FROM: James D. Herberg, General Manager
Originator: Riaz Moinuddin, Director of Operations & Maintenance
SUBJECT:
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POWER HEADS REPAIRS FOR CENTRAL GENERATION ENGINES AT PLANT NOS. 1 AND 2
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GENERAL MANAGER'S RECOMMENDATION
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RECOMMENDATION:
A. Approve additional funds of $60,300.60 to Sole Source Purchase Order 146032-OS, for Cooper Machinery Services to repair 16 spare Engine Power Heads for Engines at Central Generation for Plant Nos. 1 and 2, for a new total amount not to exceed $132,915 plus taxes and shipping; and
B. Approve a contingency of $13,292 (10%).
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BACKGROUND
The Orange County Sanitation District (OC San) operates eight Cooper Bessemer engines which includes three 12 cylinder engines at Plant No. 1 and five 16 cylinder engines at Plant No. 2. The two plants produce approximately 8.2 million kilowatt hours per month, providing approximately 70% of the power required for operation. The Cen Gen facilities began service in 1993 to improve air emissions by using clean burn engine technology to convert biogas into electricity and process heat. Additionally, heat recovered from the engines is used in the digestion process at the treatment plants and for absorption chillers at Plant No. 1, providing cooling for the Administration Building, Laboratory Building, Central Generation Building, and Operations Building.
The engines employ a modular design with one interchangeable Power Head per cylinder. OC San purchased 16 spare Power Heads as part of an earlier project to rebuild its engines. That earlier rebuild contractor failed to deliver a working rebuilt engine partially due to out of specification parts. OC San issued an initial Purchase Order for $72,614.40 to Cooper Machinery Services (the Original Equipment Manufacturer) on June 30, 2021 to inspect the 16 spare Power Heads and four cam shafts provided by the unsuccessful rebuild contractor and provide an inspection report, and a quote if repa...
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