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Tal , <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[1] Top of Elevation of Groundwater Total <br /> Sample No. Date Top of Casing Level Screen r2l Groundwater Flow Direction TPHG Benzene Toluene Eth lbenzene Xylenes MTBE[31 Observations <br /> MW-4 03/31/99 13.83 33.85 -20.02 N-NE <50 <0.5 <0.5 <0.5 <0.5 7.96 No FP,No S <br /> VW-3 05/23/96 NM 45.76 41.80 NM --- 290 <0.5 <0.5 <0.5 <0.5 <3 No FP,No S <br /> VW-3 09/19/96 NM 54.02 NM --- 310 <0.5 <0.5 <0.5 <0.5 <3 No FP, No S <br /> VW-3 11/27/96 NM 51.15 NM --- 280 <0.5 <0.5 <0.5 <0.5 <3 No FP, No S <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 <05 <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 <m 2.22 3.24 15.9 No FP,No S <br /> VW-3 12/14/98 NM 37.90 NM --- 57.1 <0.5 <0.5 <0.5 1.05 <5 No FP,No S <br /> VW-3 03/31/99 NM 35.81 NM --- <50 <0.5 <0.5 <0.5 <0.5 <5 No FP,No S <br /> 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 /> [11 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 /> CP1E:1ARCO1218610TRLY12186Q 199.XLS <br /> Table 1 ?h <br />