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TABLE 3 <br /> GROUNDWATER ANALYTICAL SUMMARY <br /> ARCO Service Station No 6100 <br /> 25775 Patterson Pass Road <br /> Tracy,California <br /> i <br /> i <br /> Ethyl- Total <br /> Sample Date GRO+ Benzene Toluene benzene Xylenes MTBE <br /> ID Collected <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 /> [11=The sample was diluted due to the presence of high levels of non-target analytes resulting in elevated reporting limits <br /> [21=Hydrocarbon pattern is present in the requested fuel quantitation range,but does not resemble the pattern of the requested fuel <br /> [31=Discrete peak @ C-6 <br /> [41=Discrete peak @ C5-C7 <br /> 151=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, <br /> therefore the results for BTEX should be considered estimated with a possible low bias <br /> [61=The reported results may be biased high as demonstrated by a high surrogate recovery due to matrix interference <br /> sr>zArus <br /> Arco_6I00_Quarterly_Data Page 6 of 6 <br />