FROM: Robert Thompson, General Manager
Originator: Mike Dorman, Director of Engineering
SUBJECT:
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ENGINE AND GENERATOR OVERHAULS AT PLANT NOS. 1 AND 2 PHASE 2, CONTRACT NO. J-135C
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GENERAL MANAGER'S RECOMMENDATION
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RECOMMENDATION: Recommend to the Board of Directors to:
A. Approve a project budget increase of $2,500,000 for Central Generation Engine Overhauls at Plant Nos. 1 and 2, Project No. J-135, for a new total budget of $74,700,000;
B. Award a Sole Source Service Contract to Cooper Machinery Services LLC for Engine and Generator Overhauls at Plant Nos. 1 and 2, Phase 2, Contract No. J-135C, as part of Central Generation Engine Overhauls at Plant Nos. 1 and 2, Project No. J-135, for a total amount not to exceed $28,642,770; and
C. Approve a contingency of $2,864,277 (10%).
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BACKGROUND
In the early 1990s, Orange County Sanitation District (OC San) installed eight internal combustion engines manufactured by Cooper Bessemer at the Central Generation (CenGen) facilities at Plant Nos. 1 and 2 to generate electricity using digester gas. During normal operating conditions, the CenGen facilities supply approximately 60% of the electricity at Plant No. 1 and 95% of the electricity at Plant No. 2. CenGen is also used to provide power to the plants during a utility power outage to maintain permit compliance.
OC San staff performs routine and scheduled maintenance based on hours of runtime, in accordance with the manufacturer's recommendations. A complete engine overhaul is required after 120,000 hours of runtime. There are three engine generator sets (Gensets) at Plant No. 1 and five Gensets at Plant No. 2.
Cooper Machinery Services LLC (Cooper) has completed or will be completing overhauls on Genset Nos. 1 and 3 at Plant No. 1 and Genset Nos. 1, 4, and 5 at Plant No. 2 under Contract Nos. J-135A and J-135B. Contract No. J-135B is scheduled to be completed by April 2026. This is the first complete ...
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