City Council Agenda
Memo to:
Manteca City Council
From:
Kevin Jorgensen II, Director of Engineering/City Engineer
Prepared by:
Kyzen Nicolas, Associate Engineer;
Somporn Boonsalat, Deputy Director of Engineering
Date:
October 21, 2025
Subject:
WQCF Ammonia Side Stream Treatment (CIP No. 25005) and UV System Rehabilitation Project (CIP No. 25004) - Design-Build Firms Shortlist Approval
Recommendation:
title
Adopt a resolution approving the shortlist of three qualified Design-Build Firms to proceed with the Progressive Design-Build procurement process for the WQCF Ammonia Side Stream Treatment (CIP No. 25005) and Ultra-Violet Disinfection System Rehabilitation (CIP No. 25004) Project 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:
In March 2022, the City of Manteca ("City") completed a capacity assessment study ("Study") for the Wastewater Quality Control Facility ("WQCF"). The Study identified 10 interim improvements needed to improve the WQCF treatment process:
1. Glycerin Injection System (completed and in-service)
2. Replace Waste Activated Sludge ("WAS") Pumps (completed and in-service)
3. Replace Return Activated Sludge ("RAS") Pumps (completed and in-service)
4. Replace Internal Mixed Liquor Recycle Pumps (in construction)
5. Fix Flow Split to North Plant Aeration Basin (in construction)
6. Add New Independent Mixing System to Zone B (in construction)
7. Add Process Aeration Control to Improve Monitoring and Control of Denitrification (in construction)
8. Ammonia Side Stream Treatment (included in this project, CIP 25005)
9. Centrifuge No.3 or Equivalent (in construction)
10. Add DAF No.3 or Equivalent (in construction)
In March 2024, the City adopted the 2024 Wastewater Master Plan which identified additional interim improvement projects needed to improve the WQCF treatment process and among them is the Ultra-Violet Disinfectio...
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