Agenda Information Sheet
DEPARTMENT: Water Utilities
ICM: Howard Martin
DATE: September 12, 2016
SUBJECT
Title
Consider recommending approval of the bid from Xylem Inc. for the purchase of dry pit submersible pumps for the Raw Sewage Pump Station Number 2 at the Pecan Creek Water Reclamation Plant in the amount of $226,852 (RFP#6152).
Body
BACKGROUND
Hazen and Sawyer was retained to do the computational fluid dynamics (CFD) modeling of the flow patterns from the raw wastewater screen to the inlet of the raw wastewater pumps for the Raw Wastewater Pump Station No. 2 (RSPS2). Staff had noticed issues with vibration, noise and limited pumping capacity in the RSPS2 pumps. The CFD analysis showed the approach velocities to the pump suction bells were much higher than recommended by the Hydraulic Institute (HI) Standards, cross flow was visible under the wall across the suction bell of Pump No. 6, and there were signs of swirling flow near the suction bell of Pump no. 6 and No. 7 in particular. The combination of the above hydraulic and structural deficiencies created an inefficient and unsustainable pumping station. The contract with Hazen was amended to provide design services for the replacement of the existing worn out pumps and improve the flow pattern in the existing wet well to the pump inlets.
PUB and Council approved the amendment to the engineering design contract with Hazen and Sawyer (Hazen) for the design of the lift station in March 2016. The design was completed, and a Request for Proposal (RFP) was sent out to equipment vendors. Three vendors responded to the RFP. Based on the RFP submittals the bids were ranked from the three bidders. Xylem Inc. was ranked No. 1, and a Best and Final Offer was requested from the two highest ranked bidders which resulted in a bid of $226,852 from the highest ranked vendor Xylem Inc. The next ranked vendor Pierce Pump submitted a bid of $209,000 (Exhibit 1).
The hardened metal and the advanced design used by ...
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