FROM: Robert Thompson, General Manager
Originator: Mike Dorman, Acting Director of Engineering
SUBJECT:
title
ENGINE AND GENERATOR OVERHAULS AT PLANT NO. 1 AND 2, CONTRACT NO. J-135B
end
GENERAL MANAGER'S RECOMMENDATION
recommendation
RECOMMENDATION:
Approve the addition of funds to include generator overhauls as part of the construction contract with Cooper Machinery Services LLC for the Engine and Generator Overhauls at Plant Nos. 1 and 2, Contract No. J-135B, in the amount of $1,637,117 (5.6%), for a total construction contingency of $4,573,220 (15.6%).
body
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.
In July 2022, a construction contract was awarded to Cooper Machinery Services LLC for Engine and Generator Overhauls at Plant No. 1 and 2, Contract No. J-135B. The work under this contract overhauls four engines and refurbishes five generators.
RELEVANT STANDARDS
* Protect OC San assets
* Maintain a proactive asset management program
* 24/7/365 treatment plant reliability
* Comply with environmental permit requirements
* Use all practical and effective means for resource recovery
PROBLEM
The original contract provided for five generators to be sent to the factory to be tested, cleaned, and minor repairs to be performed at the same time their respective engines are being overhauled. While performing repairs to the first two generators of this project, it was found the rotors and stators both needed to be rewound, which was beyond the original scope of work. During a visual inspection, the stator and rotor windings had heavy carbon buildup with some visible insulati...
Click here for full text