FROM: Robert Thompson, General Manager
Originator: Mike Dorman, Director of Engineering
SUBJECT:
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CENGEN PLANT WATER PIPE REPLACEMENT AT PLANT NO. 1, PROJECT NO. FE19-02
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GENERAL MANAGER'S RECOMMENDATION
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RECOMMENDATION:
A. Receive and file the Bid Tabulation and Recommendation for CenGen Plant Water Pipe Replacement at Plant No. 1, Project No. FE19-02;
B. Award a Construction Contract to Innovative Construction Solutions for CenGen Plant Water Pipe Replacement at Plant No. 1, Project No. FE19-02, for a total amount not to exceed $3,385,000; and
C. Approve a contingency of $338,500 (10%).
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BACKGROUND
The Central Generation (CenGen) Facility at Orange County Sanitation District (OC San) Plant No. 1 was constructed in 1994 to generate electricity using digester gas, while providing heat to the laboratory building, administration building, and digesters. During normal operating conditions, the CenGen Facility at Plant No. 1 supplies approximately 45% of the electricity utilized at Plant No. 1. During a utility power outage, CenGen provides standby power to various major treatment processes. CenGen requires cooling water to operate and keep the engines and ancillary processes cool.
RELEVANT STANDARDS
* Comply with California Public Contract Code Section 20103.8, award construction contract to lowest responsive, responsible bidder
* Commitment to safety & reducing risk in all operations
PROBLEM
The cooling water is highly corrosive and is causing the existing steel pipe and associated joints to develop leaks. The water leaks are currently being managed by OC San's Maintenance Division with temporary solutions such as replacing short pipe segments, installing pipe clamps, welding, or other various short-term repairs. With time, the leaks will increase in occurrence and size. If the cooling water piping system fails, one or more engines will most likely need to be shut down, which will reduce powe...
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