Laserfiche WebLink
i p <br /> APPENDIX C <br /> VOLUME-MASS CALCULATIONS OF EXTRACTED GASOLINE HYDROCARBONS <br /> RIVER CITY PETROLEUM - CONNELL MOTOR LIFT TRUCK <br /> Assumptions <br /> • Utilizing field measurements collected during the SVE remediation(Table 1)and analytical <br /> data collected from air samples (Table 2 ), the volume of extracted gasoline hydrocarbons <br /> at the site can be approximated <br /> I <br /> I <br /> The hydrocarbon mass removed during the operating period can be calculated using the following <br /> equation <br /> i <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 inlet TPH-g concentration and average inlet flow rates during each time interval were <br /> utilized for calculating the approximate mass/volume of extracted gasoline hydrocarbons <br /> • <br /> 12 September 2005 to 10 October 2005 <br /> 1) The average analytical TPH-g concentration for this time interval was determined to be 525 µg/1([9/12/05+ <br /> 10/10105]—2= [730+320]—2=525 µg/1) The average flow rate was calculated at 275 cubic feet per minute <br /> (nomograph) The operational period was 672 hours,running time was reduced due to limited operational times <br /> (Table 1) <br /> C =525 ug/l=0 000525 kg/m3 <br /> Q =275 ft'/mm <br /> t =672 hours <br /> Converting Q to m3/hour yields <br /> Q=(275 ft3/mm)•(60 min/hour)• (0 0283168m'ffie)=464 75 m3/hour <br /> M=C • Q•t=(0 000525 kg/m3) • (464 75 m3/hour)• (672 hours)= 164 kg of gasoline <br /> Converting kg of gasoline to pounds of gasoline yields <br /> 164 kg of gas• 2 2046 lbs/kg=361 5 lbs of gasoline <br /> Converting pounds of gasoline to gallons of gasoline yields <br /> 361 5 lbs of gas • 0 16 gal of gas/lbs of gas ;z 57 8 gallons of gasoline <br /> Advanced CeoEnvironmental,Inc <br />