Laserfiche WebLink
i <br /> i <br /> 19 October 2012 <br /> AGE-NC Project No. 97-0312 <br /> Page 20 of 22 <br /> ethylbenzene and 1,200 tag/I total xylenes. The values reported calculate to nearly 7,200 <br /> ppmv for TPH-g, 65 ppmv benzene, 210 ppmv toluene, 99 ppmv ethylbenzene and 270 <br /> ppmv xylene. <br /> Additionally, TPH-d was initially detected at 640 mg/m3 and 6,300 mg/m3 (ppb) near the <br /> end of the pilot test period. <br /> t..: <br /> 7.5. MASS CALCULATION OF RECOVERED PRODUCTS <br /> The hydrocarbon mass removed during the HVSVE pilot test operating period was <br /> calculated using the equation: <br /> M = C•Q•t <br /> where: M = cumulative mass recovered (kg) <br /> C = vapor concentration (kg/m3) <br /> r Q = extraction flow rate (m3/hr) <br /> L� t = operational period, in hours <br /> r In February 2011, a HVSVE pilot test was operational for over 90. hours. The average <br /> Lr analytical results for gasoline and.diesel (16;340 lag/I and 1,578 mg/rn3)of the HVSVE soil <br /> vapor samples, average flow rates (approximately 75 cfm) and the operational period <br /> (92.8 hours)were used to calculate the approximate mass of extracted gasoline and diesel <br /> during this period. <br /> During the extended operational period, the combined mass of hydrocarbons extracted by <br /> SVE operations was calculated to be approximately 410 lbs of gasoline or equivalent to a <br /> volume of approximately 65 gallons of gasoline and the mass of hydrocarbons extracted <br /> by SVE operations was calculated to be approximately 39.6 lbs of diesel or equivalent to <br /> a volume of,approximately 6.5 gallons of diesel fuel. <br /> Operational values of the HVSVE pilot (extended operational period) are presented with <br /> all soil vapor analytical date in Appendix C. <br /> I <br /> L <br /> Advanced GeoEnvironmental,Inc. j <br /> I <br /> I <br />