Sudlersville Wastewater Treatment Plant ENR Improvement Project — Bid BPM058134

Exactly as extracted, unformatted — for checking against the original. The readable version is easier to read.

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
TABLE OF CONTENTS
* 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
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.
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
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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 pre-
bid, 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
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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
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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
(c) BIDDER hereby states that he has available adequate equipment and
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.
(c) Other documents as required by the Instructions to Bidders or Contract
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
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

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 non-
discrimination 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 in-
stream 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 near-
stream 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.
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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 good-
faith 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 sub-
contracting 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 sub-
contract 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)
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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.
(c) Dividing total requirements, when economically feasible, into small tasks or quantities, to
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 tion-
district and regional offices to assist small structure/contracting/working-
businesses 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-codes-
and-small-business-size-
standards
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.
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 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:
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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.
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QUEEN ANNE'S COUNTY, MD
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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.
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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.
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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
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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
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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:
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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.
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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
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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.
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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.
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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.
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QUEEN ANNE'S COUNTY, MD
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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
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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.
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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.
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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.
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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.
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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.
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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
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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.
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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.
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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
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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.
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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.
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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
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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:
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QUEEN ANNE'S COUNTY, MD
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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
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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
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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
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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:
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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
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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
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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.
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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
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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
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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
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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 sub-
surface 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
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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
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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.
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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-in-
place 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)
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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
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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
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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.
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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
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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
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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.
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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.
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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
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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
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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
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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.
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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
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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 case-
by-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 above-
mentioned 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.
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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
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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
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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
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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.
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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.
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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
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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
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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 re-
assembling 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
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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 three-
hole 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
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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.
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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
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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
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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
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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
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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
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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
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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
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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.
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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
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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.
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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
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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
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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:
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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
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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
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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
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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)
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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
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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
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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
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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.
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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.
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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
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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.
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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.
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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,
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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 re-
excavation 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.
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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
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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
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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.
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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.
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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
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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.
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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
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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
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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.
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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
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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.
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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.”
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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
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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.
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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.
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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.
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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.
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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.
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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.
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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
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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 pre-
coat 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.
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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
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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
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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:
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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.
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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.
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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).
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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
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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 non-
staining 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.
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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 face-
to-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
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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.
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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
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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.
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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
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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
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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.
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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
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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 motor-
driven 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 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 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.
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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
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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
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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 two-
thirds 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
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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.
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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
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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
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Sudlersville Wastewater Treatment Plant
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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
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Sudlersville Wastewater Treatment Plant
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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.
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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.
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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.
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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.
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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.
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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
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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.
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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).
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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
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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 factory-
finished 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
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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
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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.
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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.
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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
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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.
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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
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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.
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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 uni-
bond 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:
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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
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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.
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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.
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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.
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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.
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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.
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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
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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
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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
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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
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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, non-
clogging 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
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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.
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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.
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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
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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 spring-
loaded 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.
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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
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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.
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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
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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 ex-
proof 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.
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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.
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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.
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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
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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
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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.
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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
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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.
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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”.
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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
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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
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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
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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.
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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.
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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.
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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.
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b The Contractor will be responsible for performing pre-
mapping 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
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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 remote-
operated/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.
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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
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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.
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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.
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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.
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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
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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.)
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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.
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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
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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
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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
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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
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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
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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
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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.
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.
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
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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
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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.
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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
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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 full-
scale testing:
1.4.2.1 FRP Deck Panels: Large-Scale Uniform Load and Deflection
Test
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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.
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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 build-
up.
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
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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
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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.
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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.
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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-
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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
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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
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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
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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
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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.
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QUEEN ANNE’S COUNTY, MD
Sudlersville Wastewater Treatment Plant
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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 start-
up 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
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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 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 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.
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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.
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.
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.
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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.
2.5.2 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 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.
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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
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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.
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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
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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.
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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.
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QUEEN ANNE’S COUNTY, MD
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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
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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.
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QUEEN ANNE’S COUNTY, MD
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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.
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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
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QUEEN ANNE’S COUNTY, MD
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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
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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.
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
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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.
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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
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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
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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
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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
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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
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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.
1.4.2 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 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
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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
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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 full-
size 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, pick-
up, 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
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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
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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.
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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
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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
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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.
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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.
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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 flush-
mounted 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 surface-
mounted 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.
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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 non-
skid 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 stub-
ups).
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.
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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.
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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
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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 stainless-
steel 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.
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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.
1.4.2 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 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.
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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 tinned-
copper 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 flame-
retardant 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.
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QUEEN ANNE’S COUNTY, MD
Sudlersville Wastewater Treatment Plant
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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.
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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
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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
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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.
1.4.2 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
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
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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.
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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 short-
circuit 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.
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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 current-
limiting 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.
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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.
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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-to-
neutral, 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
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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
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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.
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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
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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
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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%.
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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
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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
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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.
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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
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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 man-
days, 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:
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3.6.1 Operation and maintenance of the drive and its accessories.
3.6.2 Configuration and troubleshooting.
END OF SECTION
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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
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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, 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 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
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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
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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.
1.4.2 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
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.
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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
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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.
1.4.2 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. 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)
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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.
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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.
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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.
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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 bi-
directionally.
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.
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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
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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).
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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
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Sudlersville Wastewater Treatment Plant
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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.
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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.
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Sudlersville Wastewater Treatment Plant
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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
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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
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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.
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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 pre-
submittal 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
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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
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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
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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
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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
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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
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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
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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
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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.
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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
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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.
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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.
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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
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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
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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
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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
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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
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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.
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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
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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 opto-
electrical 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
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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.
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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.
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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.
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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.
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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
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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
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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.
1.4.2 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 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 rust-
inhibiting primer and two coats of epoxy gray paint.
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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 floor-
mounted 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
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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.
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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, single-
phase, 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.
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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
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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.
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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
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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
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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.
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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.
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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
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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
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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)
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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
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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.
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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
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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
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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.
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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
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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
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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
a
• Passive Earth Pressure Coefficient (K ): 3.00
p
• 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
or
OH
40
30
20
CL
or
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
or
OH
40
30
20
CL
or
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.
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
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
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. 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.