The basis for the design of the slide gates is the Model RW750-S, manufactured by RW Gate Company, Troy, NY. Other “or equal” products/manufacturers may be submitted in accordance with the contract requirements.

2.2 MATERIALS OF CONSTRUCTION

2.2.1 All stainless steel referenced in this specification shall be Type 316, ASTM A240 or ASTM A276 as applicable, unless otherwise indicated herein.

2.2.1.1 All welded stainless steel components shall be constructed of Type 316L stainless steel.

2.2.1.2 All structural stainless steel used in the construction of slides and frames shall have a minimum material thickness of 1/4-inch.

2.2.1.3 All non-welded stainless steel components, excluding anchor bolts and assembly bolts, shall be Type 316 or Type 316L stainless steel.

JUNE 2026 11285-1 SLIDE GATES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

2.3 OPERATING STEM AND HARDWARE

2.3.1 The operating stem shall be of stainless steel and shall be designed to transmit in compression at least 2 times the rated output of the manual operating mechanism with an 80 lbs effort.

2.3.2 The stem shall have a slenderness ratio (L/r) less than 200.

2.3.3 The threaded portion of the stem shall have a minimum diameter of 1-1/2 inches.

2.3.3.1 The threads shall have machine rolled, full depth ACME threads.

2.3.3.2 Stub threads are not acceptable.

2.3.4 Stems provided in multiple pieces shall be provided with couplings.

2.3.4.1 Couplings shall be stainless steel and shall be internally threaded and keyed or bored and bolted.

2.3.5 Stem guides shall be constructed of stainless steel with UHMWPE bushings.

2.3.6 Gates shall have rising stems and shall be provided with a clear plastic stem cover.

2.3.6.1 The stem cover shall be butyrate and shall have a cap and condensation vents.

2.3.6.2 Clear mylar indicating tape shall be provided for field application after the gate has been installed and positioned.

2.3.7 Stop collars shall be provided to limit the downward travel on gates with manual operating mechanisms.

2.3.7.1 Stop collars shall be bronze and shall be internally threaded and provided with a stainless steel set screw.

2.3.8 Anchor bolts and assembly bolts shall be Type 316 stainless steel.

2.4 SEALS

2.4.1 The seal system shall consist of self-adjusting UHMWPE seals with a EPDM compression cord.

2.4.1.1 The UHMWPE seals shall be arranged to ensure that there is no metal-to-metal contact between the slide and frame.

2.4.1.2 The compression cord shall be contained by the UHMWPE seal so that it shall not be in contact with the slide.

2.4.1.3 On upward-opening gates, UHMWPE seals shall be provided.

2.4.1.4 The invert seal on upward opening gates shall use a compressible EPDM seal located in the invert of the frame.

a The invert seal shall be of a flush bottom arrangement.

JUNE 2026 11285-2 SLIDE GATES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project b The invert seal shall be mechanically fastened with stainless steel bolts.

c Invert seals attached solely by the use of adhesives are not acceptable.

2.4.1.5 All seats and seals shall be secured with assembly bolts. All seals shall be field removable and field replaceable without the need to remove the gate frame from the wall.

2.4.1.6 Anchor bolts shall not penetrate the seats or seals, and anchor bolts shall not prevent the removal or replacement of seats or seals.

2.4.1.7 The seal system shall have been shop tested with a minimum 30,000 cycle operating test in an abrasive environment to confirm the ability of the seals to withstand the abrasive condition with negligible deterioration and to confirm that the leakage restriction requirement is still possible.

a The shop test shall have been performed on a stainless steel slide gate, and the test results shall have been certified by the manufacturer in writing.

b A copy of the test shall be provided to the Engineer.

2.5 MANUAL OPERATORS

2.5.1 Handwheels shall be provided. Handwheels shall be constructed of stainless steel and shall have a maximum diameter of 24 inches. Cranks shall be constructed of stainless steel and have a maximum length of 15 inches.

2.5.2 Anchor bolts shall be 316 stainless steel, fully threaded and shall have a minimum diameter of 1/2-inch.

2.5.2.1 Anchor bolts shall be of the epoxy type.

2.6 SLIDE

2.6.1 The slide shall consist of a stainless steel plate that is reinforced with stiffeners to withstand the specified head conditions. The slide shall engage the frame a minimum of 1-inch on each side.

2.6.1.1 The slide shall be reinforced with plates or channel shaped members to restrict deflection to 1/16-inch or less at the design head.

2.6.1.2 The stiffeners shall be welded to the slide plate in the horizontal and vertical positions.

2.6.1.3 The portion of the slide that engages the frame shall have a minimum thickness of 1/2-inch.

2.6.1.4 On rising stem gates, a stem connector shall be welded to the slide as a means of connecting the operating stem. The bottom

JUNE 2026 11285-3 SLIDE GATES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project portion of the stem shall be affixed to the stem connector with a minimum of two attachment bolts.

2.7 FRAME

2.7.1 The frame shall be constructed of stainless steel plate, with the guide section formed into a C channel shape or similar to house the seal and shall be reinforced to withstand the specified operating conditions.

2.7.1.1 The guides shall be of a one-piece design with gussets that extend along the outside and top to accommodate unseating head.

2.7.1.2 The frame shall be wall mounted, as shown on the Contract Drawings.

a Frames shall be of the flanged frame type.

2.7.1.3 The guide portion of flanged frame gates shall have a minimum weight of 10 lbs/ft. The guide portion of the flanged frame, where the anchors penetrate, shall have a minimum thickness of 1/2- inch.

2.7.1.4 The guide extension portion of the frame shall have a minimum weight of 6 lbs/ft.

2.7.1.5 Lifting lugs shall be provided on all frame styles.

2.7.1.6 Yoke members shall be C channel shaped structural members.

2.8 OPERATING MECHANISM

2.8.1 Operating mechanisms shall be provided by the gate manufacturer.

2.8.2 Manual operators shall be floor stand mounted when shown in the Contract Documents.

2.8.2.1 Manual operators shall be of the bevel gear type suitable for operation with a portable operator.

2.8.2.2 Gear ratios shall be selected by the gate manufacturer to ensure that the maximum operating effort is 40 lbs at the design head.

2.8.2.3 Minimum gear ratio shall be 2:1.

2.8.2.4 Gearboxes shall have ductile iron housings, a bronze lift nut, steel gears and a stainless steel input shaft.

2.8.2.5 Roller bearings shall support the lift nut and input shaft.

2.8.2.6 The housing shall be grease lubricated and permanently sealed.

2.8.2.7 Adaptor plates shall be utilized to attach the operating mechanism to the yoke. Adaptor plates shall be stainless steel and shall have a minimum thickness of 3/4-inch.

2.9 FLOOR STANDS AND WALL BRACKETS

JUNE 2026 11285-4 SLIDE GATES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.9.1 Floor stands shall be mounted to the concrete or to a wall bracket, as shown on the Contract Drawings.

2.9.2 All floor stands and wall brackets shall be fabricated from stainless steel.

2.10 ACCEPTABLE MANUFACTURER

2.10.1 Slide gates and Operators shall be as manufactured by RW Gate Company, or equal.

3.0 EXECUTION

3.1 FINISH

3.1.1 All heat tint and slag from the welding process shall be passivated in accordance with ASTM A380. If bead blasting is used, the entire slide and entire frame shall be bead blasted.

3.1.2 All ferrous components shall be suitably prepared and then shop coated with primer. Finish coating shall be applied by the Contractor. The ductile iron operator housing shall be finish coated by the Contractor as specified in

section 09900.

3.2 INSTALLATION

3.2.1 Installation shall be performed in accordance with the gate manufacturer’s installation instructions and the approved installation drawings.

3.2.2 Installation instructions and installation drawings shall be found in the O&M manual.

3.2.3 Non-shrink grout shall be applied, by the Contractor, between the gate frame and the wall to ensure that there is no leakage around the gate.

3.3 FIELD SERVICE

3.3.1 A service technician shall be provided to instruct the Contractor for proper installation prior to the installation of the first gate. The service technician shall be available for a minimum of one (1) 8-hour workday at the project site.

3.4 EQUIPMENT INSTALLATION CERTIFICATION

3.4.1 The manufacturer, or the manufacturer’s representative, shall review the installation of the slide gates and provide an equipment installation certification per Part 8.0 of section 01300.

END OF SECTION

JUNE 2026 11285-5 SLIDE GATES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 11321

SUBMERSIBLE MIXERS

1.0 GENERAL

1.1 DESCRIPTION

1.1.1 Furnish and install 4 submersible mixers, with SS guide rails and SS lifting cables. One mixer shall be provided in each anoxic zone of the PAR tank.

Mixers shall be rated for continuous duty.

1.1.2 Each mixer shall be equipped with a 2.3 HP, submersible electric motor connected for operation on 460 Volts, 3 Phase, 60 Hz wire service. All cables shall be oil resistant chlorinated polyethylene rubber jacketed. Each unit shall be fitted with 30 feet of lifting cable of adequate strength to permit raising and lowering the mixers. Mixers specified herein shall have propeller code 042113SF and be capable a thrust of 295 N with a shaft horsepower not to

exceed 2.0 BHP in clear water. The mixer shall draw 3.6 Amps maximum when operating at the specified BHP and 480V. Total input power shall not exceed 2.3 kW.

1.2 SUBMITTALS

1.2.1 Submittals shall be in accordance with Section 01300.

1.3 QUALITY ASSURANCE

1.3.1 The mixer manufacturer shall perform the following inspections and tests on each mixer before shipment from the factory:

1.3.1.1 Propeller, motor rating, and electrical connections shall first be checked for compliance to the customer’s purchase order.

1.3.1.2 A motor and cable insulation test for moisture content or insulation defects shall be made.

1.3.1.3 Prior to shipment, the mixer shall be run dry to establish correct rotation and mechanical integrity.

1.3.1.4 A written report stating the foregoing steps have been done shall be supplied with each mixer at the time of shipment.

2.0 PRODUCTS

2.1 SUBMERSIBLE MIXERS

2.1.1 The mixers shall be capable of handling raw, screened sewage. The mixers shall be able to be raised and lowered and shall be easily removed for inspection or service without the need for personnel to enter the mixing vessel. A sliding guide bracket shall be an integral part of the mixer unit. The entire weight of the mixer unit shall be guided by a single bracket which must be able to handle all thrust created by the mixer. The FM approved mixer,

with its appurtenances and cable shall be capable of continuous

JUNE 2026 11321-1 SUBMERSIBLE MIXERS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project submergence under water without loss of watertight integrity to a depth of 57 feet.

2.1.2 Each mixer shall be of the integral design, close coupled, submersible type.

All components of the mixer, including motor shall be capable of continuous underwater operation. Major mixer components shall be of 316L stainless steel construction. The oil housing cover plate shall be of corrosion resistant composite. All exposed nuts and bolts shall be of stainless steel. In order to insure that the low velocity area around the f remains impervious to low PH solids and or liquid attack, the motor housing exterior shall be made of 316

Stainless Steel. All metal surfaces coming into contact with the mixed media, other than stainless steel, shall be protected by a factory applied spray coating of acrylic dispersion zinc phosphate primer with an epoxy finish coat on the exterior of the mixer.

2.1.3 The multi-pole motor shall be directly connected to the propeller; gearbox designs are not acceptable, to produce a propeller speed of 1675 RPM. The mixer motor shall be squirrel cage, induction, shell type design, housed in an air filled, watertight chamber. The stator windings shall be insulated with moisture resistant Class F insulation rated for 155 degrees Celsius. The motor shall be inverter duty rated in accordance with NEMA MG1, Part 31.

The motor shall be designed for continuous duty, capable of sustaining a maximum of at least ten (10) evenly spaced starts per hour. The rotor bars and short circuit rings shall be made of aluminum.

2.1.3.1 Thermal sensors shall be used to monitor the stator temperatures. The stator shall be equipped with three (3) thermal switches embedded in the end coils of the stator winding and set for 260 degrees Fahrenheit. These shall be used in conjunction with, and be supplemental to, external motor overload protection, and wired to the control panel.

2.1.3.2 Each pump motor stator shall incorporate three thermal switches, one per stator phase winding and be connected in series, to monitor the temperature of the motor. Should the thermal switches open, the motor shall stop and activate an alarm. A float switch shall be installed in the seal leakage chamber and will activate if leakage into the chamber reaches 50% chamber capacity, signaling the need to schedule an inspection.

2.1.3.3 The thermal switches and float switch shall be connected to a Mini CAS control and status monitoring unit. The Mini CAS unit shall be designed to be mounted in the local control station.

2.1.4 All mating surfaces where watertight sealing is required shall be machined and fitted with a double set of Nitrile rubber or Viton O-rings. Fitting shall be such that sealing is accomplished by metal-to-metal contact between machined surfaces. This will result in controlled compression of the O-rings

JUNE 2026 11321-2 SUBMERSIBLE MIXERS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project without requiring a specific torque limit. No secondary sealing compounds, rectangular gaskets, elliptical O-rings, grease or other devices shall be used.

2.1.5 The propeller shall be of 316 stainless steel dynamically balanced, nonclogging backward curved design. Each blade shall be laser cut and welded to the hub to ensure that the propeller is properly balanced. The propeller shall be capable of handling solids, fibrous materials, heavy sludge and other matter found in normal sewage applications. The propeller shall have two vanes, 8 9/32” in diameter with a blade angle of 13 degrees.

2.1.6 The mixer assembly shall incorporate a jet ring a full 360 degrees around the propeller. A maximum clearance of 1 ½ inches shall be maintained between the propeller tip and the shroud in order to maintain hydraulic efficiency and minimize power consumption.

2.1.7 The cable entry housing shall be an integral part of the back plate. The cable entry shall have a double set of elastomer grommets in order to ensure a redundant system in the event of a cable entry failure. Single sealing systems will not be deemed acceptable. The cable entry shall be comprised of two cylindrical elastomer grommets, each flanked by washers and a ferrule designed with close tolerance fit against the cable outside diameter and the

entry inside diameter. This will provide a leak proof seal at the cable entrance without the need for specific torque requirements. The assembly shall bear against a shoulder in the stator casing opening and be compressed by a gland nut threaded into it. Interaction between the gland nut and the ferrule should move the grommet along the cable axially instead of with a rotary motion. Cable entry housing is constructed of vinyl ester for shock and

chemical resistance.

2.1.8 The junction chamber and motor compartment shall be separated by a terminal board which shall protect the motor interior from foreign material gaining access into the mixer top. Connection shall be made between the threaded compressed type binder posts thus securely affixing the cable wires to the terminal board. The use of the terminal compressed type post, and a terminal board O-ring shall render the motor compartment leak proof

from any liquid which may enter the terminal compartment.

2.1.9 All bearings shall have a minimum L-10aa rated life of 100,000 hours and shall have inner and outer races of metal construction. Bearings with races made of nonmetallic construction will not be deemed acceptable or meeting the load handling and environmental requirements of this application. The outboard propeller bearing shall be an angular contact bearing. The motor shaft end shall be supported by two bearings. A roller and an angular contact

ball bearing shall take up the axial and radial loads while an angular contact ball bearing loading nut located on the motor end of the shaft in order to reduce shaft deflection and increase bearing life and seal life.

2.1.10 The oil housing shall contain two compartments consisting of an inner and an outer section with four ports to connect and facilitate oil flow. In the event

JUNE 2026 11321-3 SUBMERSIBLE MIXERS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project that the mixer media bypasses the other seal, this design will allow the outer compartment to collect the heavier (denser) fluids by means of a simple gravity process. Casing is constructed of vinyl ester for shock and chemical resistance.

2.1.11 Each mixer shall be provided with two sets of lapped end face type mechanical seals running in oil reservoirs for cooling and lubrication. The mechanical seals shall contain positively driven rotary, corrosion resistant, Tungsten Carbide/Tungsten Carbide face rings for the outer seal assembly and Tungsten Carbide/Tungsten Carbide seal face rings for the inner seal assembly. In order to avoid seal failure due to sticking, clogging and

misalignment from elements contained in the mixed media, only the seal faces of the outer seal assembly, and its retaining clips shall be exposed to the mixed media. All other components shall be contained in the oil housing.

One seal face of the inner seal pair has laser etched spiral grooves. As the seal rotates, these grooves act to pump any leakage back into the oil casing from out of the stator housing.

2.1.11.1 The seals shall require neither maintenance nor adjustment but shall be easy to check and replace.

2.1.12 In addition to the requirements listed above, for the installations which are considered to be in hazardous locations as defined by the National Electric Code (NEC), only mixers certified by Factory Mutual for use in such locations shall be used.

2.1.12.1 Specifically, the mixers used at the PAR shall be certified for use in all Class I, Division 2 locations as outlined in Articles 500-502 inclusive of the NEC Code.

2.1.13 Mixer Mount Assembly 2.1.13.1 Stainless steel mixer mount assembly shall be used to mount the mixer during operation and to guide the unit during installation and removal from service. The assembly shall consist of an upper, lower, intermediate (if needed) stainless steel bracket and positioning device. The mixer mast shall be designed in such a way that the mixer can be lowered onto and raised from the mast.

2.1.13.2 The assembly shall also include a Type 316 stainless steel support cable assembly and a minimum 2-inch Type 316 stainless steel mast as shown in the Contract Drawings.

2.1.13.3 The assembly shall include a stainless steel wall-mounted bracket to support and securely hold the mast assembly while allowing horizontal rotation of the mast through not less than 120 degrees. The upper guide holder assembly shall secure the system to the wall and shall provide lateral support for the guide pile and a securing device for the electrical motor cable. The mast bearings shall be constructed of Teflon.

JUNE 2026 11321-4 SUBMERSIBLE MIXERS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.1.13.4 The mast shall also be provided with cable holders for use with the mixer electric power cable (one every 5 ft.). Their purpose shall be to prevent the electric cable from being entangled in the mixer propeller during operation.

2.1.13.5 Unless specified elsewhere, the mast assembly shall be capable of proper operation with the mixer operating in any direction within the 120-degree travel. The mast shall be constructed with a positioning locking plate which will work in conjunction with a lock pin on the upper guide holder to positively lock the mast in place at various operating angles.

2.1.13.6 The assembly shall not spark during the raising and lowering of the mixers.

2.1.13.7 Post-Anoxic mixers shall be provided with a guide bracket to move the mixer mast away from the wall and capable of proper operation with the mixer operating in any direction within the 120- degree travel 2.1.14 Anoxic zone mixers shall be model 4620, as Manufactured by Flygt, or equal.

3.0 EXECUTION

3.1 MATERIAL HANDLING

3.1.1 At the time of delivery, all materials shall be inspected for shipping damage.

The freight company and the Manufacturer should be notified immediately of any damage or quantity shortages.

3.2 INSTALLATION

3.2.1 All installation shall be in accordance with manufacturer’s published recommendations.

3.3 WARRANTY

3.3.1 The anoxic mixer equipment supplier shall provide a minimum full two (2) year warranty on all components of the anoxic mixers commencing from Substantial Completion.

3.4 SPARE PARTS

3.4.1 Provide a basic Repair Kit for each Flygt mixer, model 4620, or equal.

3.5 START-UP AND TRAINING

3.5.1 The manufacturer shall schedule two (2) trips to the project site for startup and training assistance, as described herein:

3.5.1.1 The equipment manufacturer shall furnish a qualified representative for a minimum of one (1) day (up to 8 hours) to inspect the mixing equipment and to supervise field testing and start up by the Contractor.

JUNE 2026 11321-5 SUBMERSIBLE MIXERS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.5.1.2 The equipment manufacturer shall furnish manufacturer certified training staff for a period of one (1) day (up to 8 hours) to train the Owner’s staff on use and function of the mixing equipment.

3.5.2 After the mixers have been placed into operation, the Manufacturer's Representative and/or the Contractor shall make any and all required adjustments for proper operation.

3.6 INSTALLATION CERTIFICATION

3.6.1 Installation of all equipment shall be in strict accordance with the Manufacturer's recommendations as approved by the Engineer. Furnish services of the Manufacturer's technical representative to supervise the initial phase of setting and aligning of the equipment and after the installation is completed, for start-up testing and instruct the Owner is proper maintenance.

3.6.2 Provide manufacturer’s installation certification per section 01300 of the contract documents.

END OF SECTION

JUNE 2026 11321-6 SUBMERSIBLE MIXERS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 11345

CHEMICAL FEED PUMPING EQUIPMENT

1.0 GENERAL

1.1 DESCRIPTION

1.1.1 This specification covers the supply and testing of chemical feed pumps for the Methanol system shown on the Contract Drawings.

1.1.2 Pumps shall be positive displacement peristaltic type complete with springloaded pump-head, self-contained variable speed drive, and flexible extruded tube as specified.

1.1.3 Peristaltic pumping action is created by the compression of the flexible tube between the pump-head rollers and track, induced forward fluid displacement within the tube by the rotation of the pump rotor, and subsequent vacuum-creating restitution of the tube.

1.1.4 Pumps shall be dry self-priming, capable of being run dry without damaging effects to pump or tube and shall have a maximum suction lift capability of up to 30' vertical water column. Maximum pressure rating: 30 psi.

1.1.5 Flow shall be in the direction of the rotor rotation, which can be reversed and shall be proportional to rotor speed.

1.1.6 The chemical feed system shall include the UL-approved, positive displacement peristaltic type chemical metering pumps and all necessary piping, valves, fittings, supports, electrical controls, and accessories as shown in the Contract Drawings and as specified herein.

1.2 Related Work Described Elsewhere 1.2.1 Section 05200 – Miscellaneous Metals.

1.2.2 Section 11346 – Chemical Storage 1.2.3 Section 15060 – Mechanical Piping and Accessories 1.2.4 All wiring, motor starters, electrical connections and other electrical equipment, unless specifically included herein, shall be furnished under Division 16.

1.3 QUALITY ASSURANCE

1.3.1 This specification is the basis for design of peristaltic metering pumps. All pumps, whether named as an acceptable supplier or submitted, as an equal must, at a minimum, meet the following critical design requirements.

1.4 SUBMITTALS

1.4.1 Submittals shall be in accordance with Section 01300.

1.4.2 Submittals shall include, among other data: Characteristic performance curve showing flow rate as a function of RPM and pressure; dimensional drawings; and wiring instructions.

JUNE 2026 11345-1 CHEMICAL FEED

PUMPING EQUIPMENT

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

1.5 PRODUCT HANDLING

1.5.1 Protection 1.5.1.1 Use all means necessary to protect the materials of this Section before, during, and after installation and to protect the installed work and materials of all other trades.

1.5.2 Replacement 1.5.2.1 In the event of damage, immediately make all repairs and replacements necessary to the approval of the Engineer and at no additional cost to the Owner.

1.5.3 Shipping 1.5.3.1 Ship pump and drive assembled complete. Ship tubing separately packed in a continuous length. Required length for installation shall be cut by the Contractor, with the remaining tubing stored for spare replacement.

1.5.3.2 Pack all additional spare parts in containers bearing labels clearly designating contents and pieces of equipment for which intended.

1.5.3.3 Deliver spare parts at the same time as pertaining equipment.

Deliver to Owner after completion of work.

1.5.4 Receiving 1.5.4.1 Contractor to inspect and inventory items upon delivery to site.

1.5.4.2 Contractor to store and safeguard equipment, material, instructions, and spare parts in accordance with manufacturer's written instructions.

2.0 PRODUCTS

2.1 GENERAL

2.1.1 Provide four (4) methanol chemical feed pumps for use at the Biolac and post anoxic reactor. Two pumps are provided for both discharge locations with one pump of each set serving as a standby pump.

2.1.2 All chemical feed system equipment and accessories shall be located at the Methanol Feed Station as shown on the Contract Drawings.

2.1.3 Chemical piping shall be routed by the Contractor. The Contractor shall route new piping in such a way to minimize bends and travel distance.

2.1.4 The Contractor shall provide Chemical Storage in accordance with Section 11346 Chemical Storage.

2.2 CHEMICAL FEED PUMPS

2.2.1 Provide a total of four (4) chemical feed pumps as shown in the Contract Drawings.

2.2.2 Chemical feed pumps shall be Watson-Marlow, Model 521V, positive displacement peristaltic type, complete with spring-loaded 520REL

JUNE 2026 11345-2 CHEMICAL FEED

PUMPING EQUIPMENT

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project LoadSure pump-head, self-contained variable speed drive, and flexible extruded tube as specified, or equal.

2.2.3 Pumps shall be dry self-priming, capable of being run dry without damaging effects to pump or tube and shall have a maximum suction lift capability of up to 30' vertical water column. Maximum pressure rating: 30 psi.

2.2.4 Flow shall be in the direction of the rotor rotation, which can be reversed and shall be proportional to rotor speed.

2.2.5 Design Criteria Biolac Influent PAR Influent Existing Design Existing Design Item Conditions Conditions Conditions Conditions Tubing Material Marprene II Marprene II Tubing ID (mm) 3.2 3.2 Capacity (GPH) 0 – 0.88 0 – 0.94 Pump Speed (RPM) 6 - 57 6 - 57 Displacement per 0.0004 0.0004 Revolution (gal) Min Flow Rate 0.0027 0.0027

(GPH)

Max Flow Rate 5.83 5.83

(GPH)

Req. Flow Rate 0.88 0.94

(GPH)

Max TDH (ft) 9.3 4.0 Suction Head (ft) 3.67 3.67 Voltage (VAC) 480 480 Frequency (Hz) 60 60 Phase 3 3 2.2.6 Pump Construction 2.2.6.1 Pump-Head a Pump-head shall be 520REL LoadSure low pressure pump-head with quick-release sanitary connectors.

b Pump-head shall consist of a fixed track, a hinged guard door, two spring-loaded tube clamp mechanisms, and spring-loaded roller rotor assembly.

c Pump tubing shall be in contact with the inside diameter of the track through an angle of 180 degrees and be held in place on the suction and discharge by a spring loaded self-adjusting clamp mechanism.

d At all times, one roller shall be fully engaged with the tubing providing complete compression and preventing back flow or siphoning.

e Tube occlusion and spring tension shall be factory set to accommodate 2.4mm wall thickness tubing and shall not require adjustment for accommodating tubing of 3.2mm.

JUNE 2026 11345-3 CHEMICAL FEED

PUMPING EQUIPMENT

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project f Pump-head guard shall be transparent for the purpose of viewing direction of rotation.

g When closed, the pump-head guard shall seal against the pump track for leak containment and controlled waste through the pump-head waste port in the event of a tube failure.

2.2.6.2 Pump-head Assembly a Pump Track Geometry must have a minimum 96.6mm swept diameter through a minimum track angle of 180 degrees .

b Provide high corrosion/impact-resistant materials as specified:

i Track Construction: polyphenylene sulfide (PPS) ii Guard Construction: hinged impact-resistant polycarbonate breakaway guard, tool un-lockable for operator safety.

iii Rotor Construction: polyphenylene sulfide (PPS) c For ex-proof applications additional grounding shall be provided for the pump-head at the factory to help prevent build-up of static electricity. This project is an explosion proof application.

2.2.6.3 Tube Retainer Mechanism a Two spring–loaded adjustable tube retainer mechanisms shall be provided to secure the tubing at the entry and exit points of the pump-head.

2.2.6.4 Rotor Assembly a Provide rotor assembly that ensures gradual tube occlusion and compensates for tube tolerance:

i Twin spring-loaded roller arms located 180 degrees apart; each fitted with stainless steel helical springs and compressing roller for occlusion of the tube twice per rotor revolution

a) Compressing Rollers: 316SS with low friction

stainless steel bearings and PTFE seals, minimum diameter of 18mm.

ii Provide non-compressing guide rollers constructed of corrosion resistant Nylatron.

b Clutch i Equip rotor with a central handgrip hub and manually activated clutch to disengage the rotor from the drive for manual rotor rotation during tube loading. Clutch

JUNE 2026 11345-4 CHEMICAL FEED

PUMPING EQUIPMENT

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project shall automatically reengage rotor to gearbox upon one complete revolution.

c Mounting i To prevent slip, the rotor assembly shall be axially secured to the dogged output shaft of the gearmotor via a slotted collet and central retaining screw.

2.2.6.5 Tubing a Pump tubing shall be in contact with the inside diameter of the track (housing) through an angle of 180 degrees and be held in place on the suction and discharge by tube retainer clamps.

b The tubing shall be replaceable without the use of tools and with no disassembly of the pump-head.

c Pump tubing shall be constructed of Marprene II, a thermoplastic elastomer with a 64 Shore A durometer and 2.4mm wall thickness.

d Tubing must be replaceable with the rotor in the stopped position.

e Supply 15-meter roll of 3.2 mm continuous tubing size for each pump; tubing elements are not acceptable for exproof applications.

2.2.6.6 Gear Reducer and Motor a Gear reducer and motor i Gear reducer shall be double reduction helical in line gearing with a housing constructed of SAE Class 30 cast iron.

ii Gearbox output shaft and face shall accept the direct coupling of the peristaltic pump-head.

iii Gearing shall be manufactured to AGMA Class 11-12 requirements with an overall gearbox rating of AGMA Class II under continuous operation.

iv Motor shall be XPFC design, 1/3 HP, XP rated, Class F insulation, 1.15 motor service factor, 4 pole, 230/460VAC, 60 Hz, 3-phase, inverter duty, 10:1 constant torque speed range, 56C.

2.2.6.7 Spare Parts a Supply one spare pump-head assembly with rotor for each pump.

b Supply 1 box (15m) of 1.6 mm Marprene Tubing per chemical pump, 4 boxes total.

c Supply 1 box (15m) of 3.2 mm Marprene Tubing per chemical pump, 4 boxes total.

JUNE 2026 11345-5 CHEMICAL FEED

PUMPING EQUIPMENT

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project d Supply 1 box (15m) of 4.8 mm Marprene Tubing per chemical pump, 4 boxes total.

2.3 ACCESSORIES

2.3.1 The following accessories shall be provided with the chemical feed pump system:

2.3.1.1 Calibration Columns a Calibration column shall be a 2.5” diameter, 500 mL column placed on the suction side of the chemical feed pumps, as shown on the Contract Drawings. The calibration column shall have a capacity of 16 GPH.

b The column shall have an NPT connection, loose cap style, and a PTFE encapsulated O-ring.

c The column shall have a maximum pressure rating of 15 psi and maximum temperature rating of 140.

d Calibration column shall be the CP-1-500-L-T as manufactured by Sigmamotor, or equal.

2.3.1.2 Ball Valves a Stainless Steel i Provide 1/4" FNPT Type 316 SS Ball valves as indicated on the Contract Drawings.

ii Valve shall be of one-piece, 2-way construction with straight, stainless steel valve body and full-port stainless steel ball.

iii Ball valve seat shall be PFA and seal shall be PTFE.

All exposed nuts, bolts, springs, washers, etc. shall be stainless steel.

iv The 1/4-inch ball valve shall be model H-810M-SS as manufactured by Ham-Let Group or approved equal.

b PVC i Provide 1" PVC Ball valves as indicated on the Contract Drawings.

ii Valve shall be of one-piece construction with straight, PVC valve body and full-port PVC ball. Ball valve seat and seal shall be EPDM. Ball valve shall have socket connections compatible with SCH 80 PVC pipe.

iii The 1-inch ball valve shall be 6700WS Series ProLine Ball Valve as manufactured by B+K, LLC, or approved equal.

2.3.1.3 Check Valves a Provide 1/4" NPT x FNPT stainless steel inline check valve as indicated on the Contract Drawings.

JUNE 2026 11345-6 CHEMICAL FEED

PUMPING EQUIPMENT

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project b Valve shall be have Viton O-ring with all other components being stainless steel.

c The 1/4-inch check valve shall be model 101134 as manufactured by Discover Valve or approved equal.

2.3.1.4 Pulsation Dampeners a Each pump shall have one (1) properly sized pulsation dampener on the discharge piping.

b Each pulsation dampener shall be fabricated of material resistant to the pumped solution and shall include an air changing valve and air gauge.

c The pulsation dampener shall be sized to limit surges between 5 and 10 percent of mean pressure.

3.0 EXECUTION

3.1 SHIPPING, HANDLING, DELIVERY AND STORAGE

3.1.1 The Contractor shall inspect all equipment upon delivery on site and immediately report any defects or damaged equipment to the manufacturer and Owner.

3.1.2 Any equipment that is determined damaged shall be repaired or replaced at no cost to the Owner.

3.1.3 The Contractor is to assume responsibility for the equipment to prevent damage during site storage

3.2 TESTING AND INSTALLATION

3.2.1 Major Equipment 3.2.1.1 Installation of all equipment shall be in strict accordance with the Manufacturer's recommendations as approved by the Engineer.

Furnish services of the Manufacturer's technical representative to supervise the initial phase of setting and aligning of the equipment and after the installation is completed, for start-up testing and instruct the Owner is proper maintenance.

3.2.1.2 Provide manufacturer’s installation certification per section 01300 of the contract documents.

3.2.1.3 Upon completion of the work, and prior to its acceptance by the Owner, make all required field tests.

3.3 START-UP AND TRAINING

3.3.1 The manufacturer shall schedule two (2) trips to the project site for startup and training assistance, as described herein:

3.3.1.1 The equipment manufacturer shall furnish a qualified representative for a minimum of one (1) day (up to 8 hours) to inspect the pumping equipment and to supervise field testing and start up by the Contractor.

JUNE 2026 11345-7 CHEMICAL FEED

PUMPING EQUIPMENT

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.3.1.2 The equipment manufacturer shall furnish manufacturer certified training staff for a period of one (1) day (up to 8 hours) to train the Owner’s staff on use and function of the chemical pumping equipment.

3.3.2 After the pumps have been placed into operation, the Manufacturer's Representative and/or the Contractor shall make any and all required adjustments for proper operation.

END OF SECTION

JUNE 2026 11345-8 CHEMICAL FEED

PUMPING EQUIPMENT

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 11346

CHEMICAL STORAGE

1.0 GENERAL

1.1 DESCRIPTION

1.1.1 The Contractor shall furnish, install, test, and place in satisfactory operation a 1,000-gallon aboveground methanol storage tank system as specified herein and as shown on the Contract Drawings.

1.1.2 The tank shall be constructed and listed in accordance with Underwriters Laboratories, Inc. (UL) Standard 2085, Protected Aboveground Storage Tanks for Flammable and Combustible Liquids. The tank system shall be listed for ballistics protection in accordance with UL Standard 752, Levels 5, 6 and 8.

1.1.3 The tank system must comply with all provisions of the following:

1.1.3.1 UFC 79-7, Appendix A-II-F, for both Vehicle Impact Protection and Projectile Resistance

1.1.3.2 NFPA 30

1.1.3.3 NFPA 30A

1.1.3.4 IFC Chapter 57 1.1.3.5 IFC Chapter 23 1.1.4 Related Work Described Elsewhere 1.1.4.1 Section 02600 – Yard Piping 1.1.4.2 Section 05500 – Miscellaneous Metals 1.1.4.3 Section 11345 – Chemical Feed System 1.1.4.4 Section 15060 – Mechanical Piping and Accessories

1.2 RELATED WORK

1.2.1 Section 02600 – Yard Piping 1.2.2 Section 05200 – Miscellaneous Metals.

1.2.3 Section 11345 – Chemical Feed Pumping Equipment 1.2.4 Section 15060 – Mechanical Piping and Accessories

1.3 SUBMITTALS

1.3.1 Shop Drawings 1.3.1.1 The Contractor shall furnish complete Shop Drawings in accordance with section 01300 showing the dimensions of the equipment, material, method of assembly and installation. Shop Drawings shall be prepared by qualified equipment manufacturers.

1.3.1.2 The Engineer's approval will cover general features of the equipment, its arrangement and conformance with the

JUNE 2026 11346-1 CHEMICAL STROAGE

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project specifications, but the Contractor shall still be responsible for details of design, dimensions, installation and proper functioning of the equipment.

1.3.1.3 If, for the equipment proposed by the Contractor, any structure changes are required, the Contractor shall prepare and submit for approval, complete drawings showing all necessary changes and all such changes shall be made at the Contractor's expense.

1.3.2 Operation and Maintenance Manual 1.3.2.1 Upon completion of the installation and as a condition of its acceptance, the Contractor shall furnish copies of operation and maintenance manuals, in accordance with the provision of

Section 01300, Submittals.

1.4 PRODUCT HANDLING

1.4.1 Protection 1.4.1.1 Use all means necessary to protect the materials of this section before, during and after installation and to protect the installed work and materials of all other trades.

1.4.2 Replacement 1.4.2.1 In the event of damage, immediately make all repairs and replacements necessary to the approval of the Engineer and at no additional cost to the Owner.

1.5 WARRANTY

1.5.1 The tank system shall be warranted by the manufacturer against defects in material or workmanship for 30 years following the delivery of the tank.

2.0 PRODUCTS

2.1 GENERAL

2.1.1 All chemical tanks and associated chemical feed system equipment and accessories shall be located as shown on the Contract Drawings. Chemical feed system equipment is described in specification section 11345.

2.1.2 Chemical piping shall be routed by the Contractor. The Contractor shall route chemical piping in such a way to minimize bends and travel distance. Piping shall be designed in accordance to minimum specifications described herein and in accordance with Section 15060, Mechanical Piping and Accessories and 02600.

2.2 Primary Tank 2.2.1 The stainless steel primary tank shall be of double wall construction and provide secondary containment of the primary storage tank contents by an impervious carbon steel outer wall.

2.2.2 The tank shall be rectangular in shape and listed per UL Standard 142 and designed for possible future relocation. Welds shall be continuous on all sides and exterior seams, conforming to the American Welding Society Standard for continuous weld.

JUNE 2026 11346-2 CHEMICAL STROAGE

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.2.3 The primary steel tank shall be pressure tested at 5 psig for a minimum of 24 hours. All openings shall be from the top only.

2.2.4 The tank shall be supplied with emergency vents for the primary and secondary tanks. See paragraph 2.14 and associated subparagraphs.

2.2.5 A 6 Mil High-Density Polyethylene liner shall enclose the double wall tank and insulating material to protect against corrosion by isolating the tank and secondary containment from the concrete or other corrosive material.

2.3 Secondary Containment and Corrosion Protection 2.3.1 The interstitial monitoring area between the primary and secondary tanks shall be a true void, insuring the immediate migration of any liquid contents to the monitoring point and reliability for verifiable pressure testing in accordance with the requirements of the Department of Defense Uniform Facilities Criteria 3-460-01 (Design: Petroleum Fuel Facilities) and 3-406-03

(Operations & Maintenance: Maintenance of Petroleum Systems).

2.3.2 The secondary containment must be tested for tightness at the manufacturing plant and in the field before commissioning and use. Testing documentation shall be submitted to the Owner or Owner’s representative and included in the O&M manual.

2.4 Concrete Encasement 2.4.1 A vaulted concrete enclosure shall encase and must protect both the primary and secondary containment steel tanks.

2.4.2 The concrete encasement shall be 6” thick with a minimum design strength of 4,000 psi.

2.4.3 The concrete design shall include the following for long-term durability:

2.4.3.1 Air entrainment 2.4.3.2 Water-reducing admixture 2.4.3.3 Steel reinforcement.

2.4.4 Concrete placement shall be a visually verifiable monolithic (seamless) pour to ensure the absence of voids on all sides and beneath the steel tank.

2.4.5 The double wall steel tank shall be pressurized to 5 psig during concrete encasement to allow for expansion and contraction of the tank.

2.4.6 The vault enclosure shall have non-corrosive concrete support legs of unitized monolithic construction raising the concrete enclosure a minimum of 3” above the ground to meet visual inspection requirements.

2.5 Thermal Protection 2.5.1 The tank system construction shall include thermal insulation by covering the double wall steel tank with a minimum of .25” thick polystyrene panels to protect against extreme temperatures.

2.6 Ballistics and High Explosive (HE) Blast Resistance 2.6.1 The tank system shall bear a UL label for the security listing under Ballistics Standard 752, Levels 5,6 and 8, signifying bullet-resisting protection against

JUNE 2026 11346-3 CHEMICAL STROAGE

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project penetration, passage of fragments of projectiles, or fragmentation of the vault enclosure to the extent that any protected material, including the secondary containment and primary tank are not damaged.

2.6.2 Ballistics Testing UL 752 Ratings Table Protection # of Distance Grain Ammunition Level Shots 7.62 mm rifle lead core full metal copper Level 5 1 15 150 jacket, military ball (.308 caliber) 9.00mm full metal copper jacket with Level 6 5 15 124 lead core 7.62 mm rifle lead core full metal copper Level 8 5 15 150 jacket, military ball (.308 caliber) 2.6.3 Blast Effects Analysis (BEA) 2.6.3.1 The tank system design shall have been subjected to a Blast

Effects Analysis (BEA) assessing resistance and performance under the following blast threat scenarios per the FEMA 426 - Reference Manual to Mitigate Potential Terrorist Attacks Against Buildings:

Blast Resistance Table Weight of Explosive Standoff Blast Scenario Device Distance Man-portable improvised explosive device 50 pound 5 feet

(MPIED)

Vehicle-borne improvised explosive device 500 pound 20 feet

(VBIED)

Vapor cloud explosion (VCE) 10 psi NA 2.6.3.2 The BEA shall conclude that the tank system will resist the explosion loads and remain intact, without failure of the primary tank or movement of the tank exceeding 2”.

2.6.3.3 Tank designs that do not protect the primary tank AND secondary containment by providing both Ballistics and Blast Effect resistance as specified in this section will not be permitted.

2.7 Fire Resistance 2.7.1 The tank system shall be designed and tested to provide 2-hour fire protection for the primary tank as per UL 2085 2-hour furnace fire test and 2 hour simulated pool fire test.

2.7.2 The average maximum rise in temperature of the primary tank during the test shall not exceed 260° F and the maximum temperature of any single point on the primary tank shall not exceed 400° F.

JUNE 2026 11346-4 CHEMICAL STROAGE

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.7.3 No steel members shall penetrate the walls or floor of the concrete encasement to assure isolation from pool fire heat.

2.8 Leak Monitoring 2.8.1 A thru-tank leak detection monitoring tube terminating between the primary tank and the secondary containment tank shall be provided to monitor any leaks from the primary tank.

2.8.2 Provide a leak sensor, as explained in paragraph 2.13.4.4.

2.9 Spill/Overfill Containment 2.9.1 The tank system shall include a UL listed 7-gallon spill/overfill container manufactured as an integral part of the primary tank, surrounding the fill pipe, and protected by 2-hour fire rating of the enclosure.

2.9.2 The spill/overfill container shall include a stick port and normally closed drain valve to release spilled product into the main tank.

2.9.3 Exterior steel shall be stainless steel.

2.10 Overfill Protection 2.10.1 Overfill protection shall be provided by the following methods:

2.10.1.1 Direct reading level gauge visible from fill pipe access 2.10.1.2 Valve rated for pressurized delivery located within fill pipe to close automatically at 95% full level.

2.10.1.3 Audible High level alarm 2.11 Fill Connection 2.11.1 The tank shall be provided with a 4” fill nipple for use in filling the tank with methanol. 4” nipple will provide a direct fill connection on the tank.

2.11.2 The 4” fill nipple shall connect to a 2” diameter, 4’ long drop tube inside the tank using the manufacturer provided 2” camlock and adaptor.

2.12 Finishes 2.12.1 The tank system exterior shall be a low maintenance architectural coating or exposed aggregate concrete finish.

2.12.2 All exposed steel, with the exception of stainless steel, shall be antioxidant powder coated to inhibit corrosion and meet ASTM B117.

2.13 Fittings 2.13.1 Fittings shall be 304 Stainless Steel.

2.14 Accessories 2.14.1 Combination Conservation Vent & Flame Arrester 2.14.1.1 A combination conservation vent and flame arrestor with an open vent design shall be provided on the 6” primary emergency vent.

The combination conservation vent and flame arrestor shall be 3”.

JUNE 2026 11346-5 CHEMICAL STROAGE

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.14.1.2 The combination conservation vent and flame arrestor shall have an FKM diaphragm, with all other components being 316 stainless steel.

2.14.1.3 The combination conservation vent and flame arrestor shall have full faced flanged connections, designed with an ANSI 150 lb pressure rating.

2.14.1.4 The combination conservation vent and flame arrestor shall be provided with a 3” stainless steel vent riser. Riser shall be of adequate length to mount the combination conservation vent and flame arrestor 12’ above finished grade, as shown on the contract drawings.

2.14.1.5 The combination conservation vent and flame arrestor shall be the model 94570 Combination Conservation Vent and Flame Arrestor, as manufactured by Shand & Jurs, or equal.

2.14.2 Pressure Relief Vent 2.14.2.1 A 6” pressure relief vent shall be provided on the secondary emergency vent.

2.14.2.2 The vent shall have an FKM diaphragm, with all other components being 316 stainless steel.

2.14.2.3 The vent shall have full faced flanged connections, designed with an ANSI 150 lb pressure rating.

2.14.2.4 Vent seat and pallet shall be coated in an ‘all-weather’ Teflon coating.

2.14.2.5 Vent shall be model 94160 Pressure Relief Vent, as manufactured by Shand & Jurs, or equal.

2.14.3 Clock Gauge 2.14.3.1 Morrison 818, or equal with NPT connection, aluminum body, standard units, and standard stainless steel float and cable.

2.14.4 Tank monitoring/gauging kit 2.14.4.1 TMS 2000 or equal with a NEMA 4X enclosure, alpha-numeric display, four (4) input/output relays, level gauging probe with stainless steel float, install kit, and a stainless steel leak sensor.

a Contractor to include all fittings and accessories required to mount instruments to the tank.

2.14.4.2 Four Relay Expansion a Four relay expansion is required. It shall be 1 Form C, rated for 10A at 120 VAC or 6A at 240 VAC, and have 4 opto-isolated inputs. Relays shall be used to communicate the following alarms to the plant control panel, located in the existing control building:

i Tank high level alarm ii Tank low level alarm

JUNE 2026 11346-6 CHEMICAL STROAGE

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project iii Primary tank failure alarm (leak detection)+ 2.14.4.3 Level Gauging Probe a Magnetostrictive Float, with reflection resolution doubling and a 2” NPT riser mount tank fitting shall be provided for tank level monitoring in the primary tank.

b Level probe shall have a minimum accuracy of 0.0005” when measuring product level in the tank.

c Level probe shall have a 316 S.S. shaft and float and shall be rated for 150 PSI.

d Probe shall be provided with a 2” S.S. riser pipe and cap, purchased separately.

e Probe shall be installed into a vertical riser pipe with the probe foot contacting the tank bottom.

f Level gauging probe shall be the MP450S, as manufactured by Pneumercator Company, or equal.

2.14.4.4 Leak sensor a Leak senser shall be a magnetic float with a hermetically sealed reed switch, with a pass-thru opening size of 2” NPT.

b Sensor float, housing, and stem shall be made of 316 S.S.

c Sensor shall be supplied with a 22 AWG, Teflon-jacketed S.S. cable, 25’ in length.

d Contractor to provide the accessories required for mounting the probe to the methanol tank via a 2” tank connection.

e Leak sensor shall be the LS600LDSS, as manufactured by Pneumercator Company, or equal.

3.0 EXECUTION

3.1 INSTALLATION, TRAINING, AND CERTIFICATION

3.1.1 The tank system shall be installed in strict accordance with the manufacturer’s recommendations, industry standards, and applicable fire and environmental codes. All state and local permits shall be obtained prior to installation.

3.1.2 The tank system shall be handled, lifted, stored and installed in accordance with the manufacturer’s instructions on a reinforced concrete base slab designed to support the fully loaded tank.

3.1.3 Tanks shall be marked on all sides with warning signs and product identification as required by applicable codes.

3.1.4 Grounding conductors from the reinforcing steel/ground ring at the methanol feed station shall be connected to the two (2) bolts on the tank system for

JUNE 2026 11346-7 CHEMICAL STROAGE

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project lightening protection in accordance with NFPA 780 and all electrical work shall be in accordance with applicable codes.

3.1.4.1 Tank grounding system shall be tested in accordance with 16450.

3.1.5 Contractor shall provide methanol for system testing and shall provide a full tank of methanol for substantial completion.

3.1.6 The manufacturer shall schedule two (2) trips to the project site for startup and training assistance, as described herein:

3.1.6.1 The equipment manufacturer shall furnish a qualified representative for a minimum of one (1) day (up to 8 hours) to inspect the tank and to supervise field testing and start up by the Contractor.

3.1.6.2 The equipment manufacturer shall furnish manufacturer certified training staff for a period of one (1) day (up to 8 hours) to train the Owner’s staff on use and function of the tank.

3.1.7 After the tank has been placed into operation, the Manufacturer's Representative shall make any and all required adjustments for proper operation.

3.1.8 The Manufacturer’s Representative shall provide written certification regarding proper installation in accordance with Section 01300 of the specifications.

