FROM: Robert Thompson, General Manager
Originator: Mike Dorman, Director of Engineering
SUBJECT:
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MACARTHUR PUMP STATION REHABILITATION, PROJECT NO. 7-63
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GENERAL MANAGER'S RECOMMENDATION
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RECOMMENDATION:
A. Approve a Professional Design Services Agreement with Dudek to provide engineering services for MacArthur Pump Station Rehabilitation, Project No. 7-63, for an amount not to exceed $1,140,000; and
B. Approve a contingency of $114,000 (10%).
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BACKGROUND
Orange County Sanitation District (OC San) operates 15 pump stations that support wastewater conveyance throughout its service area. MacArthur Pump Station is an underground pump station that was constructed in 1965 and is located within an easement in the City of Newport Beach, surrounded by commercial land uses. An existing 21-inch influent pipeline conveys flow into the wet well, and flows exit the pump station through recently constructed 10-inch dual force mains. The facility was last rehabilitated in 1989.
RELEVANT STANDARDS
* Comply with California Government Code Section 4526 to engage the best qualified firm "on the basis of demonstrated competence and qualifications" and "negotiate fair and reasonable fees"
* Operate and maintain facilities to minimize impacts on surrounding communities, including odor, noise, and lighting
* Protect OC San assets
PROBLEM
Due to the age of the pump station, many internal assets are reaching the end of their useful life. Recent inspections and a condition assessment of the facility identified coating failures in the wet well and corrosion within both the wet and dry wells, including corrosion on mechanical equipment.
PROPOSED SOLUTION
Approve a Professional Design Services Agreement to rehabilitate the pump station within the existing footprint, including both the wet well and dry well. The wet well concrete will be rehabilitated and lined. The pump room and electrical rooms within the dry well ...
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