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' TPH C10-12 <br />' FATE AND TRANSPORT MODEL OUTPUT FOR TPH Aliphatic C10-12 <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 <br /> ' water-filled porosity [-] 0 16 <br /> Total porosity [-] 0 25 <br /> Effective diff coeff for subunit [cmA2/s] 5 67E-04 <br /> ' EffectiveDiffusioncoefficientfarLens <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 [-] 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/d] 1 91E-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 1n soil 5 OOE-03 g/gg <br /> Calculated pore water velocity 4 69E-04 m/d <br /> Chemical-Specific Parameters <br /> ------------------------------------------------ <br /> Solubility 3 40E-02 mg/1 <br /> Henrys Law coefficient 1 30E+02 [- <br /> Koc, organic carbon partition coeff 2 50E+05 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/kg <br /> Molecular weight of TPH 1 50E+02 g/mol <br /> Mass fraction of chemical -in soil 2 17E-03 kg/k <br /> Molecular weight of chemical 1 60E+02 �gmo�[ <br /> ' Calculated mole fraction of chemical 0 27 mol/mo <br /> Calculated effective solubility 9 21E-03 mg/l <br /> Dissolved phase concentration calculated <br /> using equilibrium partitioning (3-phase) 1 7 mg/l <br /> Residual concentration level calculated <br /> using the calculated effective solubility <br /> (which accounts for mole fraction) 12 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 /> Results from above calculation <br /> (limiting concentration) <br /> ------------------------------------------------ <br /> initial dissolved phase concentration 9 21E-03 mg/l <br /> ' Residual concentration level calculated <br /> using the full solubility 43 mg/kg <br /> ***The source concentration is ABOVE the residual concentration <br /> Source Decay Terms <br /> - __ <br /> source total decay term--Beta 3 59E-09 <br /> ' source loss term--liquids only C1/day] 4 01E-11 <br /> source loss term--vapor only `1/day] 3 55E-09 <br /> Initial source vapor concentration kg/mA3] 1 20E-03 <br /> Page 1 <br /> 1 <br />