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Ethylbenzene <br /> FATE AND TRANSPORT MODEL OUTPUT FOR Ethylbenzene <br /> art of VAD05E ZONE MODEL OUTPUT <br /> --------------------------------------------- <br /> ' Effective Diffusion Coefficient for tens <br /> ------------------------------------------------ <br /> Total thickness of subunit [cm] 1 80E+02 <br /> ' Air-filled porosity [- 3 84E-02 <br /> water-filled porosity L-] 0 36 <br /> Total porosity [-] 0 40 <br /> Effective diff coeff for subunit [cmA2/s] 1 40E-05 <br /> overall Effective Diffusion Coefficient <br /> ------------------------------------------------ <br /> Overall diffusion path length [m 3 8 <br /> overall effective diffusion coefficient CMA2/s] 1 18E-05 <br /> overall effective diffusion coefficient [mA2/d] 1 102E-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 9/cm3 <br /> Fraction organic carbon in soil 5 OOE-03 g/g <br /> calculated pore water velocity 4 69E-04 MA <br /> ' chemical-specific Parameters <br /> ------------------------------------------------ <br /> solubility <br /> Henrys Lacoefficient 0 32E+02 1-1l <br /> KOC, organic carbon partition coeff 3 60E+02 ml/g <br /> • calculatingDissolvedPhasesource-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 5 50E-06 T/mol/kg <br /> Molecular weight of chemical 1 06E+02 mal <br /> calculated mole fraction of chemical 1 03E-03 <br /> Calculated effective solubility 0 17 mg/l <br /> Dissolved phase concentration calculated <br /> using equilibrium partitioning (3-phase) 2 9 mg/l <br /> Residual concentration level calculated <br /> ' using the calculated effective solubility <br /> (which accounts for mole fraction) 0 33 mg/kg <br /> ***The lesser value of the (effective) solubility and the dissolved phase <br /> ***concentration calculated using equilibrium partitionin (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 0 17 mg/l <br /> Residual concentration level calculated <br /> using the full solubility 3 23E+02 mg/kg <br /> ***The source concentration is ABOVE the residual concentration <br /> Source Decay Terms <br /> ------------------------------------------------ <br /> source total decay term--Beta 3 35E-07 <br /> source loss term--liquids only [1/day] 3 OCE-07 <br /> source loss term--vapor only1 da 3 51E-08 <br /> Initial source vapor concentration }kg/mA3] 5 64E-05 <br /> ' Diffusion path length [m] 3 8 <br /> Average vertical tfiickness of the source[m] 4 6 <br /> • ***Dispersivity limited to dispmax 1 OOE-06 <br />' Page 1 <br />