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TABLE 2 <br /> GROUNDWATER ANALYTICAL RESULTS � <br /> FOR OXYGENATES AND ADDITIONAL COMPOUNDS <br /> i <br /> ARCO Service Station No 5469 <br /> 130 South Wilson Way, Stockton, California <br /> USEPA USEPA <br /> Method 8260 Method 8015.(M2 <br /> Well TBA MTBE DIPE ETBE TAME 1,2-DCA EDS Ethanol Methanol QA/QC <br /> Number Date Review <br /> NOTES <br /> gIL=micrograms per later TBA=Tertiary butyl alcohol QA/QC Review <br /> =Below detection limit for analytical methods used MTBE=Methyl tertiary butyl ether A=Data accepted without qualification <br /> A=Not Analyzed DIPE=Di-isopropyl ether J=Data accepted with qualification <br /> USEPA=U S Environmental Protection Agency ETBE=Ethyl tertiary butyl ether R=Data refected <br /> TAME=Tertiary amyl methyl ether <br /> [1]This sample was analyzed outside of EPA recommended hold time 1,2-DCA=1,2-Dichloroethane <br /> [21 The value reported exceeds the calibration curve but not the linear range EDB_Ethylene dibromide <br /> [3]The reporting limits for this sample have been raised due to the high level of a target compound <br /> [41 The reporting limits for this sample have been raised due to the high levels of non-target mterferents <br /> [51 The continuing calibration standard was outside of the acceptance criteria <br /> [6]There was insufficient preservative to reduce the sample pH to less than 2 The sample was analyzed within 14 days of sampling,but beyond the 7 days recommended for Benzene,Toluene <br /> and Ethylbenzene <br /> [7)Initial result was an estimate,beyond the calibration range of the instrument Sample re-analyzed beyond the EPA recommended hold time Initial result reported in the table <br /> [81 Initial results may be biased high as shown by surrogate recoveries above method acceptance limits(due to matrix interference) Sample re-analyzed outside of EPA recommended hold time Initial result <br /> reported in the table,and should be considered an estimate <br /> [9]The reported results may be biased low since the analyses for these analytes were performed beyond the EPA recommended holding time of 14 days <br /> [I0]The reported results may be biased low as demonstrated by a low surrogate recovery due to matrix interference <br /> [I 1]Initial result not confirmed by re-analysis Re-analysis performed beyond hold time Initial result reported in the table,should be considered an estimate <br /> [12]Initial result for 1,2-DCA confirmed by re-analysts,but re-analysts performed beyond hold time Initial result reported in the table <br /> I <br /> I <br /> 5TRA TU5 <br /> Arco_5469_Quarterly_Data <br /> 9 of 9 <br />