FROM: James D. Herberg, General Manager
Originator: Riaz Moinuddin, Director of Operations & Maintenance
SUBJECT:
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PLANT NO. 2 TRICKLING FILTER "A" ROTARY DISTRIBUTOR MAST REPLACEMENT
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GENERAL MANAGER'S RECOMMENDATION
recommendation
RECOMMENDATION: Recommend to the Board of Directors to:
A. Approve a Sole Source Purchase Order Contract to Ovivo USA, LLC (Ovivo) for a direct replacement Center Mast assembly for the Plant No. 2 Trickling Filter "A" solids contact, Secondary Treatment, in an amount not to exceed $461,500, plus applicable sales tax and shipping; and
B. Approve a contingency of $46,150 (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. This Trickling Filter process provides secondary treatment rated at 60 MGD average 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.
RELEVANT STANDARDS
* Commitment to safety and reducing risk in all operations
* Maintain a proactive asset management program
* Maintain a culture of improving efficiency to reduce the cost to provide the current service level or standard
PROBLEM
During scheduled repair activities on the Trickling Filter A rotating gear mechanism, significant damage was found with the Trickling Filter A rotary distributor arm assembly. Trickling Filter A is not available to provide treatment until these structural failures are addressed.
PROPOSED SOLUTION
Staff recommends a sole source purchase order contract to replace the Trickling Filter A Center Mast Assembly by the original equipment manufacturer (OEM), Ovivo.
TIMING CONCERNS
The Trickling Filters at...
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