FROM: Robert Thompson, General Manager
Originator: Riaz Moinuddin, Director of Operations & Maintenance
SUBJECT:
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AGREEMENT FOR THE PURCHASE OF LIQUID CATIONIC POLYMER, SPECIFICATION NO. SSJ#2808
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GENERAL MANAGER'S RECOMMENDATION
recommendation
RECOMMENDATION:
A. Approve a Chemical Supplier Agreement for the Purchase of Liquid Cationic Polymer, Specification No. SSJ#2808 with Polydyne, Inc. for a period of one (1) year beginning February 1, 2025, through January 31, 2026; with up to four (4) one-year optional renewal periods; for a total unit price of $3.873 per active pound delivered plus applicable sales tax; and
B. Approve an annual unit price contingency increase of 3%.
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BACKGROUND
Cationic polymer is used as a thickening agent in several Orange County Sanitation District (OC San) processes. It is blended into primary sludge and secondary waste activated sludge (WAS) for the thickening centrifuges at Plant No. 1. It is used to thicken WAS and Waste Secondary Sludge for the Dissolved Air Flotation Thickeners at Plant No. 2. Cationic polymer is also used to dewater anaerobically digested sludge in dewatering centrifuges at Plant Nos. 1 and 2.
RELEVANT STANDARDS
* Use all practical and effective means for resource recovery
* Comply with regulatory requirements
PROBLEM
The current contract will end on January 31, 2025, with no renewals remaining.
PROPOSED SOLUTION
Staff recommends the Board of Directors approve a Chemical Supplier Agreement with Polydyne, Inc. for the purchase of cationic polymer with an annual unit price contingency increase.
TIMING CONCERNS
The current contract expires on January 31, 2025.
RAMIFICATIONS OF NOT TAKING ACTION
A shortage of cationic polymer would impact OC San's ability to effectively operate the thickening and dewatering processes at both plants. The lack of cationic polymer would reduce the digester operating volumes and increase offsite biosolids hauling volume and co...
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