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APPENDIX C <br /> HUMAN HEALTH SCREENING EVALUATION <br /> • BURNSPROPERTY <br /> 1887 PROPERTY,TRACY,CALIFORNIA <br /> PROJECT#5650 <br /> 0 <br /> ' EFFECTIVE DIFFUSION COEFFICIENT IN SOIL <br /> ' Chemical Diffusivity in Air Effective <br /> (Di) Diffusivity(Dei) <br /> ' (cm2/sec) (CM2/sec) <br /> Acenaphthene 0.064 5.1 E-03 <br /> Benzo(a)anthracene 0.051 4.1 E-03 <br /> ' <br /> Chrysene 0.025 2.0E-03 <br /> Fluoranthene 0.0302 2.4E-03 <br /> Fluorene 0.061 4.9E-03 <br /> ' <br /> Naphthalene 0.069 5.5E-03 <br /> Phenanthrene 0.06 4.8E-03 <br /> JPyrene 0.027 2.2E-03 <br /> ' Del =effective diffusivity of compound,CM2/sec <br /> D (Pa"'/Pt') <br /> • i <br /> Parameter Symbol <br /> ' Air Filled Soil Porosity Pa <br /> Total Soil Porosity Pt <br /> burns\Dei Page 7 of 18 <br />