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' TPH c5-6 <br /> FATE AND TRANSPORT MODEL OUTPUT FOR TPH Aliphatic c5-6 <br /> art of VADOSE ZONE MODEL OUTPUT <br /> ' -Effective-Diffusion^Coefficient-for-vadose-zone <br /> Total thickness of subunit [cm] 1 60E+02 <br /> Air-filled' porosity [-] 9 22E-02 water-filled rosit [-] 0 16 <br /> Total porosity [-] 0 25 <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 /> 40 <br /> Total porosity [-] <br /> Effective diff coeff for subunit [cmA2/s] 1 20E-05 <br /> overall Effective Diffusion Coefficient <br /> - <br /> Overall diffusion path length [ml 3 8 <br /> Overall effective diffusion coefTIcient cmA2/s] 2 22E-05 <br /> ' overall effective diffusion coefficient [mA2/d] 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 (voarcy) 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 69E-03 g/g <br /> Calculated pore water velocity 4 69E-04 m/d <br /> chemical-specific Parameters <br /> ------------------------------------------------ <br /> solubility 36 mg/l <br /> Henrys Law coefficient 34 [-] <br /> Koc, organic carbon partition coeff 7 90E+02 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 soil 7 52E-03 /kg <br /> Molecular weight of TPH 1 50E+02 g/mal <br /> Mass fraction of chemical in soil 1 04E-03 k /kg <br /> Molecular weight of chemical 81 g mol <br /> ' calculated mole fraction of chemical 0 26 mo /MO <br /> calculated effective solubility 9 2 mg/l <br /> Dissolved phase concentration calculated <br /> using equilibrium partitioning (3-phase) 1 76E+02 mg/1 <br /> ' Residual concentration level calculated <br /> using the calculated effective solubility <br /> (which accounts for mole fraction) 54 mg/kg <br /> ***The lesser value of the (effective) solubility and the dissolved phase <br /> ***concentration calculated using equilibrium partition ng (see above) will <br /> ***be used as the maximum concentration in the unsaturated zone <br /> ***model source <br /> ' Results from above calculation <br /> (limiting concentration) <br /> -__--------------------------------------------- <br /> initial dissolved phase concentration . 9 2 mg/l <br /> ' Residual concentration level calculated <br /> using the full solubility 2 12E+02 mg/kg <br /> ***The source concentration 'is ABOVE the residual concentration <br /> source Decay Terms <br /> - ^ ------------------- <br /> source totaldecay term--Beta2 03E-06 <br /> ' source loss term--liquids onlT [1/day]. 8 39E-08 <br /> source loss term--vapor only 1/day 1 95E-06 <br /> Initial source vapor concentration }kg/mA3] 0 31 <br /> Page 1 <br />