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CITY OF SANTA ANA RFP NO.: 21-059 WATER WELL, PUMP AND MOTOR REHABILITATION AND REPAIR SERVICES testing, well casing patches and similar casing repairs/improvements, and mechanical treatment on well casings. All chemicals used in treating wells shall be State approved for the purpose intended, must be National Sanitation Foundation (NSF) approved, and Public Works approved for quantity and concentration. Disinfection of the wells is required in accordance with American Water Works Association (AWWA) C654 Standard Disinfection of Wells. The Contractor's estimates shall include the type and concentration of chemicals (acids, inhibitors, polymers, neutralizers, etc.) to be used; the typical appropriate contact time for the chemicals; and the typical procedure for introducing, mixing, and neutralizing chemicals in the well. In addition, the name(s) and phone numbers of any company(ies) that will supply the treatment chemicals shall be provided. Completed Material Safety Data Sheets (MSDS) for all chemicals used shall include the methods of mechanical treatment (dual swab, wire/nylon brush, sonar jetting, etc.). The Contractor shall perform wire brushing and it shall be carried out in manner as to clean the casing louvers/perforations and to remove scale and tubercles attached to the wall of the casing. After wire brushing, the well shall be allowed to sit for 24 to 48 hours and sediment fill shall be removed from the bottom of the well to the maximum extent possible using a bailer or scow or equivalent retrieval device. All bailed material (water and sediment) shall be placed in steel drums or appropriate containers. The sediment, after separation from the water, shall be placed in the containers, properly labeled, and eventually removed from the well site for disposal by the Contractor. All bailed material shall be properly disposed of by the Contractor. S. PUMP AND MOTOR REHABILITATION SERVICE The Contractor shall provide rehabilitation services when requested by the City. The Contractor shall rehabilitate of one or more of the following pump units: • Submersibles • Horizontal split case • Vertical turbines Rehabilitation of all pumps and motors may include, but not limited to: • Line shafts • Bearings • Right -angle -gears • Housing/frame • Column pipe • Seals • Impellers • Rotor shaft • Power/control cable attachments • ThermaUmoisture sensors • Vibrational analysis (include report) • All other appurtenant components Upon request, the Contractor shall submit a written proposal to the City for the services described herein. The Contractor shall also include the performance pump curves, manual specifications, and detailed information regarding the new proposed pump and motor within the proposal package, The Contractor