END OF SECTION

JUNE 2026 11346-8 CHEMICAL STROAGE

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 11350

ROBOTIC BIOSOLIDS REMOVAL FROM BIOLAC AERATION BASIN

1.0 PROJECT OVERVIEW

1.1 This specification details the performance requirements for the removal, thickening, and transfer of approximately 136,000 gallons of accumulated biosolids from the existing, in-service, Biolac aeration basin to the existing onsite storage lagoon approximately 700 feet away, to the west on the WWTP site. The Work shall be executed by the following solids removal contractor (SRC), or approved equal:

1.1.1 Sciphyn Robotic Sludge Removal 1.1.1.1 Houston, TX 1.1.1.2 (877) 757-5751 1.2 A primary requirement is that the aeration basin must remain online and fully operational throughout the entire duration of the project with minimal hydraulic disruption to the plant's treatment process. An exception to this is when the pre- and post-mapping is performed.

1.3 The existing Biolac basin has an XR-5 8130 geomembrane liner. The SRC shall take extreme precautions to avoid damaging the existing liner with any and all equipment used to remove and dewater the biosolids.

1.4 The existing Biolac basin is approximately 104 feet L x 35 feet W at its bottom with 1.5:1 side slopes and an overall depth of approximately 10 feet with a liquid depth of approximately 8 feet.

1.5 The Work shall be done in accordance with the sequence of construction described in Section 01000. The General Contractor and the SRC shall coordinate with the Owner for any necessary temporary bypass of flow around the basin or temporary shutdown of individual basin aeration chains.

2.0 SCOPE OF WORK

2.1 The General Contractor is responsible for providing the following:

2.1.1 Water source to clean equipment at completion of project.

2.1.2 Make up water for the Vessel, as needed.

2.1.3 Crane or forklift support for set up and teardown.

2.2 The SRC shall provide all necessary labor, equipment, materials, and supervision to perform the following tasks:

2.2.1 Mobilization and Setup 2.2.1.1 Transport all required equipment to the site, including the underwater robot, pumps, hoses, a temporary settling tank, generator, and a chemical dosing system.

JUNE 2026 11350-1 ROBOTIC BIOSOLIDS REMOVAL

FROM BIOLAC AERATION BASIN

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.2.1.2 Position and assemble the equipment in a manner that ensures safe operation and does not interfere with plant personnel or vehicle access.

a The dewatering equipment is to be staged on the south side of the existing Biolac basin, as shown in the Contract drawings.

2.2.2 Process Configuration 2.2.2.1 The SRC shall set up a closed-loop system as follows:

a The underwater robot will pump the biosolids slurry from the basin floor.

b The slurry will be dosed in-line with a suitable settling chemical (e.g., polymer, flocculant) prior to discharge into the settling tank. The Contractor shall select the appropriate polymer based on sludge, application, and conditions.

c The settling tank will allow biosolids to concentrate and settle in a collection hopper or sump.

d Clarified supernatant will overflow a weir within the settling tank and be pump returned to the headworks building. This will ensure the supernatant flow will have ample residence time to settle out any remaining polymer, avoiding any clogs to the existing downstream WWTP equipment.

e Concentrated (thickened) biosolids will be pumped from the bottom of the settling tank to the designated on-site lagoon using equipment and piping/hosing provided by the solids removal contractor.

2.2.3 Biosolids Removal and Thickening 2.2.3.1 Systematically navigate the underwater robot across the entirety of the basin floor to ensure thorough removal of accumulated solids.

2.2.3.2 Operate the chemical/polymer dosing system to effectively condition the biosolids for rapid settling. The Contractor is responsible for supplying the chemical/polymer and determining the optimal dosage.

2.2.3.3 Continuously manage the settling tank to maintain a clear supernatant and effectively thicken the biosolids.

JUNE 2026 11350-2 ROBOTIC BIOSOLIDS REMOVAL

FROM BIOLAC AERATION BASIN

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.2.4 Monitoring and Reporting 2.2.4.1 The SRC shall provide daily reports to the General Contractor/Owner/Engineer detailing the hours worked, estimated volume of biosolids removed, and any operational issues.

2.2.5 Solids Mapping 2.2.5.1 The SRC shall provide mapping of the aeration basin solids before and after solids removal in accordance with 3.1.6 of this specification.

2.2.6 Demobilization and Cleanup 2.2.6.1 Upon completion, the General Contractor and the SRC shall flush all equipment, remove it from the site, and restore the work area to its original condition.

3.0 PERFORMANCE REQUIREMENTS

3.1 The SRC’s performance will be measured against the following key metrics:

3.1.1 Removal Efficiency 3.1.1.1 A minimum of 95% of the accumulated biosolids volume shall be removed from the aeration basin. This will be verified by comparing pre- and post-project sludge depth maps, as discussed in section 3.1.6. Sludge maps shall be reviewed by the Owner or Owner’s representative.

3.1.2 Thickened Sludge Concentration 3.1.2.1 The concentrated biosolids transferred to the lagoon must have a minimum average concentration of 5% solids by weight. This concentration shall be visually inspected during the removal process.

a The Owner reserves the right to test the solids being returned to the lagoon to confirm the Contractor is meeting the stated requirement. If testing shows this requirement is not being met, the Contractor must adjust the process to increase the percent solids concentration.

Additional testing will be done to confirm the adjustments meet the requirement.

3.1.3 Asset Protection 3.1.3.1 There shall be no direct damage to the Biolac basin's geomembrane liner, aeration chains, diffusers, or any other internal appurtenances by the equipment, personnel, or process used by the solids removal contractor. Existing damage to the listed items, if any, shall not be the Contractor’s responsibility to repair.

JUNE 2026 11350-3 ROBOTIC BIOSOLIDS REMOVAL

FROM BIOLAC AERATION BASIN

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.1.3.2 The underwater robot shall be equipped with ample protections to prevent any damage to the existing Biolac geomembrane liner.

These protections shall include the following:

a 13-inch Rubber Tires b 9-inch Rubber-Lined Auger i 6-inch metal center core with a 3-inch rubber blade c 7-inch minimum ground clearance 3.1.3.3 If liner damage is found to be directly caused by the SRC’s equipment, personnel, or process, the SRC and the General Contractor shall be responsible for any required repairs, including but not limited to the repair/replacement of the Biolac geomembrane liner. The SRC or General Contractor shall not be

responsible for existing damage to the liner, if any.

3.1.4 Operational Integrity 3.1.4.1 The wastewater treatment process shall not be negatively impacted by things such as excessive polymer dosing that may impact downstream processes, due to the SRC’s activities.

a The Owner reserves the right to test the supernatant after initial steady state operation of the dewatering operations to determine if there is excessive polymer addition. The SRC shall adjust dosage as needed to prevent excessive polymer dosing.

3.1.5 Stoppages 3.1.5.1 The SRC should expect that debris such as rags, paper products, hygiene products, etc. may be present and may negatively impact the solids processing and removal. The SRC should anticipate an average of 4-5 stoppages per workday to clear debris from the equipment. Any stoppages beyond this would be considered excessive and the SRC may request use of the contingent daily rate item provided in the bid form following the

requirements of the Contract Documents. In general, additional days of work may be added to the Contract to compensate the SRC for the additional time and effort caused by the excessive debris.

3.1.6 Quality Assurance 3.1.6.1 Pre and Post Mapping of the Biolac a The SRC and General Contractor shall coordinate with the Owner to shut off air to the existing aeration basin for a period of 2-hours; 1 hour for settling of solids and 1 hour for scanning of the aeration basin bottom.

JUNE 2026 11350-4 ROBOTIC BIOSOLIDS REMOVAL

FROM BIOLAC AERATION BASIN

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project b The Contractor will be responsible for performing premapping of the accumulated sludge that has settled on the bottom of the Biolac basin. Pre-mapping shall be completed prior to the start of work using a robot with sonar capabilities. A sediment map shall be created with a minimum of 100 points. This map will show the amount of sludge to be removed across the tank. A copy of this

map shall be provided to the General Contractor, Engineer, and Owner.

c After the solids removal is completed, post-mapping of the Biolac will take place to show the accumulated sludge remaining in the Biolac. A sediment map shall be created with a minimum of 100 points. This map will show the amount of sludge remaining across the tank. A copy of this map shall be provided to the General Contractor, Engineer, and Owner.

d The Engineer and/or Owner shall review and compare the pre and post maps of the accumulated sludge.

i If any areas do not meet 95% removal or have more than 4” accumulation of solids remaining in any one location across the bottom of the Biolac basin, the sludge removal robot shall be deployed again until adequate sludge levels are met.

ii Post mapping shall be performed again after additional sludge removal procedures are completed.

This will continue until adequate solids levels are met.

4.0 EQUIPMENT SPECIFICATIONS

4.1 Unmanned Underwater Robot 4.1.1 Must be a commercially proven unit designed for high-solids environments.

It shall be equipped with a variable-speed submersible pump capable of handling abrasive slurries and biosolids.

4.1.2 The underwater robot shall be equipped with ample protections to prevent any damage to the basin liner. These protections shall include the following:

4.1.2.1 13-inch Rubber Tires 4.1.2.2 9-inch Rubber-Lined Auger a 6-inch metal center core with a 3-inch rubber blade 4.1.2.3 7-inch minimum ground clearance 4.2 Settling Tank 4.2.1 Must be of sufficient volume to provide adequate residence time for solids settling at the anticipated pumping rate. It shall be constructed of steel or

JUNE 2026 11350-5 ROBOTIC BIOSOLIDS REMOVAL

FROM BIOLAC AERATION BASIN

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project other durable material and equipped with an adjustable overflow weir, a sloped bottom or hopper for sludge collection, a supernatant outlet, and a sludge discharge port.

4.3 Chemical Dosing System 4.3.1 Shall include a variable-rate metering pump to allow for precise control of the chemical dose.

4.4 Pumps and Hoses 4.4.1 All pumps and hoses used for slurry and thickened sludge transfer must be rated for abrasive duty and have leak-proof connections.

5.0 SUBMITTALS

5.1 The SRC must submit the following for approval prior to commencing work:

5.1.1 Work Plan 5.1.1.1 A detailed plan outlining the methodology, project schedule, equipment specifications, anticipated crew size, a general approach to maintain consistent daily progress, and pre and post mapping procedures.

5.1.2 Safety Plan 5.1.2.1 A site-specific health and safety plan, including a Spill Prevention, Control, and Countermeasure (SPCC) plan.

5.1.3 Chemical Information 5.1.3.1 Safety Data Sheet (SDS) and technical specifications for the proposed settling chemical.

5.1.4 Work History & Experience Requirements 5.1.4.1 To verify qualifications, the SRC shall provide a brief summary of relevant experience and a minimum of three (3) comparable project references completed within the past five (5) years, including project name, location, and owner contact information.

5.1.4.2 The SRC shall demonstrate it meets the following qualifications:

a The SRC performing the submerged solids/sludge removal portion of the Work shall be a firm that routinely performs submersible sludge removal in water-containing basins, tanks, or similar structures using remoteoperated/robotic cleaning equipment.

b The SRC shall demonstrate experience completing similar work while the facility remains online and in service, and in a manner that does not require confined space entry for solids removal activities.

JUNE 2026 11350-6 ROBOTIC BIOSOLIDS REMOVAL

FROM BIOLAC AERATION BASIN

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project c The SRC shall utilize purpose-built submerged solids removal equipment capable of operating underwater and removing accumulated solids via slurry pumping to the designated solids handling system.

d The SRC shall provide equipment sufficient to maintain steady progress and minimize downtime, including appropriate pumping capacity, hoses, and power supply required for continuous operation.

6.0 MEASUREMENT AND PAYMENT

6.1 Refer to section 00330 Bid Form and 00950 Measurement and Payment.

END OF SECTION

JUNE 2026 11350-7 ROBOTIC BIOSOLIDS REMOVAL

FROM BIOLAC AERATION BASIN

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 11375

AERATION EQUIPMENT

1.0 GENERAL

1.1 DESCRIPTION

1.1.1 Provide three (3) KENC Series regenerative blower packages with all related appurtenances. Each blower package should include the following at a minimum:

1.1.1.1 Regenerative blower and motor with oil-free operation 1.1.1.2 Integral filter change indicator 1.1.1.3 Integral pressure gauge with isolation valve 1.1.1.4 Base plate 1.1.1.5 2-inch check valve 1.1.1.6 2-inch pressure relief valve 1.1.1.7 2-inch inlet filter 1.1.1.8 Required piping 1.1.1.9 Cooling fan 1.1.1.10 Sound/weather enclosure 1.1.2 Provide one (1) diffuser system for post-aeration portion of the post anoxic

reactor (PAR). The diffuser system shall include twelve (12) coarse bubble diffusers, six (6) diffusers per side of the PAR.

1.2 GENERAL BLOWER CONSTRUCTION

1.2.1 Provide blower, drive unit, and accessories required for complete blower unit assembly and installation by Contractor.

1.2.2 Blower shall be suitable for continuous operation at the conditions stated herein without excessive noise, vibration, heating or any damage to blower.

1.3 SUBMITTALS

1.3.1 Submittals shall be provided in accordance with section 01300.

1.3.2 The Operation and Maintenance Manuals shall be furnished in accordance with Section 01300.

1.4 SOURCE QUALITY CONTROL

1.4.1 The blower package supplier must be an Authorized Distributor and Factory Authorized warranty center for the geographical area in which the blower is being installed.

JUNE 2026 11375-1 AERATION EQUIPMENT

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

2.0 PRODUCTS

2.1 PACKAGE BLOWER SYSTEM

2.1.1 DESIGN CONDITIONS

2.1.1.1 The blower shall have a maximum capacity of at least 115 SCFM at 0 in. H O and a maximum discharge pressure of 213 in. H O.

2 2 Calculate CFM based on local elevation and an ambient temp of 59˚F.

2.1.1.2 Blower frequency shall not exceed 60 HZ.

2.1.1.3 The motor shall be 5.1 hp and 3 phase/460V.

2.1.1.4 Blower shall have an estimated noise level, fully piped without a sound enclosure, of 71 dB (A) at one (1) meter open field test.

2.1.2 ACCESSORIES

2.1.2.1 Inlet filter and filter change indicator (integral to enclosure) 2.1.2.2 Pressure relief valve and gauge (integral to enclosure) 2.1.2.3 Check valve on discharge 2.1.2.4 Coupling 2.1.2.5 Flexible Tube adapter 2.1.2.6 Ball valve 2.1.2.7 Noise/weather enclosure

2.1.3 MOTOR DRIVE

2.1.3.1 Motor: Provide a horizontal flow, direct coupled and OSHA Guard motor with the following characteristics:

a 230/460 volt, 3 phase, 60Hz, 3600 RPM.

b Horsepower: 5.1 HP 2.1.4 Ball Valve 2.1.4.1 Ball valve shall be a 2”, 316 Stainless Steel, two-way, full port ball valve.

2.1.4.2 Ball valve shall have a stainless steel handle, 316 SS ball and stem, PTFE seat and seal, with FNPT connections.

2.1.5 Check Valve 2.1.5.1 Check valve shall be a 2”, Stainless Steel, inline, 2-way, silent check valve, by APOLLO, or equal.

2.1.5.2 Check valve shall have an RPTFE seat and ball, EPDM seal, and a 316 SS spring, with FNPT connections.

JUNE 2026 11375-2 AERATION EQUIPMENT

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

2.1.6 ENCLOSURE

2.1.6.1 Provide three (3) sound/weather enclosures, one for each blower installed. For each enclosure provide the following:

a Size: 39” L X 25” W X 31” H .

b Outer shell: powder coated aluminum.

c Provide 1-inch acoustical foam on roof and end panels.

d Provide 1-inch acoustical foam insulation on all interior sides of the enclosure including the removable side panels, with the exception of the bottom to allow for blower mounting. Side panels should have no penetrations for piping. Side panels shall be removable with handles.

2.1.7 APPROVED MANUFACTURERS

2.1.7.1 Republic Manufacturing, KENC-Series Model 4RC610-H26, or equal.

2.2 COURSE BUBBLE DIFFUSERS

2.2.1 Each diffuser shall consist of an inverted air reservoir, air diffusion ports, and a deflector.

2.2.2 The air diffusion ports shall be located on horizontal planes on two levels to discharge air into the liquid and shall include a full length slot on each side of the diffuser body. The deflector shall be located on the bottom of the diffuser to improve the oxygen transfer efficiency and prevent debris and stringy material from plugging the diffuser.

2.2.3 The body of the diffuser shall be constructed of 316L stainless steel. The end cap shall be cast stainless steel conforming to the requirements of ASTM 296, Grade CF3, and shall have an integral hex nut and 3/4" NPT connection equivalent to Schedule 80 pipe. The end cap shall be fully welded to the diffuser body. The air diffusion ports shall be a combination of 3/8” and 1/2” holes.

2.2.4 Each diffuser shall be capable of discharging 3 to 12 cfm, with a design point of 8 cfm per diffuser.

2.2.5 Diffusers shall be Closed-Bottom Coarse Bubble Diffusers, Model Number D-12, as manufactured by Sanitaire, or equal.

3.0 EXECUTION

3.1 INSTALLATION

3.1.1 Piping and Base Installation 3.1.1.1 Blower assembly shall be installed on a concrete pad and shall be leveled and anchored by Contractor as shown on the plans.

JUNE 2026 11375-3 AERATION EQUIPMENT

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.1.1.2 Contractor shall support piping to eliminate pipe strain on the blower casings.

3.1.1.3 Blower shall be piped as shown on the plans.

3.1.1.4 Contractor shall supply all hardware necessary to anchor unit per manufacturer specifications.

3.1.1.5 Penetrations for blower piping shall be field verified.

3.1.2 Lubricants 3.1.2.1 All initial blower lubricants to be supplied by the blower supplier and applied by Contractor.

3.2 SPARE PARTS

3.2.1 Provide two (2) additional inlet filter elements for each blower, Part Number 340-2206 – 1.25-1.5in Pressure Element

3.3 START-UP AND TRAINING

3.3.1 Blower package supplier shall be factory authorized and shall provide training and start up services. Supplier to instruct the Owner in operation and maintenance procedures and to certify to the Engineer that the equipment is installed and operates correctly.

END OF SECTION

JUNE 2026 11375-4 AERATION EQUIPMENT

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 11389

MISCELLANEOUS EXISTING BIOLAC SYSTEM IMPROVEMENTS

1.0 GENERAL

1.1 DESCRIPTION

1.1.1 The existing extended aeration system at the Sudlersville WWTP is a Biolac extended aeration system as provided by Parkson. The existing plant control panel (PCP) located in the existing electrical room controls the following existing components: blowers, air control valves at the extended aeration lagoon, chemical feed systems (alum, NaOH, carbon), RAS/WAS systems, clarifiers, pinch valve upstream of the existing upflow sand filters, the lift

pumps upstream at the existing upflow sand filters, and the existing upflow sand filters. The existing PCP also monitors various instrumentation, generates alarms, and sends alarm signals to a separate RTU for remote annunciation of various alarms/status points.

1.1.2 Contractor to furnish and install a replacement DO Probe and diffusers at the existing Biolac aeration basin. The diffuser and probe shall be furnished complete with all necessary parts and accessories; and shall be fabricated, assembled and placed in proper operating condition in accordance with installation instructions and recommendations of the equipment manufacturer. Equipment shall be the latest product design of a

manufacturer regularly engaged in the production of equipment of this type.

1.1.3 Contractor to work with Parkson (Biolac) to investigate and rehabilitate the existing WAS controls; modify the existing control sequence at the existing Biolac control panel to allow for control/monitoring of the methanol feed system to the Biolac influent and to the PAR influent, control/monitor the new equipment at the PAR, receive/send out new signals/alarms described in this section and other related sections; and provide training on the overall Biolac

treatment system to the plant operators.

1.2 SUBMITTALS

1.2.1 Submittals shall be in accordance with Section 01300.

1.3 RELATED WORK

1.3.1 01000 – Summary of Work 1.3.2 11345 – Chemical Feed Pumping Equipment 1.3.3 11350 – Biolac Sludge Handling and Removal 1.3.4 13300 – Instrumentation 1.3.5 Division 16 – Electrical Specifications (16965, etc.)

JUNE 2026 11389-1 MISCELLANEOUS BIOLAC

SYSTEM IMPROVEMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

2.0 PRODUCTS

2.1 EQUIPMENT AND INSTRUMENTATION REPLACEMENT

2.1.1 DO Probe 2.1.1.1 Replace the existing DO probe in the Biolac effluent box with a Dissolved Oxygen, Hach LDO sc Probe, Model 2, or equal. See specification section 13300.

2.1.2 Diffuser Assemblies 2.1.2.1 The existing diffuser assemblies will be replaced completely, including the connection to the floating header and the entire diffuser assembly below the water line.

a The diffusers will be replaced with the Biofuser 2204 Assembly, as manufactured by Parkson.

b Any existing diffusers that are in working condition shall be salvaged and turned over to the Owner and stored as emergency backups should they be needed in the future.

2.1.2.2 The following spare parts shall be provided, packaged for long term storage:

a 28 spare diffuser membranes 2.1.2.3 The moving aeration chain system must be able to completely mix activated sludge using less than 4 SCFM air/1000 ft3 basin volume.

2.2 WAS CONTROLS INVESTIGATION AND REHABILITATION

2.2.1 The WAS pumps do not currently run in auto. When an automation schedule is selected and inputted at the Biolac control panel, the pumps do not turn and follow this automation schedule.

2.2.2 Investigation and rehabilitation of the WAS controls shall include, but not be limited to, the following:

2.2.2.1 The existing WAS pump and their controls/programming shall first be examined by a Parkson representative to check for any errors in the programming of the WAS pumps.

a A representative from Parkson shall perform a site visit and/or confirm the existing Rover remote access device is operable during this portion of the work.

2.2.2.2 Contractor to identify if control signals are energized at the Biolac control panel and if they are received by the WAS pump motor starters at the MCC and at the WAS pump motors themselves.

JUNE 2026 11389-2 MISCELLANEOUS BIOLAC

SYSTEM IMPROVEMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project a If the signals are not being sent and received properly, then a Megger test will need to be run on the wire to measure the electrical resistance in the wires.

b If there is physical damage to the wires, they will need to be rerun and landed at the control panel and/or at the pump motors/motor starters.

c Physical and/or programming updates that are required to solve the existing issues with the WAS pumps must be completed prior to plant startup and testing.

2.2.2.3 Additional testing and repairs, as required to diagnose and correct the existing issues with the WAS controls.

2.3 CHEMICAL FEED CONTROLS MODIFICATION

2.3.1 General 2.3.1.1 The existing Biolac PLC programming shall be modified to take instrument input from existing and proposed instrumentation to control the methanol feed pumps for the PAR influent and, separately, the Biolac influent. Separate HMI screens shall be provided for each dosing location so that the operator can change important parameters as described herein. The proposed additional Biolac PLC hardware is described in other sections of

this specification as well as other specifications in Division 16.

2.3.1.2 The modifications described in section 2.3 shall be performed by the original PLC supplier and programmer, Parkson.

2.3.2 PAR Influent Methanol Feed Control Logic 2.3.2.1 The control logic shall use the recycle flow rate, the RAS flow rate, and the influent pump station flow rate to calculate the total PAR influent flow rate to the PAR influent channel. The PLC will calculate the continuous rolling average of the total PAR influent flow rate based on an operator settable number of minutes, with the default value being 15 minutes. The HMI will have a field for

the operator to enter the number of minutes the rolling average is calculated.

2.3.2.2 The control logic shall monitor the PAR influent nitrate and dissolved oxygen concentrations in the PAR influent channel via the nitrate and dissolved oxygen (DO) sensors at the PAR influent channel, monitor and calculate the average effluent nitrate concentration between the two effluent nitrate sensors in the PAR, and monitor and calculate the average ORP level between the two ORP sensors in the PAR.

a Field settable dampening settings (1 minute, 2 minutes,, etc.) shall be available to “smooth” the reading for the

JUNE 2026 11389-3 MISCELLANEOUS BIOLAC

SYSTEM IMPROVEMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project parameters listed in the previous paragraph.

2.3.2.3 The PLC shall utilize the information described in the previous two paragraphs to create a feed-forward strategy to dose Methanol based on the rolling average PAR influent flow, influent nitrate, and influent DO. The PLC shall also be programmed with a PID feed-back loop to trim the methanol dosing rate based on the effluent nitrate concentration.

a The PLC shall calculate the influent nitrate load (mass) based on the rolling average influent flow and the delta between the influent nitrate concentration and the field settable effluent target nitrate concentration.

b The PLC shall calculate the DO load (mass) based on the rolling average influent flow and the DO concentration in the PAR influent channel.

c The PLC shall accept field settable values for the methanol dosing ratio for both, and separately, the DO and the nitrate concentration.

d The PLC shall calculate the feed forward rate of methanol at the PAR tank influent channel based on the combined methanol needs from the DO and the nitrate concentration 2.3.2.4 The PLC shall also utilize a feed-back (PID) calculation to trim the feed forward methanol dosing rate.

a The PLC shall utilize the average effluent nitrate concentration as the process variable, an operator settable effluent nitrate concentration setpoint, and a multiplier factor as the control variable.

b If the average effluent nitrate level is greater than the setpoint, the program shall increase the control variable.

c If the average effluent nitrate level is less than the setpoint, the program shall decrease the control variable.

The control variable will have a minimum value of zero.

d The operator shall be able to adjust the frequency at which the control variable is calculated (i.e., 1 minutes, 2 minutes, etc).

2.3.2.5 The final feed forward pump speed sent to the chemical feed pumps shall be the feed forward rate multiplied by the PID output factor calculated in the trim calculation.

2.3.2.6 The average ORP reading shall be used to reduce the final feed forward pump speed. At a low ORP (-200 mV and lower), the

JUNE 2026 11389-4 MISCELLANEOUS BIOLAC

SYSTEM IMPROVEMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project methanol feed pump speed shall be decreased. The average ORP reading shall also be used to increase the final feed forward pump speed if the ORP is high (0 mV and higher). The high and low ORP thresholds shall be operator settable from the HMI screen.

2.3.2.7 The PLC shall consider the operator settable tubing size installed at the methanol feed pumps. The operator will be able to select from three tubing sizes, 1.6 mm, 3.2 mm, or 4.8 mm. The HMI screen shall have a field for the operator to select the tube size installed.

a The selected tube size will be used by the PLC to determine the min and max feed rates from the Methanol feed pumps and use that information to determine the speed input to the Methanol feed pumps.

b The 1.6 mm tube size shall have a min/max feed rate of 0.04/0.41 gallons per hour (GPH), the 3.2 mm tube size shall have a min/max feed rate of 0.17/1.9 GPH, and the 4.8 mm tube size shall have a min/max feed rate of 0.38/3.96 GPH.

c The PLC shall maintain speed to the methanol feed pumps, as recommended by the pump manufacturer, while the pumps are being called to run. When the required dose is less than the minimum speed, the PLC shall use a pulse width modulation style program to achieve any dose from zero up to the pump minimum.

2.3.2.8 The chemical feed pump control strategy shall maintain a minimum pump and motor speed, as recommended by the pump manufacturer, while running. When the required dose is less than the minimum speed, the controller shall use a pulse width modulation style program to achieve any dose from zero up to the pump minimum.

2.3.2.9 The calculated dosing rate shall be displayed on the HMI.

2.3.2.10 If the average ORP reading is higher than 50 mV for more than 30 minutes, a high ORP alarm shall be displayed locally and sent out via the RTU/SCADA system. If the average ORP reading is lower than -150mV for more than 30 minutes, a low ORP alarm shall be displayed locally and sent out via the RTU/SCADA system. Both the time and the high/low ORP setpoint shall be field settable by the operator from the HMI screen.

2.3.2.11 If the high or low pressure switch downstream of the PAR methanol feed pumps is activated, the PLC shall stop the chemical feed pump, display a local alarm at the HMI, and send

JUNE 2026 11389-5 MISCELLANEOUS BIOLAC

SYSTEM IMPROVEMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project an alarm to the RTU/SCADA system. See section 16965.

2.3.3 Biolac Influent Methanol Feed Control Logic 2.3.3.1 The operator will be able to choose between two methods from the HMI screen depending on the need for a minimum F:M ratio in the Biolac or the need for a minimum BOD:TKN ratio in the Biolac influent. The HMI shall have a digital selector switch to choose which control scheme to use.

2.3.3.2 Minimum F:M Control Scheme a In general, the PLC shall calculate the volume (gallons) of Methanol needed to satisfy the operator selectable minimum F:M ratio based on the variables described in the following subparagraphs. The necessary Methanol volume will then be dosed over 24 hours via the methanol feed pumps, and the PLC will control the speed of the Methanol feed pumps to deliver the required volume of

Methanol over 24 hours.

b Variables i Rolling Influent Average Daily Flow, Gallons Per Day The rolling average daily flow shall be based on the flow through the influent pump station flow meter and the operator selectable number of days the rolling average is to be based on (i.e., 7 days = 7 day rolling average). Recycle flow and RAS flow are not to be considered. The PLC shall sum the flow through the flow meter on a daily basis and calculate a rolling daily

average based on operator selected number of days.

ii Average Influent BOD, mg/L The average influent BOD will be an operator entered value based on field testing. The HMI screen shall have a field for the operator to enter the average influent BOD.

iii Average Mixed Liquor Suspended Solids (MLSS), mg/L The average MLSS will be an operator entered value based on field testing. The HMI screen shall have a field for the operator to enter the average MLSS.

iv Volume of Biomass, gallons The volume of biomass will be an operator entered value based on the volume of the Biolac. The HMI

JUNE 2026 11389-6 MISCELLANEOUS BIOLAC

SYSTEM IMPROVEMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project screen shall have a field for the operator to enter the value. The default value shall be 330,000 gallons.

v Target F:M Ratio, unitless The target F:M ratio will be an operator entered value.

The HMI screen shall have a field for the operator to enter the target F:M ratio.

vi Tube Size Installed at the Methanol Feed Pumps, mm The Tube Size will be an operator selected value. The operator shall be able to choose 1.6 mm, 3.2 mm, or 4.8 mm tube sizes. The HMI screen shall have a field for the operator to select the tube size installed.

The selected tube size will be used by the PLC to determine the min and max feed rates from the Methanol feed pumps and use that information to determine the speed input to the Methanol feed pumps.

The 1.6 mm tube size shall have a min/max feed rate of 0.04/0.41 gallons per hour (GPH), the 3.2 mm tube size shall have a min/max feed rate of 0.17/1.9 GPH, and the 4.8 mm tube size shall have a min/max feed rate of 0.38/3.96 GPH.

The PLC shall maintain speed to the methanol feed pumps, as recommended by the pump manufacturer, while the pumps are being called to run. When the required dose is less than the minimum speed, the PLC shall use a pulse width modulation style program to achieve any dose from zero up to the pump minimum.

vii Available COD per Gallon of Methanol, lbs/gal The available COD per gallon of Methanol will be an operator entered value based the strength of methanol being used. The HMI screen shall have a field for the operator to the value. The default value will be 9.9 lbs of COD per gallon of Methanol.

c The PLC will calculate the pounds of biomass based on the volume of the biomass and the MLSS, the pounds of influent BOD based on the rolling average daily flow and the average influent BOD, the number of pounds of BOD needed to meet the target F:M ratio based on the pounds of biomass, determine the pounds of supplemental COD needed based on the delta between pounds of BOD

JUNE 2026 11389-7 MISCELLANEOUS BIOLAC

SYSTEM IMPROVEMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project needed for the target F:M ratio and the pounds of influent BOD, and then determine the gallons of Methanol needed to provide the pounds of supplemental COD based on the available COD per gallon of methanol. The PLC will then set the speed of the Methanol feed pumps to deliver the supplemental volume of Methanol over 24 hours.

2.3.3.3 Minimum BOD:TKN Ratio Control Scheme a In general, the PLC shall calculate the volume (gallons) of Methanol needed to satisfy the operator selectable minimum BOD:TKN ratio based on the variables described in the following subparagraphs. The necessary Methanol volume will then be dosed over 24 hours via the methanol feed pumps, and the PLC will control the speed of the Methanol feed pumps to deliver the required

volume of Methanol over 24 hours.

b Variables i Rolling Influent Average Daily Flow, Gallons Per Day The rolling average daily flow shall be based on the flow through the influent pump station flow meter and the operator selectable number of days the rolling average is to be based on (i.e., 3 days = 3 day rolling average). Recycle flow and RAS flow are not to be considered.

The PLC shall sum the flow through the flow meter on a daily basis and calculate a rolling daily average based on the operator selected number of days. The default value will be a 3-day rolling average. The maximum value for the number of days will be 7.

ii Average Influent BOD, mg/L The average influent BOD will be an operator entered value based on field testing. The HMI screen shall have a field for the operator to enter the average influent BOD.

iii Average Influent TKN, mg/L The average influent TKN will be an operator entered value based on field and lab testing. The HMI screen shall have a field for the operator to enter the average influent TKN.

iv Target BOD:TKN Ratio, unitless

JUNE 2026 11389-8 MISCELLANEOUS BIOLAC

SYSTEM IMPROVEMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project The target BOD:TKN ratio will be an operator entered value. The HMI screen shall have a field for the operator to enter the target F:M ratio.

v Tube Size Installed at the Methanol Feed Pumps, mm The Tube Size will be an operator selected value. The operator shall be able to choose 1.6 mm, 3.2 mm, or 4.8 mm tube sizes. The HMI screen shall have a field for the operator to select the tube size installed.

The selected tube size will be used by the PLC to determine the min and max feed rates from the Methanol feed pumps and use that information to determine the speed input to the Methanol feed pumps.

vi Available COD per Gallon of Methanol, lbs/gal The available COD per gallon of Methanol will be an operator entered value based the strength of methanol being used. The HMI screen shall have a field for the operator to the value. The default value will be 9.9 lbs of COD per gallon of Methanol.

2.3.3.4 The PLC will calculate the pounds of influent TKN based on the rolling average daily flow and the average influent TKN, the pounds of influent BOD based on the rolling average daily flow and the average influent BOD, the number of total pounds of BOD needed to meet the target BOD:TKN ratio based on the pounds of influent TKN and the target BOD:TKN ratio, determine the pounds of supplemental COD needed based on the delta

between the pounds of BOD needed for the target BOD:TKN ratio and the pounds of influent BOD, and then determine the gallons of Methanol needed to provide the pounds of supplemental COD based on the available COD per gallon of

JUNE 2026 11389-9 MISCELLANEOUS BIOLAC

SYSTEM IMPROVEMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project Methanol. The PLC will then set the speed of the Methanol feed pumps to deliver the supplemental volume of Methanol over 24 hours.

2.3.4 The calculated dosing rate from either control scheme shall be displayed on the HMI.

2.3.5 If the high or low pressure switch downstream of the Biolac methanol feed pumps is activated, the PLC shall stop the chemical feed pump, display a local alarm at the HMI, and send an alarm to the RTU/SCADA system. See

section 16965.

2.3.6 Alarms, analog signals, and status points received by the Biolac Control Panel shall be displayed locally and trend screens provided. See 16965 for additional information and requirements.

2.4 PAR EQUIPMENT CONTROL AND INSTRUMENTATION MONITORING

2.4.1 The existing Biolac Control Panel (BCP) shall be modified by Parkson as follows for PAR equipment control and instrumentation monitoring:

2.4.2 Provide an HMI screen(s) for the PAR that shows each mixer’s status, each reaeration blower’s status, PAR instrumentation readings, trends for the PAR instrumentation readings, and control of the off/on status of the mixers and blowers.

2.4.3 Provide local alarms associated with the PAR equipment and instrumentation as described 16965.

2.4.4 Provide control of the reaeration blowers and PAR mixers as described in 16965.

2.5 EXISTING AND NEW I/O MODULES AT THE EXISTING BIOLAC CONTROL

PANEL

2.5.1 The following information includes the existing and proposed equipment in the existing Biolac control panel in the existing electrical room, and how it will be used for the proposed changes under this Contract. The existing PLC is Allen Bradley 1769-L33ER and Allen Bradley model numbers are provided in the following sections. The required I/O modules shall be provided by Parkson as part of the modification of the existing PLC described in this

section and 16965.

2.5.1.1 For Communication Between the Biolac Control Panel (BCP) and the Mission RTU unit:

a For DI points, provide control relays inside the BCP for signals that send a status or alarm to the Mission RTU and the BCP.

b For AI signals, provide a splitter for each signal inside the BCP for signals sent to the Mission RTU and the BCP.

c See Section 16965 for a list of alarms, status points, and

JUNE 2026 11389-10 MISCELLANEOUS BIOLAC

SYSTEM IMPROVEMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project analog signals at the Mission RTU.

2.5.1.2 Existing DI Rack 1 Slot 4 a Use spare inputs 11, 14 and 15 for PAR Influent High Level, PAR Side 1 and Side 2 High Level.

2.5.1.3 NEW DI Rack 2 Slot 4 a Provide DI module 1769-IQ16 and install at Rack 2 slot 4.

b Use Inputs 0 through 7 for PAR Mixers Thermal Switch and Seal Fail alarms.

c Use Inputs 8 through 10 for PAR Blowers Fail alarms.

2.5.1.4 NEW DI Rack 2 Slot 5 a Provide DI module 1769-IQ16 and install at Rack 2 slot 5.

b Use Inputs 0 through 15 for Methanol Feed Pump Signal and alarms.

2.5.1.5 NEW DI Rack 2 Slot 6 a Provide DI module 1769-IQ16 and install at Rack 2 slot 6.

b Use Inputs 0 through 3 for Methanol Feed Pump Signal and alarms.

c Use Inputs 4 through 6 for Methanol Tank Signal and alarms.

2.5.1.6 Existing DO Rack 1 Slot 6 a Use spare outputs 11 through 15 for the Methanol Feed Pumps Start/Stop signal.

2.5.1.7 Existing DO Rack 1 Slot 7 a Provide control relays for outputs 8 through 13 and wire to existing DO module.

b Use outputs 7 through 13 for the PAR mixers and blowers Start/Stop signal.

c Use outputs 14 and 15 for the ORP low and high level signals to the new RTU.

2.5.1.8 Existing AI Rack 1 Slot 9 a Provide SPD for inputs 6 and 7.

b Use spare inputs 6 and 7 for PAR influent channel Nitrate and Dissolved Oxygen signals.

JUNE 2026 11389-11 MISCELLANEOUS BIOLAC

SYSTEM IMPROVEMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.5.1.9 Existing AI Rack 1 Slot 10 a Provide SPD for inputs 4 through 7.

b Use spare inputs 4 through 7 for PAR Side 1 and Side 2 Nitrate and ORP signals.

2.5.1.10 NEW AI Rack 2 Slot 3 a Provide AI module 1769-IF8 and install at Rack 2 slot 3.

b Provide SPD for input 0.

c Use input 0 for the Recycle Flow signal.

2.5.1.11 Existing AO Rack 2 Slot 1 a Reuse outputs 6 and 7 for Influent methanol feed pumps 1 and 2 speed.

2.5.1.12 Existing AO Rack 2 Slot 2 a Use spare outputs 6 and 7 for PAR methanol feed pumps 1 and 2 speed.

2.6 BIOLAC TRAINING

2.6.1 The Contractor shall coordinate with Parkson to provide training to the WWTP operators once all upgrades to the Biolac have been completed.

2.6.2 Training shall be provided from a Parkson representative. Parkson shall provide a training program as if the entire treatment process was new and the operator had no experience with the system. The existing operations staff is from the County, and the County was not the operator of the system when it was first constructed/started up. Training topics to be emphasized are as follows. Other training topics shall be covered by Parkson, but these shall

receive special emphasis.

2.6.2.1 Optimum chain swing on diffusers and how to adjust 2.6.2.2 WAS controls and optimum settings 2.6.2.3 Methanol feed rates 2.6.2.4 Biolac control panel programming and navigation of the HMI 2.6.2.5 WAS/RAS rates 2.6.2.6 Diffuser maintenance and signs of diffusers that need maintenance 2.6.2.7 Wave-Ox Mode Control Strategy and Other Blower Control Strategies

3.0 EXECUTION

3.1 INSTALLATION

3.1.1 It is the intent of these specifications that the Biolac diffusers be installed

JUNE 2026 11389-12 MISCELLANEOUS BIOLAC

SYSTEM IMPROVEMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project complete and ready for operation in accordance with the specifications and Contract Drawings. Install all equipment in accordance with the manufacturer's instructions. Refer to the sequence of construction in Section 01000 for the timing of the diffuser replacement as it relates to other Work in this project.

3.2 CHAIN MOVEMENT ADJUSTMENT

3.2.1 This step should be performed under the supervision of Parkson's Field Service Engineer at start-up.

3.2.2 Adjust the restraining chain on each aeration chain an equal amount.

Continue this until aeration chains move to within 3' of one another at their closest point.

3.2.3 Once adjustments are completed, adjust the lengths of the aeration chain hose at the air header attachment. Trim hose as necessary to allow a smooth radius into basin without kinking the hose or contacting the basin slope.

END OF SECTION

JUNE 2026 11389-13 MISCELLANEOUS BIOLAC

SYSTEM IMPROVEMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 13006

BAFFLE WALLS

1.0 GENERAL

1.1 DESCRIPTION OF WORK

1.1.1 The scope of this specification shall include labor and materials for the bolted fiberglass reinforced plastic (FRP) Baffle Wall System, which may include but not be limited to:

1.1.1.1 FRP baffle wall panels 1.1.1.2 FRP Angles 1.1.1.3 Fasteners and connections

1.2 QUALITY ASSURANCE

1.2.1 Contractor shall be responsible for verifying all field dimensions for development and approval of the manufacturer’s drawings.

1.2.2 Contractor shall review and confirm in writing the approval of the manufacturer’s drawings.

1.2.3 For coordination and compatibility of parts, a single manufacturer shall provide all baffle system materials excluding any associated concrete items.

1.2.4 Manufacturer of baffle wall system shall have full responsibility for products and design. Split responsibility of materials or design is not acceptable.

1.3 PRODUCT SUBSTITUTIONS

1.3.1 Substitutions shall be performed in accordance with the General Conditions

1.4 PERFORMANCE TESTING

1.4.1 Materials shall comply with Federal and Local laws or ordinances, applicable codes, standards, regulations, and/or regulatory agency requirements including:

1.4.1.1 ASTM D 638, Standard Test Method for Tensile Properties of Plastics 1.4.1.2 ASTM D 790, Standard Test Method for Flexural Properties of Plastics 1.4.1.3 ASTM D 570, Standard Test Method for Water Absorption of Materials 1.4.1.4 ASTM D 256, Standard Test Method for Izod Impact (Notched) 1.4.2 Baffle wall panels and structural components shall meet the performance and design criteria listed herein and conditions indicated on the drawings.

Individual units shall demonstrate compliance with design criteria by fullscale testing:

1.4.2.1 FRP Deck Panels: Large-Scale Uniform Load and Deflection Test

JUNE 2026 13006-1 BAFFLE WALLS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 1.4.2.2 FRP Structural Components: 3 Point Load Bending Test

1.5 DESIGN CRITERIA

1.5.1 Design Load: The load for design shall be the greater of water differential or wind load but not a combination of the two.

1.5.1.1 Water Differential: 11 In. (Considered as a uniform load over the entire wall) 1.5.2 Deflection Limits and Factors of Safety 1.5.2.1 Baffle Panels: L/D = 90 (not to exceed 2.75”); Factor of Safety = 2.0

1.6 SUBMITTALS

1.6.1 Submittals shall be in accordance with Specification Section 01300.

Submittals shall include, but not be limited to:

1.6.1.1 Drawings including layouts, connection and framing details, fastener types and spacing, product description, and installation guidelines.

1.6.1.2 Material certifications.

1.7 O&M MANUALS

1.7.1 Provide O&M manuals in accordance with Section 01300.

2.0 PRODUCTS

2.1 MANUFACTURER(S)

2.1.1 The standard for design, characteristics, and performance is the H-Series structural baffle and partition wall as manufactured by Enduro Composites, 16602 Central Green Blvd., Houston, TX 77032, 713-358-4000, www.endurocomposites.com, or equal.

2.2 MATERIALS

2.2.1 FRP structural materials shall exhibit these minimum physical properties:

2.2.1.1 Tensile Strength: 48,000 psi – ASTM D 638 2.2.1.2 Flexural Strength: 58,000 psi – ASTM D 790 2.2.1.3 Flexural Modulus: 3,220,000 psi – ASTM D 790 2.2.1.4 Izod Impact (Notched): 25 – ASTM D 256 2.2.1.5 Water Absorption: 0.20% maximum – ASTM D 570 2.2.2 FRP Baffle Panels 2.2.2.1 FRP baffle panels shall be ribbed profile in 2.75” depth x 24” height coverage (full panel dimension).

2.2.2.2 FRP baffle panels shall be minimum of 1/4” (.25 inch) thick.

JUNE 2026 13006-2 BAFFLE WALLS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.2.2.3 FRP baffle panels shall have (top) horizontal ribs that slope downward not less than 10 degrees to minimize sediment buildup.

2.2.2.4 FRP baffle panels shall comply with the structural requirements in Section 1.5 Design Criteria.

2.2.2.5 FRP material shall include glass fiber reinforcements 50% (minimum) of the material weight embedded within UV Stabilized Polyester Resin. Color shall be standard gray.

2.2.2.6 FRP material shall have a surfacing veil on both top and bottom sides.

2.2.2.7 Factory cut edges and drilled holes shall be sealed with ANSI/NSF approved material.

2.2.3 FRP Structural Framing/Angles 2.2.3.1 FRP framing shall comply with the structural requirements in

Section 1.5 Design Criteria.

2.2.3.2 FRP angles shall be minimum of 3/8” (.375 inch) thickness and 90 degrees.

a Contractor shall field attach FRP angles to concrete structure or steel walls.

2.2.3.3 FRP material shall include glass fiber reinforcements 50% (minimum) of the material weight embedded within UV Stabilized Polyester Resin. Color shall be standard gray.

2.2.3.4 FRP material shall have surfacing veil on both top and bottom sides.

2.2.3.5 Factory cut edges and drilled holes shall be sealed with approved material.

2.2.4 Hardware 2.2.4.1 Fasteners, anchorage, and other hardware shall be 316 Stainless Steel.

2.2.4.2 All submerged anchors shall be epoxy adhesive type (size as required).

3.0 EXECUTION

3.1 MATERIAL HANDLING

3.1.1 At the time of delivery, all materials shall be inspected for shipping damage.

The freight company and the Manufacturer should be notified immediately of any damage or quantity shortages.

3.1.2 The Contractor shall protect FRP materials from cuts, scratches, gouges, abrasions, and impacts. When lifting crated FRP materials, spreader bars

JUNE 2026 13006-3 BAFFLE WALLS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project shall be used (not wire slings unless materials are fully protected). FRP components shall not be dragged across one another unless separated by a non-scratching spacer.

3.2 INSTALLATION

3.2.1 Before placing and attaching components, the Contractor must confirm the alignment and location of surfaces, brackets, saddles, etc. All bearing surfaces must be level, flat, clean and free of debris.

3.2.2 Erection shall proceed according to sequence shown on the approved specifications/drawings.

3.2.3 Contractor shall install pads, curbs, or piers to modify uneven or sloped concrete surfaces to create a flat, level surface for baffle system attachment.

3.2.4 Contractor shall field cut materials as required and shown on the Manufacturer’s drawings.

3.2.5 Contractor shall seal field cut edges with approved material.

3.2.6 Contractor shall install beams and connections as shown on the approved layout drawings. Field modifications (cuts, copes, holes, etc.), unless shown on the drawings, are not allowed without the manufacturer’s written approval.

Shim FRP beams with approved materials only.

3.2.7 Before placement of baffle panels, the Contractor shall check alignment and location of FRP framing members and existing structure. Baffle panels shall be nested at side-lap conditions.

3.2.8 Contractor shall adjust FRP baffle panels for proper bearing and alignment.

The first panel installed at the bottom of the wall must have the side with a flat end (not an upturn) at the bottom.

3.2.9 Contractor shall drill holes for fasteners through baffle panel and support beam.

3.2.10 Contractor shall fasten baffle panels to structural supports as shown on the approved layout drawings. Unless noted otherwise, FRP baffle panels shall be attached at every low rib with a nut and bolt assembly. At panel side laps, fastening shall be through two panels. Refer to manufacturer’s installation instructions and drawings for proper fastener selection and procedure.

3.2.11 Contractor shall seal field-drilled holes with approved material.

3.2.12 Contractor shall place and fasten other miscellaneous components or hardware as shown on the approved drawings.

END OF SECTION

JUNE 2026 13006-4 BAFFLE WALLS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 13300

METERING AND INSTRUMENTATION

1.0 GENERAL

1.1 DESCRIPTION

1.1.1 Metering and instrumentation equipment described in this section includes, but is not necessarily limited to:

1.1.1.1 ORP Sensors 1.1.1.2 Dissolved Oxygen Probe 1.1.1.3 Nitrate Sensors 1.1.1.4 Digital Controller 1.1.1.5 Level Switch – Float Type 1.1.1.6 Pressure Switches 1.1.1.7 High Output Air Blast 1.1.1.8 Chart Recorder 1.1.2 The instrumentation diagrams, where shown on the drawings, are for purpose of guidance and to show functional features only. They do not necessarily contain or show all components required to accomplish the

desired results or all components required to interface equipment. All necessary parts, equipment, devices, etc., necessary to meet the functional and interface requirements shall be provided.

