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=ATE AND TRANSPORT MODEL OUTPUT FOR: Xylenes <br /> rt of model output for- <br /> latilization from groundwater to outdoor air <br /> --------------------------------------- <br /> VAPOR TRANSPORT FROM GROUNDWATER TO OUTDOOR AIR <br /> ------------......---------------- ---- <br /> Effective Diffusion Coefficient for Lens <br /> Total thickness of subunit [cm]............... 6.00E+02 <br /> ' Air-filled porosity [-]....................... 0.10 <br /> Water-filled porosity [-]..................... 0.15 <br /> Total porosity [-]............................ 0.25 <br /> Effective diff. coeff, for subunit....[cm"2!s] 5.36E-04 <br /> Effective Diffusion Coefficient for Capillary Fringe <br /> -------------------- ---------------- <br /> Total thickness of subunit [cm]............... 50. <br /> Air-filled porosity [-I....................... 5.00E-03 <br /> Water-filled porosity [-]..................... 0.24 <br /> Potal porosity [-]............................ 0.25 <br /> ffective diff. coeff, for subunit....[cm"21s] 4.34E-06 <br /> Overall Effective Diffusion Coefficient (for all layers) <br /> Overall diffusion path length [cm]................. 4.87E+02 <br /> ' (Equals the sum of the vadose zone, lens, and capillary fringe) <br /> Overall effective diffusion coefficient [cm"21s]... 3.95E-05 <br /> Vapor Concentration and Flux at Source <br /> Initial vapor conc. at source [glcm"3]............. 1.05E-07 <br /> Initial vapor conc. at source [mglm"3]............. 1,05E*02 <br /> Initial vapor flux rate [glcm"21s]................. 8.53E-15 <br /> Soil gas flow rate is zero (advection not considered in this model). <br /> OUTDOOR AIR CONCENTRATION <br /> Xylenes <br /> ' Concentration <br /> Time Outdoors <br /> (yr) (mglm"3) <br /> - <br /> 1.0 2.13E-07 <br /> This is a steady-state model. <br /> 1 <br />