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i • • <br /> TABLE 3 <br /> GROUNDWATER ANALYTICAL SUMMARY <br /> ARCO Service Station No 6100 <br /> 25775 Patterson Pass Road <br /> Tracy, California <br /> Ethyl- Total <br /> Sample Date GRO+ Benzene Toluene benzene Xylenes MTBE <br /> ID Collected /L /L /L /L <br /> NOTES <br /> +=Results through the first quarter 2004 include purgeable hydrocarbons in the range of C6-C 10 QA/QC Review <br /> GRO=Gasoline Range Organics A=Data accepted without qualification <br /> MTBE=Methyl tertiary butyl ether ug/L=micrograms per liter J=Data accepted with qualification <br /> DW=Domestic Well R=Data rejected <br /> [1]=The sample was diluted due to the presence of high levels of non-target analytes resulting in elevated reporting limits <br /> [2]=Hydrocarbon pattern is present in the requested fuel quantitation range,but does not resemble the pattern of the requested fuel <br /> [3]=Discrete peak @ C-6 <br /> [4]=Discrete peak @ C5-C7 <br /> [5]=There was insufficient preservative to reduce the sample pH to less than 2 The sample was analyzed beyond the 7 days holding time for unpreserved samples,therefore the <br /> results for BTEX should be considered estimated with a possible low bias <br /> [6]=The reported results may be biased high as demonstrated by a high surrogate recovery due to matrix interference <br /> Arco_6100_Quarter1y_Data Page 4 of 4 STRATUS <br />