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Talftd <br /> Groundwater Monitoringw and Analytical Results <br /> Chevron Service Station#9-4275 <br /> 2905 West Benjamin Holt Drive <br /> Stockton,California <br /> ............... X. <br /> .... ............ . ...... <br /> MTBE <br /> .. . ....................... <br /> DATE- 'b <br /> . pp <br /> Pb) <br /> TRIP BLANK(cont) <br /> 09110198 <50 <0.5 <0.5 <0.5 <0.5 <2.5 <br /> 12/17198 <50 <0.5 <0.5 <0.5 <0.5 <2.5 <br /> 03/10/99 <50 <0.5 <0.5 <0.5 <0.5 <2.5 <br /> 06/22/99 <50 <0.5 <0.5 <0.5 <0.5 <2.0 <br /> 09/13/99 <50 <0.5 <0.5 <0.5 <0.5 <2.5 <br /> 12116/99 <50 <0.5 <0.5 <0.5 <0.5 <2.5 <br /> 12/22/99 <50 <0.5 <0.5 <0.5 <0.5 <5.0 <br /> 03/09/00 <50 <0.5 <0.5 <0.5 <0.5 <5.0 <br /> 06113/00 <50.0 <0.500 <0.500 <0.500 <0.500 <5.00 <br /> 09/13/00 <50.0 <0,500 <0.500 <0.500 <0.500 <5.00 <br /> 12114100 <50.0 <0.500 <0.500 <0.500 <1.50 30.0" <br /> 03102/01 (S) <50 <0.50 <0.50 <0.50 <0.50 <2.5 <br /> 03/02/0 P (K) <50 <0,50 <0.50 <0.50 <0.50 <0.50 <br /> 05110101 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <br /> EXPLANATIONS: <br /> Groundwater monitoring data and laboratory analytical results prior to June 13,2000,were compiled from reports prepared by Blaine Tech Services,Inc. <br /> TOC=Top of Casing B=Benzene --=Not Measured/Not Analyzed <br /> (ft.)=Feet T=Toluene (D)=Duplicate <br /> GWE=Groundwater Elevation E=Ethylbenzene (A)=Anomalous <br /> (msl)=Mean sea level X=Xylenes (S)=Sequoia Analytical <br /> DTW=Depth to Water MTBE=Methyl tertiary butyl ether (K)=Kiff Analytical <br /> TPH-G=Total Petroleum Hydrocarbons as Gasoline (ppb)=Parts per billion <br /> I Laboratory report indicates weathered gasoline C6-C12. <br /> 2 Laboratory report indicates gasoline C6-C12. <br /> 3 Laboratory report indicates unidentified hydrocarbons C6-C 12. <br /> 4 The result for this hydrocarbon is elevated due to the presence of single analyte peak(s)in the quantitation range. <br /> 5 Laboratory report indicates weathered gasoline. <br /> 6 Laboratory report indicates sample was reanalyzed on January 2,2001. MTBE did not confirm. Vial did contain headspace. <br /> 7 The TPH-Gasoline result was 1400 ppb which was attributed to the presence of MTBE. <br /> 8 Hydrocarbons were found in the range of gasoline,but do not resemble a gasoline fingerprint. <br /> 9 Analysis by EPA Method 8260. <br /> 9-4275-NF <br />