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� Groundwater Monitoring ,m and Analytical Results <br /> Chevron Service Station#9-3232 <br /> 8660 Lower Sacramento Road <br /> Stockton,California <br /> EXPLANATIONS; <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 B=Benzene (ppb)(pp )=Parts per billion <br /> (ft.)=Feet T=Toluene =Not Measured/Not Analyzed <br /> GWE=Groundwater Elevation E=Ethylbenzene <br /> (msl)=Mean sea level X=Xylenes <br /> DTW=Depth to Water MTBE=Methyl tertiary butyl ether <br /> TPH-G=Total Petroleum Hydrocarbons as Gasoline <br /> * TOC elevations were surveyed in April of 2001 by Morrow Surveying. Elevations are based on San Joaquin County Benchmark No. 1 N-6. Brass disk <br /> in well at Thorton and Davis Roads. (Elevation= 14.43 feet). <br /> TOC elevation changed due to well head maintenance. <br /> Z MTBE by EPA Method 8260. <br /> Laboratory report indicates gasoline C6-C12. <br /> Laboratory report indicates unidentified hydrocarbons C6-C12. <br /> 5 TOC has been altered. <br /> 9-3232.xis/#386463 3 As of 07/18/01 <br />