FROM: Robert Thompson, 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
recommendation
RECOMMENDATION:
Approve a contingency increase of $65,550 (23%) to the Purchase Order Contract with Vicon Enterprise, Inc. for the replacement of digester gas piping at Plant No. 2, Specification No. S-2022-1365BD, for a new total contingency amount of $94,050 (33%).
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BACKGROUND
Digester gas is produced during the solids treatment process at the Orange County Sanitation District (OC San). The digester gas must be handled in accordance with South Coast Air Quality Management District (SCAQMD) and National Pollutant Discharge Elimination System (NPDES) permit requirements. The digester gas produced at OC San is cleaned, compressed, and used as fuel for the Central Generation engines at both treatment plants. In the event the Central Generation engines are unable to consume all the digester gas, the compressed gas is safely incinerated in the emergency gas flares located at each treatment plant.
OC San's asset management engineers and maintenance staff found some deterioration in the piping system associated with the gas flare system at Plant No. 2. The pipe is nearing thirty years old in a difficult marine environment. A scope of work was created to address the corrosion, the work was bid, and the Board of Directors approved a contract award to Vicon Enterprise, Inc. in November of 2022 to complete the work.
RELEVANT STANDARDS
* 24/7/365 treatment plant reliability
* Maintain a proactive asset management program
* Comply with environmental permit requirements
PROBLEM
The onsite assessment performed by the Contractor, Vicon Enterprises, Inc., recommends additional work to performed on the Plant No. 2 gas flare piping system that is not part of the original scope of work. Staff agrees with this assessment.
PROPOSED...
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