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CITY OF SANTA ANA RFP NO.: 21-069 WATER WELL, PUMP AND MOTOR REHABILITATION AND REPAIR SERVICES 2, The copper cross -sectional area shall be at least as large as the original winding. 3. Resin Treatment: Windings shall be double -dipped with Class H varnish and baked. 4. Check all coils for overall coil shape. Perform a high frequency turn-tO-tLlrn dielectric test (surge test) in accordance with IEEE 522. Submit test results to the City. This shall be done prior to installation into the stator. �iltu • . _ • .:1 Motor leads shall be replaced as the original leads. Leads will be permanently tagged with non-magnetic markers, Lead lengths shall be identified by the City when a request for service is made. e. Insulation Windings shall be double -dipped with Class H varnish and baked. Insulation shall be tested phase -to - phase and phase -to -ground at 1000 volts do and yield a one minute test result of 1000 meg-ohms or better. f. Final Test A 1000 volt meg-ohm meter shall be used to verify insulation continuity. This reading shall be 100 meg- ohms or greater and documented. After reassembly, motor shall be test -run at full voltage and documentation of current reading and vibration readings shall be provided to the end user. (NOTE: a 5KV meg-ohm meter shall be used on all 4160V motors.) Copper DC resistance tests, phase -to -phase, on rotor winding from slip rings shall be performed. If the rewound rotor fails to pass any test, the rotor shall be rejected. The Contractor shall rebuild and retest until all tests are approved by the City, 8, WELL PUMPING REDEVELOPMENT SERVICES Following mechanical redevelopment, the City may elect to have Contractor proceed with pumping redevelopment which shall consist of intermittent pumping and surging of the well and discharging to waste via permitted storm drain channels. The Contractor shall make adequate provisions for the disposal of water pumped from the well during redevelopment and/or test pumping. Such provisions shall include, but not be limited to, furnishing and installing discharge piping from the pumping unit of sufficient size and length to conduct water to a point as designated by the City and upon request providing temporary storage tanks to contain the discharge. The Contractor shall also furnish acceptable orifices, meters or other approved devices, which will accurately measure the pumping rate. Upon request, an airline complete with properly calibrated gage shall be provided by the Contractor to measure the elevation of water in the well. Contractor may be required to collect pumped groundwater into sedimentation tanks prior to discharge to a storm drain in order to comply with the waste discharge requirements of the regulating agency(s). Redevelopment records shall be maintained showing production rate, total acre footage discharged, and all other pertinent information concerning well development. 9, PRODUCTION TESTING OF REHABILITATED WELLS Upon request, the Contractor shall provide production testing of rehabilitated and or new wells to determine the optimum rate of pumping and shall include a step drawdown test and a constant -rate discharge test in accordance with AWWA Al00-20 standards (latest edition). Prior to the start of the step drawdown test, a period of at least 24 hours of non -pumping conditions shall be met following the pumping development work. The Contractor shall provide qualified personnel during the step-drawdown and constant -rate discharge test and shall ensure proper operation of the pumping test equipment and assist in water level monitoring if requested by the City.