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APPENDIX C <br /> HUMAN HEALTH SCREENING EVALUATION <br /> BURNSPROPERTY <br /> 1887 PROPERTY,TRACY,CALIFORNIA <br /> PROJECT#5650 <br /> 0 <br /> EMISSION RATES AND AIR CONCENTRATIONS OF VOLATILE COPC FROM SOIL <br /> Total Emission Rate(Ei) <br /> Soil-Organic Soil/Air Air <br /> Bulk Soil Air Concentration Air Concentration <br /> Surface Soil Effective Henry's Law Partition Partitiion Concentration <br /> Concentration Alpha Residential Residential Non- for VOCs Cancer for VOCs Non- <br /> Chemiul Silewide Ci Diffusivity(Dei) Constant(H) Coefficient Coefficient Ca cancer Ca for non-VOCs <br /> (Ci) (Kd) (Kai) Cancer cancer (Ca) ( ) (Ca) <br /> (mg/kg) -soil (cm=/sec) aim-mWmole 1/k ( /cm') (mg/sec (.g/sec (m /ms) (m /mt) (m /m) <br /> Acenaphthene 9.40E-01 9.40E-07 5.1E-03 1.20E-03 9.20E+01 5.3E-04 4.1E-07 2.0E-04 4.5E-04 4.1E-05 93E-05 NA <br /> Benzo a anthracene 1.30E-01 1.30E-07 4.1E-03 3.35E-06 7.96E+03 1.7E-08 1.1E-I I 1.4E-07 3 2E-07 NA NA 6 5E-09 <br /> Ch Bene IOOE+00 I.00E-06 2.0E-03 9.46E-05 7.96E+03 4.9E-07 1.5E-10 4.1E-06 9.1E-06 NA NA 5.0E-08 <br /> Fluoranthene 1.70E-01 1.70E-07 2.4E-03 1.61E-05 2.14E+03 3.IE-07 1.1E-10 6.0E-07 14E-06 NA NA 8.5E-09 <br /> Fluorene 3.70E+00 3.70E-06 4.9E-03 6.42E-05 1.58E+02 1.7E-05 1.2E-08 1.4E-04 3.I E-04 28F,-05 6.3E-05 NA <br /> Naphthalene 6.80E+00 6.80E-06 5.5E-03 5.00E-04 2.58E+01 8.0E-04 6.6E-07 1.9E-03 4 2E-03 3.8E-04 8.5E-04 NA <br /> Phenanthrene 5.10E+00 5.70E