REQUEST FOR PROPOSAL NO. 26-180-P

Wylie WTP Water Line Cleaning

PRE-PROPOSAL MEETING/SITE VISIT:

Friday, August 14, 2026, at 10:00 AM CST

SUBMITTALS ARE DUE PRIOR TO:

Thursday, August 27, 2026, at 2:00 PM CST

RFP MAY BE SUBMITTED ELECTRONICALLY TO (Registration is free):

ntmwd.bonfirehub.com

DOCUMENTS MAY BE DELIVERED TO:

NORTH TEXAS MUNICIPAL WATER DISTRICT

PROCUREMENT DEPARTMENT

501 E. BROWN STREET

WYLIE, TX 75098

DOCUMENTS MAY BE MAILED TO:

NORTH TEXAS MUNICIPAL WATER DISTRICT

PROCUREMENT DEPARTMENT

PO BOX 2408

WYLIE, TX 75098

NORTH TEXAS MUNICIPAL WATER DISTRICT CONTACT:

Tonya Hall thall@ntmwd.com

SOLICITATION SUMMARY FOR

REQUEST FOR PROPOSAL 26-180-P (RFP)

1. GENERAL DESCRIPTION

The North Texas Municipal Water District (NTMWD) is seeking proposals from qualified contractors to provide water line cleaning services for NTMWD’s Wylie WTP.

2. SCHEDULE OF EVENTS

Please find below a tentative schedule of events for this RFP. NTMWD reserves the right, in its sole discretion, to revise the tentative schedule of events if the said revision is in its best interest.

▪ RFP Release Date: August 6, 2026

▪ Pre-Proposal Meeting/Site Visit: August 14, 2026, at 10:00 AM CST

▪ Deadline for Questions: August 18, 2026, at 10:00 AM CST

▪ Proposal Due Date and Time: August 27, 2026, at 2:00 PM CST

▪ Contract Execution: Anticipated in mid-to-late September 2026

PRE-BID MEETING / SITE VISIT

A pre-proposal meeting will be held on Friday, August 14, 2026, at 10:00 AM CST in NTMWD Water Operations Center Large Conference Room at 851 Forrest Ross Road, Wylie, Texas 75098. A site visit will be held immediately following the pre-proposal meeting at Wylie WTP, 851 Forrest Ross Road Wylie, TX

75098. IT IS HIGHLY RECOMMENDED THAT ALL PROPOSERS ATTEND THE PRE-PROPOSAL

MEETING AND SITE VISIT. Proposers may ask questions about the specification and proposal process during the meeting. Questions and answers will be made in the presence of all attendees. If a question cannot be answered during the meeting, answers will be provided via a written addendum and distributed through ntmwd.bonfirehub.com.

Please RSVP for the pre-proposal meeting & site visit by completing the form at the following link:

https://forms.cloud.microsoft/Pages/ResponsePage.aspx?id=kOJhZwyWlUy4sKrPpDr2c0458H3xmfZOkXuU x2WsK5NUOUxJOEc5NEc4S1BZQzU3MlBPNlhQQ1U0Sy4u

Attendees must provide and wear personal protective equipment (PPE) while on site at all NTMWD locations. PPE must include, at a minimum:

• Steel-toe boots

• Hard hat

• High-visibility shirt or vest

The proposal opening will be held via Webex immediately following the Proposal Due Date and Time. To participate in the opening, please utilize the following information:

URL: https://ntmwd.webex.com/ntmwd/j.php?MTID=mf342f371a2ef16b2d20b7beed6cd8464

OR

TEL: 1-415-655-0001 or 844-621-3956

Access Code: 2661 783 9890

Only the names of companies who submitted proposals will be read.

https://forms.cloud.microsoft/Pages/ResponsePage.aspx?id=kOJhZwyWlUy4sKrPpDr2c0458H3xmfZOkXuUx2WsK5NUOUxJOEc5NEc4S1BZQzU3MlBPNlhQQ1U0Sy4u https://forms.cloud.microsoft/Pages/ResponsePage.aspx?id=kOJhZwyWlUy4sKrPpDr2c0458H3xmfZOkXuUx2WsK5NUOUxJOEc5NEc4S1BZQzU3MlBPNlhQQ1U0Sy4u https://ntmwd.webex.com/ntmwd/j.php?MTID=mf342f371a2ef16b2d20b7beed6cd8464

3. TERM

The agreement shall commence on the date of the last signatory and shall be for a period of seventy-five (75) calendar days from issuance of the notice to proceed. NTMWD reserves the option to extend this agreement for an additional one (1) year from its expiration date for any reason. Prices shall remain firm for the duration of the agreement.

4. INSURANCE REQUIREMENTS

Before a contract can be executed, the successful proposer shall provide evidence of insurance coverage in accordance with the “Insurance Provisions” in SPECIAL PROVISIONS contained within this solicitation document. Bidders and their insurance agent, broker or representative must review the insurance provisions to understand its requirements and cost to contract with NTMWD. An insurance affidavit is included in this solicitation to verify the proposer will comply with the insurance provisions if a contract is awarded.

