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CAMBRIA <br /> Table 2 Mass Removal Data,Shell-branded Service Station, 2575 Country Club Boulevard,Stockton,California <br /> Abbreviations&Notes <br /> TPHg=Total purgeable hydrocarbons as gasoline <br /> MTBE=Methyl tertiary butyl ether <br /> ppb=Parts per billion equivalent to lig/L <br /> pg=Micrograms <br /> L=Liter <br /> gal=Gallon <br /> g=Gram <br /> Groundwater extracted by vacuum trucks provided by ECI Water disposed of at a Martinez refinery <br /> TPHg,benzene analyzed by EPA Method 8015/8020 or EPA Method 8260 <br /> MTBE analyzed by EPA Method 8260,except for those in italics,which were analyzed by EPA Method 8020 <br /> Mass removed(pounds)based on the formula volume(gal)x concentration(µgIL)x(gll(Pgg)x(pound/453 6g)x(3 785 Ugal) <br /> I <br /> Volume removed(gallons)based on the formula [mass(pounds)x 453 6(g/pound)x(gal/3 785L)x(U1o00cm3)]/density(g/cm�) <br /> Density inputs TPHg=0 73 glcm3,benzene=0 88 glcm3,MTBE=0 74 g/cm3 <br /> Bold font indicates new data since the last QMR was issued <br /> `Concentration based on most recent groundwater monitoring results for each constituent in well RW 1 A <br /> `A dedicated pump(installed Aug 2000)in well RW 1 A is now pumping groundwater into a Baker Tank,which is then emptied via vacuum truck <br /> I <br /> I <br /> I <br /> 0783 Page 5 of 5 <br />