1.1.3 All instruments shall return to accurate measurement upon restoration of power after a power failure or when transferred to standby power supply.

1.1.4 Alarms on instruments shall be front set and adjustable.

1.1.5 All components furnished under this item shall be tagged with the item number and nomenclature given in this specification.

1.2 QUALITY ASSURANCE

1.2.1 Responsibility & Coordination 1.2.1.1 It shall be the responsibility of the Contractor to furnish a complete and fully operating system. The Contractor shall be responsible for all details which may be necessary to properly install, adjust and place in operation the complete installation.

The Contractor shall assume full responsibility for additional costs which may result from unauthorized deviations from the specifications.

1.3 ADDITIONAL REQUIREMENTS

1.3.1 All chart boxes and fiber tip pens shall be packaged as a separate item. All devices with indicating scales shall be provided with direct reading scales.

MAY 2026 13300-1 METERING AND

INSTRUMENTATION

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

1.4 MANUFACTURERS GUARANTEE

1.4.1 The Contractor shall guarantee that the materials and or workmanship of the equipment be free from defects for a period of one (1) year from date of substantial completion, providing the equipment has been operated and maintained in accordance with the manufacturer's recommendations.

1.5 SUBMITTALS

1.5.1 Shop drawings shall be submitted in accordance with Section 01300 and 16900.

1.5.2 Submit certified dimensional drawings and catalog cuts for each size and type of instrument specified herein. Catalog cuts are to be highlighted to define specific materials of construction and features specified herein. Show tag number of each applicable instrument.

1.5.3 Submit instruction bulletins for each type of instrument specified herein.

Show tag number for each applicable instrument. The instruction bulletin shall include installation instructions, wiring diagrams, power requirements, maintenance instructions, and any other details of a specialized nature to the instruments furnished.

1.5.4 The equipment supplier shall furnish the Owner with approved O & M manuals prepared in accordance with Section 01300 and 01700.

1.6 PRODUCT HANDLING

1.6.1 Protection 1.6.1.1 The Contractor shall use all means necessary to protect the components of this Section before, during, and after installation and to protect the installed work and materials of all other trades.

1.6.2 Replacements 1.6.2.1 In the event of damage, the Contractor shall immediately make all repairs and replacements necessary to the approval of the Engineer and at no cost to the Owner.

2.0 PRODUCTS

2.1 DIFFERENTIAL pH AND ORP SENSOR 2.1.1 The pH/ORP sensor shall be a probe or sensor that uses a differential electrode measurement technique using three electrodes.

2.1.1.1 Two electrodes compare the process value to a stable internal reference standard buffer solution.

2.1.1.2 The internal electrode has non-flowing, foul-resistant characteristics.

2.1.2 The measurement range shall be -1,500 to 1,500 mV with a sensitivity of less than 0.5 mV and a stability of 2 mV per 24 hours, non-cumulative.

MAY 2026 13300-2 METERING AND

INSTRUMENTATION

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.1.3 The sensor shall be the Hach Model GLI DRDXP-series PVDF pHD™ Differential ORP Sensor, as manufactured by Hach Company, or equal. See

section 3.3

for more information on the manufacturers services requirements. It shall consist of the following:

2.1.3.1 Three electrodes:

a Platinum process electrode for measuring pH.

b Glass reference electrode for measuring pH.

c Titanium ground electrode for comparing with process and reference electrodes.

2.1.3.2 A preamplifier, temperature element, PVDF junction and Santoprene® seals on a replaceable salt bridge.

2.1.3.3 Integral 10-meter cable terminated with stripped and tinned wires.

2.1.3.4 Salt bridge with matching material with PVDF junction, glass and platinum process electrode, and a titanium ground electrode.

2.1.4 Provide air/water blast cleaning washer head accessory for each ORP sensor for connection to the air blast cleaning system.

2.1.5 Two (2) sensors shall be provided in the PAR, one (1) on each side.

2.2 DISSOLVED OXYGEN PROBE

2.2.1 The DO probe shall be a submersible probe with stainless steel body, CPVC ends, replaceable sensor cap, and integral cable.

2.2.2 The probe shall be entirely corrosion-resistant and fully immersible.

2.2.3 The probe shall utilize a 1” NPT external thread for mounting hardware connections.

2.2.4 The probe shall not require sample conditioning or electrolyte solutions.

2.2.5 The probe shall interface with the controller via MODBUS®.

2.2.6 The probe shall be factory calibrated and therefore, shall not require calibration or polarization prior to use.

2.2.7 The sensor shall be the Hach LDO™ Dissolved Oxygen Probe, Model 2, as manufactured by Hach Company, or equal. See section 3.3 for more information on the manufacturers services requirements.

2.2.8 Two (2) sensors shall be provided, one (1) sensor shall be provided in the influent chamber to the PAR, and one (1) sensor shall be provided to replace the existing DO probe in the Biolac effluent box. Please see specification

section 11389.

2.3 NITRATE SENSOR

2.3.1 The nitrate sensor shall be a continuous-reading sensor that utilizes a two-

MAY 2026 13300-3 METERING AND

INSTRUMENTATION

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project beam ultra-violet absorption technology with a 2-channel beam path.

2.3.2 The measurement range shall be 0.1 to 90 mg/L NO -N 3 2.3.3 The accuracy range shall be ± 5% of the measured value ± 0.1 mg/L NO -N 3 2.3.4 The measurement interval shall be user-selectable from 15 seconds to 30 minutes with the ability to average up to 12 signals.

2.3.5 The sensor shall compensate for the interface effects of turbidity.

2.3.6 The sensor shall provide reagent-free operation without the requirements of sample conditioning.

2.3.7 The sensor shall be self-cleaning via a wiper and retain a life-long factory calibration.

2.3.8 The sensor shall be the NT3100sc UV Nitrate Sensor, 2 mm path length, as manufactured by Hach Company, or equal. See section 3.3 for more information on the manufacturers services requirements.

2.3.9 Three (3) sensors shall be provided, one (1) in the influent channel to the PAR, and two (2) in the re-aeration zone of the PAR, one (1) on each side.

2.4 DIGITAL CONTROLLER

2.4.1 The controller shall be a microprocessor-based sensor controller with modules for connection of analog sensors for pH, ORP, nitrate, or dissolved oxygen.

2.4.2 The controller housing shall be a polycarbonate, aluminum (powder coated), and stainless steel metal enclosure with a corrosion-resistant finish.

2.4.3 The controller shall use 4-20 mA communication.

2.4.4 The controller shall be Type 4X NEMA 4X rated.

2.4.5 The controller shall use a menu-driven operation system with two security levels and a real-time clock.

2.4.6 The controller shall be equipped with a USB reader for data download and controller software upload.

2.4.7 Each controller shall be equipped with a UV protection screen with sunroof.

Contractor to provide the hardware required to mount the protection screen with sunroof to the SC4500 controller.

2.4.8 The controller shall be AC powered with 100–240 VAC ±10%, 50/60 Hz, and 1 A (28 W sensor load) 2.4.9 High voltage:

2.4.9.1 Two relays (SPDT).

2.4.9.2 Wire gauge shall be 0.75 to 1.5 mm2 (18 to 16 AWG) 2.4.9.3 AC controller

MAY 2026 13300-4 METERING AND

INSTRUMENTATION

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project a Maximum switching voltage: 100–240 VAC b Maximum switching current: 5 A Resistive/1 A Pilot Duty c Maximum switching power: 1200 VA Resistive/360 VA Pilot Duty 2.4.10 The controller shall be equipped with the following forms of communication:

2.4.10.1 Modbus TCP/IP 2.4.11 Five analogs 0/4-20 mA outputs shall be provided with a maximum impedance of 500 ohms.

2.4.12 The following shall be able to be programmed:

2.4.12.1 Alarms:

a High and Low alarm point b High and Low alarm point deadband c On and Off delay 2.4.12.2 Controls a Linear b PID 2.4.13 All user settings of the controller shall be retained for 10 years in flash memory.

2.4.14 The controller shall be equipped with a system check for:

2.4.14.1 Motherboard temperature 2.4.14.2 Field auto-test 2.4.15 The controller shall be the SC4500 Controller, as manufactured by Hach Company, or equal. See section 3.3 for more information on the manufacturers services requirements.

2.4.16 Three (3) digital controllers shall be provided as follows:

2.4.16.1 One (1) for the PAR influent channel connecting the DO probe and nitrate sensor in the influent channel.

2.4.16.2 Two (2) in the PAR tank, one on each side, connecting the ORP probe and nitrate sensor on their respective sides of the PAR.

Each of these shall also control when the air blast unit for the ORP probe operates.

2.4.16.3 Refer to the contract drawings for the locations of the SC4500 and instrumentation.

2.5 LEVEL SWITCH – FLOAT TYPE

MAY 2026 13300-5 METERING AND

INSTRUMENTATION

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.5.1 Float (ball) shall be leakproof, shockproof, corrosion resistant and constructed of type 316 stainless steel. Float shall have continuously welded seams.

2.5.2 Switch assembly shall be a tilt type sensor which shall be non-floating displacement type with less than 1-inch differential. Switch assembly shall be permanently encapsulated in plastic cartridge (glass shall not be acceptable). Switch contacts shall be rated a minimum of 20 amperes at 115 VAC. Switch shall be a single pole, single throw type. Furnish normally closed contacts. The float body shall be grounded by the green insulated

conductor of the cable supporting the float switch.

2.5.3 Cable shall be provided with the sensor and shall be PVC insulated, oil resistant suitable for use in raw wastewater applications. Cable shall be sealed at sensor utilizing a flexible boot and compression type lock seal.

Cables shall be a 3-wire cable provided with a minimum size conductor of No. 14 AWG with green grounding conductor. Float switch cable length shall be furnished with continuous length to mount float switches in the PAR influent channel and on each side of the PAR, plus an additional 5 feet of cable for slack, and enough length to connect float cable to feeders. Excess cable shall be coiled and tie wrapped to mounting supports.

2.5.4 Manufacturer:

Float switches shall be Model 9G (non-mercury type switch) Direct Acting Float Switches with cables and weights, as manufactured by Consolidated Electric Company, or equal.

2.5.5 Installation:

Provide a 316SS wall bracket for suspended installation of the floats. Install floats where shown on the Drawings.

Contractor responsible for determining the appropriate float cable length.

2.6 PRESSURE SWITCHES

2.6.1 The pressure-sensing element shall be a diaphragm as specified herein. The sensing element shall activate a snap acting switch. The switch connection shall be clearly and permanently marked. The assembly shall be provided with an indicating scale to show the trip setting of each switch.

2.6.2 Provide switch in NEMA 7/9 housing in hazardous locations.

2.6.3 Manufacturer:

2.6.3.1 Ashcroft 2.6.3.2 United Electric Controls Co.

2.6.3.3 Mercoid Corp 2.6.3.4 Or equal

MAY 2026 13300-6 METERING AND

INSTRUMENTATION

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

2.7 HIGH OUTPUT AIR BLAST

2.7.1 A high output air blast (HOAB) shall be provided for each ORP Sensor to ensure the surface of the measuring part of the ORP sensor remains clean.

2.7.2 The HOAB shall have an air pressure of 45 psi and an air flow of 2.1 m3/hour at 115 VAC.

2.7.3 The HOAB shall consist of a non-metallic cabinet (enclosure), including a compressor, which shall be installed near the ORP probe equipped with a cleaning head at the PAR. HOAB shall be provided with approx. 27 ft of air hose suitable for outdoor use. Air hose shall connect HOAB to the cleaning head at the ORP sensor.

2.7.4 The enclosure shall be made of polycarbonate and be suitable for outdoor installation.

2.7.5 The HOAB shall be the High Output Airblast Cleaning System as manufactured by Hach Company, or equal.

2.7.6 Two (2) HOAB shall be provided at each ORP Sensor (one (1) on each side of the PAR).

2.8 CHART RECORDER

2.8.1 The chart recorder shall be manufactured by Honeywell, Model DR 45AW Truline, or equal, with options as indicated as follows:

2.8.1.1 GENERAL

a Service Recycle Flow b Quality 1 c Tag No. FIT-006

2.8.1.2 INSTRUMENT

a Location Control Building b Mounting Wall Mounted c Scale Configurable d Channels 2 e Input 4-20 mA d-c f Input From Transmitter g Auxiliary Output: (1) 4-20 mA d-c h Accuracy +/-0.1% i Enclosure Class NEMA 12/NEMA 4X j Power 120 VAC, 60 Hz k Integrator (Totalizer) Yes, Microprocessor Based

MAY 2026 13300-7 METERING AND

INSTRUMENTATION

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project l Flow Range 0-2000 GPM

2.9 MOUNTING ASSEMBLIES FOR ALL INSTRUMENTS

2.9.1 Differential pH and ORP Sensor 2.9.1.1 The Hach pHD-SC pH Sensor shall be immersion mounted via the handrail surrounding the PAR. The mounting rail (1.5” x 7.5’ pipe) shall be made of CPVC.

2.9.1.2 Contractor to supply Stainless steel bracket and U-bolt, CPVC swivel and clamp, CPVC probe mounting adapter, CPVC mounting support, and any other accessories required for proper mounting per the manufacturer.

2.9.2 LDO Probe 2.9.2.1 The Hach LDO™ Dissolved Oxygen Probe, Model 2 shall be immersion mounted via the handrail surrounding the PAR. The mounting rail (1.5” x 7.5’ pipe) shall be made of CPVC.

2.9.2.2 Contractor to supply Stainless steel bracket and U-bolt, CPVC swivel and clamp, CPVC probe mounting adapter, CPVC mounting support, and any other accessories required for proper mounting per the manufacturer.

2.9.3 Nitrate Sensor 2.9.3.1 The NT3100sc UV Nitrate Sensor shall be pole mounted via the handrail surrounding the PAR.

2.9.3.2 The pole mounting kit shall include a 10 cm bracket. The pole shall be made of stainless steel.

2.9.4 Digital Controller 2.9.4.1 The SC4500 Controller shall be mounted to the handrail mounted backboard per the Contract Drawings. Provide accessories as needed for proper mounting.

2.9.5 High Output Airblast System 2.9.5.1 The High Output Airblast System shall be handrail (pipe) mounted next to the ORP probe per the Contract Drawings.

Provide accessories as needed for proper mounting.

3.0 EXECUTION

3.1 SURFACE CONDITIONS

3.1.1 Inspection 3.1.1.1 Prior to all Work of this Section, the Contractor shall carefully inspect the installed work of all other trades and verify that all such work is complete to the point where this installation may properly commence.

MAY 2026 13300-8 METERING AND

INSTRUMENTATION

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.1.2 Discrepancies 3.1.2.1 In the event of discrepancy, the Contractor shall immediately notify the Engineer.

3.1.2.2 The Contractor shall not proceed with installation in areas of discrepancy until all such discrepancies have been fully resolved.

3.2 INSTALLATION

3.2.1 The Contractor shall install all metering and instrumentation in strict accordance with the manufacturer's recommendations as approved by the Engineer.

3.3 MANUFACTURERS’ SERVICES AND STARTUP

3.3.1 Contractor shall include the services of a qualified, factory-trained service representative who shall inspect the complete equipment installation to ensure that it is installed in accordance with the manufacturer's recommendations, make all adjustments necessary to place the system in trouble-free operation and instruct the operating personnel in the proper care and operation of the equipment furnished. A minimum of one (1) day startup assistance shall be provided per instrument if it is from different vendors.

3.3.2 Contractor shall include a manufacturer’s Service Agreement that covers all the manufacturer’s recommended preventative maintenance, regularly scheduled calibration and any necessary repairs beginning from the time of equipment startup through end user acceptance at Substantial Completion, as well as the first 24 months after Substantial Completion.

3.3.2.1 The WarrantyPlus Partnership (first 12 months of agreement) and Field Service Partnership (second 12 months of agreement) shall be supplied for each piece of Hach instrumentation provided. The partnership shall be provided for the following:

a Differential pH and ORP Sensor (two sensors) b LDO Probe (two sensors) c Nitrate Sensor (three sensors) d Digital Controller (three sensors) e High Output Air Blast (two units) 3.3.3 The requirements of paragraphs 3.3.1 and 3.3.2 are to be performed by the manufacturer’s factory-trained service personnel. Field service and factory repair by personnel not employed by the manufacturer is not allowed.

3.3.4 Use of the manufacturer’s service parts and reagents is required. Third-party parts and reagents are not approved for use.

END OF SECTION

MAY 2026 13300-9 METERING AND

INSTRUMENTATION

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 14620

DAVIT CRANES AND HOISTS

1.0 GENERAL

1.1 DESCRIPTION

1.1.1 The contractor shall supply and install the following:

1.1.1.1 Four (4) portable davit cranes with hand winch operation for the removal of anoxic mixers from the anoxic zones of the Post Anoxic Reactor (PAR). Contractor shall install a total of two (2) wall-mounted bases and two (2) flush-mounted bases. as shown on contract drawings.

1.2 SUBMITTALS

1.2.1 Submit shop drawings of all equipment showing lifting capacity, materials of construction, accessories, mounting hardware, and crane dimensions.

Submittals shall be in accordance with Section 01300.

1.3 GUARENTEES

1.3.1 The Contractor shall guarantee that the equipment furnished, including all accessories and appurtenances is of the correct design, capacity, and construction to operate satisfactorily in the installation and type of service for which it is to be used.

1.3.2 Equipment and installation shall be guaranteed by the Contractor a minimum of 1 year after the date of Substantial Completion.

2.0 PRODUCTS

2.1 PORTABLE DAVIT CRANE – ANOXIC MIXERS

2.1.1 Flush Mount 2.1.1.1 The frame shall have an electrostatic powder coated finish.

2.1.1.2 The boom shall be adjustable with a minimum of two distinct angles from vertical.

2.1.1.3 The frame shall be flush mounted in a stainless steel socket.

Each flush mounted socket base shall be installed as shown on contract drawings. The Contractor shall install the stainless steel sockets in such a manner that installation will not interfere with the reinforcement contained within the basin structure. It shall be possible to remove the frame from the socket when the crane is not in use or when it shall be installed into a different socket.

2.1.1.4 Each crane shall be supplied with 3/16-inch 28 feet long wire rope. Wire rope shall be 304 stainless steel with swivel hook and swaged ball fitting.

2.1.1.5 Each crane shall have powder coated worm gear hand winch.

2.1.1.6 Each crane shall have a capacity of up to 500 lbs at boom

JUNE 2026 14620-1 DAVIT CRANES AND HOISTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project position A and leg position 1 and 600 lbs at boom position B and leg position 2.

2.1.1.7 Each crane shall be provided with one (1) powder coat finished flush mount socket base.

2.1.1.8 The crane shall be Series 5BF5-M1, one (1) crane per mixer for a total of two (2) cranes; two (2) winches, model M1 – M4022PB

– K; two (2) flush mount powder coat bases model 5BF5; and two

(2) wire rope assembly model WS19-28NS, as manufactured by

THERN, INC., or equal.

2.1.2 Wall Mount 2.1.2.1 The frame shall have an electrostatic powder coated finish.

2.1.2.2 The boom shall be adjustable with a minimum of two distinct angles from vertical.

2.1.2.3 The frame shall be wall mounted in a stainless steel socket. Each wall mounted socket base shall be installed as shown on contract drawings. The Contractor shall install the stainless steel sockets in such a manner that installation will not interfere with the reinforcement contained within the basin structure. It shall be possible to remove the frame from the socket when the crane is not in use or when it shall be installed into a different socket.

2.1.2.4 Each crane shall be supplied with 3/16-inch 28 feet long wire rope. Wire rope shall be 304 stainless steel with swivel hook and swaged ball fitting.

2.1.2.5 Each crane shall have powder coated worm gear hand winch.

2.1.2.6 Each crane shall have a capacity of up to 500 lbs at boom position A and leg position 1 and 600 lbs at boom position B and leg position 2.

2.1.2.7 Each crane shall be provided with one (1) powder coat finished wall mount socket base.

2.1.2.8 The crane shall be Series 5BW5-M1, one (1) crane per mixer for a total of two (2) cranes; two (2) winches, model M1 – M4022PB

– K; two (2) wall mount powder coat bases model 5BW5; and two

(2) wire rope assembly model WS19-28NS, as manufactured by

THERN, INC., or equal.

3.0 EXECUTION

3.1 INSTALLATION

3.1.1 The Contractor shall install the portable crane as shown on the Contract Drawings, in strict accordance with the manufacturer’s recommendations as approved by the Engineer.

3.2 WARRANTY

JUNE 2026 14620-2 DAVIT CRANES AND HOISTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.2.1 The crane and hoist supplier shall provide a minimum full two (2) year warranty on all components of the crane/hoist commencing from substantial completion.

END OF SECTION

JUNE 2026 14620-3 DAVIT CRANES AND HOISTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 15060

MECHANICAL PIPING AND ACCESSORIES

1.0 GENERAL

1.1 DESCRIPTION

1.1.1 This section covers all piping, valves and specials as shown on the contract drawings and specified herein. This section covers all piping for raw sewage, treated wastewater and vents inside and within 5 feet of structures. Furnish all materials, tools and equipment, and install complete piping. Materials shall include, but not necessarily limited to all pipe, valves and accessories, fittings, specials, couplings, jointing and gasketing materials, harness

adapters, metal pipe hangers and supports, and miscellaneous other accessories and coatings as specified herein.

1.2 QUALITY ASSURANCE

1.2.1 Piping 1.2.1.1 The finished pipe shall be pressure tested at a pressure of 150 pounds per square inch (psi) for 2 hours. The pipe shall be acceptable if during the two-hour test period the initial pressure of 150 psi does not drop below 145 psi and no visible leaks are observed. Before beginning the pressure test all air must be removed from the test section before pressurizing the pipe. Also,

the pressure in the test section must be allowed to stabilize at 150 psi for at least one half hour before beginning the 2 hour test period. The test shall be conducted until no leaks are visible and pressure does not drop below 145 psi.

1.2.1.2 The requirements of Section 02600 shall apply to mechanical piping when not superseded by Section 15060 paragraph 1.2.1.1.

1.2.2 Air Pipe 1.2.2.1 The completed pipe system shall be tested for leakage. The pipe shall be pressurized to its working pressure 10 psi. The initial pressure shall be maintained within 1 psi without the addition of more air for one hour. During the pressure test all joints shall be tested for leakage by applying a liquid soap film. Any leaks detected by the presence of bubbles shall be repaired. The test

shall be repeated until no leaks are detected, and the pressure does not drop more than 1 psi during the one hour period.

1.2.3 Material Inspection 1.2.3.1 All items furnished by the Contractor under this section shall be inspected by the Engineer before installation. Notify the Engineer three working days before proposed inspection.

1.3 SUBMITTALS

JUNE 2026 15060-1 MECHANICAL PIPING

AND ACCESSORIES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 1.3.1 Furnish complete shop drawings before delivery of any piping material to the job site. Shop drawings shall be prepared in accordance with Section 01300, Submittals, of these Specifications. Pipes and fittings shown bear the same letter or number designation as marked on the pipes and fittings to be delivered to the site.

1.3.2 Material List 1.3.2.1 Accompanying the shop drawings, submit copies of a complete list of all materials proposed to be furnished and installed under this portion of the work.

1.3.3 As-Built Drawings 1.3.3.1 During the progress of the work, maintain an accurate record of the location of the piping with reference to job base lines, grades and elevations. Show all changes made in the piping installation from the layout and materials shown on the approved shop drawings.

1.4 PRODUCT HANDLING

1.4.1 Protection 1.4.1.1 Use all means necessary to protect the materials of this Section before, during and after installation and to protect the installed work and materials of all other trades.

1.4.2 Replacements 1.4.2.1 In the event of damage, immediately make all repairs and replacements necessary to the approval of the Engineer and at no additional cost to the Owner.

2.0 PRODUCTS

2.1 PIPE AND FITTINGS

2.1.1 Steel Pipe 2.1.1.1 All galvanized steel pipe shall meet the requirements of ASTM A53, Grade B, Type E or S. The pipe shall be Schedule 40. All joints shall be threaded.

2.1.1.2 All fittings for galvanized steel pipe shall be standard threaded and meet the requirements of ASTM A234, Grade WPB and ANSI B16.11. The fittings shall be hot dipped galvanized.

2.1.2 PVC Pipe 2.1.2.1 PVC Pipe to shall conform to the following specification:

a All buried PVC piping used to extend potable water to onsite yard hydrants and the emergency shower shall meet the requirements of ASTM D-2241, SDR-21 and

JUNE 2026 15060-2 MECHANICAL PIPING

AND ACCESSORIES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project NSF 61, with a water pressure rating of 200 psi. Fittings shall meet the requirements of ASTM D-2466 and NSF 61, and shall be the solvent weld type.

b All buried pressure PVC piping shall meet the requirements of ASTM D1784, Class 12454-B. Fittings shall meet the requirements of ASTM D-2466 and shall be the solvent weld type.

c All interior PVC piping shall meet the requirements of ASTM D-1785, Schedule 40 and NSF 61. Fittings shall meet the requirements of ASTM D-2466 and NSF 61 and shall be the solvent weld type with unions at all valves and fixtures.

d All PVC chemical feed pipe/conduit shall be ASTM D- 1785 schedule 80. Fittings shall meet the requirements of ASTM D-2464 and shall be threaded.

2.1.3 Ductile Iron Pipe 2.1.3.1 Buried Pipe a Buried ductile iron pipe shall be Class 51 ductile iron meeting the requirements of AWWA C151 unless noted otherwise. The pipe shall be double cement lined per AWWA C104 and coated on the interior and exterior with an asphaltic coating. All buried ductile iron pipe shall have mechanical joints in accordance with AWWA C111.

b All buried fittings shall be ductile iron compact fittings with mechanical joints meeting the requirements of AWWA C153. All fittings shall be double cement lined per AWWA C104 and coated on the interior and exterior with an asphaltic coating.

2.1.3.2 Interior Pipe a All interior ductile iron pipe shall meet the requirements of AWWA C115 with a working pressure of 150 psi. All interior ductile iron pipe shall have flanged joints in conformance with AWWA C115. All interior ductile iron pipe shall be double cement lined and the exterior surface furnished to be compatible with the specified paint system.

b All interior fittings shall be ductile iron fittings meeting the requirements of AWWA C110. The fittings shall have flanged joints. The fittings shall be double cement lined

JUNE 2026 15060-3 MECHANICAL PIPING

AND ACCESSORIES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project and the exterior surface finished to be compatible with the specified paint system.

c All flanged piping and fitting joints shall be made using 1/8 inch thick, Buna-N rubber, full face gaskets with dimensions conforming to the dimensions shown on Table A.1 from Appendix A of AWWA C115.

2.1.4 Stainless Steel Chemical Piping for Methanol 2.1.4.1 Stainless steel chemical feed pipe shall conform to ASTM A312, type 316L.

2.1.4.2 Stainless steel fittings shall be forged, NPT, and conform to ASTM A182.

2.1.4.3 All stainless steel chemical feed pipe and fittings shall be manufactured of Type 316L stainless steel.

2.1.5 Stainless Steel Air Pipe 2.1.5.1 Rolled pipe shall conform to ASTM A778/ANSI B36.19 for pipe greater than 12 inches in diameter.

2.1.5.2 Fittings shall conform to ASTM 774, ANSI B36.19 and ANSI B16.9.

2.1.5.3 Stainless steel pipe fabricated from sheeting shall conform to ASTM A240.

2.1.5.4 Stainless steel fittings shall conform to ANSI B16.9.

2.1.5.5 Stainless steel flanges shall be Welded or Slipring with drilling conforming to ANSI B16.9.

2.1.5.6 All stainless steel welded air pipe shall be manufactured of Type 304L stainless steel.

2.1.6.2 The pipe couplings shall be of a gasketed, sleeve-type, with diameter to properly fit the pipe. Each coupling shall consist of one (1) steel middle ring, 0.154 inches thick and 5 inches in length, two (2) steel followers, two (2) rubber-compounded wedge section gaskets and sufficient track-head stainless steel bolts to properly compress the gaskets. Field joints shall be made with this type of coupling.

2.1.6.3 The middle ring and followers of the coupling shall be true circular sections free from irregularities, flat spots, or surface defects.

JUNE 2026 15060-4 MECHANICAL PIPING

AND ACCESSORIES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project They shall be formed from mill sections with the follower-ring section of such design as to provide confinement of the gasket.

After welding, they shall be tested and cold expanded a minimum of 1% beyond the yield point.

All bolt holes in the followers shall be oval for greater strength.

2.1.6.5 The gaskets of the coupling shall be composed of a crude or synthetic rubber base compounded with other products to produce material which will not deteriorate from age, from heat, or exposure to air under normal storage conditions. It shall also possess the quality of resilience and ability to resist cold flow of the material so that the joint will remain sealed and tight indefinitely when subjected to shock, vibration, pulsation and

temperature, or other adjustments of the pipe line.

2.1.6.6 The couplings shall be assembled on the job in a manner to insure permanently tight joints under all reasonable conditions of expansion, contraction, shifting and settlement, unavoidable variations in trench gradient, etc. The coupling shall be Dresser, Style 38, as manufactured by Dresser Manufacturing Division, Bradford, Pennsylvania, or equal.

2.2 CLEANOUT/FLUSHING CONNECTION ADAPTOR AND CAP

2.2.1 6-inch Type D SS female cam operated coupler to female NPT thread, Model 360DSS by EVER-TITE, or equal.

2.2.2 6” SS dust plug, Model 360DPSS by EVER-TITE, or equal.

2.2.3 12" brass chain shall be supplied and connected to the SS dust plug.

2.3 PIPE INSULATION – FOR PIPES 8” DIAMETER AND LESS

2.3.1 The Contractor shall provide and install the pipe insulation as described herein and shown on the Contract Drawings.

2.3.2 The insulation shall be a closed cell, flexible elastomeric foam insulation that is factory-adhered to a multi-ply laminate jacketing (PVC backing and aluminum foil coated with a white protective polyester film).

2.3.3 Factory-molded insulation fittings and PVC covers shall be used for pipe fittings. Where factory-molded fittings are not available from the manufacturer, the Contractor shall field fabricate special insulation fittings and PVC covers in a professional manner.

2.3.4 The insulation shall be a minimum two inches thick.

2.3.5 K-Flex 120 Adhesive and white stainless steel tacks shall be used on all factory-fabricated fittings.

JUNE 2026 15060-5 MECHANICAL PIPING

AND ACCESSORIES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.3.6 K-Flex Rivets and K-Flex Clad WT Tape, or equal, shall be used and applied at all seams. An approved contact adhesive shall be used at all butt-joints, termination points, and open ends.

2.3.7 Insulation system to be installed over heat trace.

2.3.8 The insulation system shall be K-Flex Clad WT as manufactured by K-Flex USA, or equal.

2.4 PIPE INSULATION – FOR PIPES LARGER THAN 8” DIAMETER

2.4.1 Provide 2” of Polyiso insulation, Trymer 2000XP or equal on all pipe and fittings.

2.4.2 Cover insulation with vapor retarder and PVC jacket, 0.030” thick. Proto fitting covers, or equal.

2.4.3 Follow manufacturer recommendation for installation of all components.

2.5 VALVE BOXES

2.5.1 Use service boxes cast iron, extension type of the required length, with screw adjustment.

2.5.3 Valve boxes shall be Series 6855 Slip Type as manufactured by Tyler Union, or equal. See QAC Standard Detail for Water and Sewer Valve Box and Cover.

2.6 PLUG VALVES (MANUALLY OPERATED)

2.6.1 All 14” plug valves shall be of the non-lubricated, 100% port, eccentric type with resilient faced plugs. Plug valves shall be designed for a working pressure of 150 psi. Valves shall be capable of providing drip tight shut-off up to the full pressure rating with the pressure in either direction. Plug valves shall be performance, leakage, and hydrostatic tested in accordance with AWWA C504. The leakage test shall be applied to the face of the plug

tending to unseat the valve. Certified copies of reports covering proof of design testing as described in AWWA C504 shall be available upon request.

2.6.2 All buried plug valves shall be furnished with mechanical joint ends meeting AWWA C111.

2.6.3 Valve bodies shall be cast iron, ASTM A126 Class B. All exposed nuts, bolts, springs, washers, etc. shall be stainless steel. Resilient plug facings shall be NBR. The valve shall be furnished with replaceable permanently lubricated sleeve type stainless steel bearings in both the upper and lower journals.

2.6.4 Operating nut shall terminate approximately 6 inches below the top of the valve box. Two tee handle wrenches shall be provided for valves with nuts.

All valves shall open counterclockwise.

JUNE 2026 15060-6 MECHANICAL PIPING

AND ACCESSORIES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.6.5 The plug valves shall be Dezurik PEF 100% Port Eccentric Plug Valve, or equal.

2.7 PIPE-TO-WALL PENETRATION SEAL AND SLEEVE

2.7.1 The pipe-to-wall penetration seal shall be modular mechanical type, consisting of interlocking synthetic rubber links shaped to continuously fill the annular space between the pipe and wall opening.

2.7.1.1 Links shall be loosely assembled with 316 SS bolts to form a continuous rubber belt around the pipe with a reinforced nylon pressure plate under each bolt head and nut. After the seal assembly is positioned in the sleeve, tightening of the bolts shall cause the rubber sealing element (nitrile) to expand and provide an absolute water-tight seal between the pipe and wall opening.

The seal shall be constructed so as to provide electrical insulation between the pipe and the wall, thus reducing chances of cathodic reaction between these two members.

2.7.1.2 The Contractor shall determine the required inside diameter of each individual wall opening or sleeve before ordering, fabrication or installing. The inside diameter of each wall opening shall be sized as recommended by the manufacturer to fit the pipe and seal to assure a watertight joint.

2.7.1.3 The pipe sleeve, if necessary, shall be a molded non-metallic high-density polyethylene sleeve. CS sleeves shall have integrally formed hollow water stop sized having a minimum of four inches larger than the outside diameter of the sleeve itself and allowing 1/2” movement between wall forms to resist pour forces. Each sleeve assembly shall have end caps manufactured of the same material as the sleeve itself and installed at each end

of the sleeve so as to prevent deformation during the initial concrete pour, and to facilitate attaching the sleeve to the wall forms. End caps shall remain in place to protect the opening from residual debris and rodent entry prior to pipe insertion.

2.7.1.4 2.7.1.5 Seals and sleeves shall be Link-Seal, Model OS-316, as manufactured by Thunderline/LinkSeal Corporation, or equal.

2.8 WALL PIPE

2.8.1 Wall pipe shall be provided with a plain end on the exterior of the wall and with a flanged joint inside the wall. The wall pipe shall be installed flush with the wall except on curved walls. The mechanical joint bell and flange shall be tapped for studs when set flush with the wall. The pipe shall be constructed of cast iron with a welded wall collar at the center of the wall pipe

JUNE 2026 15060-7 MECHANICAL PIPING

AND ACCESSORIES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project to minimize joint leakage. The wall pipe shall be placed in position before the wall is poured, and the pipe can be connected when the concrete is cured.

2.9 PIPE SUPPORTS

2.9.1 Pipe supports shall be installed as it is located on Contract Drawings.

Additionally, supports shall be provided and installed in accordance with Contract Drawing details.

2.10 SLEEVES

2.10.1 Sleeves shall be provided around pipes through walls, floors, ceilings, partitions, structure members or other building parts as shown on the contract drawings.. Sleeves shall be standard weight galvanized iron pipe two sizes larger than the pipe or insulation so that pipe or insulation shall pass through masonry or concrete walls or floors. Provide 20 gauge galvanized steel sheet or galvanized pipe sleeves for all piping passing

through frame walls.

2.10.2 Sleeves through floors shall be flush with the floor except for sleeves passing through Equipment Rooms which shall extend 3/4" above the floor. Space between the pipe and sleeve shall be caulked. Escutcheon plates shall be constructed to conceal the ends of sleeves. Each trade shall be responsible for drilling existing floors and walls for necessary sleeve holes.

2.10.3 Sleeves through walls and floors shall be sealed with a waterproof epoxy caulking compound.

2.10.4 Copper piping passing through galvanized sleeves shall be insulated through sleeve length and 3 inches each side.

2.11 REDUCED PRESSURE ZONE BACKFLOW PREVENTER

2.11.1 A reduced pressure zone (RPZ) backflow preventer shall be installed on each potable water pipe serving the methanol feed station to prevent backflow due to back siphonage and/or backpressure.

2.11.2 The RPZ backflow preventer shall consist of an internal pressure differential relief valve located between two positive seating check modules with captured springs and silicone seat discs.

2.11.3 Seats and seat discs shall be replaceable in both check modules and the relief valve. There shall be no threads or screws in the waterway exposed to line fluids.

2.11.4 Service of all internal components shall be through a single access cover secured with stainless steel bolts.

2.11.5 Body and shutoffs shall be constructed using lead free cast copper silicon alloy materials.

2.11.6 The RPZ backflow preventer shall also include two resilient seated isolation valves, four resilient seated test cocks, and an air gap drain fitting.

JUNE 2026 15060-8 MECHANICAL PIPING

AND ACCESSORIES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.11.7 The valve body shall utilize a coating system with built in electrochemical corrosion inhibitor and microbial inhibitor.

2.11.8 The RPZ backflow preventer shall meet the requirements of: USC; ASSE Std.1013; AWWA Std. C511; CSA B64.4.

2.11.9 The RPZ backflow preventer shall be a Watts Series LF009, or equal.

2.12 DETONATION FLAME ARRESTER

2.12.1 A 2” detonation flame arrestor shall be provided on the methanol suction line, as shown in the Contract Drawings.

2.12.2 The flame arrestor shall have 316 stainless steel components and shall be NEC rated for Group C and Group D flammable gases and vapors.

2.12.3 The flame arrestor shall have raised faced flanged connections, designed with an ANSI 150 lb pressure rating.

2.12.4 The flame arrestor shall be the model 94313 Detonation Flame Arrestor, as manufactured by Shand & Jurs, or equal.

2.13 ANALOG PRESSURE GAUGE

2.13.1 Provide a pressure gauge, isolation valve, pressure snubber, and associated fittings for each methanol feed pump, as shown on the Contract Drawings.

2.13.2 Fittings 2.13.2.1 Quick Connect Stems: Shall be Type 316 stainless steel, full flow type, Y2-inch female NPT stem with protector cap, Swagelok "QF" series or equal. Quick connect stems shall be fully compatible with the quick connect body furnished with the pressure gauges. Both stem and body shall be of the same manufacturer.

2.13.2.2 Ball Valves: Shall be Type 316 stainless steel body, stem and ball with Teflon seat and packing, spring return handle to the fully closed position, Marpac, PBM, Flow-Tek or equal.

2.13.2.3 Pressure Snubber: Shall be 316 stainless steel, 1/4” male/female NPT, model A-260 by Dwyer Instruments, LLC, or equal.

2.13.2.4 Provide all miscellaneous fittings necessary to transition from the 1/4” 316 S.S. pipe at the Methanol feed pumps to the pressure gauge and associated isolation valve/quick disconnect fittings.

2.13.3 The pressure gauge shall be a 2 and 1/2-inch diameter gauge with a range of 0 to 60, graduated in 2-pound increments with bottom connection, white face with black case and divisions. The gauge shall be manufactured by Ashcroft, or equal.

3.0 EXECUTION

3.1 SURFACE CONDITIONS

JUNE 2026 15060-9 MECHANICAL PIPING

AND ACCESSORIES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.1.1 Inspection 3.1.1.1 Prior to all work of this Section, carefully inspect the installed work of all other trades and verify that all such work is complete to the point where this installation may properly commence.

3.1.1.2 Verify that all piping may be installed in accordance with all pertinent codes and regulations, the original design, and the referenced standards.

3.1.2 Discrepancies 3.1.2.1 In the event of discrepancy, immediately notify the Engineer.

3.1.2.2 Do not proceed with installation in areas of discrepancy until all such discrepancies have been fully resolved.

3.2 INSTALLATION

3.2.1 All pipes and fittings shall be laid according to the lines and grades shown on the plans or as required. All piping shall be adequately supported, anchored and secured by approved piers, hangers and ties.

3.2.2 Special care shall be exercised at the outside face of structures to support piping bridging the excavation for such structures. The pipe shall be supported.

3.2.3 All pipe and castings shall be thoroughly cleaned before being lowered into the trench. The exposed ends of all uncompleted lines shall be closed with tight wooden plugs adequately secured at all times when pipe laying is not actually in progress.

3.2.4 Metal Piping 3.2.4.1 Jointing with mechanical couplings shall conform to Manufacturer's recommendations. All bolts shall be tightened in such a manner as to preserve true alignment and shall uniformly distribute the stress in the bolts. Bolt tightening shall be accomplished with torque wrenches.

3.2.4.2 Bell and spigot rubber ring joints shall be assembled in strict accordance with the manufacturer's recommendations. Bell and spigot shall be thoroughly cleaned before assembly.

3.2.4.3 Mechanical joints shall be made in strict accordance with the manufacturer's recommendations, using proper bolt torque and gaskets lubricates. All parts shall be thoroughly cleaned before assembly.

3.2.4.4 Threaded joints shall be made in strict accordance with the manufacturer's recommendations, using proper bolt torque and gaskets lubricates. All parts shall be thoroughly cleaned before assembly.

JUNE 2026 15060-10 MECHANICAL PIPING

AND ACCESSORIES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.2.4.5 Flanged joints shall have 1/16-inch thick gaskets up to 8-inch diameter piping and for larger sizes, gasket thickness shall be 3/32 inches. The gaskets shall be of best quality one-piece cloth inserted sheet rubber. Flanges shall be firmly bolted with the machine and shall be so tightened as to uniformly distribute the stress in the bolts. The bolt length shall be such that projection

beyond the nut shall not be more than 1/4 inch. No washers shall be used.

3.2.4.6 Where required for proper location of materials, valves fittings, or other castings, pipe or fittings shall be cut with approved pipe cutter. Cutting shall be carefully done by experienced men, in such a manner as to leave a smooth end normal to the axis of the pipe. When ductile iron pipe is cut in the field, cut ends shall be tapered about 1/8-inch at a 45-degree angle and all sharp edge or rough spots removed by use of a coarse file or portable

grinder.

3.2.4.7 Wherever conditions will permit piping, which is to be buried, shall be tested before trenches are backfilled. All joints shall be examined during the open trench test, and all visible leaks entirely stopped.

3.2.5 Taps in Piping 3.2.5.1 Taps in piping shall be made for the connection of equipment gauges, sample lines, and wherever shown on the plans or required. The taps are included under this Section and may be either in the shop or in the field. Taps shall be made to the minimum thread length required under ANSI B16.1. In cast iron or ductile iron pipe, cast bosses shall be provided should the thickness of the pipe or fittings be less than that required.

3.3 TESTING

3.3.1 Test all completed piping and furnish all necessary equipment, materials and labor for making the tests as specified, including pumps, gauges, thrust protection, temporary bulkheads, etc.

3.3.2 Leakage at the joints shall be corrected by approved means and the piping retested in accordance with this specification until the tests are satisfactory.

3.3.3 Flanged pipe lines shall show no leakage during the test period. Leakage through mechanical push-on joints shall be within the permissible limits as specified in AWWA C-600.

3.4 CLOSING IN UNINSPECTED WORK

3.4.1 Do not cover up or enclose work until it has been properly and completely inspected and approved.

JUNE 2026 15060-11 MECHANICAL PIPING

AND ACCESSORIES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.4.2 Should any of the work be covered up or enclosed prior to all required inspections and approvals, uncover the work as required and, after it has been completely inspected and approved, make all repairs and replacements with such materials as are necessary to the approval of the ENGINEER and at no additional cost to the Owner.

END OF SECTION

JUNE 2026 15060-12 MECHANICAL PIPING

AND ACCESSORIES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 16010

GENERAL ELECTRICAL REQUIREMENTS

1.0 GENERAL

1.1 SECTION INCLUDES

1.1.1 This section includes materials, installation, and testing of the electrical system.

1.2 QUALITY ASSURANCE

1.2.1 Comply with applicable Regulatory Agencies and Standards: Installations, materials, equipment, and workmanship shall conform to the provisions of the following agencies:

1.2.1.1 National Electrical Code (NEC) 1.2.1.2 Occupational Safety and Health Act (OSHA) 1.2.1.3 Local authorities having lawful jurisdiction pertaining to the work required.

1.2.1.4 Underwriter’s Laboratories, Inc. (UL): Materials, appliances, equipment, and devices shall conform to the applicable UL standards. The label of, or listing by, UL is required wherever applicable.

1.2.1.5 Standards : Where referenced in these specifications or on the drawings, the publications and standards of the following organizations apply:

a American Society of Testing and Materials (ASTM) b National Electrical Manufacturers Association (NEMA) c National Fire Protection Association (NFPA) d American National Standards Institute (ANSI) e Institute of Electrical and Electronics Engineers (IEEE) f Insulated Cable Engineers Association (ICEA)

1.3 SUBMITTALS

1.3.1 Submit shop drawings in accordance with section 01300.

1.3.2 Submit Operation and Maintenance Manual in accordance with section 01300.

1.4 SPECIAL TOOLS AND SPARE PARTS

1.4.1 Provide spare parts recommended by the manufacturer.

1.4.2 Furnish one complete set of special tools required to disassemble, service, repair and adjust the equipment. Special tools are those that are not readily available through a commercial tool supplier.

JUNE 2026 16010-1 GENERAL ELECTRICAL

REQUIREMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

1.5 PRODUCT DELIVERY, HANDLING AND STORAGE

1.5.1 Deliver, handle and store the equipment in accordance with the Special Provisions and the manufacturer’s recommendations.

1.6 ELECTRICAL SERVICE CHANGES

1.6.1 These specifications and drawings delineate the remodeling of an existing structure, and/or the addition to an existing structure. While the existing structure is occupied, keep the present services intact until the new construction, facilities, or equipment is installed.

2.0 PRODUCTS

2.1 GENERAL

2.1.1 Similar materials and equipment shall be the product of a single manufacturer. The disconnect switches, motor control center, combination starters, panel boards, and manual motor starters shall be products of one manufacturer.

2.1.2 Provide only the products which are new, undamaged, and in the original cartons or containers.

2.1.3 Materials and equipment shall be the standard products of manufacturers regularly engaged in the production of such material and shall be the manufacturer’s current design.

2.1.4 Materials and equipment shall be suitable for storage, installation, and operation in an ambient of 0°C to 40°C except where more stringent conditions are stated in individual equipment specifications.

2.1.5 Electrical equipment and panels shall be factory finished with manufacturer’s standard primer and enamel topcoats, unless stated otherwise in the individual equipment specifications. Provide 1 pint of the equipment manufacturer’s touchup paint per 500 square feet of painted surface for repair of damaged enamel topcoats.

2.2 MANUFACTURERS

2.2.1 Refer to specific section for manufacturer.

2.3 DESIGN CONDITIONS

2.3.1 Section not used.

2.4 HAZARDOUS LOCATIONS

2.4.1 Conforms with NEC Articles 501 and 502 for areas identified as “Hazardous Areas.” 2.4.2 Hazardous Class 1, Division 1, areas are identified in Paragraph 2.7, D.

2.4.3 Hazardous Class 1, Division 2, areas are identified in Paragraph 2.7, D.

2.4.4 Provide equipment with ratings suitable for installation in the hazardous location identified.

JUNE 2026 16010-2 GENERAL ELECTRICAL

REQUIREMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

2.5 CLASSIFICATIONS OF EQUIPMENT

2.5.1 NEMA type Enclosure Classifications 2.5.1.1 NEMA 1 – Dry locations, use only for VFD enclosures and panelboards.

2.5.1.2 NEMA 12 – Dry locations, all other equipment not in Item 1 above.

2.5.1.3 NEMA 4X (316 Stainless Steel) – Wet locations (exterior), and corrosive locations.

2.5.1.4 NEMA 7/9 – Hazardous locations, not corrosive locations.

2.5.2 NEMA Type Panel Device and Component Classifications 2.5.3 All panel devices, instrumentation, and electrical components installed shall satisfy the NEMA type classification of the associated panel:

2.5.3.1 Dry Locations – NEMA 12 2.5.3.2 Wet Locations – NEMA 4X 2.5.3.3 Corrosive Locations – NEMA 4X 2.5.3.4 Hazardous Locations – NEMA 7/9 2.5.4 Area Classification Schedule

JUNE 2026 16010-3 GENERAL ELECTRICAL

REQUIREMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project Hazardous Dry Wet Corrosive Area Description Notes Location1 Location Location Location2 Non-Process exterior locations X Control Building Electrical Room X Operator Room X UV Room X Blower Room X Chemical Room X X Compressor Room X Influent Pump Station Influent Flow Vault X Wet Well Div. 1 X 4 Headworks Building Headwork Area Div. 1 X 4,6

Biolac Basin X Blower Building Electrical Room X Blower Room X Caustic Room X X PAR Basin Exterior (at Basin) Div. 2 X 4,5 Effluent Pump Station Headwork Area X Methanol Tank & Pump Div. 1 X 3, 4 Methanol Panel Area X Abbreviations:

Dist. – Distribution Div. – Division

JUNE 2026 16010-4 GENERAL ELECTRICAL

REQUIREMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project Notes:

1. All Hazardous Areas are Class 1, Group D.

2. “Corrosive” is not an NEC classification, it refers to rooms with chemicals stored in them.

