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' TPN C8-10 <br /> FATE AND TRANSPORT MODEL OUTPUT FOR TPH Aliphatic C8-10 <br /> 1 <br /> art Of VADOSE ZONE MODEL OUTPUT <br /> ' --- EffectiveDiffusioncoefficientforvadosezone <br /> ------------------------------------------------ <br /> Total thickness of subunit [cm] 1 60E+02 <br /> ' Air-filled porosity [- _ 9 22E-02 <br /> water-filled porosity }-] 0 25 <br /> Total porosity [-] <br /> Effective diff coeff for subunit [cmA2/s] 5 67E-04 <br /> ' Effective Diffusion coefficient for Lens <br /> ------------------------------------------------ <br /> Total thickness of subunit [cm] 1 80E+02 <br /> Air-filled porosity [-] 3 84E-02 <br /> water-filled porosity [-] 0 36 <br /> Total porosity [-1 0 40 <br /> Effective diff coeff for subunit [CMA2/s] 1 20E-05 <br /> Overall Effective Diffusion Coefficient <br /> - <br /> Overall diffusion path length [m 3 8 <br /> overall effective diffusion coefficient [cmA2/s] 2 22E-05 <br /> overall effective diffusion coefficient mA2/d1 1 92E-04 <br /> Data Summary and Initial Calculations <br /> ' --Unsaturated Zone <br /> ---------------------------------------- <br /> Distance from ground surface to source 1 5 m <br /> Thickness of source 4 6 m <br /> ' Thickness of vadose zone 9 1 m- <br /> Infiltration rate (vDarcy) 7 40E-05 m/d <br /> Porosity In vadose zone 0 25 [-] <br /> Moisture content in vadose zone 0 16 [ ] <br /> soil bulk density 1 7 g/cm3 <br /> Fraction organic carbon in soil 5 OOE-03 g/gg <br /> calculated pore water velocity 4 69E-04 m/d <br /> chemical-specific Parameters <br /> ------------------------------------------------ <br /> solubility 0 43 mg1 <br /> Henrys Law Coefficient 82 [-]/ <br /> KOC, organic carbon partition coeff 3 20E+04 ml/g <br /> calculating Dissolved Phase source concentration <br /> ------------------------------------------------ <br /> This chemical is considered part of a TPH mixture <br /> Mass fraction of TPH in soli 7 52E-03 kg/k <br /> Molecular weight of TPH 1 50E+02 g/mol <br /> Mass fraction of chemical in soil 1 04E-03 k /k <br /> Molecular weight of chemical 1 30E+02 g mol <br /> ' calculated mole fraction of chemical 0 16 mo /mo <br /> Calculated effective solubility 6 84E-02 mg/l <br /> Dissolved phase concentration calculated <br /> using equilibrium partitioning (3-phase) 6 3 mg/l <br /> ' Residual concentration level calculated <br /> using the calculated effective solubility <br /> (which accounts for mole fraction) 11 mg/kg <br /> ' ***The lesser value of the (effective) solubility and the dissolved phase <br /> ***concentration calculated using equilibrium partitioning (see above) will <br /> ***be used as the maximum concentration in the unsaturated zone <br /> ***model source <br /> f� Results from above calculation <br /> (limiting concentration) <br /> ------------------------------------------------ <br /> Initial dissolved phase concentration 6 84E-02 mg/l <br /> ' Residual concentration level calculated <br /> using the full solubility 71 mg/kg <br /> ***The source concentration IS ABOVE the residual concentration <br /> 1 source Decay Terms <br /> -source total decay term--Beta 3 55E-08 <br /> ' source loss term--liguids only [1/day] 6 24E-10 <br /> source loss term--vapor only1/day] 3 49E-08 <br /> initial source vapor concentration kg/mA3] 5 61E-03 <br /> ' Page 1 <br />