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Table 1 (Continued) <br /> Groundwater Monitoring Data <br /> ARCO Service Station 2168 <br /> 441 Charter Way, Stockton, California <br /> Page 4of4 <br /> Well Elevation Static <br /> Sample or Top or Water Elevation of Ethyl- Total <br /> Number Date Casing Level Groundwater TPHG Benzene Toluene benzene Xylenes Observations <br /> MW-7 <br /> MW-7 10/28/93 8.88 38.11 -29.23 42,000 31,000 9,300 970 6,000 No FP, No S, Yes O or <br /> MW-7 03/23/94 8.88 36.63 -27.75 44,000 3,000 8,600 870 5,600 No FP <br /> MW-7 06/29/94 8.88 37.39 28.51 24,000 850 4,500 630 4,400 No FP, S=NE, O=NE <br /> Analytical results in pans per billion (ppb) <br /> TPHG=Total petroleum hydrocarbons as gasoline <br /> Measurements to feet <br /> Elevation datum is mean sea level <br /> S=Sheen <br /> O=Obvious product odor <br /> FT'= Free product <br /> <=Below detection limit for analytical methods used <br /> Sample designations: <br /> NS= Not sampled <br /> NE = Not evaluated <br /> hfW-4(34) -Well ID and sample de th(feet) <br /> W 24 MW3R - Water sample,sample depth(feet),R=rinsate blank <br /> pj�0805�080511 <br /> 10.1el-94 pas:4 <br />