FROM: James D. Herberg, General Manager
Originator: Rob Thompson, Assistant General Manager
SUBJECT:
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PLANT NO. 1 PEPS PUMP NO. 2 REPAIR
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GENERAL MANAGER'S RECOMMENDATION
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RECOMMENDATION:
A. Approve a Sole Source Purchase Order for Cortech Engineering to rebuild Primary Effluent Pump Station Pump No. 2 at Plant No. 1 for a total amount not to exceed $150,888, plus applicable tax and shipping; and
B. Approve a contingency of $15,089 (10%).
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BACKGROUND
The Orange County Sanitation District (Sanitation District) Plant No. 1 Primary Effluent Pump Station (PEPS) lifts primary effluent from the East Side Primary Sedimentation Basins to the activated sludge facility, AS-1, at Plant No. 1. Additional flows that enter the PEPS wet well are from Central Generation cooling water, plant water strainers, and Dissolved Air Flotation Thickener systems. The PEPS wet well contains three vertical pumps and one submersible pump. Each of the vertical pumps have a nominal pumping capacity of approximately 45 MGD. The PEPS pumps were originally installed over 40 years ago by Project P1-16.
RELEVANT STANDARDS
* 24/7/365 treatment plant reliability
* Maintain a proactive asset management program
* Comply with environmental permit requirements
PROBLEM
PEPS No. 2 pump operates at a significantly reduced capacity due to long-term wear and requires a rebuild. This reduced pumping capacity limits the use of East Side Primary Sedimentation Basins.
PROPOSED SOLUTION
Rebuild PEPS Pump No. 2 through Cortech Engineering (Cortech) who is the sole authorized service repair company for Patterson pumps. Cortech will deliver, install, and assist in pump commissioning and start-up.
TIMING CONCERNS
The proposed repair needs to be completed prior to the next wet weather season to provide sufficient primary treatment redundancy and reliability at Plant No. 1.
RAMIFICATIONS OF NOT TAKING ACTION
If PEPS Pump No. 2 cannot operate pe...
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