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r <br /> { <br /> li II Table 1 <br /> Groundwater Monitoring Data and Analytical Results <br /> Chevron Service Station#9-8264 <br /> 3775 Tracy Boulevard <br /> ! l Tracy,California <br /> E <br /> EXPLANATIONS l <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 SVOCs=Semivolatile Organic Compounds <br /> (ft) Feet B=Benzene VOCs=Volatile Organic Compounds <br /> GWE=Groundwater Elevation Ti�=Toluene , (ppb)=Parts per billion <br /> I <br /> (msl)=Mean sea level E!Ethylben --=Not Measured/Not Analyzed <br /> zene <br /> DTW w Depth to Water X—Xylenes QA=Quality Assurance/Tnp Blank <br /> SPHT=Separate Phase Hydrocarbon Thickness IM TBE M ethyl tertiary butyl ether <br /> TPH-D=Total Petroleum Hydrocarbons as Diesel TOG=Total Oil and Grease <br /> ' Chromatogram pattern indicated an unidentified hydrocarbon <br /> zInsufficient preservative to reduce the sample pH to less than 2 Sample was analyzed within 14 days of sampling,but beyond the 7 days recommended <br /> for Benzene,Toluene and Ethylbenzene <br /> 3 TOC elevation altered due to cIasmg repairs p <br /> i <br /> aLaboratory report indicates gasoline C6-C12 <br /> S Laboratory report indicates unidentified hydrocarbons<C 16 <br /> 6Diesel data for MW-1 is not available because there was not enough sample for extraction <br /> 7 Laboratory report indicates unidentified hydrocarbons C9-C24 <br /> 8 MTBE by EPA Method 8260 <br /> 9 Laboratory report indicates second highest MTBE concentration was confirmed by 8260 Initial BTEX analysis indicated that this well appeared to <br /> have the highest MTBE concentration <br /> 10 Laboratory report indicates discrete peaks <br /> BTEX and MTBE by EPA Method 8260 !u <br /> ixLaboratory report indicates the observed sample pattern is not typical of diesel/#2 fuel oil <br /> E <br /> 'f r <br /> { <br /> I a <br /> ! • Ale/24/05 ` <br /> 9-8264.06854 I <br />