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AMBRIA <br /> Abbreviations&Notes <br /> TPHg=Total purgeable hydrocarbons as gasoline <br /> MTBE=Methyl tett butyl ether <br /> Cone =Concentration <br /> ppb=Parts per billion equivalent toµg/L <br /> µg/L=Micrograms per liter <br /> L=Liter <br /> gpm=Gallons per minute <br /> gal=Gallon <br /> g=Gram <br /> Mass removed based on the formula volume extracted(gal)x Concentration(Itg/L)x(g/lObµg)x(pound/453 6g)x(3 785 Ugal) <br /> When constituents are not detected,the concentration is assumed to be equal to half the detection limit in subsequent calculations <br /> Volume removal data based on the formula mass(pounds)x(density)-1(cm3/g)x 453 6(g/pound)x(U1000 cm)x(gal/3 785 L) <br /> Density inputs TPHg=0 73 g/cm3 TPHd=0 87 glcmi,MTBE=0 74 glcm3 <br /> TPHg benzene and MTBE analyzed by EPA Method 8260B <br /> Page 2 of 2 <br /> 0783 <br />