3. Area up to and including a 36 inches distance around exposed methanol piping and a 10 foot

area around methanol tank is Class 1, Group D, Division 1 Hazardous Area.

4. Areas Designated as both Wet Location and Hazardous Location shall meet the requirements

for both locations.

5. The 18” envelope above the top of the tank wall and extending 18” horizontally from the beyond

exterior walls; from finished grade to the top of the wall extended horizontally 10’ from the wall shall be designated a Class 1, Group D, Division 2 Hazardous Location, unless otherwise noted on the drawings.

6. The entire enclosed space is rated Class 1, Group D, Division 1 Hazardous Area.

2.6 MOUNTING HARDWARE

2.6.1 Provide type 316 stainless steel mounting channel, minimum 1-5/8”, stainless steel anchor bolts, and stainless hardware for mounting all equipment, unless otherwise noted. Refer to Section 05100.

3.0 EXECUTION

3.1 INSTALLATION

3.1.1 The drawings indicate connections for typical equipment only. If the equipment furnished is different from what is shown, provide the modifications necessary for a safe and properly operating installation in accordance with the equipment manufacturer’s recommendations.

3.1.2 The drawings diagrammatically indicate the desired location and arrangement of outlets, conduit runs, equipment, and other items. Field determine exact locations based on physical size and arrangement of equipment, finished elevations, and obstructions.

3.1.3 Work or equipment not indicated or specified which is necessary for the complete and proper operation of the Electrical systems shall be accomplished without additional cost to the Owner.

3.1.4 Review demolition methods with Owner’s Representative prior to cutting or removing existing architectural and/or structural items or equipment. Repair damage to match existing, and maintain the fire rating of the existing items affected by work.

3.2 MANUFACTURER’S SERVICES

3.2.1 Comply with section 01300 for Service of Manufacturer’s Representative.

JUNE 2026 16010-5 GENERAL ELECTRICAL

REQUIREMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project services indicated in the special provisions shall be in addition to those indicated in the specification sections.

3.3 FIELD COATINGS

3.3.1 Section not used.

3.4 REMOVAL OR RELOCATION OF MATERIAL AND EQUIPMENT

3.4.1 Refer to Section 02050.

3.4.2 Unless otherwise noted, remove existing electrical materials and equipment from areas indicated for demolition or where equipment is relocated.

Remove materials no longer used, such as studs, straps, and conduits.

Remove or cut off concealed or embedded conduit, boxes, or other materials and equipment to a point at least ¾ inch below the final finished surface.

Remove existing unused wires.

3.4.3 Repair affected surfaces to conform to the type, quality, and finish of the surrounding surface.

3.5 FIELD TESTING

3.5.1 Infrared Survey / Testing 3.5.1.1 General a Conduct a NETA infrared survey of major electrical and rotating equipment in readings taken should be done with the equipment operating under loaded conditions. Motor starters shall be loaded at the full load ampere rating of the motor. All other equipment, unless indicated otherwise, shall be loaded at 80% of the overcurrent protective device rating ahead of the equipment. All

equipment shall be loaded for a minimum of 30 minutes before scanning. A Load Bank, provided by the Contractor, shall be used when the connected equipment cannot provide the required load.

3.5.1.2 Equipment to be Tested a New MCC equipment which include the following:

i Breakers.

ii Starters.

iii Motor Connections at Motor.

b Lighting Panels, Transformers, and other ancillary equipment (under normal station load).

c Methanol CP i Breakers.

ii Starters.

iii Motor Connections at Motor.

JUNE 2026 16010-6 GENERAL ELECTRICAL

REQUIREMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project d Generator i Breaker.

ii ATS Connections 3.5.1.3 Infrared Scanning of Electrical Equipment a Visual Inspection i Inspect for physical, electrical, and mechanical condition and bus alignment.

b Infrared Inspection i Perform a qualitative (Level I) infrared inspection on the equipment listed in Paragraph 3.4.B above. The infrared-scanning device used shall meet the requirements contained in Part 4 below.

c Provide a report indicating the following:

i Location, equipment, date.

ii Problem area (location of “hot spot”).

iii Indicate temperature of “hot spot” and ambient temperature.

iv Indicate cause of heat rise, if known.

v Indicate phase unbalance, if present.

vi List of areas scanned.

d Test Parameters i Infrared scanning equipment shall detect 1 degree C rise between subject area and reference at 30 degrees C.

ii Equipment shall detect emitted radiation and convert detected radiation to visual signal.

iii Both identifying photographs and thermographic photos shall be provided of the deficient areas. The thermographic photos shall be seen on the imaging system. The thermographs and identifying photos shall be contained in the report to provide a baseline inventory of the electrical system immediately preceding conditional acceptance.

e Test Results / Tolerances i Per InterNational Electrical Testing Association (NETA), operating temperature shall not exceed manufacturers or listing agency’s rating for the equipment or attached conductors. The following

JUNE 2026 16010-7 GENERAL ELECTRICAL

REQUIREMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project temperature tolerances are for equipment temperature ratings of 75 degrees C or above.

ii The following tolerances are applied to temperature gradients/differences based on comparison between phases on balanced three phase loads:

a) Temperature of 15 degrees C or

more: Contractor to correct problem immediately and re-test.

b) Temperature of 4 degrees C to 15

degrees C: Indicated probably deficiency, Contractor to repair as time permits and re-test.

c) Temperature of 1 degrees C to 3

degrees C: Indicated possible deficiency; Contractor to warrant investigation.

iii The following absolute temperature tolerances are applied to all components:

a) Temperature of 40 degrees C or

more: Contractor to correct problem immediately and re-test.

b) Temperature of 21 degrees C:

Contractor to monitor until corrective measures can be accomplished.

c) Temperature of 11 degrees C to 20

degrees C: Indicated probably deficiency, Contractor to repair as time permits and re-test.

d) Temperature of 1 degrees C to 10

degrees C: Indicated possible deficiency, Contractor to warrant investigation.

3.6 IDENTIFICATIONS AND SIGNS

3.6.1 Mark each individual panelboard, motor controller, disconnect switch, timer, relay, and contactor to identify each item with its respective service or function. Provide nameplates with engraved lettering not less than ¼ inch high. Use black-on-white laminated plastic, attached with rivets or stainless steel sheet metal screws. Do not use embossed plastic adhesive tape.

END OF SECTION

JUNE 2026 16010-8 GENERAL ELECTRICAL

REQUIREMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 16011

POWER SYSTEM STUDY AND TESTING

1.0 GENERAL

1.1 SECTION INCLUDES

1.1.1 This section describes the requirements for furnishing a protective device coordination study.

1.1.2 This Section includes general requirements for performing a power system study including short circuit analysis, coordination study, arc flash and testing. The studies shall include all portions of the electrical distribution system from the existing MCC and existing and new panelboards and motors.

1.1.3 The Contractor shall obtain the services of a single independent Power System Analysis Firm (PSA) who shall be responsible for preparing project specific studies, field information gathering of existing equipment and field testing for all components of the power study as specified herein. The PSA shall be regularly engaged in the business of performing short circuit analysis, coordination studies, arc flash analysis and testing for medium

voltage and low voltage power distribution systems.

1.1.4 The PSA and Contractor are required to obtain all information from the existing equipment and cabling through field investigation. The information provided herein is for estimating only. The County and Engineer are not responsible to provide any additional information required to complete the study. The PSA and Contractor shall coordinate directly with the power company for all fault and power data required.

1.2 QUALITY ASSURANCE

1.2.1 References 1.2.1.1 Materials and installation shall be in accordance with the latest revisions of the following codes, standards and specifications, except where more stringent requirements have been specified herein.

a Local building codes b National Electrical Code - NEC c Underwriters Laboratories, Inc. - UL d Institute of Electrical and Electronic Engineers - IEEE e Insulated Cable Engineers Association - ICEA f American National Standard Institute – ANSI

1.3 SUBMITTALS

JUNE 2026 16011-1 POWER SYSTEM STUDY

AND TESTING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 1.3.1 Submit a qualifications package for the proposed PSA for this project. The qualifications package shall include the following information which shall be organized and formatted as follows:

1.3.1.1 Company Background - Provide a brief company overview detailing PSA's experience, capabilities, and available resources.

Description of available resources shall include labor categories, staffing, and testing equipment.

1.3.1.2 Experience in Power Distribution System Evaluations - Provide a list of recent (last 5 years from the bid opening date of this Contract) projects involving Short Circuit, Coordination, Arc Flash Analysis and Testing that the company has successfully performed.

1.3.1.3 Facilities and Equipment - List type and power system analysis software and testing equipment to be used for this project 1.3.2 Submittal Coordination with Equipment Manufacturers.

1.3.3 The PSA shall obtain specific submittal information pertaining to proposed power distribution equipment from the Contractor. This shall include manufacturer's catalog information, equipment ratings, and circuit breaker curves. Reports submitted without the information on proposed power distribution equipment will be rejected. As a minimum, PSA shall obtain equipment information on the following equipment:

1.3.3.1 Methanol CP 1.3.3.2 Existing MCC-CB 1.3.4 Power System Study Reports 1.3.4.1 The PSA shall submit Power System Study Reports that shall include the coordination study, short circuit analysis, and final summary and recommendations. Three separate and distinct submittals as specified herein.

1.3.4.2 Preliminary Power System Study Report a The Preliminary Power System Study Report shall be based on the following information:

i Cables and conductors ii Transformers iii Panelboards iv Overcurrent Protective Devices v Surge Suppression Equipment vi Switchgears vii Generators

JUNE 2026 16011-2 POWER SYSTEM STUDY

AND TESTING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project viii Automatic Transfer Switches b The Preliminary Power System Study Report shall be submitted prior to, or with the individual equipment submittals as specified in the individual equipment specifications. The report information will be used by the Engineer to review the equipment submittals for overall approval of the shop drawings. Submission of individual

equipment submittals without the preliminary report will not be reviewed and will be returned to the Contractor.

c It is the responsibility of the Contractor to forward the proposed electrical equipment submittal information to the PSA prior to submission of the submittals to the engineer for review.

d The preliminary report shall consist of the following:

i List of proposed power distribution equipment to be provided, with corresponding technical information for equipment pertaining to the study.

ii Short circuit study evaluation for the proposed power distribution equipment. Provide recommendations for utilization of the proposed equipment based on the adequacy of the short circuit withstand ratings, bus bracing, and overcurrent protective device ratings.

iii Provide recommendations for mitigating problems with such issues.

e Final Power System Study Report - Report shall consist of the following.

i All information contained in the final report, with Engineer's comments addressed and incorporated.

ii Final summary and recommendations for power distribution system.

iii Report shall be submitted upon completion of all measurements and testing. Engineer's comments on the report shall be addressed, and the report resubmitted, until the final report is provided with an "APPROVED" review code by the Engineer.

iv Electronic Copies v Submit 2 copies of the electronic files for the Power System Study for future updating and reference by

JUNE 2026 16011-3 POWER SYSTEM STUDY

AND TESTING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project the Owner. Files shall be submitted as compact disc in MS Word format.

f Arc Flash hazard labels i The PSA shall furnish and install warning labels for all electrical equipment associated with this project.

1.3.5 The Protective Device Coordination Study submitted as specified shall be signed and sealed by a professional engineer licensed in the state of Maryland.

1.3.6 The Protective Device Coordination Study shall be submitted and approved prior to any the engineer reviewing or approving any other power distribution equipment. The contractor shall submit the Study as required in this Specification sections with 30 days of the Notice to proceed for the project.

All delays due to the power study approval are the responsibility of the contractor.

1.4 SPECIAL TOOLS AND SPARE PARTS

1.4.1 Provide spare parts recommended by the manufacturer.

1.5 PRODUCT DELIVERY, HANDLING AND STORAGE

1.5.1 Deliver, handle and store the equipment in accordance with the Special Provisions and the manufacturer’s recommendations.

1.6 RELATED WORK SPECIFED ELSEWHERE

1.6.1 General Requirements 16010

2.0 PRODUCTS

2.1 GENERAL

2.1.1 The Power System Study shall be provided to evaluate the power distribution system for equipment interrupting capacity, system coordination, system protection, arc flash and proper operation within the system limits. The Power System Study shall include the following components:

2.1.1.1 Short Circuit Analysis 2.1.1.2 Coordination Study 2.1.1.3 Arc Flash Hazard Analysis 2.1.1.4 Final Summary and Recommendations 2.1.2 Power system study to be done using latest version of 1.SKM Power tools or 2. ESA Easy Power program 2.1.3 Power Distribution System Information and Data

JUNE 2026 16011-4 POWER SYSTEM STUDY

AND TESTING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.1.3.1 The PSA shall obtain utility source information from the power generation department.

2.1.3.2 Motor contributions shall be based on the following estimated connected motor loads:

a Modified MCC-CB 85.5KVA b Methanol 1.2KVA c All loads shall be verified with Owner prior to performing the study.

2.1.3.3 Cable and conductor impedances may be obtained from standard libraries for equivalent conductors and cables.

2.2 SHORT CIRCUIT ANALYSIS AND STUDY

2.2.1 The short circuit analysis and coordination study shall analyze short circuit occurrence during normal conditions when the utility feeder is available. The Short Circuit Analysis and Coordination Studies shall be performed in accordance with ANSI/IEEE C37.10, ANSI/IEEE C37.13, IEEE Standard 141, IEEE Standard 242, and IEEE Standard 399.

2.2.2 Short Circuit Analysis Parameters 2.2.2.1 The short circuit analysis shall be performed to determine the available (worst case) fault level at critical buses on the distribution system. The basis for the analysis shall be that a "three-phase" bolted fault can occur anytime on any bus in the system.

2.2.2.2 Provide calculation methods and assumptions, base per unit quantities selected, one-line diagrams, source impedance data including the normal power supply system characteristics, typical calculations, tabulations of calculated quantities and results.

2.2.2.3 Calculate short-circuit interrupting and momentary (where applicable) duties for an assumed 3-phase bolted fault at the supply switchgear lineup, panelboard, and other significant overcurrent protective device locations throughout the system.

2.2.2.4 Provide a ground fault current study for the same system areas, including the associated zero sequence impedance data. Include in tabulations fault impedance, X to R ratios, asymmetry factors, motor fault contribution, short circuit kva, and symmetrical and asymmetrical fault currents.

2.2.3 Coordination Study Parameters 2.2.3.1 Provide a complete short circuit and system protection coordination study of the electrical distribution system with manufacturer's curves of each protective device indicated on common drawings, to verify proper selectivity and protection for

JUNE 2026 16011-5 POWER SYSTEM STUDY

AND TESTING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project all components of the system obtained. Include all calculations, selected equipment, devices, and recommended settings. The study shall encompass all existing and new devices from the utility connection and the on-site generators to all panelboards, and protective devices.

2.2.3.2 Provide time-current curves graphically indicating the coordination proposed for the system. Curves shall be provided on full size, log-log forms. Each curve sheet shall be provided with an appropriate title, one line diagram, and identified components or legend. The study shall include coordination curves showing the proposed settings of protective devices required to assure selective coordination. Specific time-current

characteristics of each protective device shall be plotted in such a manner that all upstream devices, including load break interrupter protective devices, will be clearly depicted on a fullsize single log paper sheet.

2.2.3.3 Provide a detailed description of each protective device identifying its type, function, manufacturer, and time-current characteristics. Provide recommended device tap, time dial, pickup, instantaneous, and time delay settings in a table format.

2.2.3.4 The curve sheets shall include the load interrupter switch fuse characteristics, low voltage equipment circuit breaker trip device characteristics, pertinent transformer characteristics, motor and generator characteristics. Devices shall be shown down to the largest branch and feeder circuit breaker in each panelboard.

2.2.3.5 Provide adjustable settings for ground fault protective devices.

2.2.3.6 Include manufacturing tolerance and damage bands in plotted fuse characteristics. Transformer full load currents, magnetizing inrush, ANSI transformer withstand ratings, and significant symmetrical fault currents shall be included on the curves.

Terminate device characteristic curves at a point reflecting the maximum symmetrical fault current to which the device is exposed.

2.2.3.7 Provide phase and ground coordination for the generator protective devices. Show the generator decrement curve and damage curve along with the operating characteristic of the protective devices.

2.3 REPORT

2.3.1 A comprehensive report shall be prepared to document each component of the Power System Study. The report shall be clearly organized and provided with tab dividers to separate logical sections. The report shall include the following information as a minimum.

2.3.1.1 General Description

JUNE 2026 16011-6 POWER SYSTEM STUDY

AND TESTING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project a Provide a general description outlining the purpose of the report. The general description shall include a basis and scope for the limits of the study.

2.3.1.2 Short Circuit Analysis a Describe the parameters which have an impact on the analysis in explicit detail.

b Compare the manufacturer's published interrupting, withstand and bus bracing ratings with the calculated available fault levels.

c Summarize any system deficiencies or shortcomings with the interrupting capability of the proposed distribution equipment.

d Provide recommendations and solutions for correcting any deficiencies.

2.3.1.3 Coordination Study a The study shall include performing time-current analysis of each protective device.

b The PSA shall provide recommendations for setting and adjusting the protective relay and circuit breaker settings and parameters to assure proper equipment and personnel protection.

c Provide conclusions based on the compiled information, and recommendations for modifications to equipment or systems to correct any deficiencies 2.3.1.4 Arc Flash Analysis a The Report shall include an Incident Energy Study performed in accordance with the IEEE 1584-2004a, “IEEE Guide for Performing Arc Flash Hazard Calculations” as referenced in NFP A 70, “Standard for Electrical Safety in the Workplace”, latest Revision, in

order to quantify the hazard selection of personal protective equipment (PPE). Tables that assume fault current levels and clearing time for proper PPE selection are not acceptable.

b Report shall include incident energy level (calories/cm2) for each equipment location and recommended PPE.

c The PSA shall optimize the results of the study as it relates to safety and reliable electrical system operation (e.g. overcurrent device settings, working distances, current limiting devices). This includes mitigation, where

JUNE 2026 16011-7 POWER SYSTEM STUDY

AND TESTING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project possible, of incident energy levels that exceed 40 calories/cm2.

2.3.1.5 Existing Equipment Information a The preliminary report shall contain information on existing electrical distribution equipment.

2.3.1.6 Final Summary and Recommendations a Provide a final summary of all findings, and final recommendations, based on field measurements taken, and analyses performed.

2.3.1.7 Appendices a Provide computer input and output databases used in the evaluations.

b Provide one or more comprehensive one-line diagrams for the power distribution system. Components shall be specifically labeled with tags and values which correlate to referenced items noted in the studies.

c Provide an equivalent impedance one-line diagram for the power distribution system. Components shall be specifically labeled with tags and impedance values which correlate to referenced items noted in the studies.

d Provide field data for power measurement values obtained while conducting field measurement surveys.

2.4 ARC FLASH HARD LABELS

2.4.1 Based on the results of the incident energy study, the supplier shall produce and install warning labels (orange <40 call/cm2 or danger label red (red >40 call/cm2) for each piece of equipment in accordance with ANSIZ535.4-2002.

The label must be readable in both outdoor and indoor environments for at least 3 years and contain the following information.

2.4.1.1 Arc hazard boundary (inches).

2.4.1.2 Working distance (inches).

2.4.1.3 Arc flash incident energy at the working distance (calories/cm2).

2.4.1.4 PPE category and description including the glove rating 2.4.1.5 Voltage rating of the equipment 2.4.1.6 Limited approach distance (inches) 2.4.1.7 Restricted approach distance (inches) 2.4.1.8 Prohibited approach distance (inches) 2.4.1.9 Equipment/bus name

JUNE 2026 16011-8 POWER SYSTEM STUDY

AND TESTING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.4.1.10 Date prepared 2.4.1.11 PSA name and address

3.0 EXECUTION

3.1 INSTALLATION

3.1.1 Power distribution equipment shall not be energized prior to adjusting and setting all of the relay protective devices in accordance with approval of the pre-final Power System Study Report.

3.2 DATA COLLECTION

3.2.1 Existing Equipment 3.2.1.1 Perform a site survey of the existing electrical distribution system in order to collect comprehensive data necessary for the power system study. Obtain field data and equipment nameplate information for the existing equipment which will remain as part of the power distribution system. Obtain type, length, and size information for existing feeders. Survey information shall be

submitted as part of the preliminary power system study report.

3.2.2 Utility Information 3.2.2.1 Short-circuit currents or impedances available from the power generation system supplying the new power distribution system, and time-current characteristics and the settings of the utility protective devices on the supply side of the feeders shall be requested from the power generation department by the PSA.

3.2.3 Equipment Submittals and Technical Information 3.2.3.1 The PSA shall obtain equipment submittal information and technical information for the power distribution equipment proposed for the project 3.2.4 Field Calibration 3.2.4.1 The PSA shall supervise the performance of the on-site field adjustments for the protective relays, devices, and adjustable circuit breaker settings. The settings shall be adjusted in

accordance with the final Power System Study Report.

3.2.4.2 The on-site field adjustments shall be supervised by a power systems technician who shall be present, on-site, as required to set and calibrate each power distribution unit. This Contractor shall coordinate the number of site trips required for the PSA with the sequencing of the installation and startup of the associated equipment. The technician shall be present on-site for a minimum of 16 hours (excluding travel time) for installation assistance,

inspection, and certification of the installation.

JUNE 2026 16011-9 POWER SYSTEM STUDY

AND TESTING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.2.5 Measurements and Testing 3.2.5.1 Field measurements shall be performed in the presence of the Engineer's Representative. The PSA shall furnish all materials, labor, and equipment necessary to conduct field measurements.

The PSA shall maintain a written record of all measurements, which includes date, test performed, personnel involved, devices tested, serial number and name of test equipment, and measurement results in the form of an analysis report described below.

3.2.5.2 The PSA shall perform on-site field services and data collection to obtain power measurements (real power, kW and reactive power kV AR) for the distribution system. Measurements shall be taken at the following busses as a minimum:

a Transformers b ATSs c MCCs d Panelboards HP 3.2.5.3 The PSA shall note specific conditions at the time the measurements are taken, including motor status, motor speed, loading levels. Snapshots of measurements shall be taken for VFDs rated 10 Hp and larger. Power measurements shall be compared to values provided by the digital power meters and digital power monitors located on the equipment.

3.2.5.4 The PSA shall coordinate scheduling of the work with the Contractor in order to test the system with all equipment in operation. The Contractor shall make arrangements to schedule all monitoring work in order to not adversely effect the treatment plant operation.

END OF SECTION

JUNE 2026 16011-10 POWER SYSTEM STUDY

AND TESTING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 16051

MISCELLANEOUS ELECTRICAL DEVICES

1.0 GENERAL

1.1 DESCRIPTION

1.1.1 This section includes materials and installation of miscellaneous electrical devices and equipment.

1.2 SUBMITTALS

1.2.1 Submit shop drawings in accordance with Section 01300.

1.2.2 Submit ratings and characteristics including voltage ratings, continuous current ratings, fault current withstand rating, conduit entry restrictions, enclosure type, dimensions and mounting provisions.

1.2.3 Submit operation and maintenance manuals in accordance with

Section 01300.

2.0 MATERIALS

2.1 DISCONNECT SWITCH

2.1.1 Provide non-fusible disconnect switches with ampere rating and number of poles as indicated in the drawings. Switches shall be NEMA heavy-duty Type HD. Provide switches in NEMA rated, as shown on the drawings. Mechanisms shall have quick-make and quick-break operating handles and provisions for padlocking in the positions. The switch shall have an interlock to prevent unauthorized opening of the hinged cover when the switch is in the “ON” position

and an interlock to prevent closing the switch mechanism with the hinged cover open. Fusible switches shall be equipped with rejection feature. Switch contacts shall be silver or tinned plated. On the front of the enclosure, attach a nameplate that identifies the load per

Section 16010.

Disconnect switches shall be Square D, or equal.

2.1.2 Provide disconnect switches in NEMA 3R OR 4X 304 stainless steel enclosures as specified on the drawings.

2.1.2.1 Provide NEMA 4X rated disconnects at the PAR tank and at the blowers.

2.1.3 Safety switches shall be UL listed in accordance with Article 404 of the NEC/NFPA 70.

2.2 LIMIT SWITCHES

JUNE 2026 16051-2-1 MISCELLANEOUS

ELECTRICAL DEVICES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.2.1 Provide heavy-duty, precision turret head type limit switches with one normally open and one normally closed contact along with an adjustable lever arm with oil-impregnated sintered iron roller.

2.2.2 The switches shall be interfaced with the pump control panel, or as shown on the drawings. For door and hatch switches, mount switch on inside doorframe such that when opened, the normally close switch contacts shall open and, when closed the normally close switch contacts shall close.

2.2.3 Provide a Square D, Class 9007, Type C switch or equal.

2.2.4 For switches in hazardous locations provide intrinsically safe relays, and switches rated for the installation.

2.3 SERVICE DISCONNECT

2.3.1 Main breakers shall be molded-case thermal magnetic type. Provide quick make and quick break toggle mechanism and trip-free operation on overload or short-circuit.

2.3.2 Provide trip ratings and number of poles as indicated on the drawings. Main breakers shall be UL rated as service equipment and enclosure so marked. Mount in NEMA rated enclosure with external handle with requirements as required by Feeder Breakers. Minimum interrupting rating shall be specified on drawing.

2.3.3 External handle shall have lockable open and close positions.

Provide padlock that is keyed to match building locks.

3.0 EXECUTION

3.1 MOUNTING

3.1.1 Provide standoff brackets providing a minimum of 1-1/2-inch air space between the equipment and the mounting surface. Provide 316 stainless steel brackets and concrete anchors.

3.1.2 Mount the main circuit breaker as shown on the drawings in lockable enclosures with mechanisms to operate the breaker on the exterior of the enclosure. Circuit breakers shall be molded case type with same ratings as shown on the drawings.

3.1.3 Mount limit switches, as shown on drawings, and as recommended by the manufacturer.

3.1.4 Provide and install all wire and conduit for installation.

JUNE 2026 16051-3-2 MISCELLANEOUS

ELECTRICAL DEVICES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

3.2 INSPECTION/TEST

3.2.1 Operate each switch and circuit breaker, under load, and verify that all phases of the load are disconnected each time.

3.2.2 Operate each device contacting limit switch to verify limit switch contacts are energized for accurate response to the motion.

END OF SECTION

JUNE 2026 16051-3-3 MISCELLANEOUS

ELECTRICAL DEVICES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 16110

RACEWAYS, BOXES, AND FITTINGS

1.0 GENERAL

1.1 SECTION INCLUDES

1.1.1 This section describes materials and installation of raceway systems, whether concealed or exposed, above or below grade.

1.2 SUBMITTALS

1.2.1 Submit shop drawings in accordance with Section 01300.

1.2.2 Submit material list for all conduits, fittings, boxes, conduit bodies, mounting hardware, and related accessories.

1.2.3 Submit scaled, accurate conduit layout drawings for each building, facility, vault, and for the site.

1.3 SPECIAL TOOLS AND SPARE PARTS

1.3.1 Provide spare parts recommended by the manufacturer.

1.3.2 Furnish one complete set of special tools required to disassemble, service, repair and adjust the equipment. Special tools are those that are not readily available through a commercial tool supplier.

1.4 PRODUCT DELIVERY, HANDLING AND STORAGE

1.4.1 Deliver, handle and store the equipment in accordance with SP-13, SP-14, and the manufacturer’s recommendations.

1.5 RELATED WORK SPECIFIED ELSEWHERE

1.5.1 16010 – General Electrical Requirements 1.5.2 16120 – Wire and Cables

2.0 PRODUCTS

2.1 GENERAL

2.1.1 Rigid Steel Conduit and Fittings 2.1.1.1 Use rigid, thick wall, hot-dipped galvanized inside and out, with galvanized threads conforming to ANSI C80.1 and UL-6. Do not use electrogalvanizing.

2.1.1.2 Use insulated metallic bushings. Sizes 1 inch and smaller may be nonmetallic type.

2.1.1.3 Use hot-dipped galvanized threaded fittings which are compatible with the conduit.

2.1.1.4 Use cast aluminum or hot-dipped galvanized cast-iron conduit bodies, equipped with threaded covers or gasketed sheet metal covers secured with at least two captive screws.

JUNE 2026 16110-1 RACEWAYS, BOXES,

AND FITTINGS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.1.2 Rigid Nonmetallic Conduit and Fittings 2.1.2.1 Polyvinyl chloride (PVC) Schedule 40 or 80, 90 C rise rating.

Conduit shall conform to NEMA TC-2 and UL-651.

2.1.3 PVC-Coated Conduit and Fittings 2.1.3.1 PVC-coated conduit and fittings shall be rigid galvanized steel with a .040-inch-minimum thickness of PVC coating. Interior coating shall be 2-mil urethane. Conduit and fittings shall be UL listed and shall conform to ANSI C80.1 and to UL-6.

2.1.4 Liquid-Tight Flexible Conduit and Connectors 2.1.4.1 Use single strip steel, hot-dipped galvanized on all four sides prior to conduit fabrication. Conduit shall have overall PVC plastic jacket. Conduit sizes 1-1/4 inches and smaller shall include an integral copper bonding conductor wound spirally in the space between each convolution on the inside of the conduit.

Conform to UL-360.

2.1.4.2 Use compression type bushings with steel or malleable iron body and insulated throat and sealing O-ring.

2.1.4.3 All fittings shall be PVC coated.

2.1.5 Flexible Conduit and Connectors 2.1.5.1 Use single strip steel, hot-dipped galvanized on all four sides prior to conduit fabrication. Conform to UL-1.

2.1.6 Outlet, Junction, and Pull Boxes 2.1.6.1 Provide boxes for installation of electrical work, in compliance with codes and regulations.

2.1.6.2 Provide one-piece galvanized pressed steel knockout-type boxes, nominal sizes 4 inches square by 1-1/2 inches in flushmounted or concealed locations above suspended ceilings unless otherwise indicated. Boxes for use in concrete shall have square corner tile type covers with ribs or extensions for casting in concrete.

2.1.6.3 Construct pull boxes in flush-mounted or concealed locations that are larger than 4 inches square by 1-1/2 inches of code-gauge sheet steel finished with one coat of metal primer and one coat of primer sealer.

2.1.6.4 Use PVC coated threaded-hub ferrous boxes for surfacemounted or exposed locations. PVC coated cast conduit fittings may be used instead of boxes except where boxes contain devices.

2.1.6.5 Where threaded-hub cast boxes and fittings are not practical, provide NEMA 4X pull boxes constructed of Type 304 stainless steel. Install cover with neoprene gaskets and Type 304 stainless steel bolts. Attach conduit with “Myers” hubs.

JUNE 2026 16110-2 RACEWAYS, BOXES,

AND FITTINGS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.1.7 Manholes and Handholes 2.1.7.1 Manholes shall be precast per ASTM C 478 with 28-day, 3000- psi minimum compressive strength concrete and designed for AASHTO H-20 loading. Manholes shall have minimum interior dimensions as shown on drawings with a concrete throat to the surface. Provide a drainage outlet at the low point of the floor

constructed with a cast-iron, slotted or perforated hinged cover, and a 4-inch-minimum outlet and outlet pipe. Set manholes on a crushed rock base 12 inches thick with horizontal dimensions same as bottom of manhole plus 6 inches all around.

2.1.7.2 Handholes shall be electrical-type utility boxes manufactured by Quickset, Brooks Products, or equal. Handhole minimum interior size shall be as shown on drawings. Provide handholes with concrete boltdown covers in unpaved areas and handholes with cast-iron covers with boltdowns and lifting hook in paved areas.

Set the handhole on a crushed rock base 6 inches thick with horizontal dimensions same as bottom of handhole plus 6 inches all around. Crushed rock shall be 3/4 inch maximum size.

2.1.7.3 Provide raceway entrances on all four side. For raceways installed under this contract, knockout panels or precast individual raceway openings may be used. On sides where no raceways are installed under this contract, provide 12-inch-high by 24-inch-wide (minimum) knockout panels for future raceway installation.

2.1.7.4 Utilize frames and covers made of cast iron, suitable for street loading. On the upper side of each cover, cast in integral letters not less than 2 inches high appropriate titles, ELECTRIC HV (for above 600 volts), ELECTRIC LV (for 600 volts and below), or CONTROL. Field stamp covers with manhole or handhole numbers indicated on the drawings. Cover shall be minimum 36” diameter.

2.1.7.5 Provide cable racks with adjustable arms and insulators for cables in each manhole. Set adjustable inserts in the concrete walls for the attachment of racks. Do not use bolts or studs embedded in concrete for attaching racks. Set racks and inserts not greater than 3-foot centers around the entire inside perimeter of the manhole, arranged so that spare conduit ends are clear for future cable installation. Provide racks with arms and insulators

to accommodate cables for each conduit entering or leaving the manhole including spares.

2.1.7.6 Provide a pulling iron embedded in the concrete wall or flush with the concrete floor opposite each raceway entrance and one in the floor vertically below the center of the manhole cover. Utilize ¾-inch-round stock securely fastened to the overall steel reinforcement before concrete is poured.

JUNE 2026 16110-3 RACEWAYS, BOXES,

AND FITTINGS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.1.7.7 Provide an aluminum ladder with square rungs permanently mounted within the manhole. Rungs shall have serrated nonskid tops.

2.1.7.8 Concrete pull boxes, handholes and vaults shall be precast with pull-in irons, hot-dipped galvanized traffic cover with hot-dipped galvanized frame, and two galvanized cable racks with porcelain blocks on each of the two longest sides. Design for AASHTO H- 20 loading. Provide bead weld on cover of pull box to indicate services within pull box (electrical, telephone, fire alarm, signal).

After cables have been pulled and inspected, seal box between cover and frame with a mastic compound similar to Parmagum, Dukaseal, or equal.

2.1.7.9 Provide barriers and securely fasten conductors of different voltages in manholes and handholes to provide complete separation of the systems.

2.1.8 Hazardous Locations 2.1.8.1 Conform with NEC Articles 501 and 502 for areas identified as “Hazardous Areas” in the specifications and on the drawings.

2.1.8.2 Provide threaded cast boxes and fittings for junction boxes and pull boxes in Class I and Class II areas. Boxes and fittings shall conform with Class I, Groups A, B, C, and D and Class II, Groups E, F, and G requirements.

2.1.8.3 Fixture hangers for pendant-mounted fixtures shall conform with Class I, Division 1 and Class II, Division 1 requirements.

2.1.8.4 Provide conduit seals in Class I, Division 1 and Class I, Division 2 locations within 18 inches of each conduit entering an enclosure containing electrical devices except for hermetically sealed switches and receptacles. Provide a conduit seal for each conduit leaving the hazardous location.

2.1.8.5 Flexible connections to motors and other vibrating equipment in Class I, Division 1 locations shall be made with flexible fittings approved for Class I, Division 1 locations.

2.1.9 Concrete-Encased Duct Banks 2.1.9.1 Concrete shall be Mix No. 1 in accordance with Section 03300.

2.2 MANUFACTURERS

2.2.1 PVC Coated Conduit and Fittings: Conduit and fittings shall be Permecote Supreme or equivalent product of Occidental or Robroy.

2.2.2 Manhole / Handhole Manufacturers: Brooks Products, Inc.; Penn-Cast Products, Inc.; Concrete Conduit Company; Associated Concrete Products, Inc.; or equal.

JUNE 2026 16110-4 RACEWAYS, BOXES,

AND FITTINGS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

2.3 DESIGN CONDITIONS

2.3.1 None required.

3.0 EXECUTION

3.1 INSTALLATION

3.1.1 Conduit Usage: Install the following types of raceway in the locations listed, unless otherwise indicated on the drawings.

3.1.1.1 Exterior, Exposed:

a Rigid non-metallic conduit Schedule 80 3.1.1.2 Interior, Exposed:

a Galvanized steel conduit.

3.1.1.3 Embedded in Concrete or Masonry:

a Rigid non-metallic conduit, schedule 40 3.1.1.4 Underground Direct Burial, or Below Concrete Slabs:

a Rigid non-metallic conduit Schedule 80 3.1.1.5 Underground Concrete Encased:

a Provide rigid nonmetallic conduit. Provide rigid steel conduit long radius elbows for bends exceeding 45 degrees (see requirement for conduit stub-ups) b Rigid steel conduit (see requirement for conduit stubups).

3.1.1.6 Final Connections to Motors or Vibrating Equipment: Liquid-tight flexible conduit.

3.1.1.7 Connections to Suspended Lighting Fixtures: Liquid-tight flexible conduit.

3.1.1.8 Conduit Stub-ups: Provide PVC-coated conduit for stub-ups.

3.1.1.9 All fittings for conduit or enclosures which are connected to PVC coated conduit or fittings shall be PVC coated.

3.1.2 Conduit Installation 3.1.2.1 Conduit runs are shown schematically. Supports, pull boxes, junction boxes, and other ancillary equipment are not usually shown. Provide pull boxes and junction boxes where shown. In addition, provide pull boxes and junction boxes to permit pulling of wires without damage to the conductors or insulation.

3.1.2.2 Install exposed conduits parallel to or at right angles to the lines of the building. Make right-angle bends in exposed conduit runs with standard elbows, threaded conduit fittings, or conduit bent to radii not less than those of standard elbows.

JUNE 2026 16110-5 RACEWAYS, BOXES,

AND FITTINGS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.1.2.3 Route exposed conduit to preserve headroom, access space, and work space.

3.1.2.4 Conduit in Concrete Slabs: Run conduits 2 inches clear from face of slab and 3 inches clear between other conduits.

3.1.2.5 Do not route conduits below or within concrete footings except to cross footing at 90-degree angles.

3.1.2.6 Conduit in Concrete Walls: Run conduits in center of wall and 4 inches vertical clearance between other conduits.

3.1.2.7 Provide expansion fittings for raceways crossing expansion joints in structures or concrete slabs.

3.1.2.8 Treat threaded joints of rigid steel conduit with T&B “Kopr-Shield” before installing fittings where conduit is in slabs and other damp or corrosive areas.

3.1.2.9 Terminate steel conduits with double locknuts (2) and bushings.

3.1.2.10 When terminating in threaded hubs, screw the conduit or fitting tight into the hub so that the end bears against the fire protection shoulder. When chase nipples are used, install the raceway and coupling square to the box and tighten the chase nipple with no exposed threads.

3.1.2.11 All conduits shall enter exterior pullboxes, control panels, junction boxes, and all other enclosures from the bottom. No top entries allowed without prior approval by the Owner.

3.1.2.12 Provide minimum 12” separation of conduits with twisted shielded pair analog signal wiring and conduits with power circuits.

3.1.2.13 Do not route conduit, conduit fittings, or install junction boxes in sump, containment or other areas subject to submerging conduits and fittings.

3.1.2.14 All conductors in a common raceway, junction box, or fitting shall have the same voltage rating.

3.1.3 Duct Banks and Concrete Encasements 3.1.3.1 Provide 24-inch-minimum cover for direct burial underground conduit. Provide 4-inch minimum sand above and below conduit.

Underground conduits shall be direct buried unless identified as concrete encased on the drawings, or as specified herein.

3.1.3.2 Provide 30-inch-minimum cover above top of concrete for concrete-encased duct banks. Provide 4-inch-minimum separation between conduits and 4-inch-minimunm concrete encasement around conduits. Extend the concrete encasement under any floor slabs or equipment mounting pads to the point of raceway termination.

JUNE 2026 16110-6 RACEWAYS, BOXES,

AND FITTINGS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.1.3.3 All conduits installed under traffic areas shall be concrete encased. This includes all asphalt, gravel, concrete, and other areas where vehicular traffic occurs.

3.1.3.4 Where other utility piping systems are encountered or being installed along a raceway route, maintain a 12-inch-minimum separation between raceways and other systems in parallel runs.

Do not place raceways over valves or couplings in other piping systems. Refer conflicts with these requirements to the Owner’s Representative for instructions before further work is done.

3.1.3.5 Maintain a grade of at least 4 inches per 100 feet either from one manhole or pull box to the next or from a high point between them, depending on the surface contour. Slope ducts from buildings to pull boxes, handholes, or manholes.

3.1.3.6 Changes in direction of over 10 degrees shall be with long sweep bends with minimum radii of 10 feet. Manufactured bends may be used at manholes or pull boxes for runs under 100 feet.

Minimum radii of conduit under 3 inches shall be 18 inches. For conduit 3 inches and larger, minimum radii shall be 36 inches.

3.1.3.7 Thoroughly clean conduits before laying. During construction and after completion, the conduit ends shall be kept plugged to prevent water from washing mud into the manholes, handholes, or pull boxes.

3.1.3.8 Terminate conduit in end bells in manholes, handholes, and pull boxes and enter at right angles to the wall.

3.1.3.9 Place separators every 4 feet on center and securely anchor to prevent movement.

3.1.4 Conduit Supports 3.1.4.1 Support conduit at intervals and at locations as required by the NEC. Do not use perforated strap or plumbers tape for conduit supports.

3.1.4.2 Above suspended ceilings, support conduit on or from the structure except that individual conduits of 1 inch or smaller size may be supported from the suspension wires (using “caddy” spring steel fasteners) or from the ceiling channels (using 16- gauge galvanized annealed tie wire). Support conduit attached to the suspension system at maximum 4-foot intervals.

3.1.4.3 Conduit on Concrete or Masonry: Use one-hole malleable iron clamps with pipe spacers (clamp backs) or preformed galvanized steel channels. Anchor with metallic expansion anchors and screws or from preset inserts. Use preset inserts in prestressed concrete. On plaster or stucco, use one-hole malleable iron straps with toggle bolts. For PVC coated conduit use PVC coated clamps and spacers.

3.1.4.4 Suspended Conduit: Use Type 304 stainless-steel pipe hangers with Type 304 stainless-steel pipe hangers with Type 304

JUNE 2026 16110-7 RACEWAYS, BOXES,

AND FITTINGS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project stainless-steel threaded suspension rods sized for the weight to be carried (minimum 3/8 inch diameter); Unistrut, Kin-Line, or equal. For grouped conduits, construct racks with Type 304 stainless-steel rods and 6063-T6 extruded aluminum preformed channel cross members. Construct channel to limit deflection to 1/200 of span. Conduit clamps shall be aluminum. Provide Type

304 stainless-steel bolts and nuts.

3.1.4.5 Supports at Structural Steel members use type 304 stainlesssteel beam clamps. Drilling or welding may be used only where indicated on the drawings.

3.1.4.6 Wherever conduit may be affected by dissimilar movements of the supporting structures or medium, provide flexible or expansion devices.

3.1.5 Conduit Penetrations 3.1.5.1 Dry-pack with nonshrink grout around raceways that penetrate concrete walls, floors, or ceilings above ground, in addition to paragraphs 2. and 3.

3.1.5.2 Where an underground concrete ductbank enters a structure through a concrete roof or a membrane waterproofed wall or floor, provide a malleable waterproofed wall or floor watertight, entrance sealing device. When there is no raceway concrete encasement specified or indicated, provide such a device having a gland-type sealing assembly at each end with pressure bushings which may be tightened at any time. When there is

raceway concrete encasement specified or indicated provide such a device with a gland-type sealing assembly on the accessible side. Securely anchor all such devices into the masonry construction with one or more integral flanges. Secure membrane waterproofing to such devices in a permanently watertight manner.

3.1.5.3 Where an underground raceway without concrete encasement enters a structure through a wall or floor, install a watertight entrance sealing device, such as Linkseal.

3.1.6 Warning Tapes 3.1.6.1 Bury warning tapes above all underground direct buried and concrete-encased conduits and duct banks. Align parallel to and within 3 inches of the centerline of the conduit or duct bank.

Warning tape should be at locatable type.

3.1.6.2 Plastic tape shall be yellow, 3-inch minimum width. Utilize tape made of material resistant to corrosive soil. Use tape with printed warning that an electric circuit is located below the tape.

Manufacturers and types: ITT Blackburn Type YT, Griffolyn Co., Terra-Tape, or equal.

3.1.7 Manholes, Handholes, and Pull Boxes 3.1.7.1 Install per Division 3.

JUNE 2026 16110-8 RACEWAYS, BOXES,

AND FITTINGS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.1.7.2 Install covers flush with finished paved surfaces. In unpaved areas, install the top of manhole or pull box covers 1 inch above finished grade or 6 inches above unfinished grade.

3.1.7.3 Securely support cables on manhole or pull box walls by cable racks, support arms, brackets, and insulators.

3.1.7.4 At inside each manhole, handhole, and pull box, at a convenient location close to a wall, provide a ¾ - inch by 10 foot ground rod driven with 6 inches of rod exposed. Provide a watertight seal.

Grounding and bonding shall be per Section 16450.

3.1.7.5 Excavation, backfilling, and grading shall conform to requirements of Division 2.

3.1.7.6 Use box extension sections where necessary to raise cover to height required depending on grade finish.

3.1.8 Damaged Conduit 3.1.8.1 Replace conduit damaged during or after installation. Replace crushed or clogged conduit or any conduit whose inner surface is damaged or not smooth.

3.1.8.2 Repair cuts, nicks, or abrasions, in the zinc coating of galvanized conduit with galvanizing repair stick, Enterprise Galvanizing “Galvabra” or equal.

3.1.9 Mandrel 3.1.9.1 For raceways in concrete-encased duct banks, after the concrete envelope has set, pull a mandrel of a diameter approximately ¼ inch less than the raceway inside diameter, through each raceway. Then pull a bristle brush through each raceway to remove debris.

3.1.10 Pull Cord 3.1.10.1 Provide 200-pound strength nylon pull cord in all used and empty conduits.

3.1.11 Pull Boxes 3.1.11.1 Support wall-mounted pull boxes and panels in all locations with Type 304 stainless-steel preformed channels and Type 304 stainless-steel concrete anchors.

END OF SECTION

JUNE 2026 16110-9 RACEWAYS, BOXES,

AND FITTINGS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 16120

WIRES AND CABLES

1.0 GENERAL

1.1 SECTION INCLUDES

1.1.1 This section describes materials and installation of wires and cables.

1.2 QUALITY ASSURANCE

1.2.1 Comply with applicable portions of section 16010.

1.3 SUBMITTALS

1.3.1 Submit shop drawings in accordance with section 01300.

1.3.2 Submit material list for each conductor type. Indicate insulation material, conductor material, voltage rating, manufacturer and other data pertinent to the specific cable, such as type shielding, number of pairs, and applicable standards.

1.4 SPECIAL TOOLS AND SPARE PARTS

1.4.1 Provide spare parts recommended by the manufacturer.

1.5 RELATED WORK SPECIFIED ELSEWHERE

1.5.1 16010 – General Electrical Requirements 1.5.2 16110 – Raceway, Boxes, and Fittings

2.0 PRODUCTS

2.1 GENERAL

2.1.1 Low-voltage Building Wire 2.1.1.1 Conductor material shall be copper.

2.1.1.2 Low-voltage building wire for use at 600 volts or less shall be 600- volt insulated, Type THWN, and rated for continuous operation at 75C.

2.1.1.3 In underground conduits and ductbanks, utilize type XHHW, 75C, 600 volt conductors.

2.1.1.4 No. 12 AWG minimum conductor size for power and lighting circuits.

2.1.1.5 No. 14 AWG minimum conductor size for control circuits.

2.1.1.6 All conductors shall be stranded.

JUNE 2026 16120-1 WIRES AND CABLES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.1.2 Instrument Cable 2.1.2.1 Single-pair cables shall be two No.18 AWG stranded tinnedcopper conductors individually insulated with fully color-coded PVC rated at 600 volts; insulated conductors twisted together and shielded with a spiral-wound metal foil tape overlapped for 100% shielding. Outer jacket shall be PVC.

2.1.2.2 Multiple-pair cables shall have number of pairs specified with each pair being two No. 18 AWG stranded tinned-copper conductors individually insulated with PVC rated at 600 volts.

Conductor pairs shall have insulation pigmented black and white with white conductor numerically printed for group identification.

Each pair and its 20 AWG stranded tinned-copper drain wire shall be twisted together and shielded with an aluminum-polyester tape overlapped for 100% shielding. Provide a cable shield of 2.35-mil aluminum-polyester tape overlapped to provide 100% shielding and an 18 AWG copper drain wire. Provide a flameretardant PVC jacket per UL 13, 105C temperature rating.

2.1.3 Network Cable 2.1.3.1 Provide Category 6 shielded plenum rated network cabling. The cable shall be solid 24 AWG conductor, 4 pair, unshielded type.

Provide cable with jacket. Cable shall be suitable for 100 Mbps communications. Provide Belden, or equal.

2.1.3.2 Provide RJ-45 jack outlets for connecting equipment to the Ethernet network. Each jack shall be wired to an 8-position terminal strip for connection of the Category 6 cable.

2.1.3.3 Provide cabling, couplers, end connectors, T-connectors, terminators, junction boxes and all other associated cable connectors as required for supplying a complete and fully integrated system for each of the communication networks, and as required by the manufacturer.

