AGENDA TITLE:
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Adopt a Resolution Authorizing Appropriations for Aeration Diffusers System Replacements at White Slough Water Pollution Control Facility ($250,000) (PW)
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MEETING DATE:
July 2, 2025
PREPARED BY:
Public Works Director
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RECOMMENDED ACTION:
Adopt a Resolution authorizing additional appropriations for Aeration Diffusers System Replacements at White Slough Water Pollution Control Facility in the amount of $250,000.
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BACKGROUND INFORMATION:
The FY 2022/23 original appropriation for the Aeration Diffuser System Replacements at the White Slough Water Pollution Control Facility was $3,000,000. The budget appropriation was intended to include funding for construction, engineering services during construction, staff time for inspection and construction management and contingencies related to unforeseen circumstances.
On October 18, 2023, Council awarded a construction contract to WM Lyles Co. in the amount $2,441,000 to replace the existing obsolete aeration diffuser panels that were installed in 2007 with arrays of new diffuser discs. The new technology requires substantially less labor when performing maintenance and eliminates the need to employ a crane for maintenance. This Council action did not authorize the City Manager to execute change orders.
On May 15, 2024, Council authorized the City Manager to execute Change Orders for this project in an amount not to exceed $250,000, and separately authorized Change Order No. 1 in the amount of $47,447.44 to direct the contractor to dewater and clean aeration basins 3 and 4. The work included in Change Order No. 1 was originally planned to be performed by City Staff, however, staff did not have the capacity to complete the work within the project schedule.
To date, project encumbrances for engineering services during construction, construction, and staff costs amount to $2,949,922. Staff is anticipating additional change orders will be needed to complete the ...
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