TABLE OF CONTENTS

PROPOSAL INSTRUCTION AND REQUIREMENTS

1 Contact Information 2 Addenda and Clarifications 3 Proposal Preparation 4 Proposal Format Requirements 5 Submittal of Proposals 6 Proposal Receipt / Evaluation of Proposals 7 Proposal Award 8 Determination of Non-Responsible Proposer 9 Determination of Non-Responsive Proposal 10 Rejection of Proposals

11 Withdrawing Proposals 12 Proposal Preparation Forms

EVALUATION CRITERIA

SCOPE OF WORK

SPECIAL PROVISIONS

1 NTMWD’s Right to Inspect and Audit 2 Term 3 Insurance Provisions

GENERAL TERMS AND CONDITIONS

1 Assignment 2 Changes In Contract 3 Compliance With Laws 4 Confidential or Proprietary Information 5 Federal Fair Labor Standards Act (Federal Minimum Wage) 6 Fiscal Year Funding 7 Force Majeure

8 Indemnification and Hold Harmless 9 Independent Contractor 10 Jurisdiction 11 Non-Compete Agreement or Clauses 12 Notice of Delays 13 Occupational Safety and Health Act of 1970 14 Personal Liability of Public Officials 15 Severability 16 Subletting of Contract

17 Tax Exemption Status 18 Termination of Contract: Default And Remedies 19 Termination of Contract For NTMWD Convenience 20 Terms of Payments 21 Third-Party Beneficiary Clause

PROPOSAL RESPONSE FORMS

1 Proposal Pricing Format 2 Cooperative Purchasing Provisions 3 Insurance Review Verification 4 Subcontractor Agreement Verification 5 Organizational Summary Information 6 Insurance Affidavit 7 Vendor Supplemental Information 8 Proposal Endorsement Form 9 Prohibition on Contracts with Companies Boycotting Energy Companies 10 Prohibition on Contracts with Companies that Discriminate Against Firearm & Ammunition Industries

PROPOSAL INSTRUCTIONS & REQUIREMENTS

A Proposal is requested by NTMWD. NTMWD will receive separate sealed Proposals until the Proposal Due Date and Time. This Section provides information on how and where to submit a Proposal and other pertinent information regarding this RFP. Those who submit proposals are required to read and comply with these instructions.

1. CONTACT INFORMATION

It is the Proposer’s responsibility to ask questions and obtain clarification of any information contained herein. Proposers must submit all questions or requests for clarification ONLY in writing and ONLY to the contact person identified on the Cover of this RFP (the “NTMWD Contact”). The Solicitation Number must be referenced in all correspondence pertaining to this RFP. Proposer contact with NTMWD personnel, other than the NTMWD Contact, may be cause for Proposal rejection.

2. ADDENDA AND CLARIFICATIONS

NTMWD may, in its sole discretion, elect to issue changes or clarifications to the RFP. NTMWD will issue changes or clarifications in the form of a written addendum. Written addenda shall be the ONLY FORM of amendment to the RFP. Other written information or verbal communications shall not constitute a change to the requirements of the RFP. Addenda, if issued, will be mailed, faxed, and/or emailed to all known prospective Proposers prior to the date and time of the Proposal Due Date and Time.

It is the Proposer’s responsibility to ensure receipt of any addenda issued by NTMWD. Failure of any Proposer to receive any such addendum or interpretation shall not relieve the Proposer from any obligations under its Proposal as submitted. The Proposer must sign all addenda and return them with their Proposal. All addenda shall become part of the contract documents.

3. PROPOSAL PREPARATION

A. Submittals: Proposer must submit all Proposal Response Forms, plus all addenda, completed forms, and any requested information and documentation as part of its Proposal. Proposer’s failure to include all submittals may be cause to consider a Proposal non-responsive.

B. Endorsing the Proposal: An authorized officer of the Proposing Firm must sign the Proposal. Signature of the Proposal will signify agreement and compliance with all requirements set forth in this RFP except where properly noted in the Proposal Response Forms. Proposers that take exception to NTMWD’s General Terms and Conditions, Special Provisions, and/or Scope of Work shall do so at the risk of Proposal rejection.

C. Tax Exempt Status: Purchases by NTMWD are exempt from sales and use tax under Section 151.309 of the Texas Tax Code (the “Code”). In addition, purchases of tangible personal property and taxable services for the purpose of reselling them to NTMWD may also be exempt from sales and use tax under Code Section 151.302. Where legally permitted, a Consultant shall provide the vendor or supplier with a properly executed resale certificate at the time of purchasing tangible personal property and/or taxable services that are to be resold to NTMWD pursuant to a contract.

D. Acceptance of Specification Requirements: NTMWD will presume that the service offered complies with each requirement of the scope of work unless indicated otherwise. If the service offered is different than specified, Proposer must note the difference on an attached document that details the exception(s) to scope of work. Failure of the Proposer to make the required acknowledgements may cause the Proposal to be considered non- responsive, in the sole determination of NTMWD. Should any product be delivered or service performed which is not as the Successful Proposer has purported it to be in its Proposal, said Successful Proposer will be required to correct any deficiencies without additional cost to NTMWD.

E. Proposer Requirements: The Proposer must have demonstrated experience of a similar nature and scope in the successful completion of the services to be performed pursuant to the Scope of Work. The Successful Proposer must take prime Consultant responsibility, including the management and performance of all subcontractors and products (goods) provided.

F. Proposer Costs: Any costs that may be incurred to prepare responses, attend meetings, attend site inspections, provide requested follow-up information, make formal and informal presentations, and / or contract negotiations, if applicable, shall be the sole responsibility of the Proposer.

G. Confidential or Proprietary Markings: Any portion of the Proposal that Proposer considers confidential or proprietary information, or to contain trade secrets of Proposing Firm, must be marked accordingly. This marking must be explicit as to the designated information. This designation may not necessarily guarantee the non-release of the information under the Public Information Act or as otherwise required by law but does provide NTMWD with a means to review the issues thoroughly and, if justified, request an opinion by the Attorney General's office prior to releasing any information requested under the Public Information Act.

