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Ta 1 <br /> Groundwater Monitorin*a and Analytical Results . <br /> Former Chevron Service Station#9-8632 <br /> 575 Grant Line Road <br /> Tracy,California <br /> EXPLANATIONS- <br /> Groundwater monitoring 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 (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 <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-12 Inc,holding <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 /> I Chromatogram pattern indicates an unidentified hydrocarbon <br /> 2 EPA Method 5520 <br /> 3 Laboratory report indicates gasoline C6-C12 <br /> Laboratory report indicates unidentified hydrocarbons C14-C24 <br /> 5 Laboratory report indicates unidentified hydrocarbons C9-C24 <br /> 6 Laboratory report indicates unidentified hydrocarbons<C16 <br /> 7 MTBE by EPA Method 8260 <br /> a Laboratory report indicates discrete peaks <br /> 9 Laboratory report indicates unidentified hydrocarbons>C16 <br /> 10 Laboratory report indicates hydrocarbon pattern present in the requested fuel quantitation range but does not resemble the pattern of the <br /> requested fuel <br /> I i Laboratory report indicates gasoline <br /> iZ Laboratory report indicates Toluene did not confirm via GCMS <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 by EPA Method 8260 was analyzed outside recommended holding time <br /> f5 Due to laboratory error the TPH-D samples for Mw-3 and MW4 were composited The corresponding result is reported as MW-3 <br /> 9-8632 xis/#386855 7 As of 10/30/01 <br />