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APPENDIX A-6 <br /> HUMAN HEALTH SCREENING EVALUATION <br /> SURLAND HOMES PROPERTY <br /> TRACY,CALIFORNIA <br /> PROJECT 6447.007 <br /> FINAL <br /> CALCULATION OF SOIL SATURATION CONCENTRATIONS(Cast) <br /> Organic Carbon <br /> Partition Aqueous Henry's Law Soil-Organic Saturation Maximum Free <br /> Chemical Coefficient Solubility(S) Constant Partition Concentration Concentration <br /> (H') <br /> (Koc) Coefficient(Kd) (Gaal) Soil(Cs) Phase? <br /> V mRA) (unitless) (V m m <br /> Eth (benzene 2.20E+02 1.61E+02 3.46E-01 4.40E+00 735 1.5 No <br /> Toluene 2.57E+02 5.35E+02 2.44E-01 5.14E+00 2,827 0.04 No <br /> Xylenes,Total 2.40E+02 2.00E+02 2.17E-01 4.80E+00 988 3.9 No <br /> Acenaphthene 4.60E+03 3.88E+00 4.92E-02 9.20E+0l 357 0.63 No <br /> Ch Bene 3.98E+05 1.60E-03 3.88E-03 7.96E403 13 0.33 No <br /> ' Fluoranthene 1.07E+05 2.06E-01 6.60&04 2.14E403 441 0.018 No <br /> Fluorene 7.90E+03 1.90E+00 2.63E-03 1.58E+02 300 1.4 No <br /> Phenanthrene 2.72E+04 9.98E-01 1.60E-03 5.44E+02 543 2.8 No <br /> Pyrene 1.05E+05 1.35E-01 4.51E-04 2.10E+03 284 0.079 No <br /> C. _ (S/Pb)(KdPb+P.+(H'.P.)) <br /> Kd =K. x f. <br /> Parameter Symbol Value Units <br /> Fraction Organic Carbon foc 0.02 s <br /> Bulk Density b 1.5 <br /> Water Filled Soil PorosityPW 0.15 s <br /> Air Filled Soil PorosityPa 0.284 ;uEnitless <br /> r <br /> r <br /> r <br /> r <br /> I <br /> r <br /> 1 <br /> r <br /> Iprojec06000sV,a47\6447.1g71hansnd alone docbea risk for surlend.xls Page 6 of 18 <br />