4. PROPOSAL FORMAT REQUIREMENTS

Overview

To facilitate and expedite the evaluation process, all information in the Proposal should be organized and presented as directed below. A Proposal may be deemed to be non-responsive and may be disqualified, at NTMWD’s discretion, if the Proposal fails to comply with the following instructions.

Proposal Organization

The original hard copy Proposal shall be submitted in a 3-ring binder or electronically via Bonfire.

Proposals that are uploaded to ntmwd.bonfirehub.com by the specified due date and time will satisfy the bidding requirements.

Proposal text shall be typed in font no smaller than 10 point, on 8.5-inch by 11-inch paper, with one-inch margins.

Proposals may be either single-sided or double-sided pages and single-spaced the entire document.

All Proposal sections shall be divided by the use of numeric index tabs. All pages within these sections shall be uniquely numbered for purposes of easy reference.

Proposals shall be assembled in accordance with the following format.

Cover Letter (1 Page Limit)

• Include an explicit statement indicating that the Proposer, if successful, will be the Prime Consultant for the Work.

Table of Contents

• Include references to sections and page numbers.

Disclosure Statements

• Proposer’s disclosure and description of any outstanding legal issues and claims against it in connection with current Scope of Work or other Scope of Work undertaken in the last five (5) years.

• Proposer shall include in its response a statement affirming that no member of NTMWD, no officer, director, agent, or employee of NTMWD, and no member of any commission, committee, NTMWD or corporation controlled or appointed by NTMWD has already received, in connection with or related in any way to this contract, or has been promised, in the event this contract is awarded to the firm, any commission, finder's fee or other thing of value. In addition, the firm shall furnish a statement that identifies any member of NTMWD and any official or employee of NTMWD who, the firm has reason to believe, would or may be financially affected, whether affirmatively or negatively, and whether personally or through a spouse or other family member, if this contract were awarded to the Proposer. Upon request by NTMWD’s Executive Director, or an authorized agent thereof, the Proposer shall respond to any questions relating to the subject of this section.

Addenda

• The acknowledgement page(s) of all addenda issued by NTMWD shall be signed by the Proposer’s authorized representative and submitted in this section.

Section 1 – Company Overview

• Provide the name of the person who is authorized to answer questions regarding the firm’s proposal.

Please include a phone number and e-mail address.

• Provide a brief overview of your firm including history, mission and/or philosophy, services offered, areas of expertise and organizational structure. Include the number of years in business and the size of company.

• Describe what types of pipe cleaning services your company provides.

• Provide a list of staff proposed for this project. Include their qualifications, experience, and credentials/designations.

Section 2 – Methodology and Approach

• Detail your firm’s approach to remove mineral build-up from the interior walls of the 84-inch and 108-inch pipes described in the bid documents. Include types of major equipment to be used.

• Describe your firm’s approach to removing material from the pipe while maintaining the 1-inch sacrificial layer and protecting the concrete core of the pipe.

• Describe your firm’s approach to move the mineral build-up from inside the pipe to the surface.

• Describe your proposed waste management and disposal method, including proposed landfill, steps taken to meet all applicable local, state, and federal regulations, and any required intermediate processing steps to meet those regulations. Specifically address how material will be dewatered to pass paint filter test requirements (if applicable) and how material will be stored on site prior to disposal.

• Provide a project schedule for the work, including proposed number of crews, anticipated working hours, and how the schedule will meet the contract completion deadline.

• Describe what assistance will be required from NTMWD’s staff during the project.

• Identify inherent Scope of Work challenges and the overall plan for meeting the requirements.

• Provide any additional information which will be useful in evaluating your proposal.

• Provide a list of the major equipment proposed for this project. Indicate whether each item is currently owned or otherwise available to your firm, or whether it will need to be acquired or rented.

• Describe your contingency plan for equipment failures or other major equipment downtime during the project.

Section 3 – Past Experience

• Describe your firm’s experience in providing the services described in the scope of work.

• Provide the following:

o Certifications, licenses or industry-specific credentials relevant to the scope of work.

o Awards or recognitions relevant to the scope of work.

• List 3 – 5 projects that are most similar in scope, size, complexity and deliverables to the requirements specified in this request for proposal. For each project, provide the following information:

o Project name o Project description o Client name o Contract value o Duration (planned versus actual) o Key deliverables and scope elements that match NTMWD requirements

• Provide a minimum of three (3) references, for which work has been completed in the past thirty-six (36) months. References should include public entities, if available, and shall be from clients for whom your firm has provided services of similar size and scope to the requirements specified in this request for proposal. Please include a narrative description of the scope of the project. For each, provide the following information:

o Client name o Location (city and state) o Contact name(s) o Phone number o Email address(s) o Brief description of work performed, and how it is relevant to the Scope of Work in this RFP.

o List any team members who worked on the referenced project that are also proposed for this RFP’s

Scope of Work.

• List all clients that have, in the past two (2) years, terminated their contract prior to the contract’s original completion date, including decisions by the client not to exercise remaining contract option years.

For any contracts listed, give the reason for termination (if known) and the names and telephone numbers of the client’s agent or employee responsible for administering the contract.

Pricing (Do not include this information in the binder)

Provide one (1) copy of the proposed pricing in a sealed envelope entitled “Pricing”. Proposal pricing shall be assembled and presented in accordance with the format and instructions of this RFP.

