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TABLE 4 <br /> GROUNDWATER POTENTIOMETRIC ELEVATIONS <br /> PG&E LATHROP GAS DEHYDRATOR STATION <br /> SAN JOAQUIN COUNTY, CALIFORNIA <br /> Top of Casing Depth to Groundwater <br /> Well'I.D.* Date Measured ElevationWater Elevation <br /> feet MSL)** feet (feet MSL <br /> MW_1 1/14/93 9.62 7.58 2.04 <br /> B-2 11/25/92 10.08 9.89 0.19 <br /> B-3 11/25/92 13.00 12.79 0.21 <br /> B-4 1125/92 12.57 12.39 0.18 <br /> B-5 1125/92 12.18 12.02 0.16 <br /> B-6 1125/92 12.25 12.08 0.17 <br /> B-7 1125/92 12.14 11.99 0.15 <br /> B-8 11/25/92 12.09 11.92 0.17 <br /> B-9 11/25/92 13.08 12.88 0.20 <br /> NOTES: <br /> * Temporary well casings were installed in borings B-2 through B-9 on November 23 <br /> and 24, 1992,and water levels were measured on November 25, 1992. The well <br /> casings were subsequently removed and the boreholes were abandoned with grout. <br /> **Top of casing elevations were surveyed to Geodetic Survey Hub W474(22.98 ft MSL) <br /> located on the Middle River bridge. <br /> 6-3 <br />