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P <br /> T <br /> 1 <br /> i <br /> Page 8 of 8 <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 /> Analytical results in parls per billion(ppb) <br /> MTBE was analyzed using USEPA Method 8020 <br /> Measurements in feet <br /> Datum in mean sea level <br /> tatic 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 /> (11=Not sampled,as well is scheduled to be abandoned <br /> B=Trip blank <br /> NE=Not evaluated <br /> FP=Free product <br /> A=Not analyzed <br /> IIS=Sbeen <br /> CF\E\ARC012130\QTRLY12130Q199 XLS <br /> Table 1 A"4& <br />