FROM: Robert Thompson, General Manager
Originator: Riaz Moinuddin, Director of Operations & Maintenance
SUBJECT:
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PROCUREMENT OF ONE SPARE DRIVE UNIT FOR PRIMARY CLARIFIERS F AND G AT PLANT NO. 2
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GENERAL MANAGER'S RECOMMENDATION
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RECOMMENDATION:
A. Approve a Sole Source Purchase Order to Ovivo USA, LLC, for the procurement of one Ovivo C60LT drive unit for Primary Clarifiers F and G at Plant No. 2, for a total amount not to exceed $147,933, plus applicable sales tax and freight; and
B. Approve a contingency of $29,587 (20%).
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BACKGROUND
The clarifiers at Orange County Sanitation District (OC San) Plant No. 2 are divided into three groups: the A-Side, with four clarifiers, and the B and C-Sides, with five each. These clarifiers were built from the early 1960s to the 1980's and have similar drive units.
The final expansion of the Groundwater Replenishment System (GWRS) split the incoming flows at Plant No. 2 into reclaimable and non-reclaimable flow streams. All non-reclaimable flow is processed through the four A-Side clarifiers, Clarifiers D, E, F and G. Currently, Clarifiers F and G are out of service while the rotating mechanisms are being rehabilitated under project FE23-09.
The rotating mechanisms and drive units for all fourteen primary basins at Plant No. 2 were provided by EIMCO, which is now Ovivo USA, LLC. These rotating mechanisms and drive units are uniquely engineered and are not stock parts.
RELEVANT STANDARDS
* 24/7/365 treatment plant reliability
* Maintain a proactive asset management program
* Meet volume and water quality needs for the GWRS
PROBLEM
Primary Clarifiers at Plant No. 2 are critical assets in the mission of OC San. This is particularly true of the A-Side clarifiers which must be available to support GWRS. Clarifiers F and G are currently out of service due to mechanical failure and severe corrosion. While repairs are underway, these clarifiers remain non-operatio...
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