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T1 <br /> Groundwater Monitonna and Analytical Results - <br /> Tosco(Circle K)Unit#08671 <br /> 8606 Thornton Road <br /> Stockton,California <br /> EXPLANATIONS- <br /> Groundwater monitoring data and laboratory analytical results prior to May 14, 1999,were compiled from reports prepared by Secor International,Inc <br /> TOC=Top of Casing TPH-G=Total Petroleum Hydrocarbons as Gasoline (ppb)=Parts per billion <br /> (ft)=Feet B=Benzene --=Not Measured/Not Analyzed <br /> DTW=Depth to Water T=Toluene ND = Not Detected <br /> S I =Screen Interval E=Ethylbenzene QA=Quality Assurance <br /> (ft bgs)=Feet Below Ground Surface X=Xylenes <br /> GWE=Groundwater Elevation MTBE=Methyl tertiary butyl ether <br /> (msl)=Mean sea level <br /> * TOC elevations are based on City of Stockton Benchmark#8 A brass disk in monument box marking the east 114 comer of section 8 Township to North range 6 East <br /> I MTBE by EPA Method 8260 <br /> 2 Laboratory report indicates gasoline C6-C12 <br /> 3 Laboratory report indicates unidentified hydrocarbons C6-C12 <br /> 4 Data provided by Secor International,Inc <br /> S TPH-G and BTEX by EPA Method 8260 <br /> 6 TPH-G,BTEX and MTBE by EPA Method 8260 <br /> 7 Laboratory report indicates a hydrocarbon pattern is present in the requested fuel quantitation range but does not resemble the pattern of the requested fuel <br /> 08671 xlsl#180198 5 As of 08/07/02 <br />