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V M � 4ft am <br /> Table 7 <br /> Effective Diffusion Coefficients, Leaching Factor, and Soil Saturations Concentrations For RBCA Evaluation <br /> Equations Used to Calculate Values <br /> LFgw subsurface sod to groundwater leaching factor, units = (mglL water)1(mglkg-soil) <br /> LFgw =( Urho s)!((theta ws + (ks"rho-s) + (H " theta-as)I'[(1 + ((U-gw " delta gw)1(I"W)1) } " 10 cm"3-kg/L-g <br /> Ds-eft Effective diffusion coefficient in sod based on vapor-phase concentration, units = cm"21s <br /> Ds eff = (Dair *(theta-ws"3 33/theta 1"2))+(Dwat"(11H)*(theta ws"3 33/theta t"2)1 <br /> Dcrack-eff Effective diffusion coefficient through foundation cracks, units = cm"2/s <br /> Dcrack eff = (Dau"(theta-acrack"3 33/theta t"2))+(Dwat"(1/H)'(theta arrack"3 33/theta-t'2) <br /> Dcap eff Effective dffsuion coefficient through capillary fringe, units = cm"21s <br /> Dcap eff = (Dair"(theta acap"3 331theta-t"2)1+(Dwat"(11H)`(theta wcap"3 33/theta-t'2) <br /> Dws off Effective diffusion coeffcient between ground water and soil surface units = cm"21s <br /> Dws-eff = (hcap + hv)/((heap/Dcap-eff) + (hv1Ds-eff)) <br /> Csat Soil Concentration at which Dissolved Pore Water and Vapor Phases Become Saturated, units mglkg sod <br /> Cs sat = (Slrho-s)•(H'theta-as + theta ws + k-s"rho-s)'10 L-glcm"3-kg <br /> See Physical &Chemical Properties and Site Properties Tables for Definitions of the Symbols & Units for factors in equations <br /> I <br /> 1 <br /> x lmarkslSAFEWAY2 XLW Page 1 of 2 2126196 7 50 AM <br />