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SOIL SATURATION CONCENTRATION (sat) <br /> Equation 4-10: Derivation of the Soil Saturation Limit <br /> sat a 12 (KaPn ' A„ ` H�9.) <br /> Pb <br /> Parameter Pefinition (units) Default <br /> sat Soil saturation concentration (mg/kg) — <br /> S Solubility in water (mg/L-water) Chemical-specific <br /> Pb Dry soil bulk density (kg/L) 1.5 <br /> n Total soil porosity (L,,,./L.,,,) 0.43 or 1 - (p,/pj <br /> P. Soil particle density (kg/L) 2.65 <br /> Ka Soil-water partition coefficient (L-/kg) K„x I. (chemical-specific) <br /> k. Soil organic carbontwater partition coefficient (Ukg) Chemical-specific <br /> f„ Fraction organic carbon content of soil (g/g) 0.006 or site-specific <br /> 6� Water-filled soil porosity (L,,.IL,,) 0.15 <br /> p, Air filled soil porosity (L.,/L ,J 0.28 or n-Ow <br /> W Average soil moisture content 0.1 <br /> (kgw.,.Ag.a or L,..,,`rkg. ) <br /> H Henry's Law constant (atm-rn'lmol) Chemical-specific <br /> H' Dimensionless Henry's Law constant H x 41, where 41 Is a units <br /> conversion factor <br /> 20 <br />