FROM: James D. Herberg, General Manager
Originator: Riaz Moinuddin, Director of Operations & Maintenance
SUBJECT:
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REPLACEMENT OF GAS FLARE PIPING AT PLANT NO. 2
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GENERAL MANAGER'S RECOMMENDATION
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RECOMMENDATION:
A. Approve a Purchase Order to Vicon Enterprise, Inc. for replacement of digester gas piping to three gas flares at Plant No. 2, Specification No. S-2022-1365BD, for a total amount not to exceed $ 285,000; and
B. Approve a contingency of $ 28,500 (10%).
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BACKGROUND
Digester gas is produced as a result of the solids treatment process at the Orange County Sanitation District (OC San). Digester gas must be handled in accordance with the SCAQMD and NPDES permit requirements. The digester gas produced at OC San is cleaned, compressed, and used as fuel for the Central Generation (CenGen) engines at both treatment plants. In the event the CenGen engines are unable to consume all the digester gas, the compressed digester gas is safely incinerated in the emergency gas flares located at each treatment plant.
RELEVANT STANDARDS
* 24/7/365 treatment plant reliability
* Maintain a proactive asset management program
* Comply with environmental permit requirements
PROBLEM
The steel piping associated with three emergency gas flares at Plant No. 2 have reached the end of their useful life due to corrosion and pitting. Repairs have been made to keep the piping in service, but leaks will continue to occur until the piping is replaced.
PROPOSED SOLUTION
Approve a Purchase Order to Vicon Enterprise, Inc. for replacement of the piping associated with the Plant No. 2 digester gas flare system.
TIMING CONCERNS
Digester gas leakage due to piping corrosion associated with the flare piping at Plant No. 2 will occur unless the piping is replaced. Leaking digester gas is an environmental and safety concern.
RAMIFICATIONS OF NOT TAKING ACTION
Failure to replace flare piping could result in health and sa...
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