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M <br /> Tab • - <br /> Groundwater Monitoring Da and Analytical Results <br /> Former Chevron Service Station#9-6258 _ <br /> 2409 East Main at F Street <br /> Stockton,Cahforrua <br /> EXPLANATIONS <br /> Groundwater monitoring data and laboratory analytical results prior to April 24,2000,were compiled from reports prepared by Blame Tech Services,Inc <br /> TOC=Top of Casing TPH-G=Total Petroleum Hydrocarbons as Gasoline MTBE=Methyl temary butyl ether <br /> (ft)=Feet B=Benzene (ppb)=Parts per billion <br /> GWE=Groundwater Elevation T=Toluene --=Not Measured/Not Analyzed <br /> (msl)=Mean sea level E=Ethylbenzene QA=Quality Assurance/Trip Blank <br /> DTW=Depth to Water X=Xylenes <br /> TOC elevation for MW-4 was survyed in June,2003,and referenced to City of Stockton benchmark 110,a cut square on the north curb return of Marsh and Filbert <br /> Streets(Benchmark Elevation=2190 ft) <br /> ' MTBE by EPA Method 8260 <br /> 2 BTEX and MTBE by EPA Method 8260 <br /> 3 Well development performed <br /> I <br /> 9-6258 xis/#386844 4 As of 10/31/03 <br />