City Council Agenda
Memo to: Manteca City Council
From: George Montross, Director of Utilities
Date: November 17, 2026
Subject: Third Amendment to the Professional Services Agreement with Calgon Carbon Corporation for granular activated carbon exchange services
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Adopt a resolution approving Amendment No. 3 to Agreement C2023-18 with Calgon Carbon Corporation for granular activated carbon exchange services at various groundwater wells, extending the Contract Term to December 31, 2027.
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Background:
On March 23, 2023, the City of Manteca entered into Agreement C2023-18 with Calgon Carbon Corporation (Calgon) for granular activated carbon (GAC) replacement services at various groundwater wells. The agreement had an expiration date of December 31, 2024, and a total compensation amount of $850,000. Amendment No. 1 was executed on September 23, 2024, extending the contact term to December 31, 2025, and increasing compensation by $25,755, for a not to exceed amount of $875,755. Amendment No. 2 was executed on November 25, 2025, extending the contact term to December 31, 2026, and reducing the compensation by $25,755 for a not to exceed amount of $850,000.
Staff recommends approval of Amendment No. 3 with Calgon for GAC replacement services, extending the contract term by one year, to December 31, 2027. All other terms of the agreement remain in full forth and effect.
Fiscal Impact:
The Calgon Agreement is funded in Water Operations and Maintenance Fund (Fund 680). There are sufficient funds available for this amendment.
Documents Attached:
Attachment 1 - Resolution
Attachment 2 - Agreement No. C2023-18
Attachment 3 - Amendment No. 1
Attachment 4 - Amendment No. 2
Attachment 5 - Amendment No. 3