FROM: Robert Thompson, General Manager
Originator: Riaz Moinuddin, Director of Operations & Maintenance
SUBJECT:
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PROCUREMENT OF TWO SPARE RETURN SECONDARY SLUDGE PUMPS AT PLANT NO. 2
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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 Purchase Order to Flo-Systems, Inc. for the procurement of two spare Return Secondary Sludge pumps at Plant No. 2, for a total amount not to exceed $706,855, including applicable sales tax and freight; and
B. Approve a contingency of $141,371 (20%).
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BACKGROUND
The Orange County Sanitation District's (OC San) Trickling Filter/Solids Contact (TF/SC) facility at Plant No. 2 was constructed under Project P2-90 in 2012. The TF/SC facility is rated for a peak flow of 187mgd. The system includes 12 Return Secondary Sludge (RSS) pumps designed to remove collected sludge from six trickling filter clarifiers and recirculate it back to the solids contact aeration basins. Each clarifier is equipped with two RSS pumps. These pumps are exposed to grit and abrasive materials. Pump failures have the potential to disrupt the clarifier availability and negatively impact the TF/SC process.
RELEVANT STANDARDS
* 24/7/365 treatment plant reliability
* Maintain a proactive asset management program
* Comply with environmental permit requirements
* Use all practical and effective means for resource recovery
PROBLEM
The lead time to refurbish and replace the RSS pumps is long. OC San does not have spare replacement pumps in inventory. Failure of an RSS pump places the readiness and operational resiliency of the Secondary Clarifier at risk, which has a detrimental impact on the TF/SC process and presents a risk to GWRS water availability from Plant No. 2.
PROPOSED SOLUTION
Approve a Sole Source Purchase Order to procure two Original Equipment Manufacturer (OEM) RSS pumps as spares, including pump material upgrade and rotor dy...
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