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APPENDIX C <br /> VOLUME-MASS CALCULATIONS OF EXTRACTED GASOLINE HYDROCARBONS <br /> CHEROKEE TRUCK STOP <br /> 3535 East Cherokee Road, Stockton,California <br /> Assumptions: <br /> • Utilizing High Vacuum SVE pilot test analytical data collected from soil vapor <br /> samples (Table 2) and from field measurements collected during the pilot test <br /> (Table 1), the volume and mass of extracted gasoline hydrocarbons at the site can <br /> be approximated. <br /> The hydrocarbon volume-mass removed during the operating period can be calculated <br /> using the following equation: <br /> M = C • Q • t <br /> where: M = cumulative mass recovered (kg). <br /> C = vapor concentration (kg/m3) <br /> Q = extraction flow rate (m3/hr) <br /> t = operational period (hrs) <br /> The average InfluentTPH-g concentration and average flow rates during each time interval <br /> were utilized for calculating the approximate mass/volume of extracted gasoline <br /> hydrocarbons. <br /> 14 to 19 February 2011 <br /> The average analytical TPH-g concentration for this time interval was determined to be <br /> 26,000 pg/l, 21,000 pg/I, 12,000 pg/I, 7,700 pg/I and 15,000 pg/I / 5 = 16,340 pg/1) <br /> The average analytical TPH-d concentration for this time interval was determined to be <br /> 640 mg/m3, 520 mg/m3, 280 mg/m3, 150 mg/m3 and 6300 mg/m3/5 = 1,578 mg/m3) <br /> The average flow rate was calculated at 72.3 cubic feet per minute; the operational period <br /> was equal to 92.8 hours of running time. <br /> i <br /> C = TPH-g 16,340 pg/I =0.01634 kg/m3 TPH-d 1,578 mg/m3 =0.001578 kg/m3 <br /> Q = 72.5 ft3/min <br /> t = 92.8 hours <br /> Converting Q to m3/hour yields: <br /> Q = (72 ft3/min) •(60 min/hour) •(0.0283168m3/ft3)= 122.8 m3/hour <br /> Mgas = C • Q • t = (0.01634 kg/M3) •(122.8 M3/hour) • (92.8 hours) = 186.2 kg of gasoline <br /> Mdiesel =C • Q • t= (0.001578 kg/m3) •(122.8 M3/hour) • (92.8 hours) = 17.98 kg of diesel <br /> Converting kg of gasoline to pounds of gasoline yields: <br /> 186.2 kg of gas • 2.2046 lbs./kg = 410 lbs of gasoline <br /> • Converting pounds of gasoline to gallons of gasoline yields: 410 lbs. of gas • 0.16 <br /> gal of gas/lbs. of gas = 65.68 gallons of gasoline <br /> Converting kg of diesel to pounds of gasoline yields: 17.98 kg of diesel• 2.2046 lbs./kg = <br /> 39.63 lbs of diesel or 6.5 gallons of diesel. M <br /> 65.68 gallons of gasoline/92.8 hours = 0.7 gallons .per hour <br /> : <br /> i <br /> i <br />