SUBMITTAL OF PROPOSALS

• NTMWD will accept Proposals no later than the Deadline for Proposal Due Date and Time. NTMWD will not consider late proposals. All Proposals submitted in response to this RFP shall become the property of NTMWD and will not be returned to the Proposer.

• Hard Copy Proposals must be signed, sealed in an envelope or container, and delivered to NTMWD’s Procurement Department. Unsigned, unsealed or late Proposals will not be considered. The Proposer must submit one (1) original. The Proposal submittal must be clearly marked with the RFP Number, Proposal Due Date and Time and addressed to the attention of the Procurement Department.

• Proposals that are uploaded to ntmwd.bonfirehub.com by the specified due date and time will satisfy the bidding requirements. Technical questions regarding how to upload your submission should be directed to Bonfire support. All other questions regarding this solicitation should be submitted on Bonfire by the question due date and time. If Bonfire is unavailable, questions can be directed to thall@ntmwd.com.

• Proposer must provide all information requested in this RFP for a Proposal to be considered responsive.

• Non-Compete Agreements or Clauses: By submission of a bid or proposal or the execution of a contract, Bidder/Consultant agrees that NTMWD will not be bound by any non-compete agreements or similar agreements that inhibit NTMWD’s right to award and execute a contract to any company that submits a bid or proposal to NTMWD.

PROPOSAL RECEIPT / EVALUATION OF PROPOSALS

mailto:thall@ntmwd.com

Responses to this RFP (Proposals) become the exclusive property of NTMWD. Proposals will be opened by NTMWD so as to avoid disclosure of contents to competing Proposers and kept secret during the process of negotiation.

After Proposals are opened, they will be evaluated on the basis given in the Scope of Work and as described in the “Evaluation Criteria” Section of this RFP. Until final award of a Contract, NTMWD reserves the right to reject any or all Proposals, to waive technicalities, or to proceed with an award for the services otherwise as deemed in NTMWD’s best interest.

• NTMWD reserves the right to require additional information from any or all Proposers and to conduct necessary investigations to determine (a) if the product and/or service offered meets NTMWD’s requirements, (b) the quality and reliability of the Proposer’s performance, and/or (c) to determine the accuracy of the Proposal information. As part of said investigations, NTMWD may interview and/or visit companies or public entities listed as references.

• NTMWD reserves the right to select any/all options that is/are determined to be in its best interests and at the sole discretion of NTMWD.

PROPOSAL AWARD

• If a Purchase Order or Contract is awarded as a result of this RFP, it will be made by NTMWD to the Proposer whose Proposal is determined to be the most advantageous to NTMWD, taking into consideration the relative importance of price and other evaluation factors, as identified in the Evaluation Criteria Section of this RFP.

• Proposals shall remain valid during the evaluation process time period including award of the Purchase Order or Contract. This time period is a minimum of 120 days.

• NTMWD reserves the right to make multiple awards if NTMWD believes it is in its best interest to do so.

• NTMWD and the Consultant agree to perform this Contract in strict accordance with the documents listed below, all of which are made a part of this award, in the order of precedence listed:

• Negotiated Modifications, if applicable

• Addenda, if applicable

• RFP Scope of Work

• Special Provisions

• General Terms and Conditions

• Consultant’s Proposal

• Proposer is required to review all the terms, conditions and contract provisions contained in this RFP to ensure it can comply with and concurs with all requirements.

• Proposer is required to review the payment terms and is advised that, unless other terms are requested and accepted, payment shall be made within 30 days after receipt of a valid invoice or receipt of products / services in accordance with the scope of work, whichever is later.

DETERMINATION OF NON-RESPONSIBLE PROPOSER

• NTMWD may disqualify a Proposer as non-responsible and its Proposal shall not be considered for reasons including but not limited to the following:

• Reason for believing collusion exists among the Proposers.

• The Proposer being in arrears on any existing contract or having defaulted on a previous contract.

• Where the Proposer, in the judgment of NTMWD, has failed to perform in a satisfactory manner on a previous contract.

DETERMINATION OF NON-RESPONSIVE PROPOSAL

• NTMWD may disqualify a Proposal as non-responsive and it shall not be considered for reasons including but not limited to the following:

• Proposal received after the Proposal Due Date and Time.

• Proposal was not signed.

REJECTION OF PROPOSALS

• NTMWD will automatically reject any Proposal that is submitted after the Proposal Due Date and Time and return it unopened.

• Until a Purchase Order is issued, NTMWD reserves the right to reject any or all Proposals, to waive technicalities, to re-solicit, to decline to proceed, or to otherwise proceed with procurement of goods and services herein defined by other method(s) allowed by law and in the best interests of NTMWD.

WITHDRAWING PROPOSALS

• Proposer, by submitting a proposal, warrants and guarantees that the proposal has been carefully reviewed and checked and that it is in all things true, accurate and free of mistakes. However, Proposers have a common law right to withdraw a proposal due to material mistake in the proposal.

• Proposer must submit a request to withdraw a proposal in writing to the Procurement Manager. The written request to withdraw a proposal must state the reason for the withdrawal request and, if the request is made after the Proposal Due Date and Time, the details of the material mistake must be included in the request.

A proposal for which withdrawal is properly requested prior to the Proposal Due Date and Time will be returned to the Proposer unopened.

• If the Proposer elects to withdraw its proposal and the withdrawal is accepted by the Procurement Manager or Designee, then the proposal/bid will become null and void. The proposal/bid will not be eligible to be reinstated.

