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TABLE 1 <br /> GROUNDWATER MONITORING DATA <br /> rARCO Service Station No. 5469 <br /> i <br /> i <br /> 130 South Wilson Way, Stockton,California <br /> Elevation Static Water Groundwater Ethyl- Total <br /> Well Top of Casing Level Elevation TPHG Benzene Toluene benzene Xylene MTBE[1] <br /> Number Date (feet msl) (feet bgs) (feet MSI) pg/L EtgIL µg/l- 41 gglL �tg/L Observations <br /> MW-6 NP 06/21/00 15.89 36.42 -20.53 <50 <2.0 <2.0 <2.0 <2.0 4,120[2] No FP,No S <br /> NP 09/08/00 15.89 38.07 -22.18 <50 <0.5 <0.5 <0.5 <0.5 6,320[2] No FP,No S <br /> NP 12/11/00 15.89 38.39 -22.50 <500[5] <5.0[5] <5.0[5] <5.0[5] <5.0f5] 6,910[2] No FP,No S <br /> P 03/22/01 15.89 37.13 -21.24 <500[5] <5.0[5] <5.0[5] <5.0[51 <5.0[5] 8,290[2] No FP,No S <br /> sl=mean sea leve! <br /> I <br /> gs=below ground surface FP=Free product. <br /> g/L=micrograms per liter NA=Not analyzed. <br /> [11 MTBE was analyzed using USEPA Method 8020. S=Sheen. <br /> [21 MTBE was analyzed using USEPA Method 8260. <=Below detection limit for the analytical methods used. <br /> [3)The value reported exceeds the calibration curve,but not the linear range. <br /> [4)Chromatogram Pattern: Weathered Gasoline C6-C12. <br /> [5]The reporting limits for this sample,have been raised due to the high level of target compound. <br /> [6]The reporting limit(s)for this sample have been raised due to high levels of non-target inteferents. <br /> I <br /> i <br /> I <br /> CAARC01546%QTRLY12000L5469 Quarterly Data.XLS Delta <br /> 2 of 2 <br /> 4127101 <br />