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Table 1 <br /> Groundwater Monitoring Data 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 SVOCs=Semivolatile Organic Compounds <br /> (ft.)=Feet B=Benzene VOCs=Volatile Organic Compounds <br /> GWE=Groundwater Elevation T=Toluene <br /> (msl)=Mean sea level (Ppb)=Parts per billion <br /> E= (ppb) <br /> --=Not Measured/Not Analyzed <br /> DTW=Depth to Water X=Xylenes QA=Quality Assurance <br /> SPHT=Separate Phase Hydrocarbon'Thickness MTBE=Methyl tertiary butyl ether <br /> TPH-D=Total Petroleum Hydrocarbons as Diesel TOG=Total Oil and Grease <br /> ' Chromatogram pattern indicated an unidentified hydrocarbon. <br /> 2 Insufficient preservative to reduce the sample pH to less than 2. Sample was analyzed yzed witltin 14 days of sampling,but beyond the 7 days recommended <br /> for Benzene,Toluene and Ethylbenzene. <br /> 3 TOC elevation altered due to casing repairs. <br /> 4 Laboratory report indicates gasoline C6-C12. <br /> 3 - 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 /> 7 Laboratory report indicates unidentified hydrocarbons C9-C24. <br /> e 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. <br /> 12 Laboratory report indicates the observed sample pattern is not typical of dieseM fuel oil. <br /> 9-8264.xI MY386854 6 As of 07/15102 , <br />