PROPOSAL CHECKLIST

RFP NO. 26-180-P PROPOSER:

A check mark in the space provided indicates these forms, documents, or actions have been completed and are included in the proposal package. All deviations from the scope of work, form submittals, or action items must be documented separately and included in the submission.

Please include a copy of a completed checklist with the proposal response.

Proposal Submittals

Signatures. All forms requiring a signature have been signed.

Proposal Forms. All forms completed, including:

Proposal Pricing Form(s) Organizational Summary Form Proposal Endorsement Form All other forms requested as part of the RFP

Addenda. When applicable, Proposer submits signed addenda issued as part of the RFP. If any addenda included amended proposal pages or attachments, those documents must be used and included with the proposal.

Vendor References. Proposer provided the requested number of references for the Proposer.

Proposer Qualifications. When applicable, Proposer to provide all certifications, licensing, or other requested qualifications verification forms or information necessary to validate qualifications to provide products or services.

Proposal Completion Actions

Read/Confirm Intent to Comply. Proposer has read the Scope of Work, Special Provisions, General Terms and Conditions and confirms that he/she will comply with all requirements as provided.

Proofreading. Proposer has proofread all documents to ensure all information provided by the Proposer is accurate and responsive to the RFP scope of work.

NTMWD is not responsible for errors made by the Proposer.

Proposer has proofread all mathematical and numerical entries to ensure accuracy and commitment to honor pricing as submitted.

Late Proposals. Please note the time, date and delivery location (or mailing address if submitted by U.S. Postal Service). Late bids or proposals will not be accepted.

END OF PROPOSAL INSTRUCTIONS AND REQUIREMENTS

This checklist is intended to be an aid to reduce the possibility of errors in proposal submission; it is not intended to relieve the Proposing Firm from its obligations to review and comply with the RFP requirements.

EVALUATION CRITERIA

1. The evaluation criteria listed below will be used to determine which proposal response is most advantageous to NTMWD. Said determination will be made by NTMWD based on NTMWD’s best interest and shall be considered final. Responses received to this RFP will be evaluated based on the criteria and corresponding weight given in each evaluation category listed herein. NTMWD’s evaluation team may consider feedback from references and/or NTMWD’s direct experience with a Proposing Firm as part of their evaluation process and consideration for scoring proposals. NTMWD’s evaluation team reserves the right to shortlist firms based upon scores/ratings received during the evaluation process.

2. Discussions may be conducted with finalist firms as determined by the evaluation team for clarifications as needed. Proposers shall be treated fairly and equally with respect to any opportunity for discussions. Inasmuch as NTMWD may not request best and final offers, Proposers are strongly urged to provide competitive pricing since revisions may not be permitted after submissions and before the award of the Contract.

3. The evaluation criteria are listed below:

Criterion Weight

Company Overview, Qualifications and Personnel Experience (Section 1) 10 Points

Methodology and Approach (Section 2) 20 Points

Prior Experience Completing Similar Projects (Section 3) 20 Points

Price 50 Points

END OF EVALUATION CRITERIA

SCOPE OF WORK

WYLIE WTP WATER LINE CLEANING

1.01 BACKGROUND

NTMWD conveys finished water inside an 84” Prestressed Concrete Cylinder Pipe (PCCP) at a rate of 135 MGD (million gallons per day). The pipe connects to a 108” diameter pipe where it combines with additional flows to carry 280 MGD. In 2024, Operations staff observed that the flow rate in the 84-inch pipe was restricted. When the plant was taken out of service, inspection revealed that the effective cross section of the pipe was reduced to 32 inches due to mineral build-up. A contractor was engaged to remove the mineral build up during the plant shutdown. Initially, the contractor used manual cleaning methods and ultimately switched to hydro blasting to remove the Calcium Carbonate buildup. Due to time constraints during the previous shutdown, the entire cross section of the pipe was not cleaned. Furthermore, an additional 2” of additional build-up (estimated) has accumulated since the previous cleaning.

NTMWD is looking for a contractor who can safely remove and dispose of the mineral build-up from the pipe with no damage to the pipeline.

2.00 GENERAL

2.01 SCOPE OF WORK

A. The work covered in this section consists of removing calcium carbonate buildup inside the 84” filter effluent line from the existing caustic injection manhole to the 84” X 84” tee, and into a 108” pipe that connects to a wye which leads to existing Clearwells. Drawings of the pipe are provided in Exhibit A.

B. The pipe system to be cleaned is approximately 650 ft long, and the calcium carbonate buildup is accumulated in an estimated 2” thick layer on the top half of the pipe, with the bottom half completely blocked except for an approximately 18-inch-wide walking path.

1. Progress photos from the previous cleaning effort are provided in Exhibit B.

2. Videos showing the final cleaned pipe after the previous cleaning effort, and a follow-up inspection in December 2025 after having the pipe in service for 184 days are provided in Exhibit C.

C. Contractor shall provide all necessary materials, equipment, tools, labor, and associated appurtenances for cleaning the pipeline as specified herein. Cleaning involves removing debris from the pipeline and offsite disposal of the debris.

D. The existing pipe is a prestressed concrete cylinder pipe (PCCP, type E-301). To avoid damaging the pipe, methods such as hydro demolition and manual mechanical cleaning methods are allowed. Contractor can propose other cleaning methods that must be approved by NTMWD. Cleaning methods involving circular cut-off saws and chemicals will not be allowed.

E. The Contractor is responsible for disposal of all material removed from the pipe, in accordance with all applicable laws and regulations.

