FROM: Robert Thompson, General Manager
Originator: Riaz Moinuddin, Director of Operations & Maintenance
SUBJECT:
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INSTALLATION AND DISPOSAL OF ACTIVATED CARBON MEDIA FOR PLANT NO. 1 AND PLANT NO. 2 CENTRAL GENERATION FACILITIES, SPECIFICATION NO. S-2024-648BD
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GENERAL MANAGER'S RECOMMENDATION
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RECOMMENDATION:
A. Approve a General Services Contract to MP Environmental Services, Inc. to install and dispose of activated carbon media for Plant No. 1 Co-Gen and Plant No. 2 Central Generation (CenGen) facilities, Specification No. S-2024-648BD, for a total amount not to exceed $713,880 for the period beginning January 1, 2025, through December 31, 2025, with four (4) one-year renewal options; and
B. Approve an annual contingency of $71,388 (10%).
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BACKGROUND
The Orange County Sanitation District (OC San) Plant Nos. 1 and 2 CenGen facilities use granular activated carbon to remove siloxane, volatile organic carbon, and sulfur compounds from digester gas. Removing these compounds is necessary to meet air compliance standards, maintenance requirements, and protect emissions catalysts. Failure to remove these compounds will quickly damage both the reduction and oxidation catalysts required for controlling engine emissions.
At Plant No. 1, two vessels are used in series and three vessels are used at Plant No. 2. The first vessel serves as the primary tank for roughing and the second vessel is used for polishing the residual compounds from the biogas. The third vessel at Plant No. 2 is used as a standby. Each vessel has three layers of activated carbon media with different specifications recommended by the system manufacturer to target specific components in the biogas.
RELEVANT STANDARDS
* Maintain a proactive asset management program
* 24/7/365 treatment plant reliability
* Protect OC San assets
PROBLEM
The carbon media used for combustion in the CenGen facilities have limited capacity to absorb pollutants...
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