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*E1 <br /> Groundwater Monitoring and Analytical Data <br /> ARCO Service Station No 2130 <br /> 7906 North El Dorado Street, Stockton, California <br /> Elevation Static Water Groundwater Ethyl- Total <br /> Well Top of Casing Top of Screen Level Elevation TPHg Benzene Toluene benzene Xylene MtBE <br /> Number Date (teat m9l) (ft btc) (ft btc) (feet mil) p91L P91L P91L 0911- 0g1L 0g/L <br /> MS 26 12!19102 NM 4142 NE 170 065 <0 50 <050 <0 50 <0 50[2] <br /> 316103 NM 3918 NE 87 1 1 <0 5 099 46 <0 5[2] <br /> 6/11/2003 NM 3869 NE <50 <0 5 <0 5 <0 5 <0 5 <0 5 UJ[2] <br /> 9/23/2003 NM 4261 NE <50 <0 5 <0 6 4 5 <0 5 0 65[2] <br /> MS 3A 12119/02 NM 4126 NE 190 40 <0 50 <0 50 <050 <0 50[2] <br /> 3!6103 NM 3890 NE <50 22 10 10 47 0 9[2] <br /> 6!11!2003 NM 3815 NE <50 <0 5 <0 5 <0 5 <05 11 J[2] <br /> 5123!2003 NM 4217 NE <50 <0 5 <0 5 <0 5 <0 5 0 63[21 <br /> MS 3B 12119/02 NM 4164 NE 1200 26 14 27 <050 71[2] <br /> 3!6103 NM 3923 NE 1,100 6 8 35 71 5 6 19121 <br /> 6/11/2003 NM 3849 NE <50 <0 5 <05 <0 5 <0 5 9 4 J[2] <br /> 9/23/2003 NM 4253 NE <50 <0 5 <0 5 <0 5 <05 0 65[2] <br /> btc=below top of casing <br /> msl=mean sea level <br /> bps=below ground surface NA=Not analyzed NE=Not evaluated <br /> 0gn-=Analytical results In micrograms per liter FP=Free Product <br /> TPHg=Total Petroleum hydrearbons as gasoline(reported as GRO gasoline range organics) S=Sheen <br /> MtBE=methyl tert butyl ether <br /> MtBE was analyzed using US EPA Method 8020 <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 /> [1]=Not sampled as well is scheduled to be abandoned <br /> (2)MtBE was analyzed using VSEPA Method 82608 <br /> [3j Chromatogram Pattern Weathered Gasoline CO C12 <br /> [4]Benzene toluene ethylbenzene and total xylenes were analyzed using USEPA Method 8260B <br /> [5]Chromatogram Pattern Unidentified Hydrocarbons C6 C12 <br /> [6]Hydrocarbon pattern is present in ttte requested quantitation range but does not resemble the pattem of the requested fuel <br /> K 1Wproces31J5 BP AR001021301Ouanerlyl3 QTR 0312130 GWMR 3003 12 0f 13 <br />