FROM: James D. Herberg, General Manager
Originator: Riaz Moinuddin, Director of Operations & Maintenance
SUBJECT:
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IMPELLER PUMPS FOR GRIT HANDLING AT PLANT NO. 2 HEADWORKS
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GENERAL MANAGER'S RECOMMENDATION
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RECOMMENDATION:
A. Approve a Sole Source Purchase Order to Flo-Systems, Inc. for the procurement of two Trillium Pumps USA Inc., WEMCO Impeller Pumps for Plant No. 2 Headworks for a total amount not to exceed $128,265, plus applicable sales tax and shipping; and
B. Approve a contingency of $12,826 (10%).
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BACKGROUND
There are currently six Fairbanks Twin Pumps in operation at Plant No. 2 Headworks. These pumps are used for grit handling with three pumps matching a clockwise water vortex and three matching a counterclockwise flow vortex. Fairbanks has discontinued the Twin Pumps line and the manufacturing of all related spare parts.
Orange County Sanitation District (OC San) staff identified WEMCO Impeller Pumps, manufactured by Trillium Pumps USA Inc. which are distributed by Flo-Systems, Inc. as like-kind pump replacements. OC San Engineers verified hydraulic requirements and physical fit of replacement pumps.
RELEVANT STANDARDS
* 24/7/365 treatment plant reliability
* Maintain a proactive asset management program
* Comply with environmental permit requirements
PROBLEM
Existing grit pumps are obsolete and can no longer be reliably maintained. Replacement parts are no longer available for pump repairs.
PROPOSED SOLUTION
Approve the purchase of two in-kind replacement pumps: one clockwise rotation pump and one counterclockwise rotation pump as spare inventory to be added to the warehouse.
TIMING CONCERNS
Existing pumps are 12 years old and showing signs of wear. Spares will be used to replace pumps in operation, as needed.
RAMIFICATIONS OF NOT TAKING ACTION
Extended down time waiting for the purchase of replacement equipment when failures occur.
PRIOR COMMITTEE/BOARD ACTIONS
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