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Ta <br /> Groundwater MonitoringLand 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 B=Benzene TOG=Total Oil&Grease <br /> (ft)=Feet T=Toluene (ppb)=Parts per billion <br /> DTW=Depth to Water E=Ethylbenzene NP=No Purge <br /> GWE=Groundwater Elevation X=Xylenes =Not Measured/Not Analyzed <br /> (msl)=Mean sea level MTBE=Methyl tertiary butyl ether <br /> TPH-G=Total Petroleum Hydrocarbons as Gasoline <br /> TPH-D=Total Petroleum Hydrocarbons as Diesel <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 /> 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 /> z EPA Method 5520 <br /> i Laboratory report indicates gasoline C6-C12 <br /> 4 Laboratory report indicates unidentified hydrocarbons C10-C24 <br /> ` Laboratory report indicates unidentified hydrocarbons C9-C24 <br /> 6 Laboratory report indicates unidentified hydrocarbons<C16 <br /> EPA Method 8260 <br /> 8 Laboratory report indicates discrete peaks <br /> 4 Laboratory report indicates unidentified hydrocarbons>CI6 <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 /> 12 Laboratory report indicates Toluene did not confirm via GCMS <br /> 11 Laboratory report indicates this sample was originally analyzed within holding time Re-analysis for confirmation or dilution was performed past the recommended holding time <br /> 14 MTBE by EPA Method 9260 was analyzed outside recommended holding time <br /> I <br /> 9 8612 xlc/#386855 6 As of 05/25/01 <br />