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Tabl <br /> Groundwater Monitoring K) <br /> Analytical Results . <br /> Tosco(Circle K) nit#08671 <br /> 8606 Thornton Road <br /> Stockton, California <br /> EXPLANATIONS <br /> Groundwater morntonng data and Iaboratory 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/Tnp Blank <br /> (ft bgs)=Feet Below Ground Surface X=Xylenes <br /> GWE=Groundwater Elevation MTBE=Methyl tertiary butyl ether <br /> (iusl)=Mean sea level <br /> TOC elevations are based on City of Stockton Benchmark#8 A brass disk in monument box marking the east 1/4 corner of section 8 Township to North range 6 East <br /> 1 MTBE by EPA Method 8260 <br /> 2 Laboratory report indicates gasoline C6-C 12 <br /> 3 Laboratory report indicates unidentified hydrocarbons C6-C12 <br /> 4 Data provided by Secor International,Inc <br /> 5 TPH-G and BTEX by EPA Method 8260 <br /> 5 TPH-G,BTEX and MTBE by EPA Method 8260 <br /> 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 /> i <br /> I <br /> i <br /> I <br /> 08671 x1s1#180198 1 As of 05/14/03 <br />