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0Table 1 <br /> Page 7 of 7 <br /> Groundwater Monitoring Data <br /> 1995 to Present <br /> ARCO Service Station No 2130 <br /> 7906 North EI Dorado Street, Stockton, California <br /> Well Elevation Static Water Groundwater Ethyl- Total <br /> Number Date Top of Casing Top of Screen Level Elevation TPHG Benzene Toluene benzene Xylene MTBE Observations <br /> VW-8 05/20/97 NM 4000 4481 NE 25,000 480 290 260 3,900 <120* No FP,No S <br /> VW-8 09/01/98 NM 4000 4023 NA NA NA NA NA NA NA NA <br /> VW-8 12/02/98 NM 4000 3869 NA NA NA NA NA NA NA NA <br /> VW-12 05/20/97 NM 5500 4378 NE 1,500 150 1 58 <1* <6* No FP,No S <br /> VW-12 09/01/98 NM 5500 4065 NA NA NA NA NA NA NA NA <br /> VW-12 12/02/98 NM 5500 3766 NA NA NA NA NA NA NA NA <br /> Analytical results in parts per billion(ppb) <br /> TBE was analyzed using USEPA Method 8020 r <br /> Measurements to feet <br /> Datum in mean sea level <br /> Static water level measured in feet below top of casing <br /> ---=Well not surveyed <br /> <=Below detection limit for the analytic methods used <br /> *=Raised method reporting limit(MRL)due to high analyte concentration requiring sample dilution <br /> **=Raised MRL due to matrix interference <br /> '**=The sample contains discrete non-fuel components eluting in the gasoline range,quantified as gasoline <br /> The chromatogram does not match the typical gasoline fingerprint <br /> [1]=Not sampled,as well is scheduled to be abandoned <br /> TB=Tnp blank <br /> NE=Not evaluated <br /> =Free product <br /> A=Not analyzed <br /> Sheen <br /> CPRE 1ARC0\2130\QTRl_Y12130Q498 XLS <br /> Table 1 f"e�l�tRC�B <br /> I <br />