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TABLE 1 <br /> i <br /> GROUNDWATER MONITORING DATA <br /> ARCO Service Station No. 5469 <br /> 130 South Wilson Way,Stockton,California <br /> Elevation Top of Well Static Water Groundwater Groundwater Ethy]- Total I <br /> Well Top of Casing Screen Level Elevation Flow TPHG Benzene Toluene benzene Xylene MTBE[i] <br /> Number Date feet msl feet b s feet b s feet rnsl Direction µg/L pglL uglL gg/L µglL pg/L <br /> sf=mean sea level NS=Not sampled <br /> bgs=below ground surface NA=Not analyzed <br /> g/L=micrograms per liter <=Below detection limit for the analytical methods used. <br /> [1]MTBE was analyzed using USEPA Method 8020. NC—Not calculated <br /> [2]MTBE was analyzed using USEPA Method 8260. <br /> [3]The value reported exceeds the calibration curve,but not the linear range. <br /> 141 Chromatogram Pattem: Weathered Gasoline C6-C 12. I <br /> I1151 The reporting limits for this sample have been raised due to the high level of a target compound. <br /> [6]The reporting limit(s)for this sample have been raised due to high levels of non-target inteferents. <br /> 117]Sample was diluted due to high levels of Benzene. <br /> I. <br /> I <br /> I � <br /> 4 <br /> I i <br /> I <br /> Arco_5469_Quarterly Data.XLs Delta <br /> 3 of 3 <br /> lill arol <br />