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MM M 1=1rllr lM M r r lifil� 0Benzene parameters i A [m2] 40 000 plan view of the source area b [m] 2000 aquifer thickness Cs [mgAgsoo] concentration of chemical'Y'sorbed to soil particle surfaces CT [mgAgsod total soil concentration(all phases)of chemical' ' C°r [mgJkgso,i] 13 000 total soil concentration (all phases) of chemical'T'at time t=O CT max [mgm,xture/kgsod] total soil concentration of a multi-component mixture Cv [mg,/Lair] vapor phase concentration of chemical'Y' in the sod matrix Ci [mgJkgso,i] immiscible(free-phase) concentration of'Y'in the source zone C°cs(LR,O,z, [dimensionless] steady-state normalized concentration distribution along the dissolved plume centedine «CR>z>t,max [mgJLH20] 12 000 time-averaged solute concentration at the receptor location DAF [dimensionless] dilution attenuation factor (chemical specific) Des [m2/yj 0 600 effective gas phase diffusion coefficient in sod matrix (chemical specific) foc [kgcaftn/kgso,i] 1 330 fraction of organic carbon in soil matrix H [m] 2000 source zone thickness[in] Hw [m] 2000 well screen interval (screen interval is assumed to extend from the water table downwards) [m] [M3/M2-dl 0 000 water flux through the source zone If [mld] 0000411 water infiltration rate through source zone 15 0 000411 Kd ((mgJkgso,i)/ sod/water partition coefficient(chemical specific) (mgJLH2o)] 0114 Kd,s 0 114 Kd,vz 0 114 KH [(mgJLa,r)1 Henrys law coefficient(chemical specific) (mgJLH20)] 0 220 Koc [(mgJkgso,i)/ organic carbon partition coefficient(chemical specific) (mgJLH20)] 57 000 KxY cm/sec 000020 Horizontal hydraulic conductivity KW 00001 00864 Kz cm/sec 008640 Vertical hydraulic conductivity cm/s m/d L [m] 10 000 length of the source zone parallel to groundwater flow direction Lc [m] 13 000 depth of sod cover overlaying the source zone Ld [m) 14 000 diffusion path length for volatile source zone losses= Lc+Y2H Lvz [m] 0 000 distance from the bottom of the source zone to the aquifer Ls [m] LR [m] 30 000 distance downgradient to receptor ML [Mg.] mass of compound in the source zone soil pore water(chemical specific) Ms [mg[] mass of compound sorbed onto source zone soil particles(chemical specific) My [mgr] mass of compound in the source zone vapor space(chemical specific) Mw [glmoles,] molecular weight of a single component in a mixture(chemical specific) Mw,avg [gm,xwrelmolesm,xture] 90 000 average molecular weight of the mixture(mixture specific) n [LvoidslLswl 0 440 total soil porosity Pv [atm] pure phase vapor pressure of compound (chemical specific) R [0 0821 L-atm/mole-K) 0 082 Universal Gas Constant S [mgJLH20) 1780 000 pure phase aqueous solubuty of chemical 'T'(chemical specific)