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' Stockton Plating Inc. <br /> Soil & Groundwater Investigation <br /> April 19, 1994 <br /> - <br /> Page - 8 - <br />' bentonite was tremied j.nto the annular space between the <br /> bentonite and the surface. A water tight traffic box was <br />' installed at the ground surface. Each monitor well head was <br />' secured with a water tight cap and a keyed lock. A well <br /> construction diagram is shown in Figure 7 . _ <br /> 1 <br /> 4.3 Monitor Well Development <br />' On February 15, 1994, a Condor representative was on site to <br /> develop the 3 monitor wells . The wells were developed by first <br /> surging with a 3 inch diameter PVC bailer. A submersible pump <br /> was then used to purge the monitor well. Each well was purged <br /> until the discharge water was free of sediment and clear to the <br /> unaided eye. Each well was purged of approxi-mately 50 gallons of <br /> water. The water discharged from the wells was placed in drums <br /> and left on site to await disposal pending the results of the <br /> groundwater analyses . Disposal of the water will be the <br /> responsibility of SPI . <br /> 4.4 Well Collar Survey <br /> On February 22, 1994, George Harcrow, licensed land surveyor <br />' #6494 of Lew-Garcia-Davis in Ceres, California, surveyed the <br /> monitor well locations and relative elevation of the well <br /> collars . The elevation of the well collars were surveyed with an <br /> accuracy of 0 . 01 foot. The measuring point for water-level <br /> measurements was permanently marked on each well collar. The <br /> �p CONDOR i <br />