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TAft 1 <br /> . Groundwater Monitorita and Analytical Results <br /> Chevron Service Station#9-1848 <br /> 1257 Yosemite Avenue <br /> Manteca,California <br /> EXPLANATIONS. <br /> Groundwater monitoring data and laboratory analytical results prior to May 18,2000,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 /> I Total Oil and Grease(TOG)was X5,000 ppb and TPH-Diesel(TPH-D)was detected at 70 ppb <br /> 2 Confirmation run <br /> 3 Laboratory report indicates gasoline C6-C 12 <br /> MTBE by EPA Method 8260 was analyzed outside the EPA recommended hoUng time <br /> 5 MTBE by EPA Method 8260 <br /> 6 BTEX and MTBE by EPA Method 8260 <br /> I <br /> 9-1848 xW386392 9 As of 07/18/02 <br />