F. After removing mineral build-up and a final inspection, the 84” filter effluent line shall be cleaned (power washed) and disinfected.

G. All operations specified herein shall commence when the Plant 3 shutdown begins. The plant is expected to shut down on November 2, 2026; however, this date is subject to change and will be coordinated with the Contractor. After the shutdown begins and NTMWD provides a notice to proceed, the Contractor shall complete the work in 75 calendar days or less.

Completion includes successful disinfection and passing bacteriological tests to return the pipe to service.

2.02 PROJECT DELIVERABLE AND REQUIREMENTS

A. The Contractor shall provide the following submittals and documentation:

1. Project Schedule

a. Submit a project schedule during the first week following the commencement of cleaning operations. The schedule shall identify the anticipated duration of the work and major project milestones.

b. Submit a revised schedule whenever the anticipated project duration or completion date changes from the previously submitted schedule.

2. Daily Progress Logs - Submit a daily progress report to NTMWD for each day work is performed. At a minimum, the report shall include:

a. The location and length of pipeline cleaned during the reporting period.

b. Disposal tonnage for removed material, when available, including supporting disposal documentation.

c. Before-and-after photographs and/or video documenting the completed cleaning work to determine whether the work performed is acceptable.

d. The effective diameter of the pipeline shall be measured at least once per joint of pipe or every 20 feet if the joint is not visible and must be noted. Document the diameter measurement using photos for NTMWD verification.

3. Final Project Deliverables – Upon completion of the cleaning, submit the following:

a. A complete end-to-end video recording of the final television inspection of the cleaned pipeline.

b. All photos in digital format.

4. Work Plan - Submit a Work Plan prior to the start of cleaning project. At a minimum, the Work Plan shall include:

a. The proposed sequence of work and planned cleaning operations.

b. Safety precautions/procedures, including traffic control measures and coordination with other Contractors that may be working in the project area.

c. Certification that personnel performing the cleaning work are properly trained and qualified for confined space entry and work in hazardous environments.

d. Confined space entry and hazardous environment forms applicable to the work.

e. A list of equipment for use on the project.

2.03 PAYMENT

A. Work to be performed under this contract shall be paid for mobilization, demobilization and water line cleaning. Water line cleaning shall include all labor, materials and equipment for buildup removal, transportation to a disposal site, and all disposal fees, including any necessary laboratory fees to classify the material. Air ventilation systems, confined space equipment and oversight, and all other incidental labor, materials, and equipment required to remove and transport the debris and clean the pipe shall be included in the water line cleaning cost.

Permit/regulatory costs shall be included in the payment item and listed separately.

2.04 QUALITY ASSURANCE

A. Contractor shall provide an on-site field supervisor who will be the project's primary point of contact during the cleaning operations for on-site coordination. The on-site field supervisor shall be present on site at all times during active operation. The Contractor shall also provide the names, titles, and phone numbers of all the personnel involved in the cleaning operation.

B. Contractor shall provide air ventilation blower/hose, lights, and oxygen monitors as needed and demonstrate that all the equipment is in good working order before entering the pipe.

C. Contractor shall coordinate all activities through NTMWD.

3.00 PRODUCTS

3.01 CLEANING EQUIPMENT

A. Removing calcium carbonate build-up shall be done using a method that will not damage or degrade the pipe. The Contractor must avoid striking the face of the pipe directly. A one-inch (1”) sacrificial layer of build-up should be left on the surface of the pipe to prevent damage to the pipe face.

B. The Contractor must demonstrate that their equipment, selected pressure, and procedures are capable of removing the scaled material build-up without damaging the concrete pipe underneath.

C. All cleaning equipment and devices should be operated by personnel experienced in the use of such equipment. If the cleaning equipment does not give the desired results required by NTMWD, the Contractor may propose different equipment for consideration and approval by

NTMWD.

D. Buckets, scrapers, porcupines/heavy-duty brushes, and other debris-removing equipment/accessories shall be used as appropriate and necessary in the field in conjunction with the chipping hammers.

E. Contractor shall provide equipment for continuously removing debris and any accumulated water that may be encountered inside the pipe at low spots. There are two low spots inside the pipe. NTMWD will dewater the first low spot and remove an 84-inch flow meter for access. The Contractor is responsible for dewatering the second low spot and continuing to dewater the pipe as necessary during the cleaning activities, including water used for cleaning, rainwater, and any groundwater that enters the pipe.

F. Approximately 30,000 gallons of water are expected to be inside the pipe at the low spot initially, which must be removed by the Contractor. Contractor shall coordinate with NTMWD to determine a suitable disposal location for this water on site.

4.00 EXECUTION

4.01 ACCESS

A. Pipe may be accessed for cleaning from either of two locations or from both locations as described below.

1. North Access will be provided via an existing 84-inch flow meter vault. The vault is provided with a manway access hatch and ladder. The large lid may also be opened to provide additional access. The Contractor is responsible for providing required barriers and fall protection for safe work in and around the vault. NTMWD will remove the 84-inch flow meter prior to beginning work. NTMWD will replace the flow meter following completion of the work.

2. South access is via an approximately 20-ft deep 72” diameter manhole with lid and 36” flanged manway access to the pipe. The Contractor is responsible for providing a ladder, fall protection, and barriers as required to safely access the pipe from this manway.

NTMWD will remove the manway prior to work beginning and replace it after disinfection is complete.

