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CAMBRIA <br /> Table 1 Mass Removal Data,Shell-branded Service Station,3725 Tracy Boulevard,Tracy,California <br /> Notal Gallons Extracted: 161,069 Total Pounds Removed: 5,:43 1M 0 102 ,j 51.2 <br /> Total Gallons Removed 0.891 0 8.29 <br /> Abbreviations&Notes <br /> TPHg=Total purgeable hydrocarbons as gasoline <br /> MTBE=Methyl tertiary bury]ether <br /> ppb=Parts per billion equivalent toµg/L <br /> µg=Micrograms <br /> L=!.iter <br /> gal=Gallon <br /> g=Gram <br /> Groundwater extracted by vacuum trucks provided by ACTI through December 2001 Phillips Services as of January 2002 Water disposed of at a Martinez refinery <br /> TPHg and benzene analyzed by EPA Method 8015/8020 <br /> MTBE analyzed by EPA Method 8260,results by EPA Method 8020 shown in italics <br /> When constituents are not detected,the concentration is assumed to be equal to half the detection limit in subsequent calculations <br /> Mass removed(pounds)based on the formula volume gal)x concentration(µg/L)x(g/l(Ppg)x(pound/453 6g)x(3 785 USA) <br /> Volume removed(gallons)based on the formula [mass(pounds)x 453 6(g/pound)x(gaV3 785L)x(L/1000crn')]/densrry(glcm') <br /> Density inputs TPHg=0 73 glcm',benzene=0 88 glcm' MTBE=0 74 glcm' <br /> I Concentrations based on most recent groundwater monitoring results for each hydrocarbon constituent <br /> 2 Began performing vacuum purging with a double diaphragm pump since there was carbon filter breakthrough during the 11/1/01 event <br /> 'MW-IA did not produce much water on May 6,2001(may have been vapor-locked) so the total amount was taken from BE-1 <br /> 0813 Page 3 of 3 <br />