Laserfiche WebLink
PRG EQUATIONS <br /> Soil Equations: For soils, equations were based on three exposure routes (ingestion, skin contact, and <br /> inhalation). <br /> Equation 44: Combined Exposures to Carcinogenic Contaminants in Residential Soil <br /> TR x AT, <br /> C(mg/kg) r [( IFS x CSF SFSadi x ABS x CSF InbFtlf x CSFt) <br /> EF edi o) ( o) + ( a ) <br /> 10`mg/kg 10`mg/kg VF: <br /> Equation 4-2: Combined Exposures to Noncarcinogenic Contaminants in Residential Soil <br /> THO x BW_ x AT, <br /> C(mg/kg) z 1 X IRS, ) « ( 1 X SA, x AF x ABS) } ( 1 X IRAs) ) <br /> EF, X ED, [ ( RfD- 10`mg/kg RfD, 10`mg/kg RfD! VF. <br /> Equation 4-3: Combined Exposures to Carcinogenic Contaminants in Industrial Soil <br /> I, TR X BW. x AT, <br /> C(mg/kg) IRS, X CSF,) + ( 'a X AF X ABS X CSF-) + ( IRAs X CSF,)) <br /> EF, x ED- [ ( 101mg1kg 10`mg/kg VF; <br /> Equation 4-4: Combined Exposures to Noncarcinogenic Contaminants in Industrial Soil <br /> THp x BW. x AT, <br /> C(mg/kg) a 1 X IRS- ) + ( 1 X SA, X AF x ABS) « ( 1 X IRAs)) <br /> EF- x ED, RfDo 101m9,1kg RfD, 101m9,jkg RfD, VY., <br /> Footnote: <br /> 'Use VF,for volatile chemicals(defined as having a Henry's Law Constant(atm�'/moll greater than 10"and a molecular weight less Ina <br /> 20o gmmsrmot)or PEF for non-volatile chemicals. <br /> 17 <br />