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I <br /> T 3 <br /> Joint Groundwater MonitormgData and Analytical Results <br /> Arco Service Station#4932 <br /> 16 East Harding Way <br /> Stockton,Califona <br /> EXPLANATIONS: <br /> Joint groundwater monitoring data and laboratory analytical results provided by Secor International,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 /> DTW=Depth to Water T=Toluene --=Not Measured/Not Analyzed <br /> GWE=Groundwater Elevation E=Ethylbenzene QGTB=Quality Control Trip Blank <br /> (msl)=Mean sea level X=Xylenes <br /> TOC elevations are referenced to msl TOC elevations were surveyed by Morrow Surveying,Inc in October,2000 The benchmark used for the survey <br /> was City of Stockton benchmark#24,a brass disc in monument well stamped 25-2,to traffic island at the northwest comer of Pacific Avenue and Harding Way, <br /> (Benchmark Elevation=10 33 ft) <br /> t <br /> Laboratory report indicates a hydrocarbon pattern is present in the <br /> requested fuel quantitation range but does not resemble the pattern of the requested fuel <br /> 2 MTBE by EPA Method 8260 <br /> I <br /> I <br /> I <br /> j 4409 zls/#I80238 13 As of 07/11/02 <br />