FROM: James D. Herberg, General Manager
Originator: Rob Thompson, Assistant General Manager
SUBJECT:
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REHABILITATION OF SIXTEEN RECTANGULAR CLARIFIERS AT PLANT NO. 1
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GENERAL MANAGER'S RECOMMENDATION
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RECOMMENDATION: Recommend to the Board of Directors to:
A. Award a service contract to J.R. Filanc Construction Company, Inc. for the mechanical rehabilitation and overhaul of sixteen rectangular primary clarifier tanks at Plant No. 1, Specification No. S-2020-1148BD, for a total amount not to exceed $1,319,313; and
B. Approve a contingency of $131,932 (10%).
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BACKGROUND
At Orange County Sanitation District (Sanitation District) Plant No.1, there are 52 rectangular primary clarifier tanks which are the work horse of the wastewater treatment process. Their reliable operation is critical to meet both effluent treatment standards and to provide quality water to the Orange County Water District (OCWD) for reclamation. These primary clarifiers have been in service for a number of years with significant wear, tear, and corrosion of their mechanical systems. The Board of Directors previously authorized, and staff is completing, the first two phases of refurbishment for the primary clarifier tanks. This final phase of refurbishment for the remaining sixteen rectangular primary clarifier tanks is recommended to improve reliability and reduce unscheduled break downs per our asset management philosophy.
RELEVANT STANDARDS
* 24/7/365 treatment plant reliability
* Meet volume and water quality needs for the GWRS
* Maintain a proactive asset management program
PROBLEM
All influent wastewater must go through primary treatment. Due to the age and worn condition of the mechanical components associated with the rectangular primary clarifiers, breakdowns are occurring with increasing frequency. Breakdowns reduce hydraulic capacity at Plant No. 1 and negatively impact flows available to the Groundwater Replenishment Sy...
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