FROM: James D. Herberg, General Manager
Originator: Kathy Millea, Director of Engineering
SUBJECT:
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TRICKLING FILTER SLUDGE AND SCUM PUMPS REPLACEMENT AT PLANT NO. 1, PROJECT NO. FE19-03
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GENERAL MANAGER'S RECOMMENDATION
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RECOMMENDATION:
A. Receive and file Bid Tabulation and Recommendation for Trickling Filter Sludge and Scum Pumps Replacement at Plant No. 1, Project No. FE 19-03;
B. Award a Construction Contract to Garney Pacific, Inc. for Trickling Filter Sludge and Scum Pumps Replacement at Plant No. 1, Project No. FE19-03, for an amount not to exceed $778,000; and
C. Approve a contingency of $77,800 (10%).
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BACKGROUND
The trickling filters at Orange County Sanitation District (OC San) Plant No. 1, which were completed in 2006, provide approximately 20% of the Plant's secondary treatment capacity.
The treated primary effluent flow is conveyed from the trickling filters to the secondary clarifiers where the solids settle, and the treated effluent is sent to the Orange County Water District for water reclamation. The settled sludge is pumped to the Thickening and Dewatering Centrifuge Facility.
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 Trickling Filter Sludge and Scum Pump Station has only a single pump which has reached the end of its useful life and has failed multiple times in the past, requiring labor-intensive efforts to maintain its reliability. When the pump is not available, sludge is diverted to the Waste Sidestream Pump Station, using more energy and process capacity to move the sludge through the treatment plant.
PROPOSED SOLUTION
Award a Construction Contract for Trickling Filter Sludge and Scum Pumps Replacement at Plant No. 1, Project No. FE19-03. This project will ins...
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