2.1.4 Variable Frequency Drive Cables 2.1.4.1 All conductors from VFDs to associated motors shall be use VFD cables specifically made for the application. Cable shall be multiconductor, 600 volt, for PWM type VFD inverters, provide cable with 3 power conductors and overall copper tape shield with XLPE insulation, rated at 90 degrees C, and a PVC jacket.

Cable shall be manufactured by Belden, General Cable, or equal.

3.0 EXECUTION

3.1 INSTALLATION

3.1.1 Wire Installation 3.1.1.1 Install wiring and cable in conduit unless otherwise noted.

JUNE 2026 16120-2 WIRES AND CABLES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.1.1.2 To reduce pulling tension in long runs, coat cables with pulling compound recommended by the cable manufacturer before being pulled into conduits.

3.1.1.3 Remove debris and moisture from the conduits, boxes, and cabinets prior to cable installation.

3.1.1.4 Group conductors No. 1/0 and smaller in panelboards, cabinets, pull boxes, and switchboard wireways; tie with plastic ties; and fan out to terminals. Lace conductors No. 2/0 and larger with marline.

3.1.2 Identification 3.1.2.1 Color coding of Low-Voltage Building Wire: Provide color coding throughout the entire network of feeders and circuits (600 volts and below) as follows:

Phase 208/120 480/277 240 Volts 240/120 Volts Volts Volts Phase A Black Brown Black Black Phase B Red Orange Red Red Phase C Blue Yellow Blue Neutral White Gray White White Ground Green Green Green Green 3.1.2.2 Conductors No. 10 AWG and smaller shall have factory color coding with solid color insulation. Do not use onsite coloring of ends of conductors or apply colored plastic adhesives in lieu of

factory color coding.

3.1.2.3 Conductors No. 8 AWG and larger shall have factory color coding with solid color insulation or shall have black insulation with onsite application of colored plastic adhesives at ends of conductors and at each splice.

3.1.2.4 Control wires shall have colored insulation. Control wiring coloring shall be same as specified in Section 16946.2.05.

3.1.2.5 Tagging of Conductors: Tag control wires and instrument cables in panels, pull boxes, wireways, and at each control device with adhesive type of marker: Brady, Thomas and Betts, or equal.

Tag control wires and instrument cables with same wire numbers as on the shop drawing submittals. Tag power wires in pull boxes and wireways where there is more than one circuit. Tag power conductors with motor control center or panelboard number and circuit numbers.

JUNE 2026 16120-3 WIRES AND CABLES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.1.3 Low-voltage Wire Splices 3.1.3.1 Solid Conductors: Use 3M “Scotchlok,” Ideal “Super Nut,” Buchanan B-Cap, or equal. Seal splices in underground handholes and pull boxes and in light poles with individual sealing packs of Scotchcast Brand 400 Resin or equal.

3.1.3.2 Stranded Conductors No. 8 and Larger: Use T & B “Locktite” connectors, Burndy Versitaps and heavy-duty connectors, O.Z.

solderless connectors, or equal.

3.1.3.3 Stranded Conductors No. 10 and Smaller: Use crimp connectors with tools by same manufacturer and/or UL listed for connectors of all stranded conductors.

3.1.3.4 Retighten bolt-type connectors 24 to 48 hours after initial installation and before taping. Tape connections made with noninsulated-type connectors with rubber-type tape, one and one-half times the thickness of the conductor insulation, then cover with Scotch 33 tape.

3.1.3.5 Do not splice cables unless specific concurrence is obtained from the Owner’s Representative. Make splices and terminations in accordance with the splice or termination manufacturer’s instructions.

3.2 FIELD TESTING

3.2.1 Insulation Resistance Tests 3.2.1.1 Test each complete power and digital control circuit prior to energizing. Insulation resistance between conductors and between each conductor and ground shall not be less than 25 megohms. Repair or replace wires or cables in circuits which do not pass this test and repeat the test.

3.2.2 Control Cable Testing 3.2.2.1 Installation: Prior to installing the cable, megger the reel of cable for continuity of each cable pair. Record test results and submit to the Owner’s Representative. The intention of these specifications is that the cable shall be installed without splices except as identified on the drawings. Provide sufficient length of continuous cable to permit installation without splices. Protect the

cable during and after installation.

3.2.2.2 Testing: After installing the cable, conduct an acceptance test to verify that the cable performs to the specifications. The test shall be for the entire length of the cable. Notify the Owner’s Representative three days minimum prior to the scheduled tests.

3.2.2.3 Test each cable for continuity and attenuation. These loop back test values shall be within 10 of the specifications.

3.2.2.4 In the event that the cable should fail to pass the test, ascertain the location of the defects and replace the cable. Repeat the

JUNE 2026 16120-4 WIRES AND CABLES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project acceptance test. Repeat this procedure until successful tests are obtained.

3.2.2.5 Communication, instrumentation, and 50 volt (or less) control cables shall be kept separated from all power wiring and cable.

The control cable shall be run in separate conduit and shall be kept at least three inches from 120 VAC circuits and proportionately greater distances for higher voltage circuits.

END OF SECTION

JUNE 2026 16120-5 WIRES AND CABLES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 16140

SWITCHES AND RECEPTACLES

1.0 GENERAL

1.1 SECTION INCLUDES

1.1.1 This section describes materials and installation of light switches and receptacles.

1.2 QUALITY ASSURANCE

1.2.1 Comply with applicable portions of section 16010.

1.3 SUBMITTALS

1.3.1 Submit shop drawings and catalog data in accordance with Section 01300.

1.3.2 Submit material list for each type of switch, receptacle, and cover plate.

Indicate type, ratings, material, color, and manufacturer.

1.4 SPECIAL TOOLS AND SPARE PARTS

1.4.1 Provide spare parts recommended by the manufacturer.

1.5 PRODUCT DELIVERY, HANDLING AND STORAGE

1.5.1 Deliver, handle and store the equipment in accordance with the Special Provisions and the manufacturer’s recommendations.

1.6 RELATED WORK SPECIFIED ELSEWHERE

1.6.1 16010 – General Electrical Requirements

2.0 PRODUCTS

2.1 GENERAL

2.1.1 Provide switches and receptacles that are listed by Underwriter’s Laboratories, Inc.

2.2 RECEPTACLES

2.2.1 Provide corrosion-resistant receptacles, unless otherwise noted. Provide gray melamine, duplex receptacle, Hubbell HBL53CM 62 or equal.

2.2.2 Ground Fault Interrupter Duplex Receptacles: Receptacles shall be rated 20 amperes and comply with UL-943, Class A. Provide Leviton 6198-I, 3M GFI-2701, or equal.

2.2.3 Explosion-Proof Receptacles: Provide explosion-proof receptacles for areas identified as “Hazardous Area” or where receptacle is labeled “explosion proof.” Provide explosion-proof outlet of the cast malleable iron type with

JUNE 2026 16140-1 SWITCHES AND RECEPTICLES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project sealing chamber to house receptacle. Unit shall be of dead front design with spring-loaded cover utilizing receptacle outlet as indicated. Provide watertight self-adjusting matching plug capable of securely locking to outlet with no danger of being accidentally withdrawn. Receptacle outlet shall be activated only after plug is inserted and rotated manually. Receptacle shall

comply with NEC Class I, Division I, Groups F and G. Provide Appleton “U- Line” series, Crouse-Hinds ENR series, or equal.

2.3 SWITCHES

2.3.1 Switches shall be molded composition, brown, specification grade, single pole, three- way and four-way as shown on the drawings.

2.3.2 120 or 277 Volt Lighting: Provide switches rated 20 amperes, 120/277 volt AC. Provide quiet operation, toggle type switches.

2.3.3 Explosion-Proof Switches: Provide explosion-proof switches for areas identified as “Hazardous Area” in Section 16010. Provide factory-sealed tumbler switches, 20 amperes, 120/277-volt a-c. Comply with NEC Class I, Division I, Groups C and D and Class II, Division I, Groups E, F, and G.

Provide Appleton EDS series, Crouse-Hinds EDS series, or equal.

2.4 COVERPLATES

2.4.1 Outside, or where indicated, use individually gasketed weatherproof cover plates.

2.4.2 Provide satin stainless 302 plates in all remaining locations.

3.0 EXECUTION

3.1 FIELD TESTING

3.1.1 Operate each switch and verify that the load is turned on and off.

3.1.2 Test each receptacle with a circuit tester that checks voltage, polarity, and grounded conditions. Repair or replace defective receptacles and repeat the test.

3.2 GROUNDING

3.2.1 Provide a bonding jumper between the grounded outlet box and the receptacle ground terminal.

END OF SECTION

JUNE 2026 16140-2 SWITCHES AND RECEPTICLES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 16155

LOW VOLTAGE MOTOR CENTERS

1.0 GENERAL

1.1 SECTION INCLUDES

1.1.1 This section includes materials, installation, and testing of low-voltage motor control equipment.

1.2 QUALITY ASSURANCE

1.2.1 Comply with applicable portions of section 16010.

1.3 SUBMITTALS

1.3.1 Submit shop drawings in accordance with section 01300.

1.3.2 Submit manufacturer’s descriptive data including ratings, circuit diagrams, dimensional data, conduit entry restrictions, and overload relay ratings.

1.3.3 Submit Layout and Wiring Diagrams for new and modified motor control centers.

1.3.4 Provide Manufacturer’s Equipment Certification for motor controls and power monitors in accordance with section 01300.

1.3.5 Submit dimensional layout drawings and detailed wiring diagrams for installation of all motor controls and power monitors in existing equipment.

Contractor is responsible to verify all dimensions and equipment configuration, layout and wiring. Drawings shall include those of modified motor control centers and enclosures with power monitors, including installation of CTs and connection to existing power buses.

1.3.6 Submit Operations and Maintenance Manuals in accordance with section 01300.

1.3.7 Submit Manufacturer’s Certificate in accordance with Section 01300.

1.4 SPECIAL TOOLS AND SPARE PARTS

1.4.1 Spare Parts 1.4.1.1 The Contractor shall furnish to the representative of the Owner all necessary spare parts of components required to maintain the system. Prior to final acceptance of work, the system supplier shall provide a spare parts listing of all necessary spare parts and quantities for review of the representative of the Owner.

Minimum spare parts to be provided shall include:

a Ten (10) fuses of each type provided b Five (5) lamps of each type pilot light provided c One (1) current transformers of each type provided d One (1) circuit breaker of each current rating and type provided

JUNE 2026 16155-1 LOW VOLTAGE

MOTOR CENTERS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project e One (1) NEMA size motor starter of each rating and type provided f Twelve (12) Overload Element of each rating and type provided 1.4.2 Furnish one complete set of special tools required to disassemble, service, repair and adjust the equipment. Special tools are those that are not readily available through a commercial tool supplier.

1.5 PRODUCT DELIVERY, HANDLING AND STORAGE

1.5.1 Deliver, handle and store the equipment in accordance with the Special Provisions and the manufacturer’s recommendations.

1.6 RELATED WORK SPECIFIED ELSEWHERE

1.6.1 16010 – General Electrical Requirements 1.6.2 16011 – Coordination Study 1.6.3 16157 – Variable Frequency Drives 1.6.4 16160 – Panelboards 1.6.5 16460 – Transformers 1.6.6 16670 – Surge Suppression 1.6.7 16900 – General Control System Requirements

1.7 RATINGS

1.7.1 Motor horsepower ratings and enclosures shown are minimum expected.

This does not limit the equipment size. When motors and other equipment furnished differ from the minimum ratings indicated, make the necessary adjustments to wiring, conduit, disconnect devices, motor starters, branch circuit protection, and other affected material or equipment to accommodate the motors actually installed, at no additional cost to the Owner.

2.0 PRODUCTS

2.1 GENERAL

2.1.1 Motor Control Centers 2.1.1.1 Motor control centers shall be dead front, dead rear, floor standing, and front accessible NEMA 1 gasketed construction, except for sections with VFD and solid state controllers which shall be NEMA 1 construction. The voltage and ampere rating and physical dimensions shall be as indicated on the drawings.

Wiring shall be NEMA Class I, Type B. Tag control wiring from field within 2 inches of termination at each device and terminal board. Schematics shall also show terminal numbers and interior and field wire numbers. Obtain instrument wire numbers from instrument system supplier.

JUNE 2026 16155-2 LOW VOLTAGE

MOTOR CENTERS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.1.1.2 Provide channel iron sills and removable lifting angles. Motor control centers shall be constructed of minimum 14 gauge sheet metal.

2.1.1.3 Provide a separate vertical wiring compartment for each motor control center section. Provide cable supports and a hinged door separate from the unit starters.

2.1.1.4 Provide individual compartments separated by steel barriers and with separate hinged doors for each starter, circuit breaker, or other unit. Locate equipment to enable termination of field wiring from front without equipment removal. Motor control center shall have a 12 inch bottom wireway and a 6 inch top wireway.

2.1.1.5 Mechanically interlock starter and circuit breaker doors so doors cannot be opened with unit energized. Provide defeater mechanism to allow intentional access while starter or circuit breaker is energized. Provide provisions for padlocking external disconnect handles in the OFF position.

2.1.1.6 Bus bars shall be tin plated copper and braced to withstand minimum symmetrical short circuit current, as shown on drawings. Provide full horizontal bus rating for entire length of the motor control center. Do not taper the bus.

2.1.1.7 Provide a continuous, frontal accessible 300-ampere-minimum ground bus extended the full length of the motor control center.

2.1.1.8 Feeder circuit breakers shall be molded-case type and lockable in the on and off positions. Provide quick make and quick break toggle mechanism, inverse-time trip characteristics, and trip-free operation on overload or short circuit. Automatic tripping shall be indicated by a handle position between the manual OFF and ON position. Provide trip ratings and number of poles as indicated on the drawings. Provide breakers with fault current interrupting

ratings equal to or greater than the motor control center shortcircuit current rating. If necessary to comply with this provision, breakers shall be equipped with current-limiting fusing.

2.1.1.9 Main circuit breakers shall be as described above for feeder circuit breakers except without the inverse - time trip characteristics.

2.1.1.10 Combination starters shall be as described in “Combination Magnetic Motor Starters” in this section.

2.1.1.11 Each compartment shall have nameplates made from pneolic material with 1/4” white lettering on a black background, as specified in Section 16010.

2.1.1.12 Motor control centers shall comply with applicable NEMA, UL, and ANSI standards for industrial control.

2.1.1.13 Motor control centers shall be factory finished with ANSI 61 medium gray paint.

JUNE 2026 16155-3 LOW VOLTAGE

MOTOR CENTERS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.1.1.14 Provide rubber floor matting in front of each new motor control center section. Rubber matting to meet ASTM Designation:

D178-24 for electrical and physical requirements.

2.1.1.15 Verify that overall equipment dimensions are within the maximum dimensions indicated on the plans. If larger equipment is required, submit a proposed layout showing arrangement of electrical equipment. Provide working clearances in accordance with the NEC. Any costs due to rearrangement of equipment shall be borne by the Contractor with no additional expense to the Owner.

2.1.2 Combination Magnetic Motor Starters 2.1.2.1 Comply with NEMA ICS, Class A, and with NEC Article 430.

2.1.2.2 Combination motor starters shall be thermal trip circuit-breaker type, with ratings as noted on the drawings. If ratings are not shown on the drawings provide circuit breakers and motor starters as required by the NEC and as recommended by the manufacturer for the connected load. The short-circuit rating shall be equal to or greater than the bus bracing rating for the MCC as shown on drawings, but not less than 42,000 A for

enclosed or open-type combination starters. Where indicated short-circuit duty exceeds the starter’s rating, provide currentlimiting type breakers or circuit breakers with current limiters of type and rating required to comply with indicated main bus rating.

2.1.2.3 Provide motor starter overload relays for each motor starter. The overload shall be the same manufacturer as the motor starter and include a manual reset. The manufacturer shall verify the motor ratings and coordinate the overloads with the actual horsepower ratings of the motors installed.

2.1.2.4 Provide indicator lights, selector switches, push buttons, etc., as shown in the wiring diagrams and single line diagrams. Mount on the front panel of the control panel.

2.1.2.5 Provide externally operable overload relay reset buttons and disconnect operators.

2.1.2.6 Provide control relays within the starter enclosure as shown in the schematic wiring diagrams.

2.1.2.7 Control switches shall be round, heavy duty, oil tight type, 30.5mm complete with legend plates and quantity of contact blocks required for the control function.

2.1.2.8 Indicating lights shall be round, heavy duty, oil tight type, 30.5mm complete with color of lens indicated on drawings and legend plate. Lamps shall be 120-volt a-c. Indicating lights shall be LED cluster type with a life cycle of over 100,000 hours. Indicating lights shall be push-to-test type.

JUNE 2026 16155-4 LOW VOLTAGE

MOTOR CENTERS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.1.2.9 Elapsed time meters shall be synchronous motor driven, 0 to 99,999.9-hour range, non-reset type, suitable for semi-flush, panel mounting.

2.1.2.10 Starters and each unit compartment door shall have engraved nameplates made from black on white laminated plastic with 1/4” white lettering on a black background. Refer to Section 16010.

Attach nameplates with rivets. Nameplate descriptions shall have full names and approved as part of the shop drawing submittal.

2.1.2.11 Auxiliary contacts shall be provided as indicated on drawings, include a minimum of one spare normally open and one spare normally closed contact.

2.1.2.12 Provide terminal blocks in each starter where external controls or indicators are required. A schematic diagram shall be provided inside the cover of each starter. This diagram shall show terminal block identifications for each external connection.

2.1.2.13 Enclosed combination starters shall be panel mounted in an enclosure designated for the area. All panel devices shall have NEMA rating and type as required by Specification 16010.

2.1.2.14 Time-delay relays shall be UL listed with contacts rated 10- ampere noninductive load, 120 volts, with coil voltage, number of poles, pole arrangement, and maximum timing adjustment as indicated on the drawings. Relays with maximum timing adjustment 180 seconds or shorter shall be plug-in, solid-state type with timing knob adjustment. Provide Potter Brumfield, Square D Class 9050, Type FS, or equal.

2.1.2.15 Control devices shall be same as those specified in Section 16946.

2.1.2.16 In Class 1, Division 1 and Class 1, Division 2 hazardous locations provide combination or standalone starters in NEMA 7 enclosures.

2.1.3 Manual Motor Starters 2.1.3.1 Provide number of poles and size of thermal overload heaters for the motor being controlled. All panel devices shall have NEMA rating and type as required by Specification 16010.

2.1.3.2 Starters shall have provisions for padlocking in the off position and shall be UL listed.

2.1.3.3 Starters shall be the heavy-duty type with toggle or push button operation. Arrow Hart Type LL, Allen-Bradley Bulletin 609, or equal.

2.1.3.4 In Class 1, Division 1 and Class 1, Division 2 hazardous locations provide manual motor starters in NEMA 7 enclosures.

JUNE 2026 16155-5 LOW VOLTAGE

MOTOR CENTERS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.1.4 Surge Protection 2.1.4.1 Provide surge protection as shown on the drawings for motor control centers. (Refer to Section 16670.) 2.1.5 Power Monitor (PM) 2.1.5.1 Power Monitor (PM) shall be a panel-mounted, 3-phase microprocessor based monitoring device that provides complete electrical metering, displaying and remote monitoring of electrical

parameters as listed herein and as shown on the drawings.

2.1.5.2 The PM shall be UL listed. The PM shall support 3 and 4 wire Wye, 3 wire Delta and single-phase systems as shown on the Drawings and as specified herein. The PM shall accept input from standard 5A secondary instrument transformers.

2.1.5.3 Voltage monitoring range shall be up to 300 VAC phase-to-phase for 120/208 volt system or 300 VAC phase-to-neutral and 600 VAC phase-to-phase for 277/480 volt system.

2.1.5.4 PM shall measure True RMS voltage, phase-to-phase, phase-toneutral, current per phase and neutral, real power, reactive power, and power factor. PM shall monitor total accumulated energy, total accumulated reactive energy and total apparent energy.

2.1.5.5 PM shall calculate average, max/min demand values for all readings. A time/date stamp must be recorded when a max or min is detected.

2.1.5.6 The accuracy shall be a minimum ±0.2% of full scale for current and voltage readings and ±0.4% for power, energy and ±1.0% for power factor readings. Accuracy shall be maintained from 10 to 115% of nominal for voltage, 3 to 140% of nominal for current and from –0.50 to 1.00 to +0.50 power factor. The resolution for current, voltage and power parameters shall be 0.1% and for power factor 1.0%.

2.1.5.7 The PM display shall have a standard switchboard instrument size footprint with mounting per ANSI C39.1. Where PMs are installed in existing switchboards and motor control centers, new mounting plates shall be furnished and installed with coating to match existing panel finish. The PM shall have high intensity L.E.D.s or LCD of at least 5/16-inch height letters. Displayed power measurements shall include Volts, Amps, Watts, VARs,

KWH and Power Factor. The totalized power readings shall be displayed in Five-digit resolution minimum. Provide a listing of the register locations in the PM where the collected data is accessible, via the communication port.

2.1.5.8 The power monitors shall have the following characteristics:

a Current Input Range (for each channel)…5A at full scale b Overload withstand……………surge 10X for 3 seconds

JUNE 2026 16155-6 LOW VOLTAGE

MOTOR CENTERS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project c Surge withstanding……………………per IEEE C37.90.1 d Frequency Range………………0-75Hz, 60Hz – Nominal e Temperature…………………………………-4F to 150F 2.1.5.9 Fused potential transformers shall be incorporated into the Monitoring system. Provide split core window type, current transformers, fuses, disconnects, lugs, wiring, potential taps and accessories with ratios suitable for service voltage and current

rating of system being monitored. Current transformers shall be capable of carrying full load continuous primary current without damage to transformer insulation. Voltage and current transducers shall be self-powered, solid state device, AC input, DC output insensitive to load variations from 0 up to 19,000 ohm;

with multiturn adjustable potentiometer accessible through a siding access port providing a 0-1 mA DC output. Transducers shall be Scientific Columbus Model VT110A2 (voltage) and CT510A2 (current), or equal.

2.1.5.10 Power monitor shall communicate through Allen Bradley TCP Ethernet Communications to the Contrologix PLC for gathering data.

2.1.5.11 All current transformers, control transformers, fusing, disconnects, installation, wiring, identification of space in the equipment, MCC buckets and doors, new enclosures, and coordination with the existing MCC and switchboard manufacturers shall be performed by the Contractor.

2.2 MANUFACTURERS

2.2.1 Motor control center shall be manufactured by General Electric, Allen Bradley, Siemens, Eaton or equal.

2.2.2 Power monitor shall be Allen Bradley, Model PM3000 with accessories as noted.

2.3 DESIGN CONDITIONS

2.3.1 As required in Section.

3.0 EXECUTION

3.1 INSTALLATION

3.1.1 Motor Control Centers shall be shipped to the site in one continuous section with all bus connections and line side power wiring to the compartments complete, if possible for the installation. In the event the Motor Control Center is to be disassembled, or shipped in sections, for installation in a building or area, a representative from the Motor Control Center manufacturer shall perform the reassembly of the MCC bus and internal

power connections. The Contractor shall not perform this work.The drawings diagrammatically indicate the desired location and arrangement of outlets, conduit runs, equipment, and other items. Field determine exact locations

JUNE 2026 16155-7 LOW VOLTAGE

MOTOR CENTERS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project based on physical size and arrangement of equipment, finished elevations, and obstructions.

3.1.2 Secure motor control enclosures rigidly to floors or mounting pads with 316 stainless steel anchor bolts or concrete wedge anchors. Provide new concrete housekeeping pads for all motor control centers, or extend existing pads as required for new motor control centers.

3.1.3 Install motor controls at locations as shown on the drawings. The Contractor shall provide and install all terminations, hubs, connectors, and conduit fittings required for connection of new conduit and wiring to the motor controllers and motor control center. Provide wire identification for all wiring.

3.1.4 For motor control equipment which is installed in existing cabinets or motor control centers provide new doors, buckets, operating mechanisms, control transformers and other required equipment.

3.1.5 Install power monitors in new and existing motor control centers, switchboards, and other enclosures at locations shown on the drawings.

Verify locations prior to installation. Connections to existing buses, wiring, and equipment shall be performed using electrical lugs approved for the installation, splicing of wiring is not permitted. Contractor shall provide all lugs and connectors required for power monitor current and voltage connections. Wiring and equipment shall be protected as required by the NEC.

3.2 MANUFACTURER’S SERVICES

3.2.1 Provide equipment manufacturer’s services at the jobsite for the minimum man-days listed below, travel time excluded:

3.2.1.1 Five man-days to check the installation, supervise start up, and supervise testing of each MCC for each process area to be energized.

3.2.1.2 One man-day to instruct the Owner’s personnel in the operation and maintenance of the equipment, at the site during a time approved by the Owner.

3.3 FIELD COATINGS

3.3.1 None required.

3.4 FIELD TESTING

3.4.1 Test the operation of each interlock and control circuit to verify that the interlock performs its function.

3.4.2 Set adjustable trip circuit breakers two settings above the setting that causes the breaker to trip during motor starting. Do not adjust the setting above 1,300% of the motor nameplate current rating.

3.4.3 Set protective relaying, main and feeder circuit breaker adjustable set points, and time delays in accordance with the manufacturer’s recommended values.

JUNE 2026 16155-8 LOW VOLTAGE

MOTOR CENTERS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.4.4 Test operation of power monitoring unit and set all parameters for this application. Provide coordination with the system supplier for connection of the equipment to the PCS and PLC hardware. Testing shall include transfer of data between the power monitor and the new programmable logic controller installed in the control room. Refer to Section 16900.

3.4.5 Perform complete testing in accordance with Section 01650.

3.4.6 Infrared testing shall be performed on all Motor Control Centers and Motor Control Devices in accordance with Specification Section 16010.

3.5 TRAINING

3.5.1 Provide at least two - 8 hour days to instruct the representative of the Owner and Engineer.

3.5.2 The training shall include the following:

3.5.2.1 General electrical operation and maintenance of the MCC and its associated devices such as circuit breaker, starters, power monitor, and accessories.

3.5.2.2 Power Monitor configuration/programming, operation, and troubleshooting.

END OF SECTION

JUNE 2026 16155-9 LOW VOLTAGE

MOTOR CENTERS

Sudlersville Wastewater Treatment Plant ENR Improvement Project

SECTION 16157

VARIABLE FREQUENCY DRIVES

1.0 GENERAL

1.1 SECTION INCLUDES

1.1.1 This section describes materials, testing and installation of variable frequency drives (VFDs). The application will utilize a variable torque VFD rated for the specified horsepower.

1.2 QUALITY ASSURANCE

1.2.1 Comply with applicable portions of section 16010.

1.3 SUBMITTALS

1.3.1 Submit shop drawings and catalog data in accordance with section 01200.

1.3.2 Submit shall include the following:

1.3.2.1 Manufacturer’s descriptive data including ratings, circuit diagrams, dimensional data, conduit entry restrictions, and heat dissipation to ambient. Clearly identify part number of the equipment to be provided.

1.3.2.2 Layout and Wiring Diagrams.

1.3.2.3 Submit dimensional layout drawings and detailed wiring diagrams for installation of variable frequency drives in existing equipment. Contractor is responsible to verify all dimensions and equipment configuration, layout and wiring.

1.3.2.4 Submit a report with all parameters set at each VFD. The report shall include as a minimum the following data per each parameter: ID, Name, description, value, default, unit, minimum value, and maximum value.

1.3.3 Submit Manufacturer’s Equipment Certification in accordance with 01200.

1.3.4 Submit Manufacturer’s Certificate in accordance with 01200.

1.3.5 Submit Operation and Maintenance Manuals in accordance with 01200.

Include the following:

1.3.5.1 Programming/Parameter – User Manual 1.3.5.2 Final VFD parameter setting in an electronic file. The file can be used by the Owner to download the drive configuration at the field. Provide the associated configuration software to be installed in a laptop computer for parameter visualization.

1.4 SPECIAL TOOLS AND SPARE PARTS

1.4.1 Provide one complete VFD unit, as specified herein, less the enclosure.

Deliver to locations as requested by the Owner

1.5 PRODUCT DELIVERY, HANDLING AND STORAGE

JUNE 2026 16157-1 VARIABLE FREQUENCY DRIVES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 1.5.1 Deliver, handle and store the equipment in accordance with the Special Provisions and the manufacturer’s recommendations.

1.6 RELATED WORK SPECIFIED ELSEWHERE

1.6.1 General Electrical Requirements: 16010 1.6.2 Low voltage motor control: 16155 1.6.3 General Control System Requirements: 16900

2.0 PRODUCTS

2.1 GENERAL

2.1.1 Variable frequency drives shall consist of variable frequency controllers, bypass starters, as indicated, and controls. Each drive shall operate as a simplex unit with no interaction with other drives. Horsepower rating of each drive shall be sufficient to drive the motor as shown on the drawings under the specified operating conditions.

2.1.2 Design equipment to operate under the following conditions:

2.1.2.1 Altitude to 3,300 feet above sea level.

2.1.2.2 Ambient 10 C to 40 C.

2.1.2.3 Noncondensing relative humidity to 95%.

MARCH 2026 16157-2 VARIABLE FREQUENCY

DRIVES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.1.3 Equipment shall comply with the requirements of ANSI, IEEE, and NEMA.

The electrical equipment, design, and construction shall comply with the provisions of the NEC.

2.1.4 The complete VFD assembly shall be “Integrally Equipment Rated” in accordance with UL requirements and shall be suitable for connection of a minimum available fault of 42,000 RMS symmetrical amperes. The VFD circuit breaker shall conform to Specification 16155 for feeder circuit breakers.

2.1.5 The pump and blower manufacturer shall be responsible for the coordination of the VFD operation with the specific pump and motor requirements.

2.1.6 Variable frequency drives shall be manufactured by Allen Bradley Model 750 or equal.

2.1.7 The VFD shall comply with IEEE 519-1922 for Harmonic Currents and voltage distortion limits for this application, It is the Contractor’s responsibility to provide adequate equipment, including but not limited to input isolation transformers, input line reactors, DC bus reactors and harmonic filters, as required. The maximum Short Circuit Current (ISC) versus maximum Demand Load Current (IL) ratio (ISC/IL) is less than 20

for this facility. The total demand distortion at the point of common coupling (main switchgear) allowed for this application is 5%.

2.2 ENCLOSURES

2.2.1 As indicated on the drawings, provide and install a separate enclosure for each variable frequency drives, or provide the drives in the Motor Control Center sections.

2.2.2 Verify that overall equipment dimensions are within the maximum dimensions indicated on the plans. If larger equipment is required, submit a proposed room layout showing arrangement of electrical equipment.

Provide working clearances in accordance with the NEC. Any costs due to rearrangement of equipment shall be borne by the Contractor with no additional expense to the Owner.

2.2.3 Enclosure shall be floor standing, completely front accessible, ventilated NEMA 1 gasketed. Enclosures shall be suitable for mounting against a wall or back-to-back with other equipment.

2.2.4 Provide fan cooling for all VFD cabinets. Maximum temperature inside cabinet shall be less than 95°F. All components, and wiring inside the enclosure for the fan cooling shall be provided by the manufacturer.

Provide a 480:120 volt transformer to power the fan.

2.3 VARIABLE FREQUENCY CONTROLLERS

MARCH 2026 16157-3 VARIABLE FREQUENCY

DRIVES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.3.1 Controller shall consist of a power conversion bridge and inverter.

2.3.2 Controller shall be pulse width modulated (PWM) design.

2.3.3 Controller shall be variable voltage/variable frequency (constant volts per hertz).

2.3.4 The controller shall include the following features:

2.3.4.1 460-volt a-c, 3-phase, 3 wire, 60-Hz input power.

2.3.4.2 460 volt a-c, 3-phase, 3-wire, ungrounded output power.

2.3.4.3 Input fusing, fast acting.

2.3.4.4 Input power surge protector, for transient protection up to 10 KV and 250 Joules. (Refer to Section 16670.) 2.3.4.5 0 to 650 Hz continuous operating range with 0.01 Hz frequency resolution.

2.3.4.6 Output current limit, 0% to 250% adjustable, minimum. Limits motor inrush current during startup.

2.3.4.7 Regulation +/-3% of base speed.

2.3.4.8 Adjustable acceleration and deceleration rates.

2.3.4.9 Maximum and minimum speed adjustments.

2.3.4.10 Frequency skip adjustment (3 minimum).

2.3.4.11 115-volt a-c control power for run/stop circuits.

2.3.4.12 Blower cooled with thermal switch cutout and filters for all intake and exhaust openings.

2.3.4.13 Minimum 5% line reactor on input of VFD 2.3.4.14 Line reactor on VFD output for motor leads greater than 100 feet in length.

2.3.5 The controller shall include protective circuitry that initiates an orderly shutdown of the inverter without component failure. The controller shall shut down and require manual reset for the following fault conditions.

2.3.5.1 Overload 2.3.5.2 Instantaneous overcurrent 2.3.5.3 Inverter fault 2.3.5.4 Over frequency 2.3.5.5 D-C link overvoltage 2.3.5.6 Cabinet overtemperature

MARCH 2026 16157-4 VARIABLE FREQUENCY

DRIVES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.3.6 The controller shall shut down for the following fault conditions. The controller shall automatically restart upon a cleared fault condition.

2.3.6.1 Incorrect phase sequence 2.3.6.2 Loss of an input phase 2.3.6.3 Input undervoltage 2.3.7 Provide a common failure contact for remote indication of fault conditions previously listed.

2.3.8 The VFDs for the chemical feed pumps shall be compatible with the chemical feed pump motors/pumps.

2.3.8.1 VFDs for the chemical feed pumps shall be Sensorless Vector type

2.4 CONTROLS

2.4.1 The following data shall be accessible via a digital display mounted on the control cabinet door, and interfaced to the variable frequency drive.

2.4.1.1 Control power on.

2.4.1.2 Drive run.

2.4.1.3 Drive fault.

2.4.1.4 Drive speed indication, 0% to 100% rpm and

0-60 Hz.

2.4.1.5 Elapsed time meter, six digits, reading in hours and tenths.

2.4.1.6 Drive output current and voltage.

2.4.1.7 Manual speed adjustment, 0% to 100% rpm and

0-60 Hz.

2.4.1.8 Drive, start/stop (local mode).

2.4.1.9 As indicated on the drawings.

2.4.2 The following operation shall be provided.

2.4.2.1 With system mode in AUTOMATIC, the motor shall automatically vary in speed proportional to an ungrounded 4- to 20-mA input signal from the PLC.

2.4.2.2 With system mode in HAND, the motor shall vary in speed in response to the manual speed adjustment.

MARCH 2026 16157-5 VARIABLE FREQUENCY

DRIVES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.4.3 Drive shall have automatic restart following a power failure.

2.4.4 Provide minimum five digital inputs, two relay output contacts, and one 4- 20 mA analog input. The digital input and relay output shall be programmable. The analog input shall increase the VFD output proportional to the signal.

2.4.5 The VFD shall be capable of setting a minimum speed for operation. This setting shall be configured by the Contractor during system testing and startup, with a value indicative of the system hydraulics and operation.

2.4.6 The VFD shall be configured to ramp to a preset speed when an input is energized in the VFD. The preset speed setting shall be configured by the Contractor during system testing and startup, with a value indicative of the system hydraulics and operation.

2.4.7 Provide pilot devices which meet the requirements specified in Section 16155.2.2.

2.5 FACTORY TESTING

2.5.1 Subject the variable frequency drives to a rated motor load operational test prior to shipment. Provide written certification of completed and approved factory test.

2.6 SOFTWARE

2.6.1 Provide all configuration software and cables for connection of each type of drive to a laptop computer for setting the drive parameters. The software shall operate on Windows operating system. Provide all cabling and accessories for direct connection to a Laptop. A manufacturer’s representative shall configure all drive parameters to operate as specified.

The software and license will then be provided to the Owner after project completion. The software shall be licensed to Queen Anne’s County Sanitary District.

3.0 EXECUTION

3.1 INSTALLATION

3.1.1 Drives shall be installed in enclosures at locations as shown on the drawings. Mount drive with the recommended clearances per the manufacturer and local codes.

3.1.2 Secure drive enclosure to floor, wall or install MCC with stainless steel hardware. Provide access of digital display on front of drive.

3.2 MANUFACTURER’S SERVICES

MARCH 2026 16157-6 VARIABLE FREQUENCY

DRIVES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.2.1 Provide equipment manufacturer’s services at the jobsite for the minimum man-days listed below, travel time excluded:

3.2.1.1 One man-day per VFD installed to check the installation, calibrate the drives, supervise start up, and supervise testing of the drives for each process area to be energized.

3.2.1.2 One man-day to instruct the Owner’s personnel in the operation and maintenance of the equipment, at the site during a time approved by the Owner.

3.3 FIELD TESTING

3.3.1 Test the operation of each interlock to verify that the interlock performs its function.

3.3.2 The variable speed drive system shall be tested to check correct operation of each drive in the manual variable speed mode and automatic variable speed mode.

3.3.3 Test the total demand distortion and odd harmonic distortion of the system at the point of common coupling. The Contractor shall provide all equipment required to test the system. A certified test report shall be submitted by the Contractor for review and approval by the Owner. If the maximum harmonic limits, as required by IEEE 519-1992, for this application, are not satisfied the Contractor shall include additional

equipment to meet these requirements at no additional cost to the Owner.

3.4 FACTORY TRAINING

3.4.1 The contractor shall provide a factory-training course to a minimum of four Owner personnel. The training shall include, as a minimum, the following:

3.4.1.1 Theory of Operation 3.4.1.2 Maintenance 3.4.1.3 Overhaul Instructions 3.4.1.4 Troubleshooting Techniques 3.4.1.5 Programming/Configuration 3.4.2 The training shall be performed by a qualified factory representative at a location within a 50-mile radius of the site, and be a minimum of two mandays, for a maximum of six Owner personnel.

3.5 TRAINING

3.5.1 Provide at least two-8 hour days to instruct the representative of the Owner and Engineer.

3.6 The training shall include the following:

MARCH 2026 16157-7 VARIABLE FREQUENCY

DRIVES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.6.1 Operation and maintenance of the drive and its accessories.

3.6.2 Configuration and troubleshooting.

END OF SECTION

MARCH 2026 16157-8 VARIABLE FREQUENCY

DRIVES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 16160

PANELBOARDS

1.0 GENERAL

1.1 SECTION INCLUDES

1.1.1 This section describes materials, testing, and installation of panelboards.

1.2 QUALITY ASSURANCE

1.2.1 Comply with applicable portions of 16010.

1.3 SUBMITTALS

1.3.1 Submit Shop’s Drawings in accordance with section 01300.

1.3.2 Show ratings and characteristics including voltage ratings, bussing arrangement, continuous current ratings, fault current withstand ratings, neutral bus rating, enclosure type, ratings and arrangement of over-current protective devices, and mounting provisions.

1.3.3 Submit outline and dimensional drawings and conduit entry restrictions.

1.3.4 Submit Operation and Maintenance Manuals in accordance with section 01300.

1.4 SPECIAL TOOLS AND SPARE PARTS

1.4.1 Provide spare parts recommended by the manufacturer. At a minimum, provide one (1) complete set of the following:

1.4.1.1 Furnish one complete set of special tools required to disassemble, service, repair and adjust the equipment. Special tools are those that are not readily available through a commercial tool supplier.

1.5 PRODUCT DELIVERY, HANDLING AND STORAGE

1.5.1 Deliver, handle and store the equipment in accordance with the Special Provisions and the manufacturer’s recommendations.

1.6 RELATED WORK SPECIFIED ELSEWHERE

1.6.1 16010 – General Electrical Requirements 1.6.2 16670 – Surge Suppression

2.0 PRODUCTS

2.1 LOW-VOLTAGE PANEL BOARD

2.1.1 Provide dead front, safety-type panelboards with voltage ratings as scheduled. Panelboards shall be circuit breaker type and suitable for a

JUNE 2026 16160-1 PANELBOARDS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project minimum short circuit rating of 25,000 AICS, unless otherwise indicated on the drawings.

2.2 CABINETS

2.2.1 Install panelboard in a flush mount cabinet, or in motor control centers, as shown on the drawings with hinged front doors, catches, and locks. Provide holder for the directory on the inside of the door.

2.3 BREAKERS

2.3.1 Molded-case breakers.

2.3.1.1 Provide quick-make and quick-break toggle mechanism, inversetime trip characteristics, and trip-free operation on overload or short circuit. Automatic tripping shall be indicated by a handle position between the manual OFF and ON position. Provide trip ratings as indicated in the panelboard. Provide lock-on or lock-off devices where indicated on the drawings.

2.3.1.2 Single-pole breakers shall be full module size; two poles shall not be installed in a single module. Multiple circuit breakers shall be of the common-trip type having a single operating handle.

2.3.1.3 For existing panelboards provide circuit breakers with same characteristics as is existing, with ratings as shown on the drawings, or as required by NEC.

2.3.1.4 Circuit breakers minimum interrupting current rating shall be 22,000 AICS, minimum. Provide breakers with same interrupting current as panelboard if panelboard rating is greater than 22,000 AICS.

2.4 BREAKER CONNECTIONS

2.4.1 Circuit breaker current-carrying connections to the bus shall be bolted type.

2.5 BUS BARS

2.5.1 Bus bars shall be copper. Provide a copper ground bus bar installed on the panelboard frame, bonded to the box, and containing at least 10 terminal screws.

2.6 SPACE ONLY

2.6.1 Where “space only” is noted on the drawings, provide connectors, mounting brackets, etc., for the future insertion of an overcurrent device of the size indicated.

2.7 DIRECTORIES

2.7.1 Provide typed circuit directories on the inside face of the door of each panel on medium weight card stock. Do not provide handwritten directories.

2.8 NAMEPLATES

JUNE 2026 16160-2 PANELBOARDS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.8.1 Provide nameplates as specified in Section 16010. Designate the identifying nomenclature, voltage and phase of the panel as shown on the drawing; for example, “PANEL A, 208Y/120V, 3-phase, 4-wire, 100-ampere bus.”

2.9 SURGE PROTECTION

2.9.1 Provide surge protection at panelboards, as indicated on the drawings.

Provide all circuit breakers, wiring, and equipment required for surge protection.

2.10 ENCLOSURES

2.10.1 For circuit breakers and panelboards in standalone enclosures, provide NEMA rated enclosure as indicated in specification Section 16010.

3.0 EXECUTION

3.1 INSTALLATION

3.1.1 Mount the panelboard in locations as shown on the drawings.

3.1.2 For wall mounting, secure panelboards with stainless steel hardware and ¼” spacing behind panel.

3.1.3 Install circuit breakers in existing panelboards as shown on the drawings.

3.1.4 Install surge protection as indicated on the drawings and refer to Section 16670.

3.2 FIELD TESTING

3.2.1 Operate each circuit breaker and verify that all phases of each load are disconnected.

END OF SECTION

JUNE 2026 16160-3 PANELBOARDS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 16450

GROUNDING

1.0 GENERAL

1.1 SECTION INCLUDES

1.1.1 This section includes materials, testing, and installation of electrical grounding. Methanol system grounding shall meet all requirements of Methanol Equipment manufacturers and NFPA 780.

1.2 QUALITY ASSURANCE

1.2.1 Comply with applicable portions of section 16010.

1.3 SUBMITTALS

1.3.1 Submit shop drawings and catalog data in accordance with section 01300.

1.3.2 Submit material list for all grounding materials and equipment. Indicate size, material, and manufacturer.

1.3.3 Submit Operation and Maintenance Manual in accordance with section 01300.

1.4 SPECIAL TOOLS AND SPARE PARTS

1.4.1 Provide spare parts recommended by the manufacturer.

1.5 PRODUCT DELIVERY, HANDLING AND STORAGE

1.5.1 Deliver, handle and store the equipment in accordance with the Special Provisions and the manufacturer’s recommendations.

1.6 RELATED WORK SPECIFIED ELSEWHERE

1.6.1 16010 – General Electrical Requirements

2.0 PRODUCTS

2.1 GROUND RODS

2.1.1 Ground rods shall be copper-clad steel, 3/4 inch diameter, minimum 10 feet long, with hardened steel points.

2.2 GROUND CLAMPS

2.2.1 Ground clamps shall be bronze.

2.3 GROUND RESISTANCE TESTER

2.3.1 The ground resistance tester shall be an instrument specifically designed for ground resistance testing.

JUNE 2026 16450-1 GROUNDING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

2.4 STATIC GROUND REEL

2.4.1 Static ground reel shall be provided for use at the methanol storage tank.

2.4.2 Reel shall have 50-foot grounding cable with 100 AMP rated clamp and spring rewind. Cable shall be single 7x7 stranded steel, with 3/32" OD. Reel shall be made of industrial grade carbon steel.

2.4.3 Static Ground Reel shall be model G 3050 by Reelcraft, or approved equal.

2.4.4 Reel shall be ground mounted as shown on the Contract Drawings.

3.0 EXECUTION

3.1 MANUFACTURER’S SERVICES

3.1.1 Comply with section 01200 for Service of Manufacturer’s Representative.

3.1.2 The Contractor shall refer to the special provisions and individual specification sections for the requirements of the manufacturer services for all equipment provided in Division 16 of the Contract Documents. The services indicated in the special provisions shall be in addition to those indicated in the specification sections.

3.2 FIELD COATINGS

3.2.1 Section not used.

3.3 FIELD TESTING

3.3.1 Before making connections to the ground electrode, measure the resistance of the electrode to ground using a ground resistance tester. Perform the test not less than two days after the most recent rainfall, and in the afternoon after any ground condensation (dew) has evaporated. If a resistance of 5 ohms or less is not obtained, provide ground rods driven 6 inches below grade and connect to ground test well with No. 4/0 AWG bare copper wire

and repeat the test. If the resistance is still above 5 ohms, inform the Owner.

3.3.1.1 Contractor shall specifically test the ground connection to the structural steel at the methanol feed station shown on the drawings to demonstrate that the ground reel called out in this specification section is properly grounded.

3.3.1.2 Contractor shall specifically test the ground connection to the methanol storage tank at the methanol feed station shown on the drawings to demonstrate that the methanol storage tank is properly grounded.

3.4 GROUND ELECTRODE

3.4.1 Install a bare copper ground loop for all new structures and as shown on the drawings. Bring the loop to the ground at the motors, distribution transformers, ground main service disconnect bus, or motor control centers.

Buried or concealed joints or terminations are not permitted. Protect wires

JUNE 2026 16450-2 GROUNDING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project with rigid steel conduit where wires stub up through slab at motor control center.

3.4.2 Install ground rods 6” below grade at each corner of new structures. Connect to ground loop with exothermic weld.

3.4.3 Equipment Grounding 3.4.3.1 Connect the ground buses of the distribution transformer to the ground bus within the panel with a grounding conductor.

3.4.3.2 Ground raceways and noncurrent carrying parts of electrical equipment in accordance with NEC Article 250. Use the metallic conduit system for equipment and enclosure grounding.

Grounding through the conduit system shall be in excess of any ground conductors shown on the drawings.

3.4.3.3 Circuits in all conduits shall carry one ground conductor for equipment grounding.

3.4.3.4 All above ground metallic equipment shall be effectively bonded to the earth ground electrode system, i.e., stairways, handrails, ladders, elevated platform motors.

3.4.4 Provide #4 AWG bare copper grounding conductors to all motor bases, connect to ground loop.

END OF SECTION

JUNE 2026 16450-3 GROUNDING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

JUNE 2026 16450-4 GROUNDING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 16460

DRY TYPE TRANSFORMERS

1.0 GENERAL

1.1 SECTION INCLUDES

1.1.1 This section includes materials and installation of low-voltage (600V or less) transformers.

1.2 QUALITY ASSURANCE

1.2.1 Comply with applicable portions of section 16010.

1.3 SUBMITTALS

1.3.1 Submit shop drawings and catalog data in accordance with section 01300.

1.3.2 Submit ratings and characteristics including voltage, phases, connections, enclosure type and dimensions, and conduit entry restrictions.

1.4 SPECIAL TOOLS AND SPARE PARTS

1.4.1 Provide spare parts recommended by the manufacturer.

1.5 PRODUCT DELIVERY, HANDLING AND STORAGE

1.5.1 Deliver, handle and store the equipment in accordance with the Special Provisions and the manufacturer’s recommendations. Additionally:

1.5.1.1 All equipment shall be stored in dry locations and outside any type of corrosive environment.

1.6 RELATED WORK SPECIFIED ELSEWHERE

1.6.1 16010 – General Electrical Requirements 1.6.2 16155 – Low Voltage Motor Control 1.6.3 16160 – Panelboards

2.0 PRODUCTS

2.1 GENERAL

2.1.1 KVA size, voltage, and phase of the transformers are indicated on the drawings.

2.1.2 Transformers to be UL listed and labeled where listing applies.

2.1.3 Transformers shall be rated for continuous operation in a 40C maximum ambient temperature.

2.2 DRY-TYPE TRANSFORMERS (25 KVA AND BELOW)

JUNE 2026 16460-1 DRY TYPE TRANSFORMERS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.2.1 Construct transformers in accordance with ANSI C89.2, NEMA ST-20, and UL listed under the requirements of Standard 506.

