FROM: Robert Thompson, General Manager
Originator: Riaz Moinuddin, Director of Operations & Maintenance
SUBJECT:
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PURCHASE AND INSTALLATION OF CENTRIFUGE ISOLATORS AT PLANT NO. 1
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GENERAL MANAGER'S RECOMMENDATION
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RECOMMENDATION: Recommend to the Board of Directors to:
A. Approve a Sole Source General Services Contract to GEA Mechanical Equipment US, Inc. for the purchase and installation of isolator units on six (6) Thickening and Dewatering centrifuges, for a total amount not to exceed $696,726; and
B. Approve a contingency of $69,673 (10%).
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BACKGROUND
Orange County Sanitation District's (OC San) Plant No. 1 Thickening and Dewatering facility consists of three GEA Mechanical Equipment US, Inc. (GEA) Separator Thickening Centrifuges and three GEA Dewatering Centrifuges, and two spares. Thickening centrifuges improve sludge quality while increasing the solids density, leading to an improved biosolids process. Dewatering centrifuges remove water from biosolids to make the material suitable for truck transportation, resulting in fewer truckloads of biosolids being hauled offsite.
The sludge thickening and the biosolids dewatering processes are central to the biosolids recycling program and complying with OC San operating permits. The isolators play a critical role in absorbing and dispersing vibration on the centrifuges.
RELEVANT STANDARDS
* 24/7/365 treatment plant reliability
* Maintain a proactive asset management program
* Operate and maintain facilities to minimize impacts on surrounding communities, including odor, noise, and lighting
PROBLEM
OC San has identified critical Original Equipment Manufacturer (OEM) equipment that requires major service in accordance with manufacturer specifications. This service interval is a 5-year maintenance schedule (or 40,000 hours) that is vital to maintaining reliability of our centrifuges. With potential lengthy lead times of up to one year, schedulin...
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