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• 0 <br /> 310 PETROLEUM flONTAMINATED SOILS ESTIMATES FOR HYDROCNIIISDN VAPOR EMISSIONS 31R <br /> I000D concentrations shown in Figure 12b The emission rales from a 76 o nln (tit <br /> gat/min) treatment of gasoline-saturated groundwater (18 ppm benzene). and <br /> Qf <br /> 190"R=50 Rpm ---4o- .r groundwater containing a more realistic 1 ppm benzene,are predicted by Fuqua <br /> 1000 Q =?6 lin=20� lion 22 to be <br /> r1,SInp t <br /> Emissions C.s�=1965 gid Cy=2.41 X 10-7 g1cm3 <br /> Rate 100 U1 Ma,e*=109 gfd C.=1 33 x 10-6 glen' <br /> (gid) It has been assumed that the air flowrate into the stripper is 56601-1min (200 <br /> 3lmtn <br /> 10 ft , Q,.w/Q,=75) <br /> 1-1 l!t-Ig Emissions from Boded Gasatme-Cantsminated Solis <br /> = <br /> 1 -� Qf = t9 I/enui 5$gni Figure 13 presents benzene emission eslinlates for gasoline-contaminated soils <br /> left to-place as predicted by Equation 23 for the following conditions <br /> •1fT = 0 38 <br /> 01 1 1 10 100 9m = 0 a5 <br /> [�1 D„° = 7270cnl2/d <br /> � .soluble T = 20* + <br /> Influent Water Concentration (Ing/1) 'These Conservative estimates are for the situation in which relatively honiogene <br /> ous soils lie above the gasoline contaminated soil, and there is no low permcabi[- <br /> 1000 ity surface cover (i a paving, cla} liner) <br /> �i.soluble i,stnp <br /> 104 <br /> �l,undisturlxd Ilenzem(20C) <br /> 100 <br /> (g/cm2-d) pe=1.6 9/CM] <br /> 6m=005 gig <br /> to r,=038 <br /> .=72 r<0cin2ld <br /> 10- <br /> 10 x1 = 003 <br /> x, = 002 <br /> 1 x, =0.01 <br /> l 10 IOU 1000 10 ' <br /> Qstr)p/Q( 0 20 40 tail so Im <br /> Distance to Surface (tai) <br /> Figure 12 Air stripper emissions Ftgurs 13 Emissions eslimales for buried gasoline-contamnaled sods <br />