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r <br /> Table 1 <br /> Groundwater Monitoring Data <br /> ARCO Service Station No. 2186 <br /> 3212 North California Street <br /> Stockton, California <br /> Well Elevation of Static Water[1] Elevation of Total <br /> „y <br /> Sample Number Date Top of Casing Level Groundwater TPHG Benzene Toluene Etlt lbenzene Xylenes Observations <br /> MW-1 09/25/95 14.65 58.05 -43.40 20,000 780 2,000 690 4,100 No FP,No S <br /> ��• 10/23/95 14.65 57.89 -43.24 20,000 590 1,100 600 3,600 No FP,No S <br /> 12/22/95 14.65 53.78 -39.13 730 3.5 <1 [2] 13 13 No FP,No S <br /> 02/16/96 14.65 50.13 -35.48 1,200 22 <1 [2] 51 24 No FP,No S <br /> MW-2 09/25/95 15.49 59.01 -43.52 <50 <0.5 <0.5 <0.5 2.0 No FP,No S <br /> - 10/23/95 15.49 NM NM NA NA NA NA NA NM <br /> 12/22/95 15.49 54.76 -39.27 <50 <0.5 <0.5 <0.5 <0.5 No FP,No S <br /> 02/16/96 15.49 51.16 -35.67 <50 <0.5 <0.5 <0.5 <0.5 No FP,No S <br /> MW-3 09/25/95 14.55 57.90 -43.35 <50 <0.5 <0.5 <0.5 <0.5 No FP,No S <br /> r 10/23/95 NM NM NM NA NA NA NA NA NM <br /> J 12/22/95 14.55 53.59 -39.04 <50 <0.51 <0.5 <0.5 <0.5 No FP,No S <br /> 02/16/96 14.55 49.99 -35.44 <50 <0.5' <0.5 <0.5 <0.5 No FP,No S <br /> [1]Measured below top of casing. <br /> [2]liaised MRL due to high analyte concentration requiring sample dilution. <br /> Analytical results in parts per billion(ppb). FP=Free product. Measurements in feet. <br /> Elevation datum is mean sea level. S=Sheen. <br /> TPHG=Total petroleum hydrocarbons as gasoline. NM=Not measured. <br /> =Below detection limit for the analytical method used. NA=Not anal <br /> 1 <br /> N:VlsX0805\I47021031196aLx1s Revision 1:3122196 <br />