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5 <br /> CALCULATIONS <br /> Beacon Station No 695 <br /> 900 South Cherokee Lane <br /> Lodi, California <br /> Purpose. <br /> To provide example calculations of total petroleum hydrocarbon (TPH) as gasoline extracted from the soil and emitted to <br /> the atmosphere by the soil vapor extraction system Also, to provide system hydrocarbon abatement efficiency <br /> Assumptions- <br /> e Assume reported analytical results for TPH as gasoline remain constant throughout interval of system operation <br /> Method <br /> 1) Extraction <br /> TPH <br /> TPHr = A) [1 10] (LBMOLE) <br /> 387-FV L�LBMOLE� (1440 <br /> DAY) <br /> Where TPH, is mass flow rate of TPH as gasoline in lbs/day extracted from soil <br /> Q, is the inlet soil vapor process stream flow rate in standard cubic feet per mmute (scfm) <br /> [TPH], is the inlet concentration of TPH as gasoline in ppmv prior to the control device <br /> 2) Emission <br /> TPH _ to E�H1x10� LBMOLE 387FT i LBMOLE� 1440 MIN DAY <br /> Where TPH. is mass flow rate of TPH as gasoline in lbs/day emitted to the atmosphere <br /> Q. is the effluent soil vapor discharge rate in scfm <br /> [TPHJ is the effluent concentration of TPH as gasoline in ppmv <br /> 3) System Hydrocarbon Abatement Efficiency <br /> % Abatement = TPH, <br /> TPH, <br /> - TPH x 100 <br /> LRP162 CAC <br />