AGENDA TITLE:
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Adopt a Resolution Authorizing the Interim City Manager to Execute Change Order No. 1 for Aeration Diffusers System Replacements at White Slough Water Pollution Control Facility, with WM Lyles Co., of Rocklin, in the amount of $47,447.44 and Authorize the Interim City Manager Additional Change Order Authority in an Amount Not-To-Exceed $250,000 (PW)
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MEETING DATE:
May 15, 2024
PREPARED BY:
Public Works Director
recommendation
RECOMMENDED ACTION:
Adopt a Resolution Authorizing the Interim City Manager to Execute Change Order No. 1 for Aeration Diffusers System Replacements at White Slough Water Pollution Control Facility, with WM Lyles Co., of Rocklin, in the amount of $47,447.44 and authorize the Interim City Manager additional change order authority in an amount not-to-exceed $250,000.
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BACKGROUND INFORMATION:
There are six aeration basins measuring 30 feet wide, 135 feet long, and 18 feet deep at the White Slough Water Pollution Control Facility (“WSWPCF”). The basins are a part of the secondary treatment process that supply dissolved oxygen for the micro-organisms that work to reduce concentrations of nitrogen and ammonia in the wastewater.
The City’s existing aeration diffuser system has presented increasingly difficult maintenance and operational challenges for WSWPCF operations staff since its installation in 2007. In January 2021, staff engaged Robertson-Bryan, Inc (“RBI”) to evaluate replacement options for the aeration system components. The recommended option included replacing the membrane diffuser panels with a system that utilizes an array of disk filters. This technology requires substantially less labor when performing maintenance operations and eliminates the need to employ a crane.
Council awarded the contract to WM Lyles Co., in the amount of $2,441,500 on October 18, 2023 to upgrade the existing aeration system, however staff inadvertently omitted obtaining City Manager change order authority.
Change Order No. 1, if approved, covers time and materials cost for the contractor to perform the dewatering and cleaning of aeration basins 3 and 4. The work was originally intended to be performed by City staff, however staff and equipment were not available to complete the work to meet the project schedule ($47,447.44).
Staff recommends authorizing the Interim City Manager to execute Change Order No. 1 for Aeration Diffusers System Replacements at White Slough Water Pollution Control Facility, with WM Lyles Co., of Rocklin, and authorize the Interim City Manager additional change order authority in the amount not-to-exceed $250,000.
STRATEGIC VISION:
3D. Fiscal Health: Anticipate and advocate against unfunded mandates.
5A: Infrastructure: Develop and maintain a robust infrastructure to support a World class city.
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:
Wastewater Capital (53199000.77020) PWWS-21001.
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Charles E. Swimley
Public Works Director
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Melissa Munoz
Accounting Manager
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Andrew C. Keys
Interim City Manager