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i • • <br /> TABLE 1 <br /> GROUNDWATER MONITORING DATA <br /> ARCO Service Station No. 5169 <br /> 130 South Wilson Way, Stockton, California <br /> Elevation Top of Well Static Water Groundwater Ethyl- Total <br /> Well Top of Casing Screen Level Elevation TPHG Benzene Toluene benzene Xylene MTBE[I] <br /> Number Date (feet msl) (feet b s) (feet b s (feet znsl µglL pglL pg/[_ pg/L q1L gglL <br /> ms1=mean sea level NS=Not sampled <br /> bgs=below ground surface NA=Not analyzed. <br /> µg/L=micrograms per liter <=Below detection limit for the analytical methods used. <br /> 111 MTBE was analyzed using USEPA Method 8020. <br /> [21 MTBE was analyzed using USEPA Method 8260. <br /> [31 The value reported exceeds the calibration curve,but not the linear range. <br /> [41 Chromatogram Pattern: Weathered Gasoline C6-C12. j <br /> [51 The reporting limits for this sample have been raised due to the high level of a target compound. <br /> [61 The reporting limit(s)for this sample have been raised due to high levels of non-target inteferents. <br /> i <br /> 5469QUARTF-RLY Delta <br /> 3 of 8121/01 <br />