3. An 8-inch vent is available on the pipe as shown in the drawings and may be used if needed for ventilation, material removal, addition of power, dewatering, or otherwise as needed by the Contractor. The gooseneck vent may be removed by NTMWD at the Contractor’s request and replaced when the work is complete.

4. The Contractor is responsible for protecting the integrity of the pipe by preventing any rainwater, mud, or debris from entering the pipe via any of the aforementioned access points. The Contractor is responsible for any cleaning or disinfection required because of any foreign materials entering the access points.

5. The Contractor is responsible for securing and making any open access points safe from trip or fall hazards while working and must secure each access point after completing work for the day.

6. Annotated photos of the aforementioned access points are provided in Exhibit D.

4.02 CLEANING

A. General:

1. All materials, equipment, and personnel necessary to complete the pipeline cleaning must be on the site before the cleaning process begins.

2. Existing chemical feed to the Filter Effluent Control Structure No. 2 shall be locked out and tagged out before starting the cleaning operations.

3. Contractor and NTMWD must coordinate to ensure that the proper lock-out and tag-out procedures are completed and the valves are in the required position before the cleaning process begins.

4. 24/7 access: Permitted work hours are 24 hours a day, 7 days a week. Contractor shall submit proposed work schedule prior to beginning work.

5. Contractor is responsible for providing sufficient ventilation continuously during cleaning operations using blowers and air hoses. Oxygen monitors shall be provided to monitor levels continuously to ensure there is an adequate supply of air at all times.

6. Satisfactory precautions shall be taken to protect the pipe and valves in the pipeline from damage caused by the improper use of the cleaning process or equipment. Any damages done to the pipe or utilities by the Contractor shall be brought to NTMWD’s attention immediately to determine the extent of damage and repairs required. If cracks develop in the original mortar lining of the pipe greater than the width of a dime, or if any of the original mortar lining of the pipe becomes dislodged or damaged from the cleaning process, NTMWD shall be informed immediately. Work shall be paused temporarily until NTMWD develops a repair solution to avoid additional damage. Contractor and NTMWD shall review the cause of damage and any necessary changes to work approach to avoid further damage.

7. Contractor shall not operate any valves, utilities, or existing plant equipment without NTMWD's permission.

8. With NTMWD approval, additional quantities of water from fire hydrants or nearby utility stations may be used for transporting debris.

a. No fire hydrant shall be obstructed or used when there is a fire in the area.

b. Care shall be taken to conserve the water and not use it unnecessarily.

c. All requirements shall be met when accessing a fire hydrant, including but not limited to meters, backflow preventers, and properly trained personnel. It shall be the Contractor’s responsibility to meet all state and local requirements.

d. Contractor is responsible for providing a backflow preventer and all required hose and fittings to connect to NTMWD’s hydrant.

e. Contractor shall provide supplemental water if enough water supply is not available from the fire hydrant.

9. The Contractor will be responsible for recovering any equipment that becomes lodged or lost in the pipeline, including, but not limited to, any cost associated with required evacuation, restoration of roads and easements, repairs to pipes and manholes as needed to restore the pipeline and appurtenances back to their original condition.

10. The Contractor shall restore all working areas to existing conditions at no additional expense to NTMWD.

11. The Contractor is responsible for providing any rock or other surface material required for any laydown, on-site storage, or movement of equipment.

12. All necessary precautions shall be taken to protect the pipe from damage during all cleaning operations. Precautions shall also be taken to ensure that no damage is caused to any structure adjacent to the cleaning operations. Damage to be managed per terms of overall agreement between NTMWD and Contractor.

13. Contractor is responsible for providing plans for emergency evacuation from the pipe and shall be prepared for evacuation from the pipe at all times.

4.03 MATERIAL REMOVAL AND DISPOSAL

A. During construction, the Contractor will be responsible for maintaining a safe and secure environment at all times.

B. Contractor shall protect all components of the operations from vehicular damage by securing the site.

C. Contractor shall keep its haul route and work area(s) neat, clean, and reasonably free of dust, and shall bear all responsibility for the cleanup of any spill.

D. Cleaning shall remove enough debris to maintain 1 inch of sacrificial buildup on the pipe wall.

E. Contractor shall inform NTMWD and the Engineer immediately in the event that the existing pipe or utilities are observed to be in a damaged state or get damaged during the cleaning operations. Operation shall not be resumed until clear directions are received from NTMWD.

F. Dispose of removed materials in accordance with applicable federal, state, and local rules and regulations at a properly permitted waste disposal site. It is the Contractor's sole responsibility to secure a licensed legal dump site to dispose of this material. Under no circumstances shall debris removed from the pipeline be dumped onto streets or into ditches, basins, storm drains, or plant drains.

G. The Contractor is responsible for determining the appropriate means of disposal including any required sampling. Waste profiles from the previous cleaning effort are provided in Exhibit E for reference.

H. A poly sheet may be used by the Contractor to temporarily store the debris on site. Coordinate with NTMWD on selecting the appropriate location for the debris storage. Appropriate dust control measures shall be implemented to prevent the spread of debris while it is temporarily stored. Provide adequate containment measures to protect the debris from rainfall/runoff by covering the accumulated debris using poly sheets or similar material.

Upon completion of the work, the Contractor shall promptly restore the Project site to its pre‑existing condition, or to a condition deemed satisfactory by NTMWD, at the Contractor’s sole cost and expense. This shall include, but not be limited to: removing all equipment, materials, and debris; repairing any damage caused by the work; and restoring the site to a safe, clean, and usable condition consistent with normal wear and tear.

