FROM: James D. Herberg, General Manager
Originator: Riaz Moinuddin, Director of Operations & Maintenance
SUBJECT:
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INSTALLATION AND DISPOSAL OF ACTIVATED CARBON FOR PLANT NO. 1 T&D ODOR CONTROL SYSTEM, SPECIFICATION NO. S-2022-1316BD
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GENERAL MANAGER'S RECOMMENDATION
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RECOMMENDATION: Recommend to the Board of Directors to:
A. Approve a Purchase Order Contract to Karbonous, Inc. to provide Installation and Disposal of Activated Carbon for Plant No. 1 T&D Odor Control System, Specification No. S-2022-1316BD, for a total annual amount not to exceed $202,920 for the period beginning August 1, 2022 through July 31, 2023, with four one-year renewal options; and
B. Approve an annual contingency of $20,292 (10%).
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BACKGROUND
The Thickening and Dewatering (T&D) facility at Plant No. 1 creates nuisance odors associated with operation of the thickening and dewatering centrifuges, the sludge blending tanks, truck loading, and the centrate wetwell. This foul air is treated at the Thickening and Dewatering Odor Control Facility which consists of three trains of chemical scrubbers followed by two activated carbon vessels to ensure that air emissions meet South Coast Air Quality Management District (AQMD) permit and nuisance odor requirements at all times.
The Orange County Sanitation District (OC San) Plant No. 1 T&D Odor Control Facility is equipped with two activated carbon vessels/filter beds for polishing treated foul air. The carbon beds work in a duty/standby configuration to ensure all emissions from the solids processing meet the AQMD permit and nuisance limits.
RELEVANT STANDARDS
* Maintain a proactive asset management program
* 24/7/365 treatment plant reliability
* Protect OC San assets
PROBLEM
The carbon beds in the Plant No. 1 T&D Odor Control Facility adsorb odorant compounds to prevent their release into the ambient air. Over time, the activated carbon loses the ability to hold or store these odorant ...
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