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Table D-1 <br /> C-!Sparge System Pilot Test - <br /> Groundwater Chemical Analytical Results <br /> Former Unocal Station No 2859 y <br /> r 1665 Pacific Avenue <br /> Stockton, California <br /> WELL SAMPLE ii LL <br /> ID DATE TPHg I �, B T E , -x MtBE <br /> (ppb) b b b b b - _ <br /> Explanations <br /> BTEX = Benzene, toluene, ethylbenzene, xylenes j Analytical Laboratory - <br /> MtBE = Methyl tert-butyl ether _ Sequoia Analytical-(ELAP##1624) <br /> Explanations Cont ' <br /> ppb = parts per billion - <br /> C-Sparge system operational on August 14, 2002 <br /> Notes - - <br /> 'Wells purged prior to sampling - <br /> t <br /> 2 Baseline concentrations - - <br /> 3 Laboratory report indicates gasoline C6-C10 i <br /> i <br /> °MtBE confirmation by EPA Method 8260E �' - <br /> s The opening calibration verification standard was outside acceptance limits by 1% <br /> Although the Laboratory Control Sample verified the accurary of the batch, this should tie considered when <br /> evaluating the data <br /> e Current laboratory analytical results do not coincide with historical data, and although the laboratory <br /> results were confirmed, it appears that the samples were switched ` <br /> Hydrocarbon pattern is present in the requested;fuel�quanfitation range but does not resemble the requested fuel - - <br /> i <br /> I <br /> I - <br /> 06940- 7 6 of 6 - ENSR Corporation <br /> • 0 <br /> ll• I• l• � l• I• l• � l• �g ilirl � r t• � I� �� l� � � <br />