2.2.2 Transformers 5 KVA and larger shall have two 5% FCBN taps on the primary side.

2.2.3 Transformers rated 250 VA and below shall have 55C rise, 105C insulation system. Transformers rated 0.5 KVA through 25 KVA shall have 115C rise, 180 C insulation system.

2.2.4 Encapsulate core and coil in an insulating resin of the class equal to the temperature rise. They shall be embedded in a resin and filler system to attenuate the sound level.

2.2.5 Transformers shall be Sorgel Electric Division Square D Company; “Quiet Quality”-General Electric Company “QB, ML, QMS,” Westinghouse “EP or EPT,” or equal.

2.3 DRY-TYPE TRANSFORMERS (30 KVA AND ABOVE)

2.3.1 Construct transformers in accordance with ANSI C89.2, NEMA TR-27, NEMA ST-20, and UL listed under the requirements of Standard 506.

2.3.2 Transformers shall have two 2-/2 FCAN and FCBN taps on the primary side.

2.3.3 Transformers shall have 150 C rise, 220 C insulation system.

2.3.4 Sound levels shall be within the requirements of ANSI C89.1-2.7.2 2.3.5 Transformers shall be ventilated type.

2.3.6 Transformers shall be Square D Company “Quiet Quality,” General Electric Company “QL,” or equal.

3.0 EXECUTION

3.1 INSTALLATION

3.1.1 Set taps under load conditions for correct voltages as shown on the drawings.

3.1.2 Install transformers such that no metal-to-metal, concrete, plaster, or wood contact exists between the transformer and structural members.

3.1.3 Install transformer on equipment pads control panels or motor control centers in locations as indicated on drawings.

3.2 MANUFACTURER’S SERVICES

3.2.1 Comply with section 01200 for Service of Manufacturer’s Representative.

3.2.2 The Contractor shall refer to the special provisions and individual specification sections for the requirements of the manufacturer services for all equipment provided in Division 16 of the Contract Documents. The services indicated in the special provisions shall be in addition to those indicated in the specification sections.

JUNE 2026 16460-2 DRY TYPE TRANSFORMERS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

3.3 FIELD TESTING

3.3.1 Transformers shall have insulation resistance tests made on the windings prior to being connected. The measurements shall be from primary and secondary windings to ground and between primary and secondary windings. The minimum value shall be 10 megohms.

3.3.2 Demonstrate secondary voltage is within 5% of rated voltage at full and no load conditions.

END OF SECTION

JUNE 2026 16460-3 DRY TYPE TRANSFORMERS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 16500

LIGHTING

1.0 GENERAL

1.1 DESCRIPTION

1.1.1 This section includes materials and installation of lighting fixtures as indicated in accordance with Contract Documents.

1.2 SUBMITTALS

1.2.1 Submit shop drawings in accordance with Section 01300 and as follows:

1.2.1.1 Manufacturers catalog data including complete catalog number, photometric data, and descriptive literature.

2.0 MATERIALS

2.1 GENERAL

2.1.1 Furnish lighting fixtures of the type indicated on the drawings, complete with lamps, sockets, wiring, and mounting hardware.

2.1.2 The use of a manufacturer’s name and model or catalog number in the drawings is for the purpose of establishing the standard of quality, photometrics, and general appearance desired only.

Products of other manufacturers will be considered in accordance with the General Provisions.

2.2 LAMPS

2.2.1 Light- Emitting Diode (LED) 2.2.1.1 Provide LED lamps and drivers as indicated on the lighting schedule.

2.2.2 Manufacturers 2.2.2.1 Cooper Crouse-Hinds, General Electric, Sylvania, Westinghouse, or equal.

2.3 LIGHT- EMITTING DIODES DRIVERS

2.3.1 Light- Emitting Diodes:

2.3.1.1 Luminaires containing lighting-emitting diodes at 4k Kelvin supplied with manufactures drivers shall be used as specified on the drawings lighting schedule unless otherwise noted.

2.3.1.2 Manufacturers: General Electric, Jefferson, Universal, or equal.

2.4 FIXTURE TYPES

2.4.1 Refer to lighting schedule on drawings for fixture type.

JUNE 2026 16500-1 LIGHTING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

2.5 POLES

2.5.1 Pole shaft shall consist of round extruded 6063-T6 aluminum alloy with finish to match fixture. Height of pole shall be as shown on the lighting schedule in the drawings.

2.5.2 Design poles, including handholes and luminaries, for a minimum yield safety factory of 1.5 when subjected to a sustained wind velocity of 100 MPH and wind gusts of 130 MPH. In addition, limit the deflection to 5% of pole length under these conditions.

2.5.3 Equip with handhole of sufficient size to permit the pulling and splicing of wires and grounding of the pole. Provide a grounding lug accessible through the handhole to accept a ½-inch-diameter copper conductor. Equip handhole with a cover.

2.5.4 Mount weatherproof in locations shown on drawings.

3.0 EXECUTION

3.1 INSTALLATION

3.1.1 Install lighting fixtures as close as possible to the locations shown on the drawings, making adjustments only for the purpose of avoiding interferences.

3.1.2 Install lighting fixtures plumb and level, with fixture surfaces parallel and perpendicular to walls and other major structures.

3.1.3 Install continuous rows of fixtures straight and true and equip with necessary parts, such as joining straps, couplings, and nipples.

3.1.4 Support fluorescent lighting fixtures at two points minimum from structural elements which are capable of carrying the total weight.

Mount fixtures rigidly with no rocking action. Where fixtures are mounted in or on a suspended grid-type ceiling, support fixtures at two points in addition to support from the ceiling grid.

3.1.5 Aim exterior adjustable lighting fixtures after dark. Notify County and Engineer at least three days in advance of aiming fixture. After final adjustment, drill and install self-tapping stainless steel screws to lock adjustment brackets into place.

3.1.6 Provide pendant stem-mounted fixtures with swivel hangers. Stem shall be one piece without coupling and shall be finished the same color as the canopy and the fixture, unless otherwise noted.

3.1.7 Provide mounting and anchoring of fixtures in accordance with the manufacturer’s requirements.

3.1.8 Emergency lighting units shall be arranged to provide the required illumination automatically in the event of any interruption of normal lighting such as failure of public utility or outside electrical power supply, opening of a circuit breaker or fuse or any manual act(s) including accidental opening of a switch controlling normal lighting facilities. Provide all the required components for a complete

operation.

JUNE 2026 16500-2 LIGHTING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

3.2 PRELIMINARY INSPECTION/TEST

3.2.1 Emergency lighting units shall be arranged to provide the required illumination automatically in the event of any interruption of normal lighting such as failure of public utility or outside electrical power supply, opening of a circuit breaker or fuse or any manual act(s) including accidental opening of a switch controlling normal lighting facilities. Provide all the required components for a complete

operation.

3.3 FINAL INSPECTION/TEST

3.3.1 Repeat Preliminary Inspection/Test.

END OF SECTION

JUNE 2026 16500-3 LIGHTING

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 16670

SURGE SUPPRESSION

1.0 GENERAL

1.1 DESCRIPTION

1.1.1 This section describes the materials and installation requirements for Surge Protective Devices (SPD) for the protection of AC electrical circuits from the effects of lightning induced currents, substation switching transients and internally generated transients resulting from inductive and/or capacitive load switching.

1.2 QUALITY ASSURANCE

1.2.1 The following standards and publications are referenced for use in various sections of this specification.

1.2.1.1 ANSI/IEEE C62.41, Guide for Surge Voltages in Low Voltage AC Power Circuits. For purposes of this specification, Category C shall assume a maximum voltage amplitude of ten kilovolts and a maximum current amplitude of twenty kiloamperes.

1.2.1.2 ANSI/IEEE C62.1, Standard for Surge Arrestors for AC Power Circuits.

1.2.1.3 ANSI/IEEE C62.33, Standard for Test Specifications for Varistor Surge Protection Devices.

1.2.1.4 NEMA LS-1--Low Voltage Surge Protective Devices.

1.2.1.5 Underwriters Laboratories, UL 1449, Standard for Safety, Transient Voltage Surge Suppressors, Latest edition.

1.3 MANUFACTURERS QUALIFICATIONS

1.3.1 All surge suppression devices shall be manufactured by a company normally engaged in the design, development, and manufacture of such devices for the protection of electrical circuits and electronic equipment.

1.3.2 The surge suppressor manufacturer shall provide factory repair service for all non-encapsulated assemblies and replacement parts for all encapsulated units.

1.4 WARRANTIES

1.4.1 SPD shall have a warranty for a period of five years, incorporating unlimited replacements of suppressor parts if they are destroyed by transients during the warranty period.

1.4.2 Should the suppressor fail for any reason, a replacement shall be provided during the warranty period at no cost to the Owner.

1.5 SUBMITTAL REQUIREMENTS

JUNE 2026 16670-1 SURGE SUPRESSION

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 1.5.1 Provide product data for each suppressor type in accordance with

Section 01300.

1.5.2 The surge suppression submittal shall also include, but shall not be limited to, the following additional data:

1.5.2.1 Dimensions for each suppressor type indicating mounting arrangement and required accessory hardware.

1.5.2.2 Manufacturer’s certified test data derived from test results conducted on a completed unit indicating the ability of the product to meet or exceed the requirements of this specification.

2.0 MATERIALS

2.1 MANUFACTURERS

2.1.1 SPD shall be provided by the same manufacturer. Provide protection manufactured by Current Technology, Innovative Technologies, or equal.

2.1.2 The low voltage signal surge protection equipment for devices shall be provided by Innovative Technologies, or equal.

2.2 PANELBOARD AND mcb service SURGE PROTECTIVE DEVICE (SPD)

OR TVSS (AS NOTED ON THE DRAWINGS)

2.2.1 SPD shall be UL Listed to UL 1449, Standard for Safety, Transient Voltage Surge Suppressors, and UL 1283, Electromagnetic Interference Filters.

2.2.2 SPD shall be designed for integral installation in each panelboard.

The mounting position of the SPD shall permit a straight and short lead length connection between the SPD and the point of connection to the panelboard.

2.2.3 SPD shall provide suppression components between each phase conductor and neutral, between each phase conductor and ground and between the neutral Conductor and ground.

2.2.4 All encapsulated SPD’s shall utilize an encapsulant that is UL listed and holds a 94-V2 fire retardant rating. No encapsulant compounds that incorporate epoxy shall be allowed.

2.2.5 Suppressors shall meet or exceed the following criteria:

2.2.5.1 Maximum single impulse current rating shall be 80 kA per phase. (40 kA L-N, 40 kA L-G).

2.2.5.2 Pulse life test: Capable of protecting against and surviving 2000 ANSI/IEEE C62.41 Category C3 transients without failure or degradation of UL 1449 suppression voltage ratings by more than 10%.

JUNE 2026 16670-2 SURGE SUPRESSION

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.2.5.3 The UL 1449 suppression voltage ratings shall not exceed the following:

VOLTAGE L-G L-N N-G

120/208 V 500 V 500 V 500 V

277/480 V 1000 V 1000 V 1000v 2.2.6 SPD shall be made of solid-state components and operate bidirectionally.

2.2.7 SPD shall have a response time no greater than one nanosecond for any of the individual protection modes.

2.2.8 SPD shall be designed to withstand a maximum continuous operating voltage (MCOV) of not less than 115% of nominal RMS voltage.

2.2.9 Visible indication of proper SPD connection and operation shall be provided. Visual indication shall be by means of solid state status indicator lights on the front of the SPD.

2.3 LOW VOLTAGE SIGNAL PROTECTION

2.3.1 Surge suppression for all control cabinets, PLC cabinets, and instrumentation shall be furnished and installed by the system supplier.

2.3.2 Suppressor Performance Criteria:

2.3.2.1 Maximum single impulse current withstand, conductor to ground or conductor to conductor: 10,000 amperes (8 X 20 us – waveform).

2.3.2.2 Pulse life rating: 3,000 amperes (8 X 20 us - waveform):

2,000 occurrences.

2.3.2.3 Suppressors shall have turn-on and turn-off times of less than one nanosecond 2.3.2.4 Maximum clamping voltage at 10,000 amperes, 8 x 20 us current waveform, shall not exceed the peak of the normal applied signal voltage by 200%.

2.3.2.5 Suppressors shall be a hybrid design with a minimum of three (3) stages utilizing solid-state componentry and shall operate bidirectionally.

2.3.2.6 Suppressors shall be housed in an enclosure that is compatible with the system being protected.

3.0 EXECUTION

3.1 FIELD TESTING

3.1.1 Provide factory certified test reports for each model of suppressor supplied, including test methods and equipment.

JUNE 2026 16670-3 SURGE SUPRESSION

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

3.2 PANELBOARD INSTALLATION

3.2.1 3.2.1 Install SPD as indicated on the drawings and according to manufacturer’s recommendations.

3.2.2 3.2.2 SPD shall be mounted adjacent to or integral with the panelboard. SPD shall be mounted in the switchgear as shown on the drawings.

3.2.3 3.2.3 Neutral and ground shall not be bonded together at the panelboard locations.

3.2.4 3.2.4 Provide overcurrent protection as required by the NEC for the SPD.

3.2.5 3.2.5 Suppressors shall be close-nippled to the device being protected. The mounting position of the suppressor shall permit a straight and short lead length connection between the suppressor and the point of connection.

3.2.6 3.2.6 Securely mount surge suppressor to wall, or panel with stainless steel hardware.

3.2.7 3.2.7 Conductors for connection of surge suppression shall be as recommended by the manufacturer for this application and shall be wrapped together the full length of the conductors.

END OF SECTION

JUNE 2026 16670-4 SURGE SUPRESSION

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 16855

HEAT TRACE

1.0 GENERAL

1.1 DESCRIPTION

1.1.1 This section includes requirements for materials and installation of thermostat controlled heat tracing for freeze protection of insulated process piping.

1.2 RELATED WORK SPECIFIED ELSEWHERE

1.2.1 16010 – General Electrical Requirements

1.3 SUBMITTALS

1.3.1 Submit manufacturer’s catalog data, descriptive literature, and installation instructions for heat tracers, heat tracer power connections, splicing and tee kits, thermostat controls, and signal lights to be installed on PVC, CPVC, steel, and ductile-iron pipe, fittings and valves.

1.3.2 Submit specific heat loss calculations for each insulated pipe. Calculations will include pipe sizes, materials, and valve types to document the thermal rating (in watts/lineal foot of pipe) required to maintain the pipe temperature as specified.

1.3.3 Submit installation test report.

2.0 MATERIALS

2.1 GENERAL

2.1.1 The heat tracers, power connections, thermostat controls, splicing kits, tee kits, and signal lights shall be supplied by a single manufacturer.

2.2 HEAT TRACER

2.2.1 The heat tracer shall be Chemelex Auto Trace, Dekoron 2500 series, or equal.

2.2.2 Each heat tracer shall be capable of maintaining the temperature of the insulated pipe, pipefitting, or valve upon which it has been mounted at or above 50F with an ambient temperature of 0F.

2.2.3 The heat tracers shall utilize a service voltage of 120 volt a-c and a circuit breaker size of 20 amperes. Utilize multiple circuits if the length of heat trace exceeds the manufacturer’s recommended maximum loading for a 20 ampere circuit breaker.

2.2.4 Each heat tracer shall consist of parallel copper conductors embedded in a semiconductive heating element. The heating element shall be a continuous strip extending between the copper conductors to provide a heating circuit along the entire length of the heat tracer. The heating element shall be covered by an inner insulating jacket. A tinned copper

JUNE 2026 16010-1 HEAT TRACE

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project shield shall surround the inner coating and shall in turn be covered by an outer, corrosion resistant fluoro-polymer coating.

2.2.5 The heating element in each heat tracer shall automatically decrease its power output as its temperature increases and thereby prevent tracer burnout. Do not use constant wattage heat tracers. The heating element’s self-contained temperature regulating capability shall occur independently at each point along the heating circuit.

2.2.6 The heat tracer shall be capable of being field cut to any length without impacting its heat output per lineal foot.

2.2.7 The heat tracer shall not attain a temperature sufficient to damage the pipe, pipefitting, or valve material upon which it is mounted.

2.3 ALUMINUM TAPE

2.3.1 Aluminum tape over heat tracers installed on plastic pipe shall be Chemelex AT-180, Dekoron 1528-0A018, or equal.

2.4 POWER CONNECTION

2.4.1 The power connection for each heat tracer shall be Chemelex Series PMK- JLP, Dekoron 1548-40000, or equal.

2.5 SPLICES

2.5.1 Use Chemelex Series PMK-LS splice connection kit, Dekoron 1548-40000, or equal.

2.6 TEES

2.6.1 Use Chemelex Series PMK-LT tee connection kit, Dekoron 1548-40000, or equal.

2.7 THERMOSTAT CONTROLS

2.7.1 Heating circuits shall be operated by thermostat controls.

2.7.2 Ambient temperature sensing thermostats shall be Chemelex Model AMC-1A, Dekoron 1660-15909, or equal.

2.7.3 Provide a 40 amperes contactor in a NEMA 4X enclosure for multiple 20 ampere circuits, Chemelex E304, or equal.

2.7.4 Line sensing thermostats with the temperature sensing bulb mounted on the pipe surface shall be Chemelex Model AMC-1B, Dekoron 1660-13809, or equal.

2.8 SIGNAL LIGHT

2.8.1 Connect a signal light to the end of each heating circuit to indicate whether the heat tracer is on or off.

2.8.2 The signal light shall be Chemelex Model PMK-SL with PMK-LP connection kit, Dekoron 1556-41003, or equal.

JUNE 2026 16010-2 HEAT TRACE

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

2.9 WARNING SIGNS

2.9.1 Locate “Electric Traced” signs on the outer surface of the piping insulation at 10 foot intervals (each side of pipe) to indicate the presence of electric tracing.

2.10 HAZARDOUS AREAS

2.10.1 Heat trace equipment installed in hazardous and classified areas shall be suitable and rated for installation in such areas. Heat trace used at the methanol feed station shall be rated for hazardous/classified areas.

3.0 EXECUTION

3.1 INSTALLATION

3.1.1 Install heat tracing free of nicks and cuts to its outer jacket.

3.1.2 Mount heat tracing parallel to pipe flow. Do not spiral heat tracing strips around the pipe.

3.1.3 Secure heat tracers to pipe at 1 foot intervals with a glass cloth tape with silicon pressure sensitive adhesive. Secure heat tracers to plastic pipe with aluminum tape.

3.1.4 Provide and install heat tracing for all piping identified on drawings.

3.2 TESTING

3.2.1 Prior to insulation, operate heat tracing and verify operation by temperature measurement at 5 foot intervals along the length of the pipe being heat traced. Replace all faulty heat trace, repair is not acceptable.

3.2.2 After installation of insulation, retest heat trace as indicated above.

END OF SECTION

JUNE 2026 16010-3 HEAT TRACE

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 16900

GENERAL CONTROL SYSTEM REQUIREMENTS

1.0 GENERAL

1.1 SECTION INCLUDES

1.1.1 The Contractor shall furnish all labor, materials, tools, supervision, transportation and installation necessary to perform the related work specified herein to furnish, install, and test the control system. The control system shall include all instrumentation, local control panels, local control stations, process control system equipment, and network equipment. The responsibility to provide the requirements of this specification section will be

performed by a System Integrator (SI) for the project.

1.1.2 Application logic programming of the new Programmable Logic Controllers, existing Programmable Logic Controllers (Biolac PLC) to remain, the Operator Interface Terminals, and the Human Machine Interface (HMI) system will be performed by the Contractor System Integrator (SI) for the project. Final test programs and configuration files will be provided to the SI upon completion of the factory testing.

1.1.3 The SI is responsible for all specification references herein and other specifications which apply to the overall control system, but may not be specifically referenced. All control equipment coordination, supervision, and work is the responsibility of the SI.

1.1.4 The SI is responsible for providing the networking, communications and hardware and software integration of all systems interfaced to the control network. This includes, but is not limited to, the following components:

1.1.4.1 New Programmable Logic Controllers, PLCs:

a PLC at the Influent Pump Station 1.1.4.2 Existing Programmable Logic Controllers, PLCs:

a Biolac Control Panel 1.1.5 The existing PLC control system at the Sudlersville WTP shall be modified with additional controls, alarms, and signals. The new control system is indicated on the drawings and the Control System Diagram. Biolac CP existing panel containing Allen Bradley 1769 Compactlogix components shall be modified to be an Interface Terminal Cabinet (ITC) and will interface the existing equipment with the new PLC control cabinets. There are existing

schematics for the Biolac Control panel which has spare I/O that will be utilize for the new I/O signals. The System Integrator shall perform all field investigation of the existing system prior to any submittals or shop drawings of the new equipment. The SI shall install new wire labels on the existing wiring and develop loop and interconnect drawings of the existing wiring from the field device to the existing Biolac CP and new PLC control panel. All field

verification, location of wiring and conduit, location of equipment, and

JUNE 2026 16900-1 GENERAL CONTROL

SYSTEM REQUIREMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project terminations is the responsibility of the system integrator and contractor. The SI shall perform all field verification and develop loop and interconnect drawings for submittal and approval. The SI shall be responsible for the field investigation of the existing Biolac Control panel, existing networking, existing field terminations and wiring, existing panel terminations and wiring,

existing 120 volt power circuits, and all other work required to document the existing control system. This includes the development of detailed drawings identifying all existing inputs and outputs, existing control wiring, and identification of all types and voltages of existing signals. The existing PLC system will be modified by the SI for this contract. Field investigation time and work, design and drafting time and work, equipment costs, and other

requirements necessary for a complete and thorough investigation of the existing system and implementation of all existing IO into the new control system is the responsibility of the SI. All field work shall include a minimum of two field technicians for each site visit. A minimum of 32 man hours performed by qualified technicians shall be included for the field investigation of the system. This is not inclusive of travel, design, drafting, time not

performed in the field investigating, and other requirements necessary to develop accurate field documentation and drawings. After approval of the loop and interconnect drawings, the SI shall develop new panel drawings for the existing Biolac control panel. These panels shall be modified to include new relays, with new terminal blocks, din rail, mounting hardware, circuit breakers, and other required components for a complete retrofit of existing

panel. Existing enclosures and equipment in and on the panel shall remain unless damaged or not operable. Any exterior openings in the enclosure that are not used for the new control system shall be plugged with appropriate closures. New wiring shall be connected to the new or existing available terminal blocks, new wire labeling shall be installed on all existing wiring to coordinate with the loop and interconnect drawings. New wiring,

with identification, and conduit shall be installed between the Biolac CP and new control panels and field equipment for interfacing the existing equipment to the new PLC system and field devices. The existing system shall be modified in a method as to limit the downtime of the existing system to a maximum of 8 hours for each 24 hour period. This may require temporary wiring and interfacing by the contractor and system integrator to allow the

plant to maintain operation during the switchover of components. The SI shall include an additional 16 hours of field investigation that is not including in any other work specified, or in the field investigation time noted above.

This additional time will be used as requested by the engineer and County for investigation of existing equipment.

1.2 QUALITY ASSURANCE

1.2.1 Equipment, materials, and workmanship shall comply with the latest revisions of the following codes and standards; in addition to all local codes and standards.

1.2.1.1 Instrumentation: Instrument Society of America (ISA).

JUNE 2026 16900-2 GENERAL CONTROL

SYSTEM REQUIREMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 1.2.1.2 Wiring: National Electrical Code (NEC), ISA S5.3 and S5.4.

1.2.1.3 Control Panels and Equipment: NEMA, UL, and ANSI.

1.2.1.4 Institute of Electrical and Electronics Engineers (IEEE).

1.2.1.5 Electronic Industries Association (EIA).

1.3 SUBMITTALS

1.3.1 Submit shop drawings in accordance with section 01300.

1.3.2 Prior to submitting any control system hardware or control panels the SI shall submit detailed drawings of field investigation of the existing control system panels. This submittal shall include the following as a minimum:

1.3.2.1 Complete drawing of existing Biolac CP panel including all terminations, wiring, PLC components 1.3.2.2 Input and Output List of all digital and analog IO including voltages and types 1.3.2.3 Analog loop drawings with wire identification 1.3.2.4 Digital Interconnect drawings with wire identification 1.3.2.5 Power drawings and requirements for each panel 1.3.2.6 Dimensional, layout, and schematic drawings for each new ITC

back panel 1.3.3 The submittals shall be prepared and organized by the approved SI. Submit drawings and data as a complete package at one time after submission and approval of the SI qualifications as noted below.

1.3.4 Data sheets for each component, together with a technical product brochure or bulletin. The data sheets shall show:

1.3.4.1 Component name.

1.3.4.2 Manufacturer’s model number.

1.3.4.3 Project location.

1.3.4.4 Input and output characteristics.

1.3.4.5 Requirements for electric supply.

1.3.4.6 Submit certified dimensional drawings and catalog cuts for each size and type of component specified herein. Catalog cuts are to be highlighted to define specific materials of construction and features specified herein.

1.3.4.7 Submit control panel and programmable logic controller power and control schematics including connection drawings. Drawings shall show locations and wiring for all terminal blocks, power supplies, over-current protection, and equipment. All equipment shall have nameplates, and all wiring shall have wire numbers

JUNE 2026 16900-3 GENERAL CONTROL

SYSTEM REQUIREMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project associated with terminal connections. Submit a tag list for all wiring and terminations of the control panels for approval. Wire identification shall corresponding IO requirements if applicable, and terminal block points for wires not associated with IO.

1.3.4.8 Submit complete Input and Output (IO) List on Excel spreadsheet which indicates tag-name, description of tag, IO terminal block points, wire identification, I/O point in PLC, energized state, and un-energized state, range, new or existing point. SI shall update the list based on field verification prior to each test including the factory test, preliminary test, and final test. IO list shall be

submitted and approved prior to PLC panel drawing submittals.

1.3.4.9 Submit instruction bulletins for each type of component specified herein. The instruction bulletin shall include installation instructions, wiring diagrams, power requirements, maintenance instructions, and any other details of a specialized nature to the instruments furnished.

1.3.4.10 Group the data sheets together in the submittal by systems, as a separate group for each system. If within a single system, a single component is employed more than once, one data sheet with one brochure or bulletin may cover all identical uses of that component in that system.

1.3.4.11 Submit component interconnect and loop drawings showing the interconnecting wiring between all new components, connections of new equipment to existing equipment, and control equipment provided for the project. Drawings shall accurately depict all wiring and terminal connections including routing of wire, wire numbers, and panel and instrumentation and equipment terminal connections. A interconnect and loop drawing shall show the

connection from the field device through junction boxes, ITC terminal blocks, and other equipment up to the new PLC IO module. Identification of field terminal blocks on panel IO drawings are not acceptable as interconnect and loop drawings.

The SI is responsible for identification of all new and existing terminal connections, junction boxes, ITC terminations, and coordination with the equipment vendors to incorporate the required information on the loop and interconnect drawings.

1.3.4.12 Submit arrangement and construction drawings for consoles, control panels, and for other enclosed assemblies for field installation. These drawings shall include dimensions, identification of all components, terminal block and device layout, preparation and finish data, and nameplates. These drawings also shall include enough other details to define the style and overall appearance of the assembly; include a finish treatment

sample.

JUNE 2026 16900-4 GENERAL CONTROL

SYSTEM REQUIREMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 1.3.4.13 Submit wiring diagrams, schematics, interconnect, and loop drawings for each panel and enclosure provided. Drawings shall include terminal block and wire identification for panel and field connections, including physical layouts in the panel.

1.3.4.14 Submit installation, mounting and anchoring details for all new and relocated components or entry details.

1.3.4.15 Submit complete and detailed bills of material including manufacturer and model number of all equipment.

1.3.4.16 Submit preliminary electronic configuration files for all PLC, OIT, Power Monitor, and HMI configuration to the County for use by the CPE a minimum of 60 days prior to the Factory Acceptance Test. Submit final electronic configuration finals upon completion of the Factory Acceptance Test for applicable equipment and completion of the Witnessed Preliminary Test for applicable equipment.

1.3.4.17 Submit sample calibration reports with shop drawings and final calibration reports for each instrument at the completion of the preliminary testing. All final calibration reports shall include NIST calibration date of test equipment used for calibration.

Tagnames, instrument ranges, serial numbers, test equipment used and other applicable information shall be included in the calibration reports.

a 1.3.4.17 shall apply to all new instrumentation device that interface with existing transmitters/controllers (i.e the replacement LDO probe at the existing Biolac basin) 1.3.4.18 Submit complete test procedures for each phase of testing including factory tests, preliminary tests, and final tests. Upon completion of each testing phase and prior to the acceptance of any test or equipment, the completed test procedure shall be

submitted.

1.3.4.19 Submit pre-submittal conference agenda and documentation.

1.3.4.20 Submit System Integrator Qualifications.

1.3.5 Operations and Maintenance Manuals 1.3.5.1 Submit Operation and Maintenance Manuals in accordance with

section 01300.

In addition to requirements in those sections and as specified herein, include the following additional information:

a PLC and OIT test programming and configuration files in paper and electronic files.

b OIT test and configuration displays in paper and electronic file.

JUNE 2026 16900-5 GENERAL CONTROL

SYSTEM REQUIREMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project c The organization of the initial submittal shall be compatible to eventual inclusion one volume of the operation, maintenance and repair manuals.

d In addition to the General Provisions, the complete operation and maintenance manual shall contain all the information included in the submittal drawings and data, and the additional information required herein, all bound in hard cover binders and arranged for convenient use including tab sheets, all indexed and cross referenced, and all final as-built drawings.

e The operation manual shall contain:

i Operating instructions written for the benefit of plant operating personnel for normal operational conditions. Including details of the operation of each local control panel, instrumentation, and applicable equipment.

ii Calibration and maintenance instructions, including final calibration reports for all instruments which indicate the range, test results, serial number, model number and manufacturer of equipment.

iii Trouble-shooting instructions.

iv Supplier list and instructions for ordering replacement parts, including name, address, and phone number of local supplier, plus manufacturer name and model number of equipment.

1.3.6 Submit Manufacturer’s Certificates for complete plant control system in accordance with section 01200.

1.4 SPECIAL TOOLS AND SPARE PARTS

1.4.1 Spare parts recommended by the equipment manufacturer shall be provided.

1.4.2 Provide tool kits and test equipment, as recommended by the manufacturer, necessary for assembling, calibrating and maintaining equipment.

1.4.3 Refer to applicable specification sections for spare part requirements.

1.5 PRODUCT DELIVERY, HANDLING AND STORAGE

1.5.1 Delivery, handle and store the equipment in accordance with section 01200 and the manufacturer’s instructions. Electrical Service Changes 1.5.2 Proper and suitable tools, equipment and appliances for safe and convenient handling and placing of materials and equipment shall be used. During loading, unloading and placing, care shall be taken in handling equipment

JUNE 2026 16900-6 GENERAL CONTROL

SYSTEM REQUIREMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project and materials so that no equipment and materials, including County furnished and existing, are damaged.

1.5.3 Materials and equipment, which are damaged or affected as a result of improper handling or storage, shall be subject to removal at direction of Engineer and replaced with new materials, at no cost to County.

1.5.4 Store and safeguard equipment. Instruments shall not be stored outdoors.

Provide dry, secure storage facilities.

1.6 RELATED PRODUCTS

1.6.1 Provide the equipment, material, work, testing, calibration, and all other requirements as specified in the following sections and as shown on the drawings:

1.6.1.1 Instrumentation – Section 16920.

1.6.1.2 Control System Equipment – Section 16942 1.6.1.3 Cabinets, Panels, Consoles and Devices – Section 16946 1.6.1.4 Control Descriptions – Section 16965 1.6.1.5 All Applicable Electrician and Mechanical Sections.

1.6.2 Other specification sections required for interfacing of the control system with vendor provided equipment shall be the responsibility of the SI. This includes but is not limited to the Methanol Feed System, and the New Blowers.

1.7 QUALIFICATIONS AND RESPONSIBILITY OF SYSTEM INTEGRATOR

1.7.1 The Contractor’s subcontractor, herein referred to as the System Integrator (SI) shall furnish and install all proposed hardware and software as specified herein, supply and install all internal and external wiring within the system, perform and supply all engineering, drafting and configuration to deliver a complete and operable system as specified. All systems shall be the unit responsibility of the SI.

1.7.2 The SI shall be responsible for coordinating and interfacing with existing and new equipment specified under the contract documents which are an integral part of the system. The SI shall incorporate interfacing in the detailed systems drawings and data sections.

1.7.3 The System Integrator from this contract, will provide the PLC control strategy logic, OIT software development, and HMI software development for the system. The SI shall be responsible for all testing, PLC and OIT configuration, HMI network configuration and communications and complete system verification of all system hardware, communications, and operation.

1.7.4 The SI shall meet all required qualifications as indicated in Item 1.7.5 below, and be regularly engaged in control system integration work in the water and wastewater industry. Failure to provide and obtain approval of the required information will deem the SI submitted as unqualified. It shall be the

JUNE 2026 16900-7 GENERAL CONTROL

SYSTEM REQUIREMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project Contractor’s complete responsibility to provide the required documentation for a qualified SI. Only qualified SI’s will be acceptable for the project.

1.7.5 Qualification submittal: The Contractor shall submit for approval within 15 (fifteen) calendar days after Contract Award, detailed information of the SI qualifications. The qualification submittal shall be submitted and approved before any further submittals will be accepted. Failure to submit and obtain approval of the minimum requirements shall be grounds for rejection of the SI as an acceptable SI. The qualification submittals shall contain, as a

minimum, the following information:

1.7.5.1 SI shall submit five (5) references for wastewater projects successfully completed, on time without outstanding claims or litigation, within the last 5 (five) years. References shall include name, address, phone number and email of Owner and Engineer on the project. References shall include a detailed description of all work accomplished on the project for PLC fabrication and integration, Ethernet networking, instrumentation calibration,

development of loop and interconnect drawings, and similar work as required for this project. References that do not meet the criteria above or if references provide an unfavorable response are grounds for rejection.

1.7.5.2 The name, resume and qualification of supervisory personnel, to be directly responsible for the installation, showing at least 5 water/wastewater control system projects of similar scope and complexity completed successfully. Minimum of project manager assigned to the project, field supervisor assigned to the project, and control system technicians assigned to the project are required.

1.7.5.3 Submit organization chart of all key personnel on project, including field technicians to perform field investigation. All field investigation shall be performed by approved technicians.

1.7.5.4 The contractor’s local place of business shall be located within a 100 miles radius of the Patuxent WRF in Crofton, Maryland.

1.7.5.5 The SI shall provide proof of a current UL 508A certification of their industrial control panel shop for the assembly of all control panels.

1.7.6 The system installation and wiring connections to peripheral equipment and instruments shall be the responsibility of the SI using qualified personnel possessing the necessary equipment and having experience in making similar installations.

1.7.7 The SI shall provide all programming required for system configuration;

communications to the I/O, communications to the OITs, and existing HMI system; and communications between PLCs; and general system operation.

JUNE 2026 16900-8 GENERAL CONTROL

SYSTEM REQUIREMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project Additionally, the SI shall provide all coordination with the VFD supplier, for communications and configuration of the equipment connected and networked to the control system. The SI shall have complete responsibility for coordination of all subcontractors of equipment to provide a complete and operational control system.

1.7.8 The SI shall be responsible for providing all software, hardware, and equipment necessary for configuration, programming, and testing of the specified control system equipment and instrumentation.

1.7.9 The proposed field instruments shall be new. Manufacturers and model or type numbers are provided as part of the instrument narrative descriptions.

The proposed manufacturers are those on which the instrument design has been based.

1.7.10 The SI shall attend scheduling meetings with the CPE, County and Contractor to develop a startup schedule for the control system. A minimum of two (2) four hour meetings shall be required for the project. Other meetings as required for coordination shall be performed by the SI and associated parties. The SI shall submit monthly reports to the County stating the requirements of the schedule as it relates to the engineer, CPE, in

reference to the system design, installation, system testing, configuration, and startup. The schedule shall be provided each month by the SI and include all dates for the required work. The schedule will be used by the County for testing and startup purposes of the control system. An initial presubmittal conference shall be performed by the SI after approval of qualifications, and within 60 days of approval. The pre-submittal shall

include:

1.7.11 Provide materials 10-days prior to the conference:

1.7.11.1 Instrument Index that lists the devices and instruments specified in Division 13 identify each by tag number, description, function, manufacturer, and model number 1.7.11.2 Product descriptive literature with a statement that the item is as specified.

a Proposed equal products with comparative listing of the published specifications for the specified item and the proposed item.

b Project Control System Block Diagram.

c Detailed plan and sequence of work for replacing the existing PLC system with Biolac CP. Plan shall include

JUNE 2026 16900-9 GENERAL CONTROL

SYSTEM REQUIREMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project field investigations, drawing development, field modifications, temporary connections and testing.

d Sample control panel schematic diagram proposed for this project. Sample can be a copy from a previous project provided that it represents the format being proposed for e Sample analog and discrete loop and interconnect diagrams proposed for this project. Sample can be a copy from a previous project provided that it represents the format being proposed for.

1.7.11.3 The pre-submittal conference will not replace the Product and Shop Drawing Submittal review process.

1.7.12 The SI shall submit the final I/O list a maximum of 30 days after approval of the field investigation IO list.

1.7.13 The SI shall be responsible for coordinating and interfacing with equipment supplied under these contract documents which are integral parts of the system. The Contractor shall provide all interfacing, devices, fitting, connections required for the entire system operation. The SI shall demonstrate operation of all software and hardware, including verification and testing of I/O and communication. Incorporate interfacing in the detailed

systems drawings and data section of the contract documents.

1.7.14 The SI shall develop a master plan including a schedule for accomplishing all tasks. The SI shall coordinate with the Contractor, major process and electrical equipment manufacturers, other subcontractors, the County, the CPE, and the Engineer when developing the plan. The plan shall include all tests dates for Factory and Field Testing of control system and other devices connected to the system. The existing control system shall remain in

operation during construction until the new control system has been implemented. The contractor and system integrator shall provide all work, including temporary connectors and cables to maintain system operation.

1.8 INPUT/OUTPUT (LIST I/O)

1.8.1 The I/O list and the drawings shall be used as a basis for fabrication of the control system. The list shown is a minimum quantity of points. The SI shall develop and provide an IO list in MSExcel for all points specified on the project. The IO list shall be submitted with all applicable information and be used throughout the project for the SI, County, and CPE to verify the program and testing of the project.

1.8.2 Table 16900-01 “Input/Output List” is included at the end of this section, the I/O list includes spare points for each type of points required at each PLC.

The SI is responsible to provide a minimum of 20% spare points at each PLC panel if more is required than shown. The Input/Output List at the end of the section provides a minimum quantity of points for the existing PLC system.

Based on the contractor’s findings during the field investigation, a final IO list

JUNE 2026 16900-10 GENERAL CONTROL

SYSTEM REQUIREMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project will be developed which includes an accurate count and description of all points.

1.9 DESIGN

1.9.1 The SI shall utilize the I/O list, drawings, and schematics, P&IDs, manufacturer’s shop drawings, submittal information, field investigation, development of drawings and IO, and all available material as the basic criteria for the design of the control system. The SI design shall include all instrumentation provided for the project; all control panels, schematics, and manufacturer’s data including data sheets, wiring diagrams, piping layouts,

assembly drawings, and other requirements set forth in these specifications.

1.9.2 Control system Design Documents shall be provided by the SI in a complete submittal package, interim or partial submittal packages shall not be acceptable. Installation and testing of the control system and instrumentation will not be accepted until a complete design package has been submitted and approved.

1.10 TESTING AND FINAL CHECKOUT

1.10.1 The County shall witness testing, start-up and final checkout of the system to determine if the system complies with the contract documents.

1.10.2 Provide 4 hours of instruction for each type of instrument.

1.11 GUARANTEE

1.11.1 See: One-year guarantee, General Provisions.

1.11.2 Repair or replace defective components, rectify malfunctions, correct system problems, and correct faulty workmanship, at no additional cost to the County during the guarantee period.

1.11.3 SI shall provide new components for the replacement of defective components; the use of the County’s spare parts is prohibited.

1.12 SYSTEM PROGRAMMING AND CONFIGURATION

1.12.1 The SI shall provide all programming required for system configuration;

communications to the I/O, communications to the HMI and OITs, communications between PLCs; and general system operation. The system shall be made completely operational, less the PLC control strategy logic, by the SI.

1.12.2 A County programming engineer (CPE) will have access to the PLC control system for a minimum of 10 consecutive working days immediately after final approval of the factory acceptance test. The SI will provide the CPE all configuration code for the PLC, OIT, network communications, and other equipment at the completion of the factory acceptance test. The control system, wiring, network cables, and associated equipment shall remain

connected to the equipment after the factory acceptance test for the CPE to load and debug their program. The SI shall provide a technician familiar with

JUNE 2026 16900-11 GENERAL CONTROL

SYSTEM REQUIREMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project the control system to assist the CPE during this 10 day period at the SI’s facility. The system nor the components used during the factory test shall not be shipped from the facility, prior to completion of this 10 day period.

1.12.3 The SI shall be responsible for providing all software, hardware, and equipment necessary for configuration, programming, and testing of the specified control system equipment and instrumentation.

1.13 INSTRUMENT TAGGING

1.13.1 Attach a stainless steel tag with stainless steel wire to each instrument and mechanical device, such as transmitters, valves, etc. Permanently emboss or engrave the stainless steel tag with the instrument tag number. Tag numbers will be those identified on the Contract Documents and as defined for the instrumentation.

1.14 MATCHING STYLE, APPEARANCE, AND TYPE

1.14.1 All display instruments of each type shall represent the same outward appearance, having the same physical size and shape and the same size and style of numbers and pointers.

2.0 PRODUCTS

2.1 GENERAL

2.1.1 Electrical components shall operate on 115 volts ac, 60 hertz unless otherwise specified.

2.1.2 Provide two-and four-wire transmitter power supplies in local panels as required. Provide surge terminal blocks for connections of all analog signals which are wired using conduit and raceways which are either underground or exposed on exterior of structures.

2.1.3 Provide fuses or overcurrent protection for all instrumentation, IO modules, PLCs, OITs, and associated control equipment, as recommended by the instrument manufacturer.

2.1.4 The SI is responsible to meet all requirements of the contract documents and review comments as they apply to the contract. Variations will not be implemented due to the SI’s lack of certification of certain UL components or fabrication practices. It shall be the SI’s complete responsibility to obtain all UL requirements for the control system and applicable devices.

2.1.5 All digital inputs to the PLC system shall be obtained from relays or devices with dry contacts rated at a minimum 10 amp at 120 volts. Other contacts

JUNE 2026 16900-12 GENERAL CONTROL

SYSTEM REQUIREMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project required in the system shall have this minimum requirement and be of ample capacity for the system connected.

2.1.6 Process transmitters shall generate 4-20 mA DC analog output signals.

2.1.7 The PLC shall generate 4-20 mA DC analog output signals.

2.1.8 Interposing relays shall be implemented on all digital outputs for the PLC system. Contacts on relays shall be 10 amps at 120 volt, minimum.

2.2 MANUFACTURERS

2.2.1 Refer to specific section for manufacturer.

2.3 DESIGN CONDITIONS

2.3.1 All control equipment and instrumentation shall meet or exceed the following environmental conditions.

2.3.1.1 Temperature: 10 to 40 degrees C.

2.3.1.2 Relative Humidity: Maximum wet bulb 28 degrees C.

3.0 EXECUTION

3.1 INSTALLATION

3.1.1 Uniformity of Components 3.1.1.1 Components which perform the same or similar functions shall, to the greatest degree possible, be of the same or similar type, the same manufacture, the same grade of construction, the same size, and have the same appearance.

3.1.2 Installation of Equipment and Accessories 3.1.2.1 Install new equipment in accordance with the installation detail drawings as prepared and submitted by the SI and reviewed by the County. Mount equipment so that it is rigidly supported, level and plumb, and in such a manner as to provide accessibility;

protect it from damage; isolate it from heat, shock, and vibration;

and be free from interference with other equipment, piping, and electrical work. Do not install consoles, cabinets, and panels until construction work adjacent to their location has been completed to the extent that there shall be no damage to the equipment.

3.1.2.2 Locate devices, including accessories, where they shall be accessible.

3.1.2.3 Mount equipment in cabinets or existing panels as specified.

Mount associated terminals on a common panel or rack;

mounting panels and racks shall have a baked enamel coating.

3.1.2.4 Coordinate the installation of the electrical service to the specified components related to the system to assure a compatible and functionally correct system. All accessories shall be coordinated

JUNE 2026 16900-13 GENERAL CONTROL

SYSTEM REQUIREMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project and a compatible installation shall be the responsibility of the Contractor.

3.1.3 Calibration 3.1.3.1 Calibrate and configure the programmable control and instrumentation system after installation in conformance with the component manufacturer’s instructions. This shall provide that those components having adjustable features are set carefully for the specific conditions and applications of this installation and that the components and/or systems are within the specified limits of accuracy. Defective elements which cannot achieve

proper calibration or accuracy, either individually or within a system shall be replaced. This calibration work shall be accomplished by a technical field representative of the equipment supplier. Certify in writing to the Engineer that all calibrations have been made and that all systems are ready to operate.

3.1.3.2 Provide 5 point field verification for each instrument. If 5 point verification cannot be performed, such as for flow instruments, provide witnessed field configuration. Submit field calibration report for each instrument on the project, provided by the SI or other vendors, including the tag number, serial number, date of calibration/verification, range, calibration results for each point,

and name of qualified technician performing calibration. The SI shall submit sample calibration reports prior to field calibration of instrumentation.

3.1.3.3 All instrumentation calibrations shall be recorded and documented on calibration reports provided to the engineer in a submittal. Final approved reports shall be included in the O&M manual.

3.1.3.4 All test equipment used for field calibration shall have a current, less than 12 months, certification that the equipment has been NIST calibrated. Any field instrumentation which is calibrated using test equipment not NIST calibrated shall not be accepted.

3.1.3.5 After approval of the field calibration reports, the SI shall provide and install a final calibration label on each instrument which includes the tag number, date of calibration/verification, range, and initials of person performing calibration/verification.

3.2 MANUFACTURER’S SERVICES

3.2.1 The Contractor shall refer to the special provisions for the requirements of the manufacturer services for all equipment provided in Section 16900 and related sections of the Contract Documents. The services indicated in the

JUNE 2026 16900-14 GENERAL CONTROL

SYSTEM REQUIREMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project special provisions shall be in addition to those indicated in the specification sections.

3.2.2 Provide the services of the manufacturer’s representative for not less than ten 8-hour days on-site for installation inspection, start-up, and testing of each instrument and component.

3.2.3 Provide the services of the SI for not less than ten 8-hour days onsite for verification that the complete control system is installed as required for the project. This verification will include all control panels, control wiring, networking, panel installation and operation, and overall system implementation.

3.3 FIELD COATINGS

3.3.1 None required.

3.4 FIELD TESTING

3.4.1 General 3.4.1.1 Tests will require scheduling among all parties involved so that the tests may proceed without delays or disruptions by uncompleted work. Coordinate operational tests dependent upon completion and sequencing of work specified elsewhere.

The County shall approve all test dates.

3.4.1.2 The SI shall provide onsite assistance to the CPE, with a qualified representative of the PLC control system, for a minimum of thirty (4), 8 hour, working days after completion of the final testing.

The days will be performed at the request of the County and may not be consecutive. This assistance is in addition to all test requirements specified herein.

3.4.1.3 For each test the SI shall submit for approval a test procedure a minimum of 30 days prior to the test. The procedure shall include a list of each I/O point, instrument, device, and control panel in a tabular format. The procedure shall include time and date for testing of each point and each control device. The time and date will be initialed by the SI and the Engineer witnessing the test.

Contract drawings and shop drawings are not acceptable. Upon successful completion of each test, the completed and signed procedure shall be submitted.

3.4.1.4 It shall be understood by the SI and Contractor that the project may be brought on line through a phased approach, which will require Subsystem testing for each of the test phases. The SI shall develop independent test procedures for each phase implemented.

3.4.1.5 The County or County’s representative will witness all testing.

The SI shall be responsible for all performance testing, including

JUNE 2026 16900-15 GENERAL CONTROL

SYSTEM REQUIREMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project any required hardware, software, cabling, test equipment, and other devices. Should the SI not be prepared for the test date scheduled the test will be canceled and rescheduled at a date approved by the County.

3.4.1.6 The SI shall provide and configure all software for all systems and equipment which are delivered and installed to the project.

Software required for demonstration, testing, and operation of the proposed equipment and systems shall be developed and provided by the SI. The software provided and developed by the SI shall be capable of achieving the desired plant operational and communications requirements as defined in the Contract Documents. The SI shall install and develop all software required to demonstrate the required operation and communications of

the system. The SI shall provide and configure all the test software required to demonstrate the system operation for the new and existing equipment required by the Contract Documents. All software provided by the SI shall be coordinated with the Engineer and obtain approval prior to installation.

3.4.2 Factory Acceptance Test 3.4.2.1 Prior to the SI uploading the PLC and OIT program or the SI shipping the equipment to site, the SI shall perform a factory acceptance test (FAT) of the system with a simulated network.

Each PLC cabinet will be fully configured by the SI and simulated for operation on the network in the FAT.

