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9 THE CITY OF ri CITY COUNCIL AGENDA REPORT pL£ASANTON. May 1, 2018 Operations Services TITLE: AUTHORIZE A CHANGE ORDER FOR $59,709 WITH PUMP REPAIR SERVICE TO SUBCONTRACT REQUIRED WELL #5 REHABILITATION TREATMENTS TO EATON PUMPS SALES & SERVICE SUMMARY Well #5 is one of three potable water production wells owned and operated by the City of Pleasanton (City). The well failed on November 3, 2017 and must be replaced. At its December 5, 2017 meeting, City Council approved an initial contract with Pump Repair Service to replace the well for $167,068.36 during normal weekday hours. However, due to the unique traffic and pedestrian challenges inherent to the work zone, Council approved a change order for additional overtime estimated at $29,880 on February 20, 2018, to shift as much of the work to the weekend. Upon video inspection of the well casing after the removal of the pump, Utilities staff identified heavy buildup of encrustation and mineral deposits that plugs roughly 65-75% of the screened sections of the well, which need to be rehabilitated prior to the installation of the new pump to prevent potential future damage. Pump Repair is subcontracting the rehabilitation work to Eaton Pumps. RECOMMENDATION Authorize a contract change order with Pump Repair Service Co. to subcontract Well #5 rehabilitation treatment work to Eaton Pumps for the removal of buildup encrustation and mineral deposits in the amount of$59,709 for a total contract amount not-to-exceed $256,657. FINANCIAL STATEMENT CIP 17140 Annual Pump and Motor Repairs is funded in FY17/18 for$110,000 and CIP 18108 Water Pump and Motor Upsizing is funded in FY17/18 with $280,000. The combined unencumbered balances from both CIP's is sufficient to cover the total revised well replacement and rehabilitation cost estimate of$256,657.