FROM: Robert Thompson, General Manager
Originator: Mike Dorman, Director of Engineering
SUBJECT:
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DIGESTER GAS COMPRESSOR DRYER REPLACEMENTS AT PLANT NO. 1 AND PLANT NO. 2, PROJECT NO. FE23-01
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GENERAL MANAGER'S RECOMMENDATION
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RECOMMENDATION: Recommend to the Board of Directors to:
A. Approve a Services Contract to Innovative Construction Solutions for Specification No. S-2023-1432BD Digester Gas Compressor Dryer Replacements at Plant No. 1 and Plant No. 2, Project No. FE23-01, for a total amount not to exceed $5,942,500; and
B. Approve a contingency of $594,250 (10%).
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BACKGROUND
Digester gas at Orange County Sanitation District (OC San) is collected from digesters and is compressed before being used as fuel for cogeneration. The digestion process creates a moisture-rich gas and when it is compressed, the water vapor is condensed. This condensed liquid water can result in damage to the cogeneration equipment. Moisture can be removed from the digester gas by cooling through either a refrigerated dryer system or a chilled water dryer system.
Plant No. 1 has one chilled water gas dryer and one refrigerated gas dryer system that run in parallel, and Plant No. 2 has two refrigerated gas dryer systems that run in parallel.
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
* Maintain a proactive asset management program
PROBLEM
The refrigerated dryer system at Plant No. 1 has failed and is currently not in operation. The refrigerated dryer systems at Plant No. 2 are facing age and obsolescence issues, making them difficult to support and maintain.
PROPOSED SOLUTION
Approve a Services Contract for Specification No. S-2023-1432BD Digester Gas Compressor Dryer Replacements at Plant No. 1 and Plant No. 2, Project No. FE23-01. This project will demolish...
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