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ATTACHMENT 3 <br /> HUMAN HEALTH SCREENING EVALUATION <br /> BURNSPROPERTY <br /> 1887 PROPERTY,TRACY,CALIFORNIA <br /> PROJECT 97243.002 <br /> PHYSICOCHEMICAL PROPERTIES <br /> Log Octanol Organic <br /> Water Carbon Molecular Permeability Constant <br /> Henry's Law Henry's Law Aqueous Vapor � y Absorption <br /> Chemical Partition Diffusivity in Air(Di) Partition Weight VOC. r P <br /> Constant(H) Constant(H') Solubility(S) Pressure(VP) (Kp) <br /> Coefficient(log Coefficient (MW) Fractions <br /> Kow) (Koc) Soil(ABSds) <br /> given calculated given calculated <br /> (--) (atm-m'/mole) unitless (Mg/1) (CM2/see) (cm2/sec) /mole (mm H (cm/hr) (cm/hr) (--) <br /> Acenaphthene 3.92 1.20E-03 4.92E-02 3.88E+00 0.064 4.60E+03 154.2 2.23E-03 Yes NA 0.092 0.15 <br /> Benzo(a)anthracene 5.66 3.35E-06 1.37E-04 9.40E-03 0.051 3.98E+05 228.3 5.31E-07 No 0.81 0.15 <br /> Ch Bene 5.66 9.46E-05 3.88E-03 1.60E-03 0.025 3.98E+05 228.3 5.30E-09 No 0.81 0.15 <br /> Fluoranthene 4.95 1.61E-05 6.60E-04 2.06E-01 0.0302 1.07E+05 202.3 6.17E-05 No 0.36 0.15 <br /> Fluorene 4.21 6.42E-05 2.63E-03 1.90E+00 0.061 7.90E+03 166.2 2.35E-03 Yes NA 0.123 0.15 <br /> Naphthalene 3.30 5.00E-04 2.05E-02 3.17E+01 0.069 1.29E+03 128.2 0.082 Yes 0.069 0.15 <br /> Phenanthrene 4.57 3.90E-05 1.60E-03 9.98E-01 NA 0.060 2.72E+04 178.24 4.44E-04 No 0.27 0.15 <br /> Pyrene 5.11 1.10E-05 4.51E-04 1.35E-01 0.027 1.05E+05 202.26 3.09E-05 No NA 0.310 0.15 <br /> Toluene 2.73 5.94E-03 2.44E-01 5.35E+02 0.078 2.57E+02 92 2.84E+01 Yes 0.045 0.1 <br /> Xylenes,Total 3.17 5.30E-03 2.17E-01 2.00E+02 0.087 2.40E+02 106.2 7.90E+00 Yes 0.08 0.1 <br /> H'= H*41 <br /> Source: Cal-EPA,1994 <br /> Di= (0.001T^1.75*(1/MWi+I/MWa)^0.5) <br /> (Pa*[(Vi)^1/3+(Va)^1/3)]^2) <br /> Source: See"Di Calculation"Worksheet <br /> Kp= 10^(-2.8+0.067logKow-0.0056MW) <br /> Source: U.S.EPA,1998 <br /> NA=Not Available <br /> For chemicals not listed in Table A-1 of the PEA Manual,a permeability constant was calculated based on U.S.EPA's Dermal Exposure Assessment Guidance(1998)instead of choosing a surrogate value <br /> from Table A-1 based on similar values for MW and Kow as recommended in the PEA Manual. <br /> bums_pea update_copy\phychem and abs Page 4 of 18 <br />