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CAMBRIA <br /> Table 2. Groundwater Extraction - System Analytical Results -Shell-branded Service Station - <br /> Incident#98995874, 341 East Main Street, Ripon, California <br /> Sample Meter <br /> Date Reading TPHg Benzene MTBE TBA Ethanol <br /> (gallons) 4 (Concentrations in b) <br /> 09/29/00 566,300 <50.0 <0.500 <0.500 <20.0 <100 <br /> 10/04/00 581,500 <50.0 <0.500 <0.500 <20.0 <100 <br /> 10/13/00 608,200 <50.0 <2.00 <2.00 <100 --- <br /> 10/20/00 640,900 <50.0 0.522 <0.500 <20.0 <100 <br /> 1'0/27/00-688;000 <50-0 <C500 <0.500 <20.0 <100 <br /> 11/03/00 741,600 <50.0 <0.500 <0.500 <20.0 <100 <br /> 11/10/00 801,100 <50.0 <0.500 <0.500 <20.0 <100 <br /> 11/17/00 863,600 <50.0 <0.500 <0.500 <20.0 <100 <br /> 11/22/00 908,600 <50.0 <0.500 <0.500 <20.0 <100 <br /> 12/01/00 992,500 <50.0 <0.500 <0.500 <20.0 <100 <br /> 12/08/00 1,057,400 <50.0 <0.500 <0.500 <20.0 <100 <br /> 12/13/00 1,103,700 <50.0 <0.500 <0.500 <20.0 <100 <br /> 12/20/00 1,168,900 <50.0 <0.500 <0.500 <20.0 <100 <br /> 12/28/00 1,240,300 <50 <0.50 <0.50 <20 <500 <br /> Abbreviations&Notes- <br /> TPHg=Total petroleum hydrocarbons as gasoline,analyzed by EPA Method 80I5 <br /> Benzene analyzed by EPA Method 8020 or 8260. Results by 8260 reported,when available <br /> MTBE=Methyl tertiary butyl ether,analyzed by EPA Method 8020 or 8260. Results by 8260 reported,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 /> g:lripon341mainlgwesystern.xls Page 4 of 4 <br />