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TABLE 1 <br /> Groundwater Monitoring Data <br /> ARCO Service Station No 2186 <br /> 3212 North California Street, Stockton, California <br /> Elevation of Static Water[t] Screen Elevation of Total <br /> Well Top of Casing Level Interval Groundwater Groundwater TPHG Benzene Toluene Ethylbenzene Xylenes MTBE[31 <br /> Sample No Date feet ms I) feet b s feet b feet msl Flow Direction AWL mOL LPO I L L L Observations <br /> msl=mean sea level TPHG=Total petroleum hydrocarbons as gasoline *=Raised MRL due to high analyte concentration requiring sample dilution <br /> bgs=below ground surface MTBE=Methyl tertiary butyl ether •*=Reporting limit raised due to matrix interference <br /> [I]Measured below top of casing <=Below detection limit for the analytical method used <br /> [2]Measured from ground surface FP=Free product Measured in feet <br /> [3]MTBE was analyzed using USEPA Method 8020 S=Sheen <br /> [41 MTBE was analyzed using USEPA Method 8260 NM=Not measured <br /> [Sj Chromatogram Pattern Weathered Gasoline C6-C 12 NA=Not analyzed <br /> [6]Sample analyzed outside USEPA recommended hold time NS=Not sampled <br /> [7]Hydrocarbon pattern is present in the requested fuel quantitation range,but does not resemble the pattem of the requested fuel <br /> [8]On the chain-okustody forms,samples were identified as MW-l8 MW-2B,and MW-3B,respectively <br /> I <br /> ARCO 21 M_Qu itedy_Daln XLS 7 of 7 <br />