4.04 PIPE DISINFECTION

A. After cleaning is completed, NTMWD will conduct a visual inspection of the pipe using photos and videos provided by the Contractor. NTMWD may request to inspect the pipe in person. If the inspection shows the cleaning to be unsatisfactory, the Contractor shall be required to re-clean and re-inspect the pipeline at those locations until the cleaning is shown to be satisfactory.

B. After satisfactory inspection, the Contractor shall perform a final cleaning of the entire working area of the pipe with a power washer. All rinsate from cleaning activities must be collected by the Contractor (i.e., under no circumstances may cleaning or wash water be sent down the 108” pipe toward the Plant 3 Clearwells).

C. Disinfect the pipe after the debris is removed to the satisfaction of NTMWD and before the system is put into service. The pipe shall be disinfected in accordance with AWWA C651, C652, and C653 (latest revisions). The Contractor will provide Sodium Hypochlorite solution for disinfection and shall spray Sodium Hypochlorite on the pipe surface, meeting the requirements of AWWA B300 and NSF/ANSI Standard 60 Certified for use in potable water systems.

D. NTMWD will assist in filling up the pipe with water for disinfection after the Contractor sprays the disinfectant.

E. NTMWD is responsible for collecting and testing samples of test water from the disinfected system per regulatory standards to verify that the water is acceptable before placing the system in service. If the water test fails to meet the prescribed standards, the Contractor shall repeat the disinfection process until the water meets quality standards for disinfection.

F. NTMWD will be responsible for de-chlorination and disposing of the chlorinated water after the disinfection process is complete.

4.05 MEASUREMENT AND PAYMENT

A. CONTRACTOR will submit a detailed SCHEDULE OF VALUES for the WORK to be performed on the project.

1. CONTRACTOR must submit schedule to OWNER at least ten (10) days prior to submitting the first Application for Payment.

2. Line items in the AGREEMENT are to be used as line items in the schedule of values.

3. Payment will be made on the quantity of Work completed per CONTRACT DOCUMENTS during the payment period.

a. Payment amount is the WORK quantity measured multiplied by the unit prices for that line item in the AGREEMENT.

b. Payment on a unit price basis will not be made for work outside finished dimensions shown in the CONTRACT DOCUMENTS.

c. Partial payments will be made for any lump sum line items in the AGREEMENT.

d. Divide principal subcontract amounts into an adequate number of line items to allow determination of the percentage of work completed for each item.

B. These line items may be used to establish the value of WORK to be added or deleted from the

PROJECT.

C. Correlate line items with other administrative schedules and forms:

1. Progress schedule,

2. List of Subcontractors,

3. Schedule of Submittals

D. Costs for mobilization at start of the PROJECT and demobilization at PROJECT completion shall be listed as a separate line item and shall be actual cost for:

1. Insurance,

2. Transportation and setup for equipment,

3. Transportation and/or erection of all field offices, sheds and storage facilities,

4. Salaries for preparation of submittals required before the first Invoice for Payment,

5. Salaries for field personnel assigned to the PROJECT related to the mobilization of the

PROJECT (Mobilization and demobilization may not exceed 3 percent of the total CONTRACT amount. Cost for mobilization may be submitted only for WORK completed)

6. The sum of all values listed in the schedule must equal the total contract amount.

E. CONTRACTOR is to submit a schedule indicating the anticipated schedule of payments to be made by the OWNER. Schedule shall indicate:

1. The Application of Payment number,

2. Date the request is to be submitted, and

3. Anticipated amount of payment to be requested.

4. Provide written approval of the SCHEDULE OF VALUES as Payment will not be made without this approval.

F. Payment Procedures:

1. Applications for Payment shall be made as the work progresses on a monthly basis.

a. End the payment period on the last day of the previous month and submit an

APPLICATION FOR PAYMENT for OWNER’s review for WORK completed since the end of the last payment period. Agreement is to be reached on:

i. The percentage of WORK completed for each lump sum item,

ii. The quantity of WORK completed for each unit price item,

iii. The percentage of WORK completed for each approved CHANGE ORDER item, and

iv. The amount of retainage to be held.

• 5% retainage shall be held for the entirety of the project. Retainage shall be withheld and may be paid to:

o ensure proper completion of the Work. The Owner may use retained funds to pay replacement or substitute contractors to complete unfinished or defective Work;

o ensure timely completion of the Work. The Owner may use retained funds to pay liquidated damages; and o provide an additional source of funds to pay claims for which the Owner is entitled to indemnification from Contractor under the Contract Documents.

• Retained funds shall be held by the Owner in accounts that shall not bear interest. Retainage not otherwise withheld in accordance with the Contract Documents shall be returned to the Contractor as part of the final payment.

v. On the basis of these agreements the CONTRACTOR is to prepare a final copy of the APPLICATION FOR PAYMENT and submit it to OWNER for review.

b. Monthly Applications for Payment shall be submitted no later than the 10th calendar day of the following month.

c. Upon approval, the OWNER will process payment to CONTRACTOR in accordance with the terms of the AGREEMENT between OWNER and CONTRACTOR.

2. Measurement Procedures

a. Measure the WORK described in the Agreement for payment. Payment will be made only for the actual measured and/or computed percent complete, length, area, solid contents, number and weight, unless otherwise specifically provided. No extra or customary measurements of any kind will be allowed.

G. Failure to Meet Completion Deadline:

1. The Contractor shall complete all cleaning operations within seventy-five (75) calendar days after issuance of the Notice to Proceed (NTP).

2. Failure to complete the work within the required 75-day period will require suspension…