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Tab ` <br /> Groundwater Monitoring Da and Analytical Results <br /> Chevron Service Station#9-8264 <br /> 3775 Tracy Boulevard <br /> Tracy,California <br /> EXPLANATIONS <br /> Groundwater monitoring data and laboratory analytical results prior to May 18,2000,were compiled from reports prepared by Blaine Tech Services,Inc <br /> TOC=Top of Casing TPH-G=Total Petroleum Hydrocarbons as Gasoline TOG=Total Oil&Grease <br /> (ft)=Feet B=Benzene (ppb)=Parts per Billion <br /> GWE=Groundwater Elevation T=Toluene =Not Measured/Not Analyzed <br /> (ms])=Mean sea level E=Ethylbenzene <br /> DTW=Depth to Water X=Xylenes <br /> SPHT=Separate Phase Hydrocarbon Thickness MTBE=Methyl tertiary butyl ether <br /> TPH-D=Total Petroleum Hydrocarbons as Diesel <br /> i <br /> i Chromatogram pattern indicated an unidentified hydrocarbon <br /> Z Insufficient preservative to reduce the sample pH to less than 2 Sample was analyzed within 14 days of sampling,but beyond the 7 days <br /> recommended for Benzene,Toluene,and Ethylbenzene <br /> Elevation altered due to casing repairs <br /> Laboratory report indicates gasoline C&C12 <br /> s Laboratory report indicates unidentified hydrocarbons<C16 <br /> 6 Diesel data for MW-1 is not available because there was not enough sample for extraction <br /> I <br /> I <br /> i <br /> I <br /> I <br /> 9 8264 xlsl#386854 5 As of 12/04100 <br />