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TABLE 1 • <br /> Groundwater Monitoring and Analytical Data <br /> ARCO Service Station No 2130 <br /> 7906 North EI Dorado Street,Stockton,California <br /> E=levation Top of Static Water Groundwater e=thyl- Total <br /> Well TOC Screen Level Elevation TPHg Benzene Toluene benzene Xylene MtBE <br /> Number hate (feet mal) (ft btc) (ft btc) (feet mal) UgfL AWL ugIL UgfL ug/L ugIL <br /> Notes <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 The chromatogram does not match the typical gasoline fingerprint <br /> bgs = below ground surface <br /> btc = below top of casing <br /> FP = Free Product <br /> msl = mean sea level <br /> MtBE = methyl tert butyl ether MtBE was analyzed using USEPA Method 8020 <br /> NA = Not analyzed <br /> NE = Not evaluated <br /> TOC = Top of Casing <br /> TPHg = Total Petroleum hydrearbons as gasoline(reported as GRO-gasoline range organics) <br /> S = Sheen <br /> pg/L- = Analytical results in micrograms per liter <br /> [1]=Not sampled,as well is scheduled to be abandoned <br /> [2]MtBE was analyzed using USEPA Method 82606 <br /> [3]Chromatogram Pattern Weathered Gasoline C6 C12 <br /> [4]Benzene,toluene,ethylbenzene and total xylenes were analyzed using USEPA Method 82608 <br /> [5)Chromatogram Pattern Unidentified Hydrocarbons C6-C12 <br /> [61 Hydrocarbon pattern is present in the requested quantitation range but does not resemble the pattern of the requested fuel <br /> [7)=Not sampled,insufficient water for sampling <br /> Data Qualifier Deflnitions <br /> U The analyte was analyzed for,but was not detected above the sample reporting limit <br /> J The analyte was positively identified,the associated numerical value is the approximate concentration of the analyte in the sample <br /> N The analysis indicates the presence of an analyte for which there is presumptive evidence to make a`tentative identification" <br /> NJ The analysis indicates the presence of an analyte that has been'tentatively identified"and the associated numerical value represents its approximate <br /> concentration <br /> UJ The analyte was not detected above the reported sample reporting limit However,the reported reporting limit is approximate and mayor may not <br /> represent the actual limit of quantitation necessary to accurately and precisely measure the analyte in the sample <br /> R The sample results are rejected due to identification or other analytical issues <br /> ND Not detected above reported detection limit <br /> K YWprocessU5 SP ARM0213MuarieriM OTrt 0352130 GWMR 4003 13 of 13 <br />