3.4.2.2 The FAT performed by the SI will include the following as a minimum a Inventory of all System Components b Wiring Diagrams of I/O to relays and terminals from each control panel and each I/O point c Wiring diagrams of the network used in the FAT from PLC to PLC, PLC to the OIT, and all other equipment in the network.

d Testing procedure to verify the command and status signals to and from each I/O point from the cabinet to the programming terminal 3.4.2.3 Operational tests shall be performed prior to shipping the control system to the jobsite to demonstrate that the hardware, I/O points, and system configuration, network and other components will perform each operation required for all specified conditions and in accordance with Contract Documents. The Engineer and

a representative for the County shall witness the tests. After the testing is completed, provide a certification and log of all tests to

JUNE 2026 16900-16 GENERAL CONTROL

SYSTEM REQUIREMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project the County for review and comment. The panel wiring, layout, configuration, model numbers and equipment shall be checked against the submittal drawings.

3.4.2.4 The factory witness test shall take as long as necessary to demonstrate to the County and the Engineer that the hardware performs each operation as required per the specifications.

3.4.2.5 Prior to factory system testing, submit a written detailed test procedure for review by the County, including a layout of the proposed test network and any test equipment provided. Notify the County in writing four weeks in advance of the scheduled testing.

3.4.2.6 The factory test will include the new PLCs, OITs, Ethernet Switches, and Category 6 Network Cables, and associated Equipment for a complete Test.

3.4.2.7 The SI is responsible to configuration of a network demonstrating data transfer between PLCs, to the OIT, from a and to a PC using an applicable software driver for communications.

3.4.2.8 Upon successful completions of the FAT by the SI, the SI shall assist the CPE with the testing of the PLC, HMI and OIT programming. The CPE shall be permitted to access the SI’s facility for their work during normal business hours of operation to complete this testing.

3.4.3 Preliminary Test – Unwitnessed 3.4.3.1 After installation of the complete specified system, the Contractor shall perform an unwitnessed preliminary test. All equipment shall be operable and interfaced to the control system. The unwitnessed test shall demonstrate that the system is completely wired and operation prior to scheduling the witnessed test with the Engineer.

3.4.3.2 For the completion of the unwitnessed preliminary test, the SI shall perform a complete I/O point test to demonstrate the specified data is transmitted from the field device to the PLC I/O registers and from the PLC I/O registers to the field devices. A certified test identifying all I/O points individually tested shall be provided by the SI, for approval by the County. The SI shall load and utilize their own PLC programming software to perform the

testing.

3.4.3.3 The unwitnessed preliminary test will be separated into dependent tests each time a system is put into operation. The SI shall verify all control system operations required for each device prior to establishing system operation.

JUNE 2026 16900-17 GENERAL CONTROL

SYSTEM REQUIREMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.4.3.4 The SI shall demonstrate communications and data transfer between the PLCs, and OITs. Data shall be shown in the software at each OIT from the respective PLC, and at the PC from all PLCs. The SI shall load and utilize their own PLC programming software, and OIT development software for the test.

3.4.3.5 The unwitnessed preliminary test shall demonstrate actual operation of equipment and is not to function as a wiring check test. All equipment shall be operational and completely wired.

The test will demonstrate operation of the equipment. Equipment not operational shall be noted in the test procedure and documented. The County shall have sole discretion on which points will be acceptable to simulate due to process restrictions.

3.4.3.6 Prior to beginning the witnessed preliminary test, the SI shall submit the approved and completed test results for the unwitnessed preliminary test. Only the test results submitted and approved will be included in the witnessed testing.

3.4.3.7 The unwitnessed preliminary test, witnessed preliminary test, final test, and reliability test shall be performed by process Subsystems in lieu of a complete facility test if required by the Contractor’s construction schedule for implementation of the project. The SI is responsible for all coordination of the Subsystem tests and associated components as required by the Contractor’s schedule to bring on each processes.

3.4.4 Preliminary Test – Witnessed 3.4.4.1 All systems shall be retested as specified in the witnessed preliminary test in the presence of the Engineer, CPE, and the County.

3.4.4.2 Prior to the Witnessed test all other test results and configurations must be submitted and approved including network test results, VFD and MCC test and configuration, and network configuration.

3.4.4.3 The SI shall perform the witnessed preliminary test in order to demonstrate achievement of the specified performance. The witnessed preliminary test will correct operation of all PLC IO, local control panel operation, instrumentation calibration, and will demonstrate communications to all equipment on the network.

3.4.4.4 The SI shall have all wiring and network connections to the new and existing equipment complete and operational for this testing.

3.4.4.5 When systems are assessed to have been successfully carried through the witnessed preliminary test and the County concurs in

JUNE 2026 16900-18 GENERAL CONTROL

SYSTEM REQUIREMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project this assessment, a date for final testing involving the County operations personnel and CPE will be agreed upon.

3.4.5 Final Test 3.4.5.1 All systems shall be completely tested and operation prior to scheduling the final test for the control systems.

3.4.5.2 The SI shall perform a Final test of the system demonstrating that all equipment and IO are fully operational. The Final test shall occur in a consecutive uninterrupted time frame, as this should be a re-check of the Witnessed Preliminary Test. Should failures occur during the Final Test, the test may be cancelled at the discretion of the County and rescheduled upon correction of the failures.

3.4.5.3 All deficiencies noted in the preliminary testing shall be corrected and demonstrated during the final test period.

3.4.5.4 Transmission of data between PLCs, OITs, and other equipment shall be demonstrated using real time data from instruments and equipment.

3.4.6 Reliability Testing 3.4.6.1 The SI shall recheck the system at this time to verify proper operation, calibration and final adjustments shall be made.

3.4.6.2 Upon 100% successful completion of the Preliminary and Final testing, and approval of the test results by the County, the OIT configuration software, and the HMI software on the PC.

3.4.6.3 The SI will debug their software for a total time of 14 working days (for each request of Final Test by the Contractor), prior to the start of the reliability test.

3.4.7 Acceptance Testing 3.4.7.1 After the programming software is debugged by the SI, the Acceptance testing period for the applicable subsystem shall be scheduled. The Acceptance test for each subsystem shall consist of fourteen consecutive days of continuous testing. The SI shall be on call 24 hours a day ready to respond and repair the system within two (2) hours during this time. The system shall be

100% operational for the Acceptance test period. If the system fails to be 100% operational, the SI shall remedy the problem immediately. The Acceptance test will then restart and consist of fourteen consecutive days of continuous testing from the time of failure. The Acceptance test period will occur for each Subsystem brought into operation.

JUNE 2026 16900-19 GENERAL CONTROL

SYSTEM REQUIREMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.4.8 Final Acceptance Testing 3.4.8.1 After all Subsystems are completely online and operational, the Final Acceptance Test shall be performed to demonstrate operation of the complete system with all equipment and processes operational. The Final Acceptance testing period for the complete control system, processes, and connected equipment shall consist of fourteen consecutive days of

continuous testing. The SI shall be on call 24 hours a day ready to respond and repair the system within two (2) hours during this time. The system shall be 100% operational for the Final Acceptance test period. If the system fails to be 100% operational, the SI shall remedy the problem immediately. The Final Acceptance test will then restart and consist of fourteen consecutive days of continuous testing from the time of failure.

3.5 TRAINING

3.5.1 General 3.5.1.1 SI shall provide the County operating and maintenance personnel and/or the County Representative with a minimum of four (4) 8 hour days of formal instruction in the functions and operations of the communications, PLC systems, OITs, instrumentation, and other control related equipment, provided under this contract. The training shall cover overall system theory, hardware architecture, bus communications,

maintenance and diagnostics. The education and instruction of operating personnel shall be by a qualified instructor familiar with the requirements for this project. Each daily training session shall be for eight hours of formal instruction. Session dates and locations shall be directed by the County.

3.5.2 Manuals 3.5.2.1 The SI shall provide four copies of training manuals for each course.

3.5.2.2 The training manuals shall include, but not be limited to:

a Description of operation of each hardware component of the system.

b Normal operational procedures.

c Abnormal (emergency) operational procedures.

d Communications and configuration techniques.

e System maintenance.

f Calibration – including a demonstration for each instrument, device, and component.

JUNE 2026 16900-20 GENERAL CONTROL

SYSTEM REQUIREMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.5.2.3 Operations and maintenance manuals may be used to supplement training manuals.

3.5.3 Training Syllabus 3.5.3.1 A training syllabus shall be submitted by the Contractor a minimum of four (4) weeks prior to training for approval by the County. The syllabus shall outline all training criteria and include the instructor’s name and qualifications.

END OF SECTION

JUNE 2026 16900-21 GENERAL CONTROL

SYSTEM REQUIREMENTS

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 16942

CONTROL SYSTEM EQUIPMENT

1.0 GENERAL

1.1 SECTION INCLUDES

1.1.1 This section includes requirements for the programmable logic controller (PLC) equipment and network services to be provided by the PLC manufacturer and the System Supplier (SS) under Section 16900.

1.1.2 For existing PLCs: Provide new I/O modules, wiring arms, terminal blocks, terminations, labeling on existing PLCs enclosure as required to meet the contract. Refer to Drawings for existing PLC I/O modules to be provided.

Modification of the exiting PLC enclosure shall be performed to add new I/O points on existing PLCs. Contractor shall provide the same model of each type of I/O module currently installed.

1.2 QUALITY ASSURANCE

1.2.1 Comply with applicable portions of section 16010.

1.3 SUBMITTALS

1.3.1 Submit shop drawings and catalog data in accordance with section 01300 and Section 16900.

1.3.2 Submit Operation and Maintenance Manuals in accordance with section 01300.

1.4 SPECIAL TOOLS AND SPARE PARTS

1.4.1 The Contractor and System Supplier (SS) shall furnish to the representative of the Owner all necessary spare parts of components required to maintain the system. Prior to final acceptance of work, the system supplier shall provide a spare parts listing of all necessary spare parts and quantities for review of the representative of the Owner. The spare parts shall include, but not be limited to, the following minimum requirements.

1.4.1.1 PLC Equipment a Power Supply, 1 of each type b Analog Output Module, 1 of each type c Analog Input Module, 1 of each type d Discrete Output Module, 1 of each type e CPU Module, 1 of each type f I/O Chassis Assembly, 1 of each type g Communication Interface Module, 1 of each type h Communication Adapter Module, 1 of each type

1.5 PRODUCT DELIVERY, HANDLING AND STORAGE

JUNE 2026 16942-1 CONTROL SYSTEM EQUIPMENT

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 1.5.1 Delivery, handle and store the equipment in accordance with section 01200 and the manufacturer’s instructions.

1.6 RELATED WORK SPECIFIED ELSEWHERE

1.6.1 General Electrical: 16010 1.6.2 General Control Requirements: 16900 1.6.3 Cabinets, Panels, Consoles, and Devices: 16946

2.0 PRODUCTS

2.1 GENERAL

2.1.1 Designation Of Components 2.1.1.1 In these specifications and on the plans, all systems and other elements are represented schematically and are designated by numbers, as derived from criteria in ISA standards. The nomenclature and numbers designated herein and on the plans shall be employed exclusively throughout shop drawings, data sheets, and the like. Any other symbols, designations, and

nomenclature unique to the manufacturer’s standard methods shall not replace those prescribed above, as used herein, and on the plans.

2.1.2 Programmable Logic Controller (Plc) 2.1.2.1 General a The PLC system shall consist of a microprocessor-based stand alone device. The PLC shall be a process and logic controller designed for industrial environments in a modular configuration.

b The PLC shall be a module rack unit complete with central processor, memory, Base with associated power supply, interconnecting cables, discrete and analog input/output modules and communication interface modules.

c The Programmable Automation Controller system shall be described and tested to operate in a high electrical noise environment.

d The Programmable Automation Controller shall have the capability of addressing up to 128000 discrete points or 4000 analog points. It shall also have the ability to communicate with up to 250 connections that contain I/O.

These calculations are based upon the connection limitation of the controller (i.e. 250 connections * 16 channels per module = 4000 analog points) (i.e. 250

JUNE 2026 16942-2 CONTROL SYSTEM EQUIPMENT

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project connections * 16 slots * 32 points per module = 128,000 digital points).

e Each input and output module shall be self-contained and housed within a chassis. These chassis, with their respective modules, shall contain up to 512 (16 modules x 32pts/module, using a 17 slot chassis) unique points.

f The Programmable Controller shall have the ability to communicate with multiple distributed I/O racks or devices configured with multiple I/O modules.

g The Programmable Controller shall include as an optional feature the capability of addressing remote input and output modules on ControlNet and EtherNet/IP.

h Real Time Produced/Consumed Connections can made and data seamless exchanged between multiple Controllers i The Programmable Automation Controller shall use multiple independent asynchronous scans. These concurrent scans shall be designated for processing of input and output information, program logic, and background processing of other controller functions.

j The Programmable Automation Controller shall have the ability to support multiple data communications networks DH-485, DeviceNet, Ethernet/IP, Modbus RTU using communications modules. Communications modules shall be provided as indicated on the system block diagram and other Contract drawings.

k The Programmable Controller shall have at least one dedicated serial port, which supports RS-232-C signals.

It shall be accessible in control logic and provide support for DF1 Master, DF1 Point to point, DF1 Slave and DH- 485 communication protocols. Alternatively, it must be usable for programming and data monitoring purposes.

The serial port will also provide support for ASCII communications.

l The Controller shall have at least one dedicated Ethernet/IP port.

m Modules are defined herein as devices that plug into a rack and are keyed to allow installation in only one direction. The design must prohibit upside down insertion of the modules as well as safeguard against the insertion of a module into the wrong slot or chassis via an electronic method for identifying a module. Electronic

JUNE 2026 16942-3 CONTROL SYSTEM EQUIPMENT

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project keying performs an electronic check to insure that the physical module is consistent with what was configured.

n PLC Processor i The CPU shall be a self-contained unit, and will provide control program execution and support remote or local programming. This device will also supply I/O scanning and inter-processor and peripheral communication functions.

ii The user program and data shall be contained in battery backed memory. The operating system firmware shall be contained in non-volatile memory.

An option shall be possible to store both the user program and system firmware in a non-volatile memory for backup/restore purposes.

iii The operating system firmware can be updated via a separate update tool to allow for easy field updates.

The 1756-L7x controllers shall allow the operating system to be updated using a suitably configured CompactFlash card.

iv The controller shall contain a minimum of 4 Mbytes of user memory.

v In a single chassis system all system and signal power to the controller and support modules shall be distributed on a single backplane. No interconnecting wiring between these modules via plug-terminated jumpers shall be acceptable.

vi The CPU within the system shall perform internal diagnostic checking and give visual indication to the user by illuminating a “green” (OK) indicator when no fault is detected and a “red” (OK) indicator (Blinking or Solid) when a fault is detected.

vii The front panel on the Controller shall include color indicators showing the following status information:

Program or Run mode of the controller The fault status of the controller.

I/O status RS-232 activity Battery status Force LED

JUNE 2026 16942-4 CONTROL SYSTEM EQUIPMENT

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project o The front panel of the Controller shall include a mounted keyswitch. The key shall select the following Controller modes: RUN – No control logic edits possible, program always executing; PROGRAM – Programming allowed, program execution disabled; and REMOTE – Programming terminal can make edits and change processor mode, including test mode, whereby the logic

executes and inputs are monitored, but edits are not permanently active unless assembled.

p The Controller shall include a holder and a connector for a lithium battery. The battery shall provide power backup for user programs and data when the main power supply is not available.

q The front panel of the Controller shall include at least one 9-pin D-shell serial RS232 port, which supports DF1, DH- 485 (messaging only no programming) and ASCII protocols.

r All system modules, local and remote chassis shall be designed to provide for free airflow convection cooling.

No internal fans or other means of cooling, except heat sinks, shall be required.

s All system modules including the controller may be removed from the chassis or inserted in to the chassis while power is being supplied to the chassis without faulting the controller or damaging the modules. This is known as Removal and Insertion Under Power (RIUP).

Alternately a software configurable option shall exist to fault the controller if required.

2.1.2.2 Chassis a The PLC Chassis shall be a minimum 10-slot chassis, unless otherwise noted. The chassis shall accept PLC slot type modules to provide backplane connections. The chassis shall accept the processor, all integrated I/O modules and all communications modules with communications provided through the backplane.

b At least one spare slot shall be provided on each rack.

2.1.2.3 Power Supplies a The Programmable Automation Controller shall operate in compliance with an electrical service of 85 to 265 VAC (120 to 220 VAC nominal), single phase, in the frequency range from 47 to 63 Hz.

JUNE 2026 16942-5 CONTROL SYSTEM EQUIPMENT

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project b A single main power supply shall have the capability of supplying power to the CPU and local input/output modules. Other power supplies shall provide power to remotely located racks.

c The power supply shall automatically shut down the Programmable Controller system whenever its output power is detected as exceeding 125% of its rated power.

d The power supply shall monitor the incoming line voltage for proper levels. When the power supply is wired to utilize AC input, the system shall function properly within the range of 85 to 265 VAC. When the power supply is wired to utilize DC input, the system shall function properly within the range of 18 to 32 VDC.

e Design features of the Programmable Controller power supply shall include a diagnostic indicator mounted in a position to be easily viewed by the user. This indicator shall provide the operator with the status of the DC power applied to the backplane. In addition, a means of disabling power to the CPU shall be possible from a power disconnect switch mounted in a position easily accessible by the operator.

f At the time of power-up, the power supply shall inhibit operation of the processor and I/O modules until the DC voltages of the backplane are within specifications.

g In addition to the electronic protection described above the power supply shall offer a failsafe fuse that is not accessible by the customer.

2.1.2.4 Input/Output Modules a The Input/Output (I/O) Modules shall be slot type and compatible with the PLC processor. Each module shall be provided with the associated terminal block, wiring arm to connect panel wiring to the module.

b Discrete Input (DI) Modules: 24 Volt DC, 16 point input module suitable for use with input devices such as push buttons, switches, motor starter contacts, and annunciator panels. The module shall have 1500 V AC opto-electrical isolation, LED status indication, and noise filtering. The module shall be provided for either a sink or source input. Provide Allen Bradley Model 1769-IQ16.

c Discrete Output (DO) Modules: 100/240 Volt AC, 16 Point Output Module for use with 120 VAC output relays.

Each output shall operate an interposing control relay mounted in the I/O cabinet. The contacts of the relay

JUNE 2026 16942-6 CONTROL SYSTEM EQUIPMENT

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project shall control such devices as motor starter coils and pilot lights. The module shall have an output rating of 8 amperes maximum and a continuous current rating of 1 amperes at 24 VDC per output, and has 1500 V AC optoelectrical isolation. The module shall be configured to either last state or reset in the vent of a module fault.

Provide Allen Bradley Model 1769-OW16.

d Analog Input (AI) Module: Converts 8 differential analog signals to proportional twelve-bit binary values. The module shall accept 4-20 mA signals from devices such as transmitters and analyzers. The module shall be suitable for 2 wire systems. The input power for each signal shall be derived from an external 24 volt DC power supply. The accuracy of the module shall be 0.1% of range at 25 degrees C. Provide Allen Bradley Model

1769-IF8.

e Analog Output (AO) Module: Converts integer or floating point values to eight analog output signals with 15-bit resolution. The module shall output a 4-20 mA DC signal to such devices as variable frequency drives and modulating valve actuators. The analog output shall be capable of driving 500 ohms load without adjustment.

The system power shall be provided through the I/O chassis backplane. Provide Allen Bradley Model 1769- OF8C.

2.1.2.5 Program Creation and Storage a The program storage medium shall be of a battery backed RAM.

b The controller shall contain a minimum of 4 Mbytes of user memory.

c The controller will write all variable data to internal nonvolatile memory storage (Flash) during the power down cycle.

d Memory shall contain battery back-up capable of retaining all stored program data through a power failure.

A low battery condition must be detectable in ladder logic, but shall not automatically generate a major fault. A low battery condition will generate a minor fault and will be detectable in ladder logic and will be indicated on a diagnostic indicator mounted on the front of the controller.

e The controller shall have the capability to insure, that if required modules in the chassis are flashed using the

JUNE 2026 16942-7 CONTROL SYSTEM EQUIPMENT

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project firmware files stored on the CompactFlash card, to the correct revision level for the project.

f The CompactFlash shall support a Windows file system allowing multiple files to be stored on the card. The user can manually trigger the controller to save or load from CompactFlash and also configure the controller to load from CompactFlash on power up.

g The operator should be able to backup volatile memory, including data and program logic onto a personal computer storage device.

h All user memory in the processor not used for program storage shall be allocable from main memory for the purpose of data storage. The Programmable Controller system shall be capable of storing 3 data types:

i Predefined ii User-defined iii Module-defined i Controller programs shall have immediate access to the subelements of control structures by address and subelement mnemonic, such as timer accumulator value, timer done bit, or PID Process Variable value.

2.1.2.6 Interfacing and Peripherals a The programming software shall be on a workstation running the current Windows OS.

b The workstation shall have the capability to be remotely located a maximum of 10,000 cable feet (3048 meters) from the controller over DH+ at 57.6 K-Baud or a maximum of 3280 cable feet (1000 cable meters) from the controller over ControlNet. The programming software shall also be able to connect via Ethernet or RS232 for remote access.

c The Programmable Controller system shall be able to interface with a data terminal, which is RS-232-C compatible (up to 38400 baud) to generate hard copy messages.

d The system shall have the capability to interface to a floppy disk, CD-ROM, DVD and/or a hard disk for loading a user program into, or recording the contents of, the controller's memory. It shall be possible to load or record the entire contents of memory.

JUNE 2026 16942-8 CONTROL SYSTEM EQUIPMENT

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project e It shall be possible to use Windows “copy/paste” to easily duplicate all or parts of the controller program within the same project or across multiple projects open on the same workstation.

f The ability to create libraries of controller programs is required using the standard programming software.

2.1.2.7 PLC Programming a The programming format shall be IEC 1131-3 compliant Ladder Diagram (LD) only.

b The controller shall organize user applications as Tasks, which can be specified as continuous, periodic, or event based.

c Periodic tasks shall run via an interrupt at a user-defined interval in one microsecond increments from 1 millisecond to 2000 seconds.

d The periodic and event tasks shall have an associated, user assignable priority from one to fifteen (one being the highest priority), which specifies that task’s relative execution priority in the multitasking hierarchy.

e The controller shall be able to accommodate a maximum of 32 individual tasks of which one can be continuous.

f The periodic and event tasks shall have an associated, user assignable priority from one to fifteen (one being the highest priority), which specifies that task’s relative execution priority in the multitasking hierarchy.

g The event task can be triggered software events (event instruction).

h Each task shall have a user settable watchdog timeout which is unique to that task.

i Each program can include routines programmed in LD, FBD, SFC, or ST languages. One of the routines can be specified as the main routine and one can be specified as an optional fault routine. All routines shall be capable of being edited when on-line. The number of routines which can be contained in a program is limited only by memory.

j Variables within the controller shall be referenced as unique, default or user defined tags.

k Tags may be created off-line, on-line and at the same time the routine logic is entered.

JUNE 2026 16942-9 CONTROL SYSTEM EQUIPMENT

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project l The system shall have the capability to store user tags names in the controller.

m Tags shall be available to all tasks in the controller (Controller Scoped) or limited in scope to the routines within a single program (Program Scoped) as defined by the user.

n The ability to program control logic via tags of the Programmable Automation Controller shall exist.

o It shall be possible to program ladder diagram rungs with the following restrictions:

i Series instruction count limited only by user memory.

ii Branch extensions limited only by user memory.

iii Branch nesting to six levels.

p The Programmable Controller shall use a signed double integer format ranging from -2,147,483,648 to +2,147,483,648 for data storage of the counter preset and accumulated values.

q The Programmable Controller shall store data in the following formats:

i Boolean values (o or 1).

ii Short integer numbers ranging from -128 to + 127 iii Integer numbers ranging form -32,768 to +32,767 iv Double integer numbers ranging from -2,147,483,648 to +2,147,483,647 v Floating point numbers consisting of eight significant digits. For numbers larger than eight digits, the CPU shall convert the number into exponential form with a range of plus/minus 1.1754944 E -38 to plus/minus

3.402823 E +38

r The Programmable Controller shall have support for integer and floating point signed math functions consisting of addition, subtraction, multiplication, division, square root, negation, modulus, and absolute value.

s It shall be possible to complete complex, combined calculations in a single instruction, such as flow totalizing or equations of the format ((A+((B-C)*D))|E).

t Arrays shall be configurable with one, two or three dimensions.

JUNE 2026 16942-10 CONTROL SYSTEM EQUIPMENT

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project u The CPU shall support indexed addressing of array elements.

v The Programmable Controller shall provide a master system.

w For any module specifically associated with the Programmable Automation Controller, it shall be possible to configure operation and query the current status of all channels through controller scoped tags without any programming.

x The system shall contain instructions, which will construct word shift registers (SQI, SQO, and SQL). Additional instructions shall be provided to construct synchronous bit shift registers (BSR and BSL).

y The Programmable Automation Controller shall provide a master system clock that will allow synchronization of all axes in the chassis local to the controller.

z In applications requiring repeatable logic it shall be possible to place such logic in a subroutine section.

Instructions which call the subroutine and return to the main program shall be included within the system. It shall be possible to program several subroutines and define each subroutine by a unique program file designator. The processor will support nesting of subroutines up to available stack at the moment of the call. It shall be possible to pass selected values (parameters) to a subroutine before its execution.

aa The system shall have the capability to enter rung comments above ladder diagram rungs. These comments may be entered at the same time the ladder logic is entered.

bb The capability shall exist for adding, removing, or modifying logic during program execution in routines of LD, FBD, SFC languages. When changes to logic are made or new logic is added it shall be possible to test the edits of such logic before removal of the prior logic occurs.

cc It shall be possible to manually set (force) either on or off all hardwired discrete input or output points from the programming panel. It shall also be possible to manually set (force) an analog input or output to a user specified value. Removal of these forced I/O points shall be achieved either individually or totally through selected keystrokes.

JUNE 2026 16942-11 CONTROL SYSTEM EQUIPMENT

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project dd A means to program a fault recovery routine shall exist.

When a major system fault (Controller Fault) occurs in the system, the controller fault recovery routine shall be executed and then the system shall determine if the fault has been eliminated. If the fault is eliminated, program execution resumes. If the fault still exists, the system will shut down.

ee The controller shall support Master Control Reset (Relay) type functionality to selectively disable sections of logic.

ff The controller shall include direct support of FOR-NEXT loop constructions.

gg The controller shall include the ability to create user defined instructions that are re-usable in one or multiple projects/applications. These instructions will allow for the encapsulation of code developed by the user using the standard instruction set and other add-on instructions.

The user defined instructions can be instantiated multiple times, each instance of the instruction having its own backing data and the ability to create custom online help for each user defined instruction.

hh The controller shall have the ability to create alarm instructions allowing for a single point of configuration for all alarms within the controller. The alarm data can then be read by a management system such as Factory Talk Alarms & Events and presented across the enterprise to HMI and other systems.

2.1.2.8 Programming Software a The PLC programming software shall be supplied by the Contractor, and be of the same manufacturer as PLC.

The programming software shall run on a laptop or personal computer, and provide the means for directly entering, debugging, and documenting the Ladder Logic or special function program, both on-line and off-line.

Provide all cabling and accessories for direct connection to the PLC. The software shall be the latest version, with provisions, modules, and software for all communications. The software shall be licensed to Queen Anne’s County, Maryland, Wastewater Maintenance Superintendent, Department of Public Works.

b The PLC programming software shall be provided as part of the bid allowance and provided to the County. The system supplier shall use their own software of the same

JUNE 2026 16942-12 CONTROL SYSTEM EQUIPMENT

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project version as provided to the County for all required programming and integration.

2.1.2.9 Expansion Input/Output Rack a The expansion input/output rack shall be din rail mounted and connect directly to the other expansion I/O racks though expansion cables.

2.1.3 CONTROL SYSTEM NETWORK

2.1.3.1 General a The control system network shall consist of four different communications protocols.

b PLCs, OITs shall communicate via Ethernet network Cat 6 shielded cable as shown on drawings.

2.1.3.2 Ethernet Network a Ethernet communications interface module shall provide a gateway from the ControlNet to the Ethernet. Module shall mount within the PLC chassis, as shown on the drawings. Provide Allen Bradley Model 1769-L33ER.

2.2 MANUFACTURERS

2.2.1 Provide ControlLogix 1769 PLC manufacturer by Allen Bradley.

2.3 DESIGN CONDITIONS

2.3.1 The PLC, OIT and associated hardware shall have the following ratings:

2.3.1.1 Temperature 0 to 50 C ambient 2.3.1.2 Humidity 5% to 95% relative humidity (non-condensing) 2.3.1.3 Power 120 VAC, 60 Hz

3.0 EXECUTION

3.1 Refer to Section 16900.

END OF SECTION

JUNE 2026 16942-13 CONTROL SYSTEM EQUIPMENT

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 16946

CABINETS, PANELS, CONSOLES, AND DEVICES

1.0 GENERAL

1.1 SECTION INCLUDES

1.1.1 This section includes requirements for materials, and installation of the cabinets, control panels and consoles to be provided by the instrument system supplier under Section 16900. A list of Control Panels specified for this project can be found at the end of this section, “Table 16946-01 – Control Panel List”

1.2 QUALITY ASSURANCE

1.2.1 Comply with applicable portions of section 16010.

1.3 SUBMITTALS

1.3.1 Submit shop drawings and catalog data in accordance with section 01300 and Section 16900.

1.4 SPECIAL TOOLS AND SPARE PARTS

1.4.1 Provide spare parts recommended by the manufacturer.

1.5 PRODUCT DELIVERY, HANDLING AND STORAGE

1.5.1 Delivery, handle and store the equipment in accordance with section 01200 and the manufacturer’s instructions.

1.6 RELATED WORK SPECIFIED ELSEWHERE

1.6.1 16010 – General Electrical 1.6.2 16900 – General Control System Requirements

2.0 PRODUCTS

2.1 GENERAL

2.1.1 NEMA 12 Cabinets And Enclosures 2.1.1.1 The NEMA 12 cabinets and enclosures shall be floor or wall mounted enclosures, unless otherwise shown, suitable for a damp and dusty environment. Access door shall have continuous hinges with neoprene gaskets, with 3-point latch system. Cabinets shall be constructed from formed 12-gauge steel. All exposed edges and welds on the enclosure shall be ground smooth.

2.1.1.2 The exterior of the enclosure shall be painted with a rustinhibiting primer and two coats of epoxy gray paint.

JUNE 2026 16946-1 CABINETS, PANELS,

CONSOLES, AND DEVICES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.1.1.3 The interior shall be provided with a formed 12-gauge subpanel for attaching surface-mounted components and a hinged subpanel for front panel mounted hardware. All components shall be attached with screws and the subpanel shall be threaded. Rivets on back of panel nuts shall not be allowed.

Each interior shall be equipped with an incandescent lamp, 120- volt 15-ampere duplex GFI receptacle and two single-pole, 15- ampere, 120-volt circuit breakers. One circuit breaker shall be for the lights and outlets. The other circuit breaker shall be for the PLC and instrumentation equipment. The interior shall be painted with two coats of white enamel paint. Refer to instrumentation drawing for enclosure size and installation

details. The NEMA 12 cabinet shall be a Hoffman NEMA 12, or equal.

2.1.2 NEMA 4X Cabinets and Enclosure 2.1.2.1 NEMA 4X cabinets shall be floor-mounted or wall mounting as shown on the drawings. Fabricated from stainless steel or fiberglass, as specified. Access door shall have continuous hinge and hasps for locking.

2.1.2.2 Interior requirements shall be the same as NEMA 12 enclosure.

The NEMA 4X cabinet shall be Hoffman NEMA 4X, or equal.

2.1.2.3 Provide door mounted fold down table for PC.

1.1.1 NEMA 7 Cabinet And Enclosures 2.1.2.4 Provide NEMA 7 explosion proof enclosures cabinets for hazardous areas Class 1 Div 1 and 2. The panels shall be floormounted or wall mounting as shown on the drawings.

2.1.2.5 Panel shall meet the following:

a Corrosion resistant, copper free aluminum.

b Type 4 watertight gasket.

c Stainless steel cover bolts for type 4X corrosion protection d UL approval 2.1.2.6 Contract to coordinate panel layout and entry the conduit size with panel supplier before shipping.

2.1.2.7 The NEMA 7 cabinet shall be Adalet, or equal.

1.1.2 UPS System 2.1.2.8 Provide an on-line UPS to protect the PLC from line disturbance, subcycle power losses, and power outages. In normal operation, the a-c power shall be rectified to d-c power. The d-c power from

JUNE 2026 16946-2 CABINETS, PANELS,

CONSOLES, AND DEVICES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project the charger shall maintain the batteries at full charge. When line power fails, the inverter shall change the battery d-c power pack to a-c while it regulates and provides a sine wave power to the load. The load shall automatically transfer to the inverter a-c line in less than 10 milliseconds. The UPS shall be complete with power indication, inverter circuit breaker protection, power fail,

and low battery alarm relay contacts. Batteries shall be sealed, leakproof and maintenance free, mounted in a separate battery rack. UPS unit shall come complete with internal battery charger and battery connect cables.

2.1.2.9 The UPS system shall have the following requirements:

a Input/Output Voltage: 120-volt a-c, single phase 60 Hz.

b Minimum Output Rating: 1000 VA at each PLC Cabinet.

c Output Harmonic Distortion: 5% maximum at full load.

d Frequency Stability: +/-0.5%.

e Overload Capacity: 125% for 10 minutes.

f Maximum Charge Rate with Load: 20 amperes.

g Minimum Run Time: 30 minutes at half load.

2.1.2.10 A shelf mounting bracket assembly shall be provided for mounting the UPS inside PLC cabinets. All wiring and conduit between the PLC and UPS shall be provided and installed by the System Supplier.

2.1.2.11 The UPS systems shall be manufactured by Eaton Powerware or equal.

1.1.3 Panel Control Circuit Devices And Components 2.1.2.12 General: All components, except those on the front panels, shall be mounted behind on fixed or swing-out panels; terminal blocks for field connections shall be mounted on fixed channels located near the bottom of the sections but clear of the conduit entry area.

Fixed panels shall be located so as not prevent access within the cabinets to other components, wiring, and terminal blocks on fixed panels or front panels.

2.1.2.13 Control Relays: Control relays shall have either 24-volt d-c or 120-volt a-c coils. Control relays shall be 10-ampere, 300-volt, DC relays shall be blade type and AC relays shall be pin type with dust cover, LED indication, and sockets. All relays shall be of one manufacturer; Struthers-Dunn, Potter-Brumfield, or equal.

2.1.2.14 Circuit Breakers: Circuit breakers shall be din rail mounted, single-pole, 120 volt, 15-ampere rating.

JUNE 2026 16946-3 CABINETS, PANELS,

CONSOLES, AND DEVICES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.1.2.15 Wire marking: Each signal and circuit conductor connected to a given electrical point shall be designated by a single unique number which shall be shown on all shop drawings. These numbers shall be marked on all conductors at every terminal using white numbered wire markers which shall be Thomas & Betts sleeve markers, T&B Shrink-Kon, or equal.

2.1.2.16 Terminal Blocks: Terminal block shall be high-density type molded plastic with barriers and box lug terminals and shall be rated 25 amperes at 300 Volts. White marking strips, fastened securely to the molded sections shall be provided with printed wire numbers or circuit identifications. Terminal screws will be accessible with a standard size narrow blade screwdriver.

Provide minimum 25% spare terminal blocks mounted in each cabinet. Terminal blocks shall be Phoenix Contact Type UK with mounting rail or equal.

2.1.2.17 D-C Power Supplies: Provide dual d-c power supplies with relay monitored backup at all locations requiring d-c circuits. Each power supply shall be enclosed and include internal short-circuit protection. Current requirements of connected equipment shall not exceed 75% of manufacturer maximum rating.

2.1.2.18 Receptacles: Duplex receptacles shall be molded composition, ivory, specification grade. Duplex receptacles for 120-volt, singlephase, 3-wire service to be rated 20 amperes, 125 volts, back or side wired, NEMA Type 5-20R. Provide ground fault interrupter type where indicated.

2.1.2.19 DC Signal Conditioner: Provide a DC Signal Conditioner where required to drive or isolate loads. The signal conditioner shall have input and output ranges compatible with the associated equipment. The DC input/output isolation shall allow up to 600 V differences between grounds. The conditioner shall have an accuracy of +/-0.1% of input span, a zero and span adjustment and a maximum response time of 100msec. The operating

temperature range shall be 0 to 60 degrees C. Power for the signal conditioner shall be 120 VAC at 60 Hz. Provide an Action Instruments Action Pak Model 4300, or equal.

2.1.2.20 Push Buttons, Selector Switches, and Indicating Lights: Push buttons, selector switches, and indicating lights shall be heavy duty, 30.5 mm, oiltight type with synthetic rubber boots and include any special gasketing required to make the installation watertight. Indicating lights shall be LED cluster push-to-test transformer type. Provide Allen-Bradley Bulletin 800H; Square D Class 9001, Type SK; or equal.

JUNE 2026 16946-4 CABINETS, PANELS,

CONSOLES, AND DEVICES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.1.2.21 Transient Voltage Surge Suppressor: The AC power line protector shall be a solid state low pass non-linear filter to protect the cabinet equipment from spikes, transients, and noise on incoming AC power lines. The protector shall be rated 120 volts A-C, 15 amps, 60 Hz. Refer to section 16670 for specifications.

2.1.2.22 I/O Signal Surge Suppressors a Surge suppression shall be provided for each analog signal which exits the room/building where the PLC cabinet is installed. Refer to Specification Section 16670.2.04.

b Surge suppressors shall be mounted on a universal mounting rail. They shall be wired in the circuit so as to protect the PLC equipment from electrical transients whose source is external to the enclosure.

c Surge suppressors shall be rated at the nominal power supply voltage of the circuit they are protecting.

d Digital I/O signal surge suppressors shall meet the following:

i Common power for the input points on each input module shall be protected from incoming transients by the furnishing of a surge suppressor the PLC input and the incoming signal. The surge suppressor shall as a minimum include a gas filled discharge tube, a metal oxide varistor and a series coil. The maximum series resistance at 100 Hz shall be 50 Ohms. At one megahertz at least 30 decibels of attenuation shall be

provided. The rated operating current shall be one to two Amps.

2.1.2.23 Panel Heating Devices a Furnish thermostatically controlled fan-driven electric heater units on enclosures mounted in exterior locations.

Heaters shall be capable of maintaining an inside air temperature of 50 degrees F based on an outside air temperature of 30 degrees F. Air sensing thermostats shall be adjustable from 0 degrees F to 100 degrees F.

Heaters shall be Hoffman Designaire, or equal.

2.1.2.24 Intrinsically Safe Relay/Barrier a An intrinsically safe relay/barrier shall be installed in the control panel for all switching devices located in hazardous locations.

2.1.3 Panel Control Circuit Wiring

JUNE 2026 16946-5 CABINETS, PANELS,

CONSOLES, AND DEVICES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.1.3.1 Instrumentation signal cables shall be of the type used for process control with shielded pairs or triads with polyvinyl jacket and overall shield over the multiple pairs or triads. The instrumentation cable shall be rated 300 volts at 90 C or better.

The size of the instrumentation cable shall be AWG No. 16 with seven strands minimum, unless otherwise specified elsewhere.

All instrumentation cables shall meet all the requirements of IPCEA S-61-402 and shall be UL listed.

2.1.3.2 120-volt a-c wiring within the panel shall be AWG No. 14 MTW or THHN. Main power (120-volt a-c) to the panels shall be wired using color coded AWG No. 12. A-C power to all system power supplies, CRTs, printers, and computers, shall be accomplished using molded 3-wire plug cords.

2.1.3.3 Wires shall be color coded in accordance with the following table:

a BLACK L1(hot) b WHITE L2(neutral) c RED a-c control circuits d BLUE d-c circuits e YELLOW Interlock control circuits wired from an external power source f GREEN Equipment ground 2.1.3.4 All interfacing between the cabinet and the field shall be accomplished at a terminal strip (TB-1). No internal panel wiring shall be connected to terminals on the “field side” of TB-1.

Likewise, no field wiring shall be connected to terminals on the ‘panel side’ of TB-1.

2.1.3.5 Wiring run from components on a swing-out panel to other components on a fixed panel shall be made up in tied bundles.

These shall be tied with nylon wire ties and shall be secured to panels at both sides of the hinge loop so that conductors are not strained at terminals.

2.1.3.6 Wiring run to control devices on the front panels shall be tied together at short intervals and secured to the inside face of the panel using Panduit adhesive mounts with Eastman No. 910 adhesive.

2.1.3.7 Wiring to rear terminals on panel-mount instruments shall be run in plastic wireways secured to horizontal brackets run above or below the instruments in about the same plane as the rear of the instruments.

JUNE 2026 16946-6 CABINETS, PANELS,

CONSOLES, AND DEVICES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.1.3.8 Conformance to the above wiring installation requirements shall be reflected by details shown on the shop drawings for the Engineer’s review.

2.1.3.9 Signal conditioners and control interface relays shall be provided wherever proper instrument interfacing dictates use of these components. Each auxiliary device shall be assigned a tag number and shall appear on the panel shop drawings.

2.1.3.10 All electrical devices within the panel shall be identified by tag number, machine printed on a label visible from the panel interior.

Labels shall be laminated plastic with an adhesive backing. The labels shall be consistent in size throughout the panel.

2.1.3.11 All electrical devices within the cabinet, or fed from the cabinet, shall have independent disconnecting means with overcurrent protection.

2.1.3.12 All panels shall be fabricated by a system supplier who is a recognized Underwriter’s Laboratories (UL) Industrial Control Panel Fabricator. Each panel shall include certification and a label which states that it has been fabricated within the standards of UL 508 for non-hazardous installations and UL 698A for hazardous installations. Only labeled panels produced by recognized UL panel manufacturers shall be considered

acceptable for use on the project. NEMA ratings for enclosures shall be retained with UL Certification.

2.1.4 Managed Ethernet Switch 2.1.4.1 Provide a 10/100/1000 FX/TX management Ethernet switch for integration of the local control station networks.

a The switch shall meet the following requirements:

i Ethernet Interfaces ii Complies with IEEE 802.3, 2 iii 2 priority classes in acc with IEEE 802.1 P iv TCP/IP protocol v Integrated web server function vi Multicast filtering vii IGMP snooping viii VLAN ix Port security b Configuration/Diagnostic

JUNE 2026 16946-7 CABINETS, PANELS,

CONSOLES, AND DEVICES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project i Web-based management, SNMP Serial Factory Manager ii Port status indication c Power i 24VDC or 120 VAC, 60 Hz ii If 24 VDC switch is provided, provide required power supply.

d Provide number of TX and FX ports as shown on drawings, as a minimum.

e Manufacturer i Provide Ethernet Switch manufacturer by N-TRON, or equal.

2.2 MISSION UNIT

2.2.1 Mission unit shall be provided as a complete system including all necessary hardware for installation including cellular radio, enclosure, transformer, antenna with cable, and mounting hardware.

2.2.2 The Mission unit shall monitor alarms and signals and send messages to cellphone, email, or other telephone devices and shall display on web page.

2.2.3 The Mission unit shall include the following:

2.2.3.1 LCD graphic display (128x64 pixels) 2.2.3.2 LED backlight - Sunlight readable 2.2.3.3 The I/O module shall have the following features:

a 16 digital inputs b 3 relay outputs c 2 analog inputs 2.2.3.4 Battery System a Provide a battery for backup power rated for 12V with minimum of 5AH of up to 18 hours of backup power.

2.2.3.5 Cellular Radio a Shall make live, continuous, encrypted TCP socket connections. Payload shall be end-to-end acknowledged and shall be SIM capable for current available carriers.

b Antenna shall be Omnidirectional antenna with 11’ cable, SMA termination, universal mounting bracket.

2.2.3.6 Warranty

JUNE 2026 16946-8 CABINETS, PANELS,

CONSOLES, AND DEVICES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project a Provide 1 year manufacturing and material warranty.

2.3 WIFI WIRELESS NETWORK

2.3.1 Wi-Fi coverage area is the entire fenced area of the wastewater treatment plant and the new Administration Building. The System Integrator shall provide the number of Wi-Fi radios as shown on the drawings. All wiring, hardware, and connection means shall be in compliance with the National Electrical Code and/or applicable local codes.

2.3.2 Mounting and wiring:

2.3.2.1 All radios shall be mounted on a DIN rail conforming to DIN EN50022. Mounting foot of radio shall be constructed of metal.

2.3.2.2 Radios shall be capable of being installed side by side, with no gap or air space required for heat dissipation, with no loss of accuracy.

2.3.2.3 Radios shall be installed in control panels as shown on the drawings.

2.3.2.4 Mounting guidelines will be followed as indicated in installation instruction provided by manufacturer.

2.3.2.5 Wires shall be attached to the modules by pluggable terminal blocks that accept wire sizes from 24 to 14 AWG.

2.3.2.6 Pluggable terminal blocks will be keyed to help prevent incorrect positioning of the plug in the modules.

2.3.2.7 The terminal blocks will be clearly numbered to provide easy reference.

2.3.3 802.11N DIN-Rail Mount Radio Features:

2.3.3.1 Transmit power shall be maximum 200 mW.

2.3.3.2 The radio shall be UL listed and rated for Class 1, Division 2 areas.

2.3.3.3 Shall be approved for use in the 2.4 GHz and 5 GHz ranges, as required in FCC/CFR 47, Part 15.

2.3.3.4 Shall incorporate 2 Multiple Input Multiple Output (MiMo) antenna technology with two antenna to achieve the maximum throughput of 300 Mbps over 5 GHz at 802.11n.

2.3.3.5 Shall comply with the 802.11a/b/g/n standards.

2.3.3.6 To ensure that communication is secure and interoperable the module must support TKIP, WPA, WPA2, 802.11i security standards and 802.1X/RADIUS.

JUNE 2026 16946-9 CABINETS, PANELS,

CONSOLES, AND DEVICES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.3.3.7 The radio shall be configured through an embedded web server that is accessed through a standard browser on a PC. Device configurations can be saved on a standard SD card.

2.3.3.8 The radio shall have two Ethernet 10/100 Mbps port that supports TCP/IP, UDP and IPv4 protocols.

2.3.3.9 The radio shall support firmware upgrades via the SD card, wireless and Ethernet connections.

2.3.3.10 The radio shall support Access Point, Repeater, and Client modes for application diversity.

2.3.3.11 The radio shall support configuration via wireless or wired Ethernet network. The radio shall incorporate a mode button on the front of the radio to perform basic configuration changes. The radio shall support cluster management to configure specific radio settings for groups of radios through modifying one radio in that group.

2.3.3.12 The radio shall have LED visual indicators for displaying power, WLAN connection and LAN status and relative signal strength when in Client mode.

2.3.3.13 Input power: 24 VDC nominal, range of 10 VDC – 36 VDC.

2.3.3.14 Operating temperature: -25 ºC to 60 ºC.

2.3.3.15 Degree of Protection: IP20 2.3.3.16 Radio shall be manufactured by Phoenix Contact, FL WLAN 5111, or approved equal.

2.3.4 Omnidirectional Antenna Features (802.11N radio):

2.3.4.1 Provide quantity as indicated on the drawings and as required by the manufacturer.

2.3.4.2 Dual Band Frequency Range: 2.4 GHz – 2.5 GHz and 5.15 – 5.83 GHz.

2.3.4.3 Gain: 2.5 dBi and 5 dBi at 2.4 GHz and 5 GHz, respectively.

2.3.4.4 Impedance: 50 Ohms.

2.3.4.5 Horizontal beam width: 360º.

2.3.4.6 Vertical beam width: 30º.

2.3.4.7 Connector: Type N male.

2.3.4.8 Mounting Hardware: direct mounting on radio.

2.3.4.9 Operating temperature: -40 ºC to 70 ºC. IP68 rated.

2.3.4.10 Provide antenna cable, connectors, and surge protection for the antenna as recommended by the manufacturer.

JUNE 2026 16946-10 CABINETS, PANELS,

CONSOLES, AND DEVICES

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.3.4.11 Antenna shall be Phoenix Contact, ANT-OMNI-2459-02, or approved equal.

