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Ta <br /> Groundwater Monitormgand Analytical Results <br /> Former Chevron Service Station#E9-6258 <br /> r <br /> 2409 East Main at F Street <br /> Stockton,California <br /> EXPLANATIONS <br /> Groundwater monitoring data and laboratory analytical results prior to April 24,2000,were compiled from reports prepared by Blaine Tech Services,Inc <br /> TOC=Top of Casing TPH-G—Total Petroleum Hydrocarbons as Gasoline MTBE=Methyl tertiary butyl ether <br /> (ft)=Feet B=Benzene (ppb)=Parts per billion <br /> GWE=Groundwater Elevation T=Toluene --—Not Measured/Not Analyzed <br /> (ms])=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=21 90 ft) <br /> ' MTBE by EPA Method 8260 <br /> BTEX and MTBE by EPA Method 8260 <br /> 3 Well development performed <br /> 9 6258 xis/#386844 5 As of 01/21/04 <br />