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1 <br />' Quarterly Monitoring Report July 2000 <br /> Canepa s Car Wash(Pacific Avenue) <br /> Page -3 <br /> / The groundwater samples obtained from MW-1, MW-3, and MW-7 were collected by filling two 40- <br /> milliliter glass vials with groundwater directly from the pump discharge tubing at a reduced rate The <br /> sample containers were labeled, placed in a cooler chilled with ice, and delivered, in accordance with <br /> chain-of-custody procedures, to GeoAnalytical Laboratories, Inc in Modesto, California, for analyses <br /> 4.0 GROUNDWATER MONITORING RESULTS <br /> 4.1 GROUNDWATER ELEVATION CONTOURS <br /> On July 10, 2000, the depth to groundwater was measured in each monitor well prior to the collection of <br /> groundwater samples The average depth to groundwater was approximately 32 8 feet below the well <br /> measuring points The measuring points are slightly below the ground surface The average depth to <br /> groundwater increased approximately 1 foot since the previous monitoring event conducted in April <br /> 2000 The groundwater elevations ranged from 19 32 to 20 33 feet below mean sea level (bmsl) The <br /> groundwater elevation contour map (Figure 2, Appendix A) indicates groundwater mounding in the <br /> center of the site in the vicinity of MW-1 and MW-2 See Table I (below) for groundwater elevation <br /> data A hydrograph of groundwater elevations is included as Figure 6, Appendix A Note from the <br /> hydrograph in Figure 6 and a comparison of the top of the well casing screen interval versus the depth to <br /> water in Table I that all wells are drowned, i e the water table is 13 to 18 feet above the top of the <br /> screen <br /> TABLE 1 <br /> GROUNDWATER ELEVATION DATA(JULY 10,2000) <br /> MW-1 THROUGH MW-8 <br /> Well Well Casing Well Collar Depth to Groundwater <br /> ID Screen Elevation Water Elevation <br /> Interval (feet) (feet) (feet) <br /> (feet--bgs) <br /> MW-1 50-70 13 45 3287 -1942 <br /> MW-2 50 -70 1327 3259 -1932 <br /> MW-3 50-70 13 50 33 19 -1969 <br /> MW-4 50-70 13 82 3334 -1952 <br /> MW-5 50-70 1269 3235 -1966 <br /> MW-6 45 -65 11 62 31 95 -2033 <br /> MW-7 45 -65 13 18 3350 -2032 <br /> MW-8 45 —65 1326 -3295 -1969 <br /> 4 2 LABORATORY ANALYSES <br /> The groundwater samples were analyzed by GeoAnalytical Laboratories, Inc for total petroleum <br /> Ihydrocarbons quantified as gasoline (TPH-G) by Method 5030/LUFT The groundwater samples were <br /> It� CONDOR <br />