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Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station No. 548 <br /> 1612 W. Hammer Lane, Stockton, CA <br /> TOC Depth to Water Leve! Ethyl- Total <br /> Well Date P/ Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO <br /> Number Sampled NP {feet msl) (feet bas} (feet msl} (Nall-) ({rg1L) {EeglL) (Nall-} (Ng/L) (pg/L) {Nall-) (mglL} Comments <br /> 77 The sample contains a lower boiling point hydrocarbon mixture quantified as gasoline;the chromatogram does not match the typical gasoline fingerprint. <br /> '-Raised MRL due to high analyte concentration requiring sample dilution. <br /> [2]MTBE was analyzed using USEPA Method 8260. <br /> [3]Hydrocarbon pattern is present in the requested fuel quantitation range,but does not resemble the pattern of the requested fuel. <br /> [41 The sample was diluted due to the presence of high levels of target analytes resulting in elevated reporting limits. <br /> [5]The sample was diluted due to the presence of high levels of non-target analytes resulting in elevated reporting limits. <br /> 3/11/2004-VW-5S and VW-5D data rejected due to a discrepency during sampling. <br /> Data Qualifier Definitions: <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 concentration. <br /> UJ=The analyte was not detected above the reported sample reporting limit. However,the reported reporting limit is approximate and may or may not represent the actual limit of quantitation <br /> 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 /> Report Date:May 17,2004 Page 14 of 14 <br />