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MASS BALANCE ANALYSIS <br /> Operating Parameters: Liquid loading - 1.4 gpm (continuous) <br /> Vapor loading - 400 scfm <br /> Total Nonmethane Hydro-- <br /> carbon concentration - <0.001 ppm <br /> Assumptions: 1) 100 percent transfer of contaminants to vapor <br /> phase <br /> 2) Vapor influent is not contaminated <br /> Mass Balance Equation <br /> (Lin x Xin) + (Vin x Yin) _ (Lout x Xout) + (Vout x Yout) <br /> Where, <br /> L = Liquid Loading = 1.4 gpm <br /> X = Contaminant concentration, liquid phase = <0.001 mg/l <br /> V = Vapor Loading = 400 scfm <br /> Y = Contaminant Concentration, vapor phase <br /> and, <br /> Vin = Xout = a <br /> Simplifying then, <br /> Vout x Yout = Lin x Xin = Contaminant vapor discharge (lbs/day) <br /> Vout x Yout = <br /> (1.4 gal/min) (<0.o01 mg/1) 1 g__ x 3.7851 ;c 1 lb x 1440 min <br /> 1000 mg gal 453.5 gm day <br /> Vaut x Yout = <0.00002 lbs da <br /> Rearranging the mass balance equation and solving for the concentration <br /> of nonmethane hydrocarbons in the vapor discharge (Pout) . <br /> Yout = Lin x Ain = 1.4 gal/min x <0.001 ma/l <br /> o t 400 ft3/min x 7.48 gal/fr_' <br /> Yout = <0.0000004 mg/1 nonemethane hydrocarbons <br /> 71 7— <br /> GROUNDWATER <br />