FROM: James D. Herberg, General Manager
Originator: Riaz Moinuddin, Director of Operations & Maintenance
SUBJECT:
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PURCHASE OF SODIUM HYPOCHLORITE (BLEACH SOLUTION) FOR ODOR CONTROL AND PLANT WATER DISINFECTION IN THE TREATMENT PLANTS
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GENERAL MANAGER'S RECOMMENDATION
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RECOMMENDATION: Recommend to the Board of Directors to:
Approve a Purchase Order Contract to Olin Corporation for the purchase of bulk Sodium Hypochlorite (Bleach Solution), for the period of September 1, 2022 through November 30, 2022, for a unit price of $1.769/gallon, delivered, plus applicable sales and excise tax, for a total estimated amount of $330,000.
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BACKGROUND
The Orange County Sanitation District (OC San) utilizes sodium hypochlorite for odor control. Foul air is collected in collection lines and the treatment plants and is treated in chemical scrubbers in accordance with AQMD requirements for oxidizing hydrogen sulfide from the odorous air. Bleach is also required per NPDES permit requirements to be available for emergency outfall disinfection purposes. Additionally, bleach is also used for disinfecting plant water.
Staff estimates approximately 62,000 gallons of bleach usage per month at both plants. The price has continually escalated over the last four years from $0.698 per gallon to $0.799 per gallon which was in the within the approved 10% contingency.
RELEVANT STANDARDS
* Maintain a proactive asset management program
* Operate and maintain facilities to minimize impacts on surrounding communities, including odor, noise, and lighting
* Zero odor incidents/events under normal operating conditions for Plant Nos. 1 and 2
PROBLEM
The Chemical Supplier Agreement with Olin Corporation, for the purchase of bulk Sodium Hypochlorite (Bleach Solution), per Specification No. C-2018-939BD, is set to expire August 31, 2022. When staff initiated the agreement renewal process with the supplier, staff was notified of an increase in the unit pri...
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