FROM: Robert Thompson, General Manager
Originator: Riaz Moinuddin, Director of Operations & Maintenance
SUBJECT:
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TRICKLING FILTER C CENTER MAST ASSEMBLY REPLACEMENT AT PLANT NO. 2, PROJECT NO. MP2-019
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GENERAL MANAGER'S RECOMMENDATION
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RECOMMENDATION:
A. Approve a Sole Source General Services Contract to Jamison Engineering Contractors, Inc. for Trickling Filter C Center Mast Assembly Replacement at Plant No. 2, Project No. MP2-019, for a total amount not to exceed $274,800 and;
B. Approve a contingency of $27,480 (10%).
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BACKGROUND
The Orange County Sanitation District (OC San) trickling filters at Plant No. 2 consist of three 150-foot diameter rotating assemblies. This trickling filter process provides secondary treatment rated at an average of 60 MGD during dry weather and approximately 182 MGD during peak wet weather capacities. The trickling filters are engineered to remove the organic content in wastewater utilizing micro-organisms living on the filter media. Each trickling filter is equipped with a motor-operated rotary distributor assembly to uniformly distribute the primary treated flow over the media.
The Center Rotating Mast Assembly procurement and fabrication for Trickling Filter C was approved by the Board in December 2023. The equipment is scheduled to be shipped to Plant No. 2 for installation in August 2024.
RELEVANT STANDARDS
* Maintain a proactive asset management program
PROBLEM
Trickling Filter C Center Rotating Mast Assembly is showing signs of structural cracks, and a replacement Center Rotating Mast Assembly structure was approved for fabrication in December 2023 and will be delivered to Plant No. 2. The new structural element needs to be installed in Trickling Filter C.
PROPOSED SOLUTION
Replace Trickling Filter C Center Mast structure provided by Ovivo USA, LLC, the original equipment manufacturer (OEM), using the exclusive OEM qualified installation contractor in ...
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