2.4 MANUFACTURERS

2.4.1 Refer to specific section for manufacturer.

2.5 DESIGN CONDITIONS

2.5.1 As noted herein.

3.0 EXECUTION

3.1 Refer to Section 16900.

END OF SECTION

JUNE 2026 16946-11 CABINETS, PANELS,

CONSOLES, AND DEVICES

Section 16946 - Control Panel List Sudlersville Wastewater Treatment Plant ENR Improvements Project Approx. Size HxWxD (inch) (See Item Panel ID Location / Description Mounting NEMA Power Supplier Remarks Note 1)

SUDLERSVILLE WTP

Approx. Size HxWxD (inch) (See Item Panel ID Location / Description Mounting NEMA Power Supplier Remarks Note 1) 1 Ex. Bioac CP (PLC-CB) Electrical Room / Control Building Freestanding NEMA 12 90x72x24 120VAC Contractor 2 PLC-IPS Panel Influent Pump Station inside service enclosure On Equipment Rack NEMA 12 30x24x12 120VAC Contractor 3 PAR-1-MX-1 LCS PAR Side 1 Anoxic Mixer 1 Local Control Station On Handrail NEMA 4X SST 20x16x6 N/A Contractor

4 PAR-1-MX-2 LCS PAR Side 1 Anoxic Mixer 2 Local Control Station On Handrail NEMA 4X SST 20x16x6 N/A Contractor 5 PAR-2-MX-1 LCS PAR Side 1 Anoxic Mixer 1 Local Control Station On Handrail NEMA 4X SST 20x16x6 N/A Contractor 6 PAR-2-MX-2 LCS PAR Side 1 Anoxic Mixer 2 Local Control Station On Handrail NEMA 4X SST 20x16x6 N/A Contractor 7 M-ME-CP Methanol Area / Methanol Station Control Panel Freestanding NEMA 4X SST 90x72x24 480VAC, 3PH Contractor

NEMA 4X

8 M-ME-TCP Methanol Area / Methanol Storage Tank Control Panel On Equipment Rack 12x12x6 120 VAC Contractor Corrosion Resistant Notes:

1.- Approximate Panels size shown. The panel size shall be determined by panel manufacturer per contract specifications. Contractor to coordinate panel dimensions with space available for installation of panel.

2. Limitated space on site for panel installation. Contractor shall coordinate panel dimensions with panel supplier. Panel height may be increased after coordination with Engineer/Owner.

3.- The Control List is not all inclusive of all required Control Panels for the project. Refer to Contract Drawings and other Specifications for control panel requirements.

JUNE 2026 16946-12 CONTROL SYSTEM EQUIPMENT

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project

SECTION 16965

DESCRIPTION OF OPERATION

1.0 PROGRAMMING DESIGN CRITERIA

1.1 The Control programming will be design based on the following criteria:

1.1.1 Equipment Configuration: Some of the equipment will operate in Lead/ Lag/Standby or Lead/Standby operation mode.

1.1.2 Operation mode: Equipment will be operated in the following modes:

1.1.2.1 Remote/Auto: In automatic mode, the PLC will control the operation of the respective equipment based on the PLC programming.

1.1.2.2 Remote/Manual: In manual mode, the operator will control the operation of the respective equipment through the Biolac OIT.

1.1.2.3 Local: In local mode, the operator will control the operation of the respective equipment through the local control panels or local control stations at the field.

1.1.3 Equipment status: The equipment will have the following operational status:

Status Description Color-Code Equipment is in failure condition and Amber with “Fail” text In Fail not available for operation indication.

Running Equipment is running Red Equipment is stopped, ready to run and Green Ready not in fail condition Equipment out of sequence by the Blue operator or alarm condition. The Out of service equipment can be set by the operator to “Out of Service” when in maintenance

1.2 OPERATOR INTERFACE UNIT (OIT)

1.2.1 The existing OIT is provided by the equipment manufacturer and is located at the existing Biolac CP located in the electrical room.

1.3 RELATED SECTIONS

1.3.1 11389 – Miscellaneous Biolac System Improvements

2.0 INFLUENT PUMP STATION, RECYLCE, AND RAS FLOW RATES

2.1 Description

JUNE 2026 16965-1 DESCRIPTION OF OPERATION

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 2.1.1 The major equipment for the Influent Pump Station flow rate includes:

2.1.1.1 Flow Meter (IPS-I-F-1) 2.1.2 The major equipment for the Recycle flow rate includes:

2.1.2.1 Flow Meter (RECY-I-F-1) 2.1.3 The major equipment for the RAS flow rate includes:

2.1.3.1 Flow Meter (RAS-I-F-1) 2.1.4 The flow meter signal at the Influent Pump Station shall be collected via a new radio PLC panel and transmitted over radio to the existing Biolac CP in the existing control building/electrical room via a radio enclosure/panel mounted outside the existing control building. The Biolac CP shall interpret the radio signal and convert it to a flow rate.

2.1.5 The Recycle flow will be obtained as an output from the new chart recorder located inside the control building and to a Biolac CP AI card.

2.1.6 The flow from the RAS is already connected to the Biolac PLC.

2.1.7 The flows from the recycle, influent pump station, and RAS/WAS shall be used by the Biolac CP for use in calculating the methanol feed rates to the PAR influent channel and the Biolac influent splitter box at the headworks building. Refer to section 11389.

2.2 OIT/HMI DISPLAY

2.2.1 As a minimum the following graphics shall be provided in the HMI:

2.2.1.1 Graphic display of the flows to the PAR. The display will show the following information as a minimum:

a Flow Rate at each location b Total Flow Rate to the PAR c Total Flow Rate to the Biolac influent splitter box

3.0 POST ANOXIC REACTOR (PAR)

3.1 GENERAL

3.1.1 The major equipment associated with the PAR system is as follows:

3.1.1.1 New Blower No. 1 (B-PAR-BL-1) 3.1.1.2 New Blower No. 2 (B-PAR-BL-2) 3.1.1.3 New Blower No. 3 (B-PAR-BL-3) 3.1.1.4 New PAR side 1, Mixers 1 and 2 (PAR-1-MX-1 and PAR-1-MX- 2) 3.1.1.5 New PAR side 2, Mixers 1 and 2 (PAR-2-MX1 and PAR-2-MX-2)

JUNE 2026 16965-2 DESCRIPTION OF OPERATION

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.1.1.6 New PAR influent channel Dissolved Oxygen (DO) Analyzer

(PAR-I-DO-1)

3.1.1.7 New PAR influent channel Nitrate (NO3) Analyzer (PAR-I-NO3- 1) 3.1.1.8 New PAR side 1 ORP Sensor (PAR-1-ORP-1) 3.1.1.9 New PAR side 1 Nitrate (NO3) Analyzer (PAR-1-NO3-1) 3.1.1.10 New PAR side 2 ORP Sensor (PAR-2-ORP-1) 3.1.1.11 New PAR side 2 Nitrate (NO3) Analyzer (PAR-2-NO3-1) 3.1.2 The existing Biolac Process Control System and its associated programmable logic controller PLC-BIO, located in the Biolac Control Panel

in the electrical room of the existing Control Building, will be modified as indicated herein, and in section 11389, for monitoring and controls of the equipment at the PAR area including blowers, mixers, and instrumentation.

3.1.3 A total of three (3) blowers will provide air to the PAR. Air piping to the PAR will be provide connections for the three new blowers. All blowers will operate via contact starters located the existing MCC-CB located in the electrical room of the existing control building.

3.1.4 A dissolved oxygen (DO) Analyzer will be provided at the PAR influent channel of the PAR. The DO analyzer will have a DO sensor and transmitter to assist with methanol feed pump control and overall process monitoring.

3.1.5 An ORP sensor/analyzer will be provided for each side, side 1 and side 2 of the PAR. Each ORP analyzer will have an ORP sensor and transmitter to assist with methanol feed pump control and overall process monitoring.

3.1.6 A nitrate (NO3) sensor/analyzer will be provided at the PAR influent channel.

The NO3 analyzer will have a NO3 sensor and transmitter to assist with methanol feed pump control and overall process monitoring.

3.1.7 A nitrate (NO3) sensor/analyzer will be provided for each side, side 1 and side 2 of the PAR. Each NO3 analyzer will have a NO3 sensor and transmitter to assist with methanol feed pump control and overall process monitoring.

3.2 PAR BLOWERS

3.2.1 If an equipment status is “in fail” an alarm will be displayed at the Biolac OIT, and the associated PLC will perform the following:

3.2.1.1 Lock the equipment out of the control sequence. The PLC will automatically set the equipment Out of Service until the fail condition is cleared.

3.2.1.2 The PLC will display an “Ask to Start Next Equipment” which will be confirmed by the operator once manual valves on the air lines

JUNE 2026 16965-3 DESCRIPTION OF OPERATION

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project have been open/closed to put the standby blower into the correct position.

3.2.2 Time delays: Time delays for alarm and control are defined at the PLC. The operator adjusts these variable through the OIT.

3.2.3 Equipment Run time will be calculated by the PLC, based on time in operation.

3.2.4 Password is set at the OIT for time delay modifications by the Operator.

3.2.5 Graphics/Displays: Graphics of the process will be set at the OIT for monitoring and control.

3.2.6 Alarms: A summary of the alarms will be set at the OIT.

3.3 PAR MIXERS

3.3.1 General Description 3.3.1.1 Four submersible mixers will be provided in PAR, 2 in each side.

3.3.1.2 The PAR mixer status signals will be wired to Biolac PLC.

3.3.2 PLC Inputs and Outputs 3.3.2.1 Digital Inputs:

a Auto b Thermal Fail c Seal Fail 3.3.2.2 Digital Outputs:

a Mixer shutdown 3.3.3 Description of Operation 3.3.3.1 The submersible mixers will be manually controlled through the OFF/ON selector switch located at the mixer local control panel.

The local control panels for the mixers are at the PAR. All four mixers will operate continuously and concurrently. The new mixer motor starters are to be located in the existing motor control center located in the existing electrical room of the existing control building.

3.3.3.2 If a temperature alarm is activated, the Biolac PLC will start a timer delay. If the timer times out, the temperature sensor is still activated, and the mixer is running, the mixer will be set as faulted. This will activate a thermal fail alarm and shutdown the mixer. The Biolac PLC shall display the alarm condition for each mixer locally, but send a common mixer fail alarm to the County via the RTU system.

JUNE 2026 16965-4 DESCRIPTION OF OPERATION

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.3.3.3 If a seal failure alarm is activated, the Biolac PLC will start a timer delay. If the timer times out, the seal sensor is still activated, and the mixer is running, the mixer will be set as faulted. This will activate a seal fail alarm and shutdown the mixer. The Biolac PLC shall display the alarm condition for each mixer locally, but send

a common mixer fail alarm to the County via the RTU system.

3.3.4 Displays 3.3.4.1 As a minimum, the following should be displayed on the OIT for each mixer:

a Mixer Status (On/Off) b Thermal Alarm c Thermal Fail d Seal Fail 3.3.5 Interlocks and Alarms 3.3.5.1 Regardless of operating mode, the following will de-energize the mixer:

a Thermal Fail b Seal Fail 3.3.5.2 Regardless of operating mode, the following will provide an alarm on the OIT for operator attention. The mixer will not de-energize:

a Thermal Alarm

3.4 PAR INFLUENT DISSOLVED OXYGEN MONITORING

3.4.1 General Description 3.4.1.1 A Dissolved oxygen (DO) probe will be located in PAR influent channel to monitor the dissolved oxygen content of the PAR influent and to assist with control of the PAR methanol feed pumps.

3.4.1.2 The DO probe will be wired to a transmitter which is backboard mounted on the handrail at the PAR. The transmitter signal will be sent to the existing Biolac PLC for as part of the control strategy for the PAR methanol feed pumps. Refer to 11389.

3.4.1.3 Each transmitter will display the DO and will output a 4-20mA analog signal proportional to the DO to the Biolac PLC for dissolved oxygen monitoring and as part of the control strategy for the PAR methanol feed pumps. Refer to 11389.

3.4.2 PLC Inputs and Outputs 3.4.2.1 Analog Inputs

JUNE 2026 16965-5 DESCRIPTION OF OPERATION

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project a Dissolved Oxygen 3.4.3 Description of Operation 3.4.3.1 The new DO signal will be utilized by the existing Biolac PLC in the control algorithm for the PAR methanol feed pumps.

3.4.3.2 The OIT software will display and trend DO in the PAR influent channel.

3.4.4 Displays 3.4.4.1 At a minimum, the following should be displayed at the OIT:

a Instantaneous Dissolved Oxygen b Dissolved Oxygen Trends

3.5 PAR OXIDATION REDUCTION POTENTIAL (ORP)

3.5.1 General Description 3.5.1.1 An ORP probe will be located on each side of the PAR tank to monitor the ORP of the mixed liquor near the effluent end of PAR and to assist with control of the PAR methanol feed pumps.

3.5.1.2 The ORP probes will be wired to a transmitter which is backboard mounted on the handrail at the PAR. The transmitter signal will be sent to the existing Biolac PLC for control of the PAR methanol feed pumps.

3.5.1.3 Each transmitter will display the ORP and will output a 4-20mA analog signal proportional to the ORP to the Biolac PLC for ORP monitoring and as part of the control strategy for the PAR methanol feed pumps. Refer to 11389.

3.5.2 PLC Inputs and Outputs 3.5.2.1 Analog Inputs a ORP 3.5.3 Description of Operation 3.5.3.1 The new ORP signals will be utilized by the existing Biolac PLC in the control algorithm for the PAR methanol feed pumps.

3.5.3.2 The OIT software will display and trend the ORP for each side of the PAR tank as well as the average ORP value.

3.5.3.3 An operator settable high and low setpoint shall be used to send a high or low ORP alarm to the County via the RTU system.

3.5.4 Displays 3.5.4.1 At a minimum, the following should be displayed at the OIT:

JUNE 2026 16965-6 DESCRIPTION OF OPERATION

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project a Instantaneous ORP for each side of the PAR and the average b ORP Trends for each side of the PAR and the average c High and low ORP level alarms along with operator set points for each.

3.6 PAR NITRATE MONITORING

3.6.1 General Description 3.6.1.1 Nitrate (NO ) probes will be located in PAR influent channel and 3 the two sides of the PAR to monitor the nitrate content of the mixed liquor in the PAR and to help control the PAR methanol feed pumps.

3.6.1.2 The NO probes will be wired to a transmitter which is backboard 3 mounted on the handrail at the PAR. Each transmitter will be connected to the NO probes at locations in the PAR. The 3 transmitter signal will help control the PAR methanol feed pumps.

3.6.1.3 Each transmitter will display the NO and will output a 4-20mA 3 analog signal proportional to the NO to the Biolac PLC for nitrate 3 monitoring and as part of the control strategy for the PAR methanol feed pumps. Refer to 11389.

3.6.2 PLC Inputs and Outputs 3.6.2.1 Analog Inputs a Nitrate 3.6.3 Description of Operation 3.6.3.1 The new NO signals will be utilized by the existing Biolac PLC in 3 the control algorithm for the PAR Methanol Pumps.

3.6.3.2 The OIT software will display and trend NO in the PAR for each 3 location along with an average of the effluent NO .

3 3.6.4 Displays 3.6.4.1 At a minimum, the following should be displayed at the OIT:

a Instantaneous Nitrate at each location and the average of the two effluent nitrate probes.

b Nitrate Trends at each location and the average of the two effluent nitrate probes.

3.7 METHANOL METERING PUMPS (I-ME-P-1, I-ME-P-1, PAR-ME-P-1, PAR-ME-P-

2) 3.7.1 Digital Inputs

3.7.1.1 H/O/A

JUNE 2026 16965-7 DESCRIPTION OF OPERATION

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 3.7.1.2 High Pressure 3.7.1.3 Pump Run 3.7.1.4 Low Pressure/Pump Leak 3.7.2 Digital Outputs 3.7.2.1 Pump Start/Stop 3.7.3 Analog Outputs 3.7.3.1 Speed Control 3.7.4 Methanol Feed Pump 3.7.4.1 The four methanol feed pumps are controlled by the Biolac PLC for automatic control for the methanol dosing. See section 11389 for additional information.

3.7.4.2 When the H/O/A switch is in the “hand” position the speed rate of the pump can be entered into the VFD. When the feed pump H/O/A switch is in “auto” the pump will be controlled automatically by the Biolac PLC from a 4-20 mA signal from one of the automatic control features.

3.7.4.3 For methanol control the Biolac PLC will provide control of the Methanol Feed pump based on the algorithm described in

section 11389. The

PLC controller will vary the speed of the feed pump as required.

3.8 METHANOL TANK

3.8.1 Digital Inputs 3.8.1.1 High Level 3.8.1.2 Low Level Alert 3.8.1.3 Leak alarm

4.0 RTU

4.1 Web Portal 4.1.1 The monitoring system is completely programmed, setup, and configured using a standard web browser by the RTU vendor. All connected equipment can be monitored and configured from an internet connected device.

4.1.2 Proprietary programming software or skills shall not be required. Systems that require proprietary programming software or cryptic telephone or cellular interfaces will not be considered. The monitoring system shall be capable of being deployed anywhere in the United States, Canada, or Mexico without coordination with the local telephone company. There shall be no long distance telephone charges for equipment.

JUNE 2026 16965-8 DESCRIPTION OF OPERATION

QUEEN ANNE’S COUNTY, MD

Sudlersville Wastewater Treatment Plant ENR Improvements Project 4.1.3 Upon successful login to the web site, the user shall be able to visualize all of the station registered to that user on an interactive map. The station icon shall be displayed on the map at the actual road location. Clicking on the station icon shall open the station page and display the following:

4.1.3.1 PAR Influent Channel Nitrate 4.1.3.2 PAR Effluent Nitrate (Average of 2 readings) 4.1.4 The user shall be able to export the generated graphs into a .pdf file for printing or to attach in an e-mail. The data shall be available in a tabular format for export into a .xls format spreadsheet for further analysis.

4.1.5 Each alarm shall be configurable to send an SMS (text) notification or/and an e-mail to one or multiple users. The system shall allow multiple users for separate login purpose and alarm notification. A log of all alarm notifications sent shall be displayed on the web site and shall be available for export into a .xls format spreadsheet for further analysis. Alarms shall be configurable to send a notification upon activation and another upon de-activation (fault

no longer active). Below is the list of alarms:

4.1.5.1 PAR influent Channel High Level 4.1.5.2 High Level in PAR Tank (Either Tank 1 or Tank 2) 4.1.5.3 Common Mixer Fail (Common fail of all 4 mixers) 4.1.5.4 Common Blower Fail (Common fail of all 3 blowers) 4.1.5.5 High Level at Methanol Sump 4.1.5.6 High Pressure PAR Methanol Pumps (common alarm for both PAR Methanol Feed Pumps) 4.1.5.7 Low Pressure PAR Methanol Pumps (common alarm for both PAR Methanol Feed Pumps)

4.1.5.8 High Pressure Biolac Methanol Pumps (common alarm for both Biolac Methanol Feed Pumps) 4.1.5.9 Low Pressure Biolac Methanol Pumps (common alarm for both Biolac Methanol Feed Pumps) 4.1.5.10 Methanol Tank Leak 4.1.5.11 Methanol Tank High Level 4.1.5.12 Methanol Tank Low Level 4.1.5.13 High ORP at PAR 4.1.5.14 Low ORP at PAR

END OF SECTION

JUNE 2026 16965-9 DESCRIPTION OF OPERATION

10975 Guilford Road, Suite A Annapolis Junction, MD 20701 Phone (410) 880-4788 Fax (410) 880-4098 www.hcea.com Corporate Headquarters - Annapolis Junction, MD Maryland  Washington, DC  Delaware  Pennsylvania  Virginia  Caribbean

ENGINEERING

ASSOCIATES

July 11, 2025 McCrone, Inc.

20 Ridgely Avenue, Suite 201 Annapolis, Maryland 21401 Attention: Ryan Rangel, P.E.

Re: Geotechnical Engineering Study Sudlersville WWTP Upgrade Queen Anne’s County, Maryland HCEA Job No. AJT250305A Mr. Rangel:

Hillis-Carnes Engineering Associates, Inc. (HCEA) appreciates the opportunity to provide our services on this project and is pleased to submit this report of our findings. The purpose of this exploration was to determine subsurface conditions at the provided boring locations with respect to the concept and design of geotechnical-related aspects of the proposed wastewater treatment plant upgrade.

INTRODUCTION

The project site is located at the existing Sudlersville Wastewater Treatment Plant, which is located at 575 Thunder Road in the Sudlersville area of Queen Anne’s County, Maryland.

A Project Location Map (Figure 1) showing the approximate location of the facility is included in the Appendix.

Based on the information provided to this office, we understand that the proposed construction at the site is to include a process tank (PAR tank). The proposed cast-in-place tank is to be roughly 27.5 ft (W) x 34.67 ft (L) x 14 ft (D) and will hold approximately 12 feet of water. The bottom of the slab for the PAR structure is to be located around El 50.5, with an estimated bottom of excavation near El 49.5. As such, the bottom of the proposed PAR

slab will be located approximately 12 ft below the existing site grade at the boring location.

Since a relatively large volume of soil will be displaced by the PAR excavation, it is anticipated that the actual net soil pressure increase below the PAR foundation will be quite small.

Also proposed at the site are a new 1,000-gallon methanol storage tank and chemical feed system. It has been assumed that the foundation pad that will support the proposed tank is to be located near existing site grades. It has been further assumed that the weight of the methanol tank, when full, will be on the order of 5 to 6 kips.

It has been assumed that settlements on the order of 1.5 inches total and 0.75-inch differential will be tolerable by the structures. If any of the project characteristics are different from those assumed, our office should be notified, as the evaluations and recommendations provided may need to be revised. Additional details concerning the proposed construction Sudlersville WWTP Upgrade Geotechnical Engineering Services

HCEA Project No. AJT250305A were not known at the time this report was prepared.

FIELD EXPLORATION

To determine the subsurface soil conditions, two Standard Penetration Test (SPT) soil borings (numbered PAR-1 and M-1) were performed in the locations of the proposed PAR structure and methanol tank, respectively. The borings were drilled to depths of 30 ft to 40 ft below the existing site grades. The approximate boring locations are shown on the Boring Location Plan (Figure 2) in the Appendix of this report. Boring locations were staked in the

field, and boring elevations were provided by the Client.

The borings were advanced with hollow-stem augers. Subsurface soils were sampled at 2.5 ft to 5.0 ft intervals. Samples were taken by driving a 1-3/8 inch I.D. (2-inch O.D.) split-spoon sampler in accordance with ASTM D-1586 specifications. The sampler was first seated 6 inches to penetrate any loose cuttings, and then was driven an additional foot with blows of a 140-pound hammer falling 30 inches. The number of hammer blows required to drive the

sampler one foot following the 6-inch seating is designated as the "Penetration Resistance" or "N" value. The penetration resistance, when properly evaluated, is an index of the soil strength and compression characteristics.

SUBSURFACE CONDITIONS

The reader is referred to the attached Records of Subsurface Exploration (boring logs) for details related to the subsurface conditions encountered in the borings. It should be noted that stratification lines shown on the Records of Subsurface Exploration represent approximate transitions between material types. In-situ, strata changes could occur gradually or at slightly different levels. Also, it should be noted that the borings depict

conditions at particular locations and at the particular times indicated. Some conditions, particularly groundwater conditions, could change with time.

The Geologic Map of Maryland (1968) shows that the project site is located in the Atlantic Coastal Plain Region, where near-surface natural soils are sedimentary materials, usually consisting of interbedded layers of granular and semi-cohesive to cohesive soils.

Surficial Cover Boring PAR-1 was performed in a gravel-covered area and showed a surficial gravel layer measuring approximately 6-inches in thickness at the tested location. Boring M-1 was performed in a grass-covered area where approximately 21-inches of topsoil were encountered surficially at the tested location. The thickness of surficial materials should be expected to vary across the site, and the thicknesses noted on the boring logs should not

be used solely to estimate surficial material thicknesses at the site.

Man-Placed Fill Materials Materials specifically identified as man-placed fill were not encountered in the samples obtained. Since the size of the samples obtained is relatively small in comparison to the areal extent of the site and since fill materials could be of similar composition to the natural

HILLIS-CARNES ENGINEERING ASSOCIATES PAGE 2 OF 8

Sudlersville WWTP Upgrade Geotechnical Engineering Services HCEA Project No. AJT250305A soils encountered at the site, it is often difficult to determine the presence and composition of fill materials from the SPT samples. It should be anticipated that man-placed fill materials may be encountered at locations and/or to different depths below the existing ground surface due to previous construction that has occurred on and around the project site.

Natural Soils The natural soils encountered at the site consisted of clay (CL), silty sand (SM), poorly graded sand (SP), and combinations thereof. The fine-grained soils were noted to have medium stiff to stiff consistency, while the more granular soils showed relative densities in the very loose to dense range.

Groundwater Groundwater observations were made during drilling operations and upon completion of drilling. Groundwater was encountered at a depth of 6+ ft below the existing site grade in each of the borings drilled.

A more accurate determination of the hydrostatic water table would require the installation of perforated pipes or piezometers, which could be monitored over an extended period of time. The actual level of the hydrostatic water table and the amount and level of perched water should be anticipated to fluctuate throughout the year, depending on variations in precipitation, surface run-off, infiltration, site topography, and drainage.

EVALUATIONS AND RECOMMENDATIONS

Our findings indicate that the site can be developed for the proposed construction. Special consideration should be given to the proper monitoring of fill operations, foundation excavation, and concrete placement in all structural areas. Structures should not be constructed on or over any existing fill materials unless they are specifically observed, tested, and approved for use by the Geotechnical Engineer or their designated

representative in the field during construction.

The following recommendations have been developed based on the previously described project characteristics and subsurface conditions. If there are any changes to the project characteristics or if different subsurface conditions are encountered during construction, HCEA should be consulted so that the recommendations of this report can be reviewed and revised, if necessary.

General Site Preparation All existing structures (including all above and below-ground construction) within the areas to be developed should be removed in accordance with the recommendations below before the initiation of new construction. We suggest that all available information regarding the existing utilities at the site be reviewed before construction.

Removal should include all existing pavements, underground pipes, utilities, and underground structures or concrete that might interfere with the new construction. There

HILLIS-CARNES ENGINEERING ASSOCIATES PAGE 3 OF 8

Sudlersville WWTP Upgrade Geotechnical Engineering Services HCEA Project No. AJT250305A may be environmental considerations associated with regulatory notification, licensure, assessment, and testing for the removal of underground tanks or pipes and associated contents and adjacent soils. Removal should be carried out in accordance with applicable regulations. An evaluation of these structures and the potential impact on the site and

proposed construction is beyond the scope of services for this exploration.

Removal should also include topsoil, unapproved man-placed materials, frozen, wet, soft, or very loose soils, and any other deleterious materials. If abandoned underground utilities are to be removed before the initiation of construction, provisions should be made in the construction specifications and budget to restore the subgrade to a stable condition.

Restoration should include backfilling and compaction of the excavation areas. These operations should be performed in a manner consistent with good erosion and sediment control practices.

Fill Selection, Placement, and Compaction All material to be used as fill or backfill should be inspected, tested, and approved by the Geotechnical Engineer. In general, the on-site soils that are free from organic and other deleterious components can be reused as general site fill. Materials suitable for various construction purposes can be identified by an experienced Soils Inspector during grading

operations.

Moisture conditioning (that is, wetting or drying) of the soils should be anticipated to achieve proper compaction. The moisture contents of the soils should be controlled properly to avoid extensive construction delays. If imported fill material is required, those materials should have Unified Soil Classifications of SM or more granular.

All fill should be placed in relatively horizontal 8-inch (maximum) loose lifts and should be compacted to a minimum of 95 percent of the Modified Proctor (ASTM D-1557) maximum dry density. Fill materials in landscape and other non-structural areas should be compacted to at least 90 percent of the Modified Proctor maximum dry density if significant subsidence of the fill under its own weight is to be avoided. Field moisture contents should be maintained

within 2 percentage points of the optimum moisture content to provide adequate compaction.

A sufficient number of in-place density tests should be performed by an experienced Engineering Technician on a full-time basis to verify that the proper degree of compaction is being obtained. New fills should be properly benched into existing slopes.

Groundwater and Drainage As stated previously, groundwater was encountered at a depth of 6+ ft below the existing site grades in both of the borings. Given the predominance of silty sands observed within 12± ft below existing grades in the borings and a groundwater water table observed at a depth of 6± ft below existing site grades, it should be anticipated that a significant dewatering system will be required during the excavation of the underground structures, particularly in

the PAR structure area.

HILLIS-CARNES ENGINEERING ASSOCIATES PAGE 4 OF 8

Sudlersville WWTP Upgrade Geotechnical Engineering Services HCEA Project No. AJT250305A Any water infiltration resulting from a shallow interception of the groundwater table, precipitation, surface run-off, or perched water should be able to be controlled utilizing sump pits and pumps, or by gravity ditching procedures. If any conditions are encountered that cannot be handled in such a manner, this office should be consulted.

Methanol Storage Tank Foundations Our findings indicate that the proposed methanol storage tank structure can be supported on a pad foundation bearing on firm natural soils, on new engineered fill placed over natural soils, or on a combination thereof. Foundations should not be supported on or over any existing fill materials unless the fill materials are specifically observed, tested, and approved

by the Geotechnical Engineer or his designated representative in the field during construction.

Based on the assumed maximum structural loads, the maximum allowable settlement, proposed foundation elevations, and the general soil conditions that were encountered, it is our judgment that a design allowable soil bearing pressure of 1,000 lbs/sq ft will be available for proportioning the pad foundation on firm, stable ground.

The foundation excavation should be inspected by a Geotechnical Engineer or an experienced soil inspector before the placement of concrete. The purpose of the inspection would be to verify that the exposed materials will be capable of supporting the design bearing pressure. If soft or loose pockets are encountered in the footing excavation, the unsuitable materials should be removed and replaced with structural fill or lean concrete

(2,000 psi).

In all areas where the foundation will be supported on structural fill, the structural fill should extend a sufficient distance laterally beyond the perimeter of the foundation pad. For design purposes, plans should reflect structural fill extending a minimum distance of 9 inches laterally beyond the pad perimeter for each linear foot of structural fill below the bearing level.

Since a net soil pressure is specified, the weights of the footing concrete and backfill need not be added to the structural loads when proportioning the footings. The pad foundation should be located at a depth of at least 30-inches below final exterior grades to provide adequate protection from frost heave.

PAR Structure Foundation As stated previously, it is our understanding that the proposed PAR structure will be founded at a depth of 12± ft below existing site grades. Based on the existing site grades and proposed bottom depth, it appears as though the PAR structure foundation will bear on the underlying very loose granular soils. The need for any undercutting below the proposed subgrade to provide a suitably firm subgrade would be minimized by utilizing

proper excavation and dewatering procedures. It is recommended that a mud mat be provided at the bottom of the excavation to protect the subgrade.

HILLIS-CARNES ENGINEERING ASSOCIATES PAGE 5 OF 8

Sudlersville WWTP Upgrade Geotechnical Engineering Services HCEA Project No. AJT250305A Our findings indicate that the proposed structure can be supported on a pad-type foundation bearing on firm natural soils. Based on the maximum anticipated loads, the maximum tolerable settlement, and the general soil conditions that were encountered, it is our judgment that an allowable design soil bearing pressure of 1,500 psf will be

appropriate for proportioning the PAR slab foundation to be supported on firm, natural materials. The exposed foundation subgrade should be inspected by a Geotechnical Engineer or experienced Soils Inspector before the placement of concrete. The purpose of the inspection would be to verify that the exposed materials will be capable of supporting the design bearing pressure. Undercuts may be required to establish stable working

conditions where loose foundation soils are encountered.

To install the vault, it will be necessary to slope the sides of the excavations and/or to provide temporary sheeting and shoring. The excavation procedures used will depend on a combination of factors, including available construction space. Temporary sheeting and shoring measures should comply with OSHA and MOSH regulations. We recommend that the existing soils should therefore be considered soil type C with respect to OSHA shoring

and sloping requirements. At a minimum, these soils should be sloped 1.5:1 (H:V) when installing the vault.

As stated previously, it should be anticipated that a significant dewatering system will be required during the excavation of the PAR structure. The contractor should consider that significant dewatering may have the potential to destabilize excavation slopes.

We recommend that the upward fluctuation of water level be considered for design.

Sufficient dead weight or anchoring will need to be provided to resist uplift forces associated with groundwater levels. Under severe conditions, groundwater could be expected to reach elevations near the existing ground surface.

Below-Grade Walls Soil parameters have been provided for use in the design of below-grade walls. The parameters outlined below consider that any below-grade walls will have horizontal backfill and will be backfilled with the on-site granular soils (SM or more granular).

• Active Earth Pressure Coefficient (K ): 0.33

• Passive Earth Pressure Coefficient (K ): 3.00

• Moist Unit Weight: 120 pcf

• Cohesion: 0 psf

• Angle of Internal Friction (φ): 30°

• Coefficient of Friction to resist sliding: 0.30

HILLIS-CARNES ENGINEERING ASSOCIATES PAGE 6 OF 8

Sudlersville WWTP Upgrade Geotechnical Engineering Services HCEA Project No. AJT250305A

REMARKS

HCEA appreciates having had the opportunity to provide the geotechnical consultation for this project. Should you have any questions concerning the contents of this report or require additional consultation, design, inspection, or testing services, please contact our Office.

Very truly yours, Hillis-Carnes Engineering Associates, Inc.

Michael P. Johnson, P.E. William S. Harris, P.E.

Chief Engineer Geotechnical Division Manager

HILLIS-CARNES ENGINEERING ASSOCIATES PAGE 7 OF 8

Sudlersville WWTP Upgrade Geotechnical Engineering Services HCEA Project No. AJT250305A

APPENDIX

Important Information about This Geotechnical-Engineering Report Figure 1. Project Location Map Figure 2. Boring Location Plan Laboratory Test Results Records of Subsurface Exploration Soil Description Sheet

HILLIS-CARNES ENGINEERING ASSOCIATES PAGE 8 OF 8

PROJECT LOCATION MAP

HILLIS-CARNES

ENGINEERING ASSOCIATES, INC. Scale: Shown Figure: 1

BORING LOCATION PLAN

HILLIS-CARNES

ENGINEERING ASSOCIATES, INC. Scale: Reduced Figure: 2

LIQUID AND PLASTIC LIMITS TEST REPORT

Tested By: Delany Midash

XEDNI

YTICITSALP

60 Dashed line indicates the approximate upper limit boundary for natural soils 50

CH

OH

40 30 20

CL

OL

10 CL-ML ML or OL MH or OH 47 0 0 10 20 30 40 50 60 70 80 90 100 110

LIQUID LIMIT

TNETNOC

RETAW

34.8 34.4 34 33.6 33.2 32.8 32.4 32 31.6 31.2 30.8 5 6 7 8 9 10 20 25 30 40 50 60 70 80 100

NUMBER OF BLOWS

MATERIAL DESCRIPTION LL PL PI %<#40 %<#200 USCS

Light brown, moist, medium stiff, lean CLAY, some sand

33.9 21.1 12.8 84.6 CL

(CL)

Project No. SAL250174A Client: HCEA-HCI Remarks:

Project: Sudlersville WWTP Upgrade Source of Sample: M-1 Depth: 0 Sample Number: 1

HILLIS-CARNES ENGINEERING ASSOCIATES

SALISBURY, MD Figure Particle Size Distribution Report Tested By: Delany Midash

RENIF

TNECREP

100 90 80 70 60 50 40 30 20 10 0 10 1 0.1 0.01 0.001 GRAIN SIZE - mm.

% Gravel % Sand % +3" % Fines Coarse Fine Coarse Medium Fine 0.0 0.0 0.8 0.4 21.2 35.0 42.6 .ni 2 .ni ½1 .ni 1 .ni ¾ .ni ½ .ni 8/3 4# 01# 02# 03# 04# 06# 001# 041# 002# SIEVE SIZE PERCENT SPEC.* PASS? Soil Description OR DIAMETER FINER PERCENT (X=NO) Brown, moist, very loose, fine to medium silty SAND (SM) 2 100.0 1.5 100.0 1 100.0 0.75 100.0 Atterberg Limits 0.5 100.0

PL= LL= PI=

0.375 100.0 #4 99.2 Coefficients #8 99.0

#10 98.8 D90= 0.6411 D85= 0.5301 D60= 0.2871

#16 97.6 D50= 0.2012 D30= D15=

#20 94.9 D10= Cu= Cc= #30 88.2 #40 77.1 Classification

#50 61.3 USCS= SM AASHTO=

#60 55.5 #70 50.8 Remarks #80 48.2 #100 46.1 #200 42.5

* (no specification provided)

Source of Sample: M-1 Depth: 2.5 Sample Number: 2 Date: 6-18-2025 HILLIS-CARNES ENGINEERING ASSOCIATES Client: HCEA-HCI Project: Sudlersville WWTP Upgrade

SALISBURY, MD

Project No: SAL250174A Figure

LIQUID AND PLASTIC LIMITS TEST REPORT

Tested By: Delany Midash

XEDNI

YTICITSALP

60 Dashed line indicates the approximate upper limit boundary for natural soils 50

CH

OH

40 30 20

CL

OL

10 CL-ML ML or OL MH or OH 47 0 0 10 20 30 40 50 60 70 80 90 100 110

LIQUID LIMIT

TNETNOC

RETAW

44.5 44 43.5 43 42.5 42 41.5 41 40.5 40 39.5 5 6 7 8 9 10 20 25 30 40 50 60 70 80 100

NUMBER OF BLOWS

MATERIAL DESCRIPTION LL PL PI %<#40 %<#200 USCS

Light brown, wet, medium stiff, lean CLAY, some sand

44.5 19.9 24.6 75.4 CL

(CL)

Project No. SAL250174A Client: HCEA-HCI Remarks:

Project: Sudlersville WWTP Upgrade Source of Sample: M-1 Depth: 5 Sample Number: 3

HILLIS-CARNES ENGINEERING ASSOCIATES

SALISBURY, MD Figure Particle Size Distribution Report Tested By: Delany Midash

RENIF

TNECREP

100 90 80 70 60 50 40 30 20 10 0 10 1 0.1 0.01 0.001 GRAIN SIZE - mm.

% Gravel % Sand % +3" % Fines Coarse Fine Coarse Medium Fine 0.0 0.0 4.5 3.3 20.4 34.7 37.1 .ni 2 .ni ½1 .ni 1 .ni ¾ .ni ½ .ni 8/3 4# 01# 02# 03# 04# 06# 001# 041# 002# SIEVE SIZE PERCENT SPEC.* PASS? Soil Description OR DIAMETER FINER PERCENT (X=NO) Dark brown, moist, loose, silty fine SAND (SM) 2 100.0 1.5 100.0 1 100.0 0.75 100.0 Atterberg Limits 0.5 100.0

PL= LL= PI=

0.375 98.4 #4 95.6 Coefficients #8 92.6

#10 92.2 D90= 1.1811 D85= 0.7354 D60= 0.3116

#16 90.0 D50= 0.2276 D30= D15=

#20 87.1 D10= Cu= Cc= #30 80.7 #40 71.4 Classification

#50 58.3 USCS= SM AASHTO=

#60 52.8 #70 47.8 Remarks #80 44.3 #100 41.6 #200 37.0

* (no specification provided)

Source of Sample: Par-1 Depth: 2.5 Sample Number: 2 Date: 6-20-2025 HILLIS-CARNES ENGINEERING ASSOCIATES Client: HCEA-HCI Project: Sudlersville WWTP Upgrade

SALISBURY, MD

Project No: SAL250174A Figure

HILLIS-CARNES

ENGINEERING ASSOCIATES

RECORD OF SUBSURFACE EXPLORATION

Project Name Sudlersville WWTP Upgrade Boring No. PAR-1 Location Sudlersville, Maryland Job # SAL250174A

SAMPLER

Datum USGS84 Hammer Wt. 140 lbs. Hole Diameter 8 Foreman Justin B.

Surf. Elev. 62.51 Ft. Hammer Drop 30 in. Rock Core Diameter NA Classified By Delany Midash Date Started 6-13-2025 Pipe Size 2 in. Boring Method HSA Date Completed 6-13-2025 Elevation/ SOIL SPT Blows/Foot C u r v e

SYMBOLS/ NM

Description Rec. SPT Blows SAMPLE % N Boring & Sampling Notes Depth CONDITIONS 10 30 50 0 Brown, moist, loose, fine to 9 5-5-4 9 Approximately 6"

I

medium SAND, trace silt (SP-SM) Gravel 60 Dark brown, moist, loose, silty fine 12 12.3 3-3-7 10

I

SAND (SM)

5 Light brown, wet, stiff, lean CLAY 14 20.2 3-6-6 12

D

(CL) Groundwater Brown, saturated, medium dense, encountered: 6' 55 fine to medium SAND, trace silt

(SP-SM)

10 2-2-1 3 D Light gray, saturated, very loose, fine to coarse SAND, trace silt, 10 trace gravel (SP- SM) 50 18 1-1-1 2 Began Mud Rotary

D

15 45 Light gray, saturated, loose, fine 18 1-3-4 7

D

to coarse SAND, trace silt, trace 20 gravel (SP-SM) 40 Brown, saturated, medium dense, 18 2-5-7 12

D

fine to coarse SAND, trace silt 25

(SP-SM)

35 Orange, saturated, medium 18 6-7-11 18

D

dense, fine to coarse SAND, trace 30 silt (SP-SM)

GROUND CAVE IN

SAMPLER TYPE SAMPLE CONDITIONS WATER DEPTH BORING METHOD

DRIVEN SPLIT SPOON UNLESS OTHERWISE D - DISINTEGRATED AT COMPLETION 6.2 ft. 8.3 ft. HSA - HOLLOW STEM AUGERS PT - PRESSED SHELBY TUBE I - INTACT AFTER 24 HRS. ft. ft. CFA - CONTINUOUS FLIGHT AUGERS CA - CONTINUOUS FLIGHT AUGER U - UNDISTURBED AFTER HRS. ft. ft. DC - DRIVING CASING

RC - ROCK CORE L - LOST MD - MUD DRILLING

STANDARD PENETRATION TEST-DRIVING 2" O.D. SAMPLER 1' WITH 140# HAMMER FALLING 30": COUNT MADE AT 6" INTERVALS.

HILLIS-CARNES

ENGINEERING ASSOCIATES

RECORD OF SUBSURFACE EXPLORATION

Project Name Sudlersville WWTP Upgrade Boring No. PAR-1 Location Sudlersville, Maryland Job # SAL250174A

SAMPLER

Datum USGS84 Hammer Wt. 140 lbs. Hole Diameter 8 Foreman Justin B.

SYMBOLS/ NM

Description Rec. SPT Blows SAMPLE % N Boring & Sampling Notes Depth CONDITIONS 10 30 50 30 Orange and brown, saturated, 18 14.1 9-18-21 39

D

dense, fine to coarse SAND, 35 some silt, trace gravel (SM) 25 Brown, saturated, dense, fine to 18 5-22-25 47

D

medium SAND, some silt (SM) 40 Boring terminated at 40.0' 20 45 15 50 10 55 5 60 0

GROUND CAVE IN

SAMPLER TYPE SAMPLE CONDITIONS WATER DEPTH BORING METHOD

RC - ROCK CORE L - LOST MD - MUD DRILLING

STANDARD PENETRATION TEST-DRIVING 2" O.D. SAMPLER 1' WITH 140# HAMMER FALLING 30": COUNT MADE AT 6" INTERVALS.

HILLIS-CARNES

ENGINEERING ASSOCIATES

RECORD OF SUBSURFACE EXPLORATION

Project Name Sudlersville WWTP Upgrade Boring No. M-1 Location Sudlersville, Maryland Job # SAL250174A

SAMPLER

Datum USGS84 Hammer Wt. 140 lbs. Hole Diameter 8 Foreman Justin B.

Surf. Elev. 63.04 Ft. Hammer Drop 30 in. Rock Core Diameter NA Classified By Delany Midash Date Started 6-13-2025 Pipe Size 2 in. Boring Method HSA Date Completed 6-13-2025 Elevation/ SOIL SPT Blows/Foot C u r v e

SYMBOLS/ NM

Description Rec. SPT Blows SAMPLE % N Boring & Sampling Notes Depth CONDITIONS 10 30 50 0 Light brown, moist, medium stiff, 14 14.9 1-3-4 7 Approximately 21"

I

lean CLAY, some sand (CL) Topsoil 60 I Brown, moist, very loose, fine to 15 14.3 2-2-2 4 medium silty SAND (SM) 5 Light brown, wet, medium stiff, 14 10.9 2-2-5 7

I

lean CLAY, some sand (CL) Groundwater encountered: 6' 55 Light brown, saturated, very 18 18.8 2-2-2 4

D

loose, fine to medium SAND, 10 trace silt (SP-SM) 50 Light gray, saturated, very loose, 18 1-2-2 4

D

fine to coarse SAND, trace silt, 15 trace gravel (SP- SM) 45 Light gray, saturated, loose, fine 18 1-2-2 4

D

to coarse SAND, trace silt, trace 20 gravel (SP-SM) 40 Light orange, saturated, medium 18 2-6-9 15

D

dense, fine to coarse SAND, 25 some silt (SM) 35 18 3-7-6 13

D

30 Boring terminated at 30.0'

GROUND CAVE IN

SAMPLER TYPE SAMPLE CONDITIONS WATER DEPTH BORING METHOD

DRIVEN SPLIT SPOON UNLESS OTHERWISE D - DISINTEGRATED AT COMPLETION 6.0 ft. 5.2 ft. HSA - HOLLOW STEM AUGERS PT - PRESSED SHELBY TUBE I - INTACT AFTER 24 HRS. ft. ft. CFA - CONTINUOUS FLIGHT AUGERS CA - CONTINUOUS FLIGHT AUGER U - UNDISTURBED AFTER HRS. ft. ft. DC - DRIVING CASING

RC - ROCK CORE L - LOST MD - MUD DRILLING

STANDARD PENETRATION TEST-DRIVING 2" O.D. SAMPLER 1' WITH 140# HAMMER FALLING 30": COUNT MADE AT 6" INTERVALS.

SOIL DESCRIPTION

SHEET

SOIL DESCRIPTION SHEET

DESCRIPTION OF SOILS - PER ASTM D2487

MAJOR COMPONENT TYPE COMPONENT SYMBOL GROUP NAME

COMPONENT DESCRIPTION

Coarse-Grained Soils, Gravels – More than 50% of the coarse Clean Gravels <5% Passing GW Well Graded Gravel More than 50% is fraction is retained on the No. 4 sieve. No. 200 sieve GP Poorly Graded Gravel retained on the No. 200 Coarse = 1” to 3” sieve Medium = ½” to 1” Gravels with fines, >12% GM Silty Gravel Fine = ¼” to ½” Passing the No. 200 sieve GC Clayey Gravel Sands – More than 50% of the coarse Clean Sands <5% Passing SW Well Graded Sand

fraction passes the No. 4 sieve. Coarse = No. 200 sieve SP Poorly Graded Sand No.10 to No.4 Medium = No. 10 to No. 40 Sands with fines, >12% SM Silty Sand Fine = No. 40 to No. 200 Passing the No. 200 sieve SC Clayey Sand Fine Grained Soils, Silts and Clays Inorganic ML Silt More than 50% passes Liquid Limit is less than 50 Low to medi- CL Lean Clay the No. 200 sieve um plasticity Organic Organic Silt

OL

Organic Clay Silts and Clays Inorganic MH Elastic Silt Liquid Limit of 50 or greater Medium to CH Fat Clay high plasticity Organic Organic Silt

OH

Organic Clay Highly Organic Soils Primarily Organic matter, dark color, organic odor PT Peat

PROPORTIONS OF SOIL COMPONENTS PARTICLE SIZE IDENTIFICATION

COMPONENT DESCRIPTION APPROXIMATE PARTICLE PARTICLE DIMENSION

FORM PERCENT BY WEIGHT SIZE

Noun Sand, Gravel, Silt, Clay, etc. 50% or more Boulder 12” diameter or more Adjective Sandy, silty, clayey, etc. 35% to 49% Cobble 3” to 12” diameter Some Some sand, some silt, etc. 12% to 34% Gravel ¼” to 3” diameter Trace Trace sand, trace mica, etc. 1% to 11% Sand 0.005” to ¼” diameter Silt/Clay (fines) Cannot see particle With With sand, with mica, etc. Presence only

COHESIVE SOILS GRANULAR SOILS

FIELD DESCRIPTION NO. OF SPT CONSISTENCY NO. OF SPT RELATIVE DENSITY

BLOWS/FT BLOWS/FT.

Easily Molded in Hands Less than 2 Very Soft Less than 5 Very Loose Easily Penetrated several inches by thumb 2 - 4 Soft 5 - 10 Loose Penetrated by thumb with moderate effort 5 - 8 Medium Stiff 11 - 30 Medium Dense Penetrated by thumb with great effort 9 - 15 Stiff 31 - 50 Dense Indented by thumb only with moderate effort 16 - 30 Very Stiff Greater than 50 Very Dense Indented by thumb only with great effort Greater than 30 Hard

OTHER DEFINITIONS:

• Fill: Encountered soils that were placed by man. Fill soils may be controlled (engineered structural fill) or uncontrolled fills that may contain rubble and/

or debris.

• Disintegrated Rock: Residual soil material with rock-like properties, very dense, N > 60 blows/ft.

• Karst: Descriptive term which denotes the potential for solutioning of the limestone rock and the development of sinkholes.

• Alluvium: Recently deposited soils placed by water action, typically stream or river floodplain soils.

• Groundwater Level: Depth within borehole where water is encountered either during drilling, or after a set period of time to allow groundwater

conditions to reach equilibrium.

• Caved Depth: Depth at which borehole collapsed after removal of augers/casing. Indicative of loose soils and/or groundwater conditions.