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• Tablo 0 <br /> Groundwater Monitoring Data Page 3 of 3 <br /> ARCO Service Station No. 2186 <br /> 3212 North California Street <br /> Stockton, California <br /> Well Elevation of Static Water[l] Top of Elevation of Groundwater Total <br /> Sample No. Date To2 of Casing Level Screen(21 Groundwater Flow Direction TPHG Benzene Toluene Eth (benzene Xylenes MTBE[31 Observations <br /> VW-3 03/21/97 NM 42.49 NM --- 180 <0.5 <0.5 <0.5 <0.5 <3 No FP, No S <br /> VW-3 05/22/97 NM 44.28 NM --- 240 <0.5 <0.5 <0.5 <0.5 <3 No FP, No S <br /> VW-3 08/20/97 NM 50.21 NM --- 200 <0.5 <0.5 <0.5 <0.5 <5 No FP, No S <br /> VW-3 11/20/97 NM 49.46 NM --- 160 4.6 4.4 2.6 6.7 <5 No FP, No S <br /> VW-3 02/17/98 NM 44.72 NM --- 93 <0.5 <0.5 <0.5 <0.5 <5 No FP,No S <br /> VW-3 06/24/98 NM 36.28 NM --- <50 <0.5 <0.5 <0.5 <0.5 <5 No FP, No S <br /> VW-3 09/21/98 NM 39.69 NM --- 227 4.56 <0.5 2.22 3.24 15.9 No FP,No S <br /> 1 TPHG=Total petroleum hydrocarbons as gasoline. Analytical results in parts per billion(ppb). <br /> MTBE=Methyl tert-butyl ether. Elevation datum is mean sea level. <br /> [1]Measured below top of casing. <=Below detection limit for the analytical method used. <br /> [2]Measured from ground surface. FP=Free product.Measured in feet. <br /> [3]MTBE was analyzed using USEPA Method 8020. S=Sheen. <br /> *=Raised MRL due to high analyte concentration requiring sample dilution. NM=Not measured. <br /> **=Reporting limit raised due to matrix interference. NA Not analyzed. <br /> CP1D:1QMR13RDQTRARC012186Q398.XLS <br /> Table 1 11/13/98 <br />