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I <br /> CAMB RIA <br /> Table 1. Groundwater Extraction - System Analytical Results -Shell-branded Service Station - <br /> Incident#98995874, 341 East Main Street, Ripon, Califomia <br /> Sample Meter <br /> Date Reading TPHg Benzene MTBE TBA Ethanol <br /> (gallons) (Concentrations in b) <br /> 02/02/01 1,571,100 <50.0 <0.500 <0.500 <20.0 <100 <br /> 02/09/01 1,632,200 <50.0 <0.500 <2.50 --- --- <br /> 03/02/01 1,808,500 <50.0 <0.500 <2.50 --- --- <br /> 03/12/01 1,893,900 <50.0 <0.500 <0.500 --- --- <br /> 03/27/01 1,977,700 <50.0 <0.500 <0.500 --- --- <br /> Abbreviations&Notes: <br /> TPHg=Total petroleum hydrocarbons as gasoline,analyzed by EPA Method 8015 <br /> i <br /> Benzene analyzed by EPA Method 8020 or 8260. Results by 8260 reported in bold,when available <br /> MTBE=Methyl tertiary butyl ether,analyzed by EPA Method 8020 or 8260. Results by 8260 reported in bold,when available. <br /> TBA=Tertiary butyl alcohol,analyzed by EPA Method 8260 <br /> Ethanol by EPA Method 8260 <br /> ppb=Parts per billion <br /> <n=Below detection limit of n ppb <br /> Not available/not analyzed <br /> a=Laboratory also detected xylenes in the sample <br /> b=Laboratory also detected toluene in the sample <br /> g:lripon34lmain\gwesystem.xls Page 5 of 5 <br />