FROM: Robert Thompson, General Manager
Originator: Riaz Moinuddin, Director of Operations & Maintenance
SUBJECT:
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CENTRIFUGE DEWATERING LUBRICATION RING PUMP REPLACEMENT AT PLANT NO. 2, PROJECT NO. MP2-015
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GENERAL MANAGER'S RECOMMENDATION
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RECOMMENDATION:
A. Approve a Sole Source General Services Contract with DXP Enterprises, Inc. for the Centrifuge Dewatering Lubrication Ring Pump Replacement at Plant No. 2, Project No. MP2-015, for a total amount not to exceed $211,158; and
B. Approve a contingency of $21,116 (10%).
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BACKGROUND
The Orange County Sanitation District (OC San) Centrifuge Dewatering facility at Plant No. 2 dewaters digested sludge, converts the sludge to biosolids cake and conveys biosolids to the Truck Loading facility for removal using piston pumps capable of operating at 1500 psi discharge pressure. To reduce pumping pressure in the biosolids cake headers, a lubrication ring system was supplied by the piston pump manufacturer. The lubrication ring pumping system supplies lubricant to the biosolids cake headers at various points between the Centrifuge Building and the Truck Loading facility to reduce friction.
The current lubrication ring pumps manufactured by OBL are of foreign origin, costly, and are difficult to procure replacement units or parts for from the manufacturer. OC San staff and the original system design engineer performed an assessment to evaluate alternative pumps that can perform the design function and are readily available. The assessment identified a Milton Roy pump that will perform the intended function with minimal tubing modifications and a similar pressure rating without the need for electrical power or controls upgrades.
RELEVANT STANDARDS
* 24/7/365 treatment plant reliability
* Comply with environmental permit requirements
* Maintain a proactive asset management program
* Operate and maintain facilities to minimize impacts on surrounding communiti...
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