Laserfiche WebLink
TABLE 19 <br /> CALCULATION OF EMISSION RATE FOR VOCs IN SOILS <br /> US CAN-WELTY ROAD <br /> 35275 Welty Road <br /> Vernalis,California <br /> Ci Kd Di He Ei S Oat <br /> COPC Cs(m /k ) m /k ) (cm3fg} (cm'lsec) (atm-m3/mole} HcIKd KdEHc (Mg/sec (m IL-water) mg/kg) <br /> BTEX <br /> Benzene 0.0050 5.0E-09 2.9 0.09 5.50E-03 1.9E-03 2.1E-02 1.6E-06 1,790.00 2,581.83 <br /> Toluene 0.033 3.3E-08 4.7 0.078 6.60-03 1.4E-03 1.8E-02 7.3E-06 526 2,441.14 <br /> Eth lbenzene 3.3 3.3E-06 8.9 0.068 7.88E-03 8.8E-04 1.3E-02 4.3E-04 169 851.09 <br /> Total Xylenes 9.5 9.5E-06 7.7 0.085 5.18E-03 6.8E-04 8.0E-03 1.1E-03 106 988.11 <br /> PAHs <br /> Acenaphthene 0.00067 6.7E-10 100.5 0.051 1.84E-04 1.8E-06 5.5E+05 4.6E-08 3.9 357.38 <br /> Anthracene 0.11 1.1E-07 327 0.039 5.56E-05 1.7E-07 5.9E+06 2.013-06 0.0434 20.15 <br /> Benzo(a)anthracene 0.0061 6.1E-09 NA NA NA NA NA NA NA NA <br /> Benzo(a)pyrene 0.0063 6.3E-09 NA NA NA NA NA NA NA NA <br /> ik Benzo b fluoranthene 0.013 1.3E-08 NA NA NA NA NA NA NA NA <br /> i <br /> Benzo ,h,i c lene 0.0018 1.8E-09 NA NA NA NA NA NA NA N <br /> Benzo k t7uoranthene 0.00067 6.7E-10 NA NA NA NA NA NA NA NA <br /> Chrysene 0.44 4.4E-07 NA NA NA NA NA NA NA NA <br /> Dibenz a,h anthracene 0.00067 6.7E-10 NA NA NA NA NA NA NA NA <br /> Fluoranthene 0.65 6.5E-07 NA NA NA NA NA NA NA NA <br /> Fluorene 0.6 6.1E-07 183.2 0.044 9.62E-05 5.3E-07 19E+06 2.1E-05 1.69 300.39 <br /> lndeno 1,2,3-c,d ene 0.00067 6.7E-10 NA NA NA NA NA NA NA NA <br /> Naphthalene 3.6 3.6E-06 30.9 0.060 4.40E-04 1.4E-05 7.0E+04 7.5E-04 31 819.88 <br /> Phenanthrene 2.3 2.3E-06 NA NA NA NA NA NA NA NA <br /> I <br /> Pyrene 0.067 6.7448]_ NA NA NA NA NA NA NA NA <br /> 1 <br /> Equation: <br /> 7.6 X 103XDiX LOXC1 <br /> d <br /> E! <br /> 0.023 <br /> Dix <br /> l 0.284 + 0.046 X K" <br /> H� <br /> r <br /> Where: <br /> Ei=average emission rate of contaminant i over the residential lot during the exposure interval,mg/sec <br /> Ci=bulk soil concentration of contaminant i;(chemical concentration in soil,mg/kg,x[10-6 kg/mg]) <br /> E <br /> Di=diffusivity in air for compound i,cmz/sec <br /> He=Henry's Law constant,atm-m3/mole <br /> Kd=soil/water partition coefficient,cm3/g <br /> Abbreviations: Equation Sourcc: <br /> atm-m'/mole=Atmosphere per cubic meter per mole Ei-PEA Manual,Figure 2.6. <br /> cm2/sec=Square centimeter per second Csat-PEA Manual Equation 2.5(as modified per Item 3 of the Errata Sheet) <br /> em'/g-Cubic centimeter per gram Parameter values from Regional Screening Level(RSL)Chemical-specific Parameters Supporting Table,May 2010 <br /> COPC=Constituent of potential concern <br /> Cs-Concentration in soil,mg/kg <br /> € mg/kg=Milligram per kilogram <br /> l mg/sec=Milligram per second <br /> NA=Not applicable because chemical is considered non-volatile(PEA Manual) <br /> PAHs=Polynuclear aromatic hydrocarbons <br /> PEA-Preliminary Endangerment Assessment <br /> VOCs=Volatile organic compounds <br /> SAINC <br /> Page l of 1 <br />