City Council Agenda
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Memo to: |
Manteca City Council |
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From: |
Michael Selling, Director of Engineering/City Engineer |
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Prepared by: |
Wing Chang, Assistant Engineer; Somporn Boonsalat, Deputy Director of Engineering |
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Date: |
November 17, 2026 |
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Subject: |
Well 22 PFAS Treatment Facility Project CIP No. 26033 - Award of Construction Contract |
Recommendation:
title
Adopt a resolution determining Conco West, Inc. as the lowest, responsive, and responsible bidder for the Well 22 PFAS Treatment Facility Project CIP No. 26033 (District 1: at Walnut Place Park); awarding the construction contract to Conco West, Inc. in the amount of $2,844,000; approving a budget appropriation of $4,200,000 in the Water O&M Fund (Fund 680) to CIP No. 26033; approving a project contingency of $2,610,736; approving the California Environmental Quality Act Notice of Exemption determination (exempt from CEQA pursuant to 14 Cal. Code Regs. § 15301(b)); and authorizing the City Manager or designee to take all appropriate actions necessary to carry out the purpose and intent of the resolution.
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Background:
The Environmental Protection Agency (EPA) adopted new national drinking water standards for six Polyfluoroalkyl Substance (PFAS) compounds. Public water systems must complete initial monitoring and begin compliance monitoring and reporting by 2027. Full compliance with all Maximum Contaminant Levels (MCL) must be achieved before 2029. Water quality testing has detected PFAS compounds in Well 22 at concentrations exceeding the advisory levels set by the EPA.
The City of Manteca (City) joined a class action lawsuit against PFAS manufacturers 3M, DuPont, Tyco, and BASF for a settlement to be used towards known PFAS treatment.
To date, $2,188,232 has been appropriated to the Project account that the city received from settlement revenue.
On October 21, 2025, the City Council was notified by the Water Division that Perfluorooctanoic Acid (PFOA) and Perfluorohexane Sulfonic Acid (PFHxS), chemicals commonly used in a wide range of products and industrial processes, were detected in raw water source samples from Well 22 at levels exceeding the State Water Board’s Division of Drinking Water (DDW) Notification Levels.
On October 23, 2025, City Staff released a Request for Proposals (RFP) on the City’s website for professional design services to prepare the Plans and Specifications for Well 22 PFAS Treatment Facility.
On January 06, 2026, the City approved Agreement C2026-08 for preliminary design and field-testing services with Kleinfelder, Inc. for an amount not-to-exceed $200,000.
On May 12, 2026, the City approved Amendment No.1 in the amount of $733,496 to Agreement C2026-08 with Kleinfelder for design services with a total not-to-exceed amount of $933,496.
On September 15, 2026, the City Council approved the PS&E and authorized a Call for Bids.
On September 23, 2026, the Project was advertised for bid in the local newspaper and posted on the City’s website.
On September 29, 2026, Engineering was made aware of additional PFAS detection at Well 17 located at Joshua Cowell Elementary School (District 2). Due to similar well production capacity and scope, engineering staff intends to include the required Well 17 work, estimated at roughly $2,000,000, as a change order to the current Project.
On October 15, 2026, the City received and opened five (5) bids:
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Contractor |
Bid |
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Conco West, Inc. |
$2,844,000.00 |
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West Valley Construction |
$2,853,045.00 |
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TNT Industrial Contractor Inc. |
$3,166,700.00 |
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GSW Construction Inc. |
$3,179,200.00 |
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Mountain Cascade Inc. |
$3,057,000.00 |
The lowest 3 bids are within 10% of each other, indicating competitive bidding.
Staff has reviewed and determined that the Project is Categorically Exempt under the California Environmental Quality Act (CEQA) based on Article 19 Section 15301(b), Class 1 “Existing…public utility services”, which includes the additional work for Well 17.
A Notice of Exemption will be filed with the San Joaquin County Clerk/Recorder and the State Clearinghouse for the Project within five days of approval pursuant to 14 Cal. Code Regs. § 15094.
Fiscal Impact:
The expense breakdown of the total project cost is as follows:
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Description |
Original Contract |
Estimate |
Total |
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Consultant Contract |
$933,496 |
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$933,496 |
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Construction Contract |
$ 2,844,000 |
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$ 2,844,000 |
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Project Contingency, including Well 17 work |
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$ 2,610,736 |
$ 2,610,736 |
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$6,388,232 |
The project funding breakdown is as follows:
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Description |
Amount |
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Fund 680 - Water O&M PFAS Settlement Revenue |
$2,188,232 |
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Fund 680 - Water O&M |
$4,200,000 |
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Total |
$6,388,232 |
There is sufficient funding in the Water Operation & Maintenance Fund (Fund 680) for this project’s expenditure.
Documents Attached:
1. Attachment 1 - Resolution
2. Attachment 2 - Location Map
3. Attachment 3 - Construction Contract
4. Attachment 4 - Notice of Exemption