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ATTACHMENT3 <br /> HUMAN HEALTH SCREENING EVALUATION <br /> • BURNS PROPERTY <br /> 1887 PROPERTY,TRACY,CALIFORNIA <br /> PROJECT#7243.002 <br /> CALCULATION OF SOIL SATURATION CONCENTRATIONS(Csat) <br /> Organic Carbon Soil-Organic Saturation Maximum <br /> Partition Aqueous Henry's LawFree <br /> Chemical Partition Concentration Concentration phase? <br /> Coefficient Solubility(S) Constant(H') Coefficient(Kd) (Csat) Soil(Cs) <br /> (Koc) <br /> (Vkg) (mg/1) (unitless) U (mg/kg) (mg/kg) <br /> Acenaphthene 4.60E+03 3.88E+00 4.92E-02 9.20E+01 357 0.94 No <br /> Benzo(a)anthracene 3.98E+05 9.40E-03 1.37E-04 7.96E+03 75 0.18 No <br /> Ch Bene 3.98E+05 1.60E-03 3.88E-03 7.96E+03 13 1 No <br /> Fluoranthene 1.07E+05 2.06E-01 6.60E-04 2.14E+03 441 0.17 No <br /> Fluorene 7.90E+03 1.90E+00 2.63E-03 1.58E+02 300 3.7 No <br /> Naphthalene 1.29E+03 3.17E+01 2.05E-02 2.58E+01 820 6.8 No <br /> Phenanthrene 2.72E+04 9.98E-01 1.60E-03 5.44E+02 543 5.7 No <br /> Pyrene 1.05E+05 1.35E-01 4.51E-04 2.10E+03 284 0.78 No <br /> Toluene 2.57E+02 5.35E+02 2.44E-01 5.14E+00 2,827 0 No <br /> Xylene 2.40E+02 2.00E+02 2.17E-01 4.80E+00 988 0 No <br /> Cs, = (S/Pb)(KdPb+Pw+(Hix Pa)) <br /> Kd = Ko. x fo <br /> Parameter Symbol Value Units <br /> Fraction Organic Carbon foc 0.02 unitless <br /> 3 <br /> Bulk Density pb 1.5 9/cm <br /> Water Filled Soil Porosity PW 0.15 unitless <br /> Air Filled Soil Porosity Pa 0.284 unitless <br /> • <br /> burns_pea update copy\soil sat Page 6 of 18 <br />