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Now- <br /> STOCKTON POLICE FACILITY <br /> SESOIL INPUT PARAMETERS <br /> WORST CASE SOIL CONTAMINATION Benzene Toluene Xylenes Ethylbenzene <br /> Initial Soil Concentration (PPM) 20 190 1100 200 <br /> _ Organic Carbon <br /> Thickness Content <br /> SOIL PROFILE (ft.) (cm.) M <br /> Clean Soil, model layer 1, - 0 to 3' 3 91.44 1.16 <br /> Impacted Soil, model layer 2, - 3' to 8' 5 152.4 0.22 <br /> Silt and Clay Soil - 8' to 28' 20 609.6 0.22 <br /> Silt and Sand Soil, - 28' to 38' 10 304.8 0.22 <br /> d SOIL PARAMETERS - SILT <br /> Bulk density (g/cm3) 1.5 <br /> Intrinsic permeability (cm2) 5.E-11 <br /> Disconnectedness Index 12 <br /> Effective Porosity 0.27 <br /> Cation exchange capacity (meq/1009) 0 <br /> Freundlich eqn. exponent 1 <br />•- CHEMICAL PARAMETERS Benzene Toluene Xylenes Ethylbenzene <br /> Solubility (mg/1) 1790 526 159 152 <br /> Diffusion coeff. in air (cm2/sec) 0.077 0.085 0.050 0.09234 <br /> Henry's constant (m3-atm/mole) 0.00555 0.00664 0.0068 0.0079 <br /> _ Adsorp. coeff. of org. carbon (ug/g-OC)/(ug/ml) 31 95 830 250 <br /> ' Adsorption coeff. (ug/g)/(ug/ml) NA NA NA NA <br /> Molecular weight (g/mole) 78.11 92.14 106.17 106.17 <br /> Neutral Hydroloysis (1/day) 0 0 0 0 <br /> j Base Hydroloysis (1/mole/day) 0 0 0 0 <br /> ' Acid Hydroloysis (1/mole/day) 0 0 0 0 <br /> Biodegradation rate, Liquid phase (1/day) 0.017 0.14 0.0063 0.019 <br /> Biodegradation rate, Solid phase (1/day) 0.017 0.14 0.0063 0.019 <br /> Ligand stability constant 0 0 0 0 <br /> Moles ligand per mole 0 0 0 0 <br /> MW. of the ligand (g/mole) 0 0 0 0 <br /> NA = Not Applicable <br />_. w:\94368\mode1\summary3.x1s <br />