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I <br /> Table 1 <br /> Groundwater Monitoring Data and Analytical Results <br /> Former Chevron Service Station#9-8632 <br /> 575 Grant Line Road <br /> Tracy,California <br /> EXPLANATIONS- <br /> Groundwater monitonng data and laboratory analytical results prior to June 26,2000,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 and Grease <br /> (ft)=Feet B=Benzene <br /> (ppb)=Parts per billion <br /> GWE=Groundwater Elevation T=Toluene NP=No Purge <br /> (msl)=Mean sea level E=Ethylbenzene ' --=Not Measured/Not Analyzed <br /> DTW=Depth to Water X=Xylenes QA=Quality Assurance <br /> TPH-D=Total Petroleum Hydrocarbons as Diesel MTBE=Methyl tertiary butyl ether <br /> * The survey was completed on November 16,2000,by Virgil Chavez Land Surveying The elevations are based on the data provided by G-R Inc.holding <br /> 11 <br /> TOC of MW-1 Measurements taken at approximate north side of top of box,top of casings were marked at location of measurements <br /> 1 Chromatogram pattern indicates an umdentifled hydrocarbon <br /> 2 EPA Method 5520 <br /> 3 Laboratory report indicates gasoline C6-C12 <br /> 4 Laboratory report indicates unidentified hydrocarbons C10-C24 ' <br /> 5 Laboratory report indicates unidentified hydrocarbons C9-C24 <br /> 6 Laboratory report indicates unidentified hydrocarbons<C16 <br /> MTBE by EPA Method 8260 <br /> 8 Laboratory report indicates discrete peaks <br /> 9 Laboratory report indicates unidentified hydrocarbons>C16 ' <br /> 14 Laboratory report indicates hydrocarbon pattern present in the requested fuel quantitation range but does not resemble the pattern of the <br /> requested fuel <br /> '1 Laboratory report indicates gasoline <br /> 12 Laboratory report indicates Toluene did not confirm via GCMS I <br /> 13 Laboratory report indicates this sample was originally analyzed within holding time Re-analysis for confirmation or dilution was performed past the <br /> recommended holding time <br /> 14 MTBE b EPA Method 8260 was analyzed yzed outside recommended holding time <br /> 15 Due to laboratory error the TPH-D samples for MW-3 and MW-4 were composited The corresponding result lis reported as MW-3 <br /> 16 Analysis with silica gel cleanup <br /> I E i <br /> 9-863286855 90IM/02 <br />