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16 m16 "& "'iii "i 16 & I& " IFm "i "'iii 1& 09P "16 <br /> Table 7 <br /> Effective Diffusion Coefficients, Leaching Factor, and Soil Saturations Concentrations For RBCA Evaluation <br /> i <br /> Equations Used to Calculate Values <br /> LFgw subsurface sod to groundwater leaching factor, units = (mg/L.water)I(mglkg-sad) <br /> LFgw ={ I(rho-s)1((theta-ws + Iks"rho s) + (H ` theta as)]"I(1 + ((U gw " delta-gw)I(I"W))] ) " 10 cm'3-kg/L g <br /> Ds-eff Effective diffusion coefficient in sod based on vapor phase concentration, units = cm'21s <br /> Ds eff = IDair `(theta ws"3 33ltheta-t'2))+(Dwat"(11H)"(theta ws"3 33/theta t'2)) <br /> Dcrack-eff Effective diffusion coefficient through foundation cracks, units = em"21 s <br /> Dcrack eff = (Dair"(theta scrack'3 33ltheta-t'21)+(Dwat`I11H)"(theta acrack"3 33/theta-t'2) <br /> Dcap eff Effective diffsuion coefficient through capillary fringe, units = cm'21s <br /> Dcap-eff = (Dair'(theta-acap"3 33ltheta-t'2))+(Dwat•l11H)"11heta wcap'3 33/theta-t^2) <br /> Dws eff Effective diffusion coeffcient between ground water and soil surface, units = cm'21s <br /> Dws-eff = (hcap + hv)1((hcap/Dcap eff) + (hv/Ds eff)) <br /> Csat Soil Concentration at which Dissolved Pore Water and Vapor Phases Become Saturated, units mg/kg-sod <br /> Cs-sat = (S/rho-s)"(H"theta as + theta-ws + k-s"rho 5)'10 L g/cm'3-kg <br /> See Physical &Chemical Properties and Site Properties Tables for Definitions of the Symbols & Units for factors in equations <br /> x Imarks%SAFEWAY2 XLW Page 1 of 2 2/28198 7 50 AM <br />