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APPENDIX A-5 <br /> HUMAN HEALTH SCREENING EVALUATION <br /> SURLAND HOMES PROPERTY <br /> TRACY,CALIFORNIA <br /> PROJECT 6447.007 <br /> FINAL <br /> PHYSICOCHEMICAL PROPERTIES <br /> Log Dermal Organic <br /> Water Carbon Molecular <br /> Henry's Law Henry'sLaw Aqueous Carbon Permeability Constant <br /> Co <br /> Chemical Partition Constant(H) Constant(H') Solubility(S) Diffusivity in Air(Di) Partition Weight Pressure(VP) VOCv. (Kp)i Absorption <br /> Coefficient(log Coefficient (MW) Fractions Soil <br /> Kew) (Karl (ABSds) <br /> given calculated given calculated <br /> atm-m2/molelimitless) m cm2/sec (cm2/sec) (Vkg) (g/mole mm H (cm/hr) (cm/ht)-) <br /> Eth (benzene 3.15 8.44E-03 3.46E-01 1,61E+02 0.075 2.20E+02 106.2 9.5 Yes 0074 0.1 <br /> Toluene 2.73 5.94E-03 2.44E-01 5.35E+02 0078 2.57E+02 92 28.4 Yes 0.045 0.1 <br /> Xylenes,Total 3.17 5.30E-03 2.17E-01 2.00E+02 0.087 2.40E+02 1062 7.9 1 Yes 008 0.1 <br /> Acenaphthene 3.92 1.20E-03 4.92E-02 3.88E+00 0064 4.60E+03 154.2 2.23E-03 Yes NA 0.092 0aOl <br /> 5 <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 Fluoranthene 4.95 1.61E-05 6.60E-04 206E-01 00302 1.07E+05 202.3 6.17E-05 No 0.36 Fluorene 4.21 6.42E-05 2.63E-03 1.90E+00 0.061 7.90E+03 1662 2.35E-03 Yes NA 0.123Phenanthrene 4.57 390E-05 160E-03 9.98E-01 NA 0.060 272E+04 178.24 444E-04 No 0.27 P rene 5.11 1.10E-05 4.51E-04 1.35E-01 0.027 1.05E+05 202.26 3.09E-05 No NA 0310 <br /> H'= 11.41 <br /> Source: Cal-EPA,1994 <br /> Di= (0,00ITAL75-(I/MWi+I/MWa)^0.5) <br /> (Pa•](Vi)AI/3+(Varl/3)]A2) <br /> Source: See"Di Calculation"Worksheet <br /> Kp= 101(-2.8+0067logKow-0.0056MW) <br /> Source: U.S.EPA,1998 <br /> For chemicals not listed in Table A-1 ofthe PEA Manual,a permeability constant was calculated based on U.S.EPA's Dermal Exposure Assessment Guidance(1998)instead ofchoosing a surrogate value <br /> from Table A.I based on similar values for MW and Kow as recommended in the PEA Manual. <br /> NA=Not Available <br /> rpmj¢ebaW2W4T6117.0074va mind a doc\pn risk far sudmdxls rage a„f 1s <br />