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I Table 1 <br /> Groundwater Monitoring Data and Analytical Results <br /> I Chevron Service Station#9-8264 <br /> E 3775 Tracy Boulevard <br /> Tracy,California <br /> EXPLANATIONS j <br /> Groundwater monitoring data and laboratory analytical results prior to May11,2000,were compiled from reports prepared by Blaine Tech Services,Inc <br /> TOC=Top of Casing TPH G=Total Petroleum Hydrocarbons as Gasoline SVOCs II Semilvolatile Organic Compounds <br /> (ft)=Feet B=Benzene VOCs=}Volatile Organic Compounds <br /> GWE=Groundwater Elevation T=Toluene i (ppb)=Pans per billion <br /> (msl)=Mean sea level E=Ethylbenzene __=Not Mer <br /> asued/Not Analyzed <br /> k <br /> DTW=Depth to Water X=Xylenes QA=Quality Assurance <br /> SPHT Separate Phase Hydrocarbon Thickness MTBE=Methyl tertiary butyl ether <br /> a <br /> TPH-D=Total Petroleum Hydrocarbons as Diesel j TOG 1=Total Oil and Grease <br /> k Chromatogram pattern indicated an unidentified hydrocarbon 1 <br /> I ' <br /> z Insufficient preservative to reduce the sample pH to less than 2 Sample ilwas analyzed within 14 days of sampling,but beyond the 7 days recommended <br /> for Benzene,Toluene and Ethylbenzene <br /> I <br /> 3 TOC elevation altered due to casing repairs <br /> 4 Laboratory report indicates gasoline C6-C12 <br /> 5 Laboratory report indicates unidentified hydrocarbons<C16 11 <br /> Diesel data for MW-1 is not available because therelwas not enough sample for extraction <br /> 7 Laboratory report indicates unidentified hydrocarbons C9- 4 l <br /> C2 <br /> & MTBE by EPA Method 8260 <br /> 9 il <br /> Laboratory report indicates second highest MTBE concentration was confirmed by 8260 Initial BTEX analysis indicated that this well appi,ared to <br /> have the highest MTBE concentration I <br /> `0 Laboratory report indicates discrete peaks �I <br /> ii BTEX and MTBE by EPA Method 8260 <br /> 12 Laboratory report indicates the observed sample pattern is not typical of diesel/#2 fuel oil <br /> E I <br /> E � <br /> I <br /> E <br /> i <br /> E <br /> I <br /> 9-8264 A854 As 6=2 <br /> .f II <br />