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Groundwater MomtoriTnata and Analytical Results <br /> i <br /> Chevron Service Station#9-3232 <br /> 8660 Lower Sacramento Road <br /> Stockton,California <br /> Groundwater monitoring data and laboratory analytical results prior to June 22,2000,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 /> (msl)=Mean sea level E=Ethylbenzene QA=Quality Assurance <br /> DTW=Depth to Water X=Xylenes <br /> * TOC elevations were surveyed in Apnl of 2001 by Morrow Surveying Elevations are based on San Joaquin County Benchmark No 1N-6 Brass disk <br /> in well at Thorton and Davis Roads (Elevation= 14 43 feet) <br /> I TOC elevation changed due to well head maintenance <br /> 2 MTBE by EPA Method 8260 <br /> 3 Laboratory report indicates gasoline C6-C 12 <br /> Laboratory report indicates unidentified hydrocarbons C6-C12 <br /> 5 TOC has been altered <br /> 9-3232 xis/#386463 4 As of 01/23/02 <br />