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City of Manteca

· City

· California

Professional Engineering Services for Wastewater Quality Control Facility Dilution Study and Thermal Plan Exception Analysis Report

PROPOSALS DUE

October 15, 2026, 5:00 pm PDT

Closed

WHAT THEY WANT

(Summarized from the RFP)

The City of Manteca, California is seeking a qualified professional engineering firm to prepare a Dilution Study and Thermal Plan Exception Analysis Report for its Wastewater Quality Control Facility (WQCF), which discharges to the San Joaquin River. The study will support revision of water-quality-based effluent limits in the WQCF's NPDES permit, including revised ammonia and dieldrin limits under the State Implementation Policy using dilution credits, and will evaluate whether the WQCF can obtain a regulatory exception from the cooling tower requirements of the State's Thermal Plan. A 2006 thermal analysis failed to secure the exception; the consultant must identify why. Selection is qualifications-based, with scope and fee negotiated with the top-ranked firm.

CHANGES SINCE PUBLISHED

No amendments were filed before it closed.

WHAT OTHERS ASKED

No questions were answered in writing before it closed.

ABOUT THIS RFP

RFP number

Not Assigned

Budget

Not Assigned

Published

Entity type

City

State

California

Summarized from the City of Manteca portal.

HOW TO SUBMIT

Electronic proposals only, submitted by email to Elizabeth Cha, Assistant Engineer, City of Manteca Engineering Department, echa@manteca.gov, with a copy to Kyzen Nicolas, Associate Engineer, knicolas@manteca.gov. The proposal must include the cost proposal, a cover letter requesting evaluation on the Scope of Services, identification of all sub-consultants with the percentage of work each will perform, a project approach, a project schedule by task and subtask, and a fee schedule; charts may be 11 x 17. The City accepts no responsibility for delivery to another address or technical issues, and no extensions are granted. Clarification requests go to the same contacts; Q&A and addenda are posted on the City's bid page (https://www.manteca.gov/bids.aspx).

NAICS CODES & TAGS

541330

541620

541380

Water Resource Management

Environmental Consulting

Regulatory Compliance and Permitting

ACROSS 539 RFPS

MORE THAN

1 in 5

1 in 5

RFPs changed their terms while active.

A week of proposal work, based on the published terms.

A week of proposal work, based on the published terms.

DAY 1 · PUBLISHED

PUBLISHED

DAY 16 · THE TERMS CHANGE

DAY 16 · TERMS CHANGE

DAY 25 · DUE

DUE

25 days is the median window from publication to due date; day 16 is the median first change for the 113 that changed. 539 RFPs published and due: July 23 - Sept. 30, 2026.

Bid on five RFPs, and the odds are better than two in three that at least one changes its terms before the deadline. Larger firms have staff tracking this. Start free and you’ll have it at your fingertips too.

This RFP has closed

Proposals were due October 15, 2026, 5:00 pm PDT. Leads tracks active RFPs from posting to deadline.

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"The efficiency of the Leads platform allows us to determine if an RFP is worth the effort in minutes rather than hours. The results speak for themselves, we recently won our first bid, which we initially found on Leads!"

Kiana Stringfield

Founder, AKOMAKONNECT

A week of proposal work, based on the published terms.

A week of proposal work, based on the published terms.

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