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TABLE 7 <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 Ethyl- Total <br /> Well To of Casing Screen <br /> P $ Level Elevatior. Plow TPHG Benzene Toluene benzene Xylene MTBE[1] <br /> Number bate #feet msl {feet b s feet b s (feet ms]) Direction µ L µ L µ L µ L µ L µ L <br /> MW-10 6125101 16.40 59 38-00 -21.60 E-NE NS NS NS NS NS NS <br /> P 6128/01 16.40 38.18 -21.78 NC <50 51 <0,5 <0.5 <0.5 260[2] <br /> P 9/14/01 16.40 39.64 -23.24 NE <br /> P 12/i4101 16.40 88 4.1 <O.S <0.5 <0.5 44[2] <br /> 40.52 -24.12 NE 77[8] <0.50 <0.50 <0.50 <0.50 35[2] <br /> Isl=mean sea level NS=Not sampled <br /> gs—below ground surface NA=Nat analyzed <br /> g/L=micrograms per liter <=Below detection limit for the analytical methods used. <br /> [I]MTBE was analyzed using USEPA Method 8020. NC=Not calcu'ated <br /> [2]MTBE was analyzed using USEPA Method 8260. <br /> [3]The value reported exceeds the calibration curve,but not the linear range. <br /> [4]Chromatogram Pattern: weathered Gasoline C6-C 12. <br /> [5]The reporting limits for this sample have been raised due to the high level of a target compound. <br /> j ]6]The reporting limit{s}for this sample have been raised due to high levels of non-target inteferenas. <br /> [71 Sample was diluted due to high levels of Benzene. <br /> [81 Hydrocarbon pattern is present in the requested fuel quantitation range but does not resemble the pattern of the requested fuel. <br /> (91 Sample was reanalyzed past EPA recommended holding time. <br /> I <br /> Arco_5469_Qua rterl y_Da l a.XLS <br /> 3 of 3 Delta <br />