FROM: Robert Thompson, General Manager
Originator: Mike Dorman, Director of Engineering
SUBJECT:
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SUNFLOWER PUMP STATION EFFLUENT CHANNEL REPAIR AT PLANT NO. 1, PROJECT NO. FR1-0026
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GENERAL MANAGER'S RECOMMENDATION
recommendation
RECOMMENDATION: Recommend to the Board of Directors to:
A. Approve a Repair and Replace Services Contract with Structural Preservation Systems, LLC to provide the Sunflower Pump Station Effluent Channel Repair at Plant No. 1 (FR1-0026), Specification No. S-2025-709BD, for a total amount not to exceed $1,944,791; and
B. Approve a contingency of $194,479 (10%).
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BACKGROUND
Orange County Sanitation District (OC San) operates the Sunflower Pump Station, which lifts wastewater from deep trunk sewers into the Headworks at Plant No. 1 for treatment. The pump station uses two screw pumps, each with a capacity of 40 million gallons per day, to convey flows from the Sunflower Trunk Sewer into the treatment process.
Wastewater discharged from the pumps flows into concrete effluent channels before entering downstream facilities. These channels operate under high flow velocities and are exposed to wastewater conditions that require protective coatings to preserve structural integrity. OC San last recoated the effluent channels with a polyurethane coating in 2010 and 2011.
RELEVANT STANDARDS
* Comply with California Public Contract Code Section 20103.8, award construction contract to lowest responsive, responsible bidder
* Maintain a proactive asset management program
* 24/7/365 treatment plant reliability
PROBLEM
The protective coating in both effluent channels at the Sunflower Pump Station has reached the end of its service life and has failed in several areas. The underlying concrete has deteriorated and now requires repair to prevent further damage. Due to the extent of the concrete deterioration, OC San installed temporary support beams in both channels to maintain safe operation.
Constr...
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