AGENDA TITLE:
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Adopt a Resolution Authorizing City Manager to Execute Amendment No.1 to the Professional Services Agreement with Robertson-Bryan Inc., of Elk Grove, for Aeration Diffuser System Closeout and UV Disinfection System Alternatives Analysis Services ($59,862) PW
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MEETING DATE:
September 16, 2026
PREPARED BY:
Sean Nathan, Interim Public Works Director
recommendation
RECOMMENDED ACTION:
Adopt a Resolution Authorizing City Manager to Execute Amendment No. 1 to the Professional Services Agreement with Robertson-Bryan, Inc., of Elk Grove, for Aeration Diffuser System Closeout and UV Disinfection System Alternatives Analysis Services ($59,862).
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BACKGROUND INFORMATION:
In August 2025, the City entered into a Professional Services Agreement with Robertson-Bryan, Inc. (RBI) for aeration diffuser system project closeout and operational assistance at the White Slough Water Control Facility. The original agreement, based on RBI’s August 11, 2025 proposal, was approved in an amount not to exceed $58,579.
The existing ultraviolet disinfection system at the facility is aging, and certain system components are no longer being manufactured or are becoming increasingly difficult to obtain. In addition, the facility currently has limited redundancy for critical UV components. Staff has been working to locate spare parts. Longer-term evaluations are needed to identify a reliable and cost-effective approach for maintaining disinfection capabilities. RBI submitted a proposal to perform a UV Disinfection System Alternative Analysis. The proposed work includes development and evaluation of alternatives, preparation of a technical memorandum, and project management. The analysis will evaluate potential improvements and/or replacement options and will provide the City with recommendations for moving forward with the UV Disinfection System.
If approved, amendment No. 1 will add the UV alternatives analysis to RBI’s existing scope of services and increase the agreement amount by ($59,862), resulting in the revised total agreement amount of ($118,441)
FISCAL IMPACT:
This project is necessary to minimize maintenance costs, maintain wastewater treatment compliance and to avoid potential fines and penalties from the State. This does not impact the General Fund.
FUNDING AVAILABLE:
Previously approved FY 2026/27 Wastewater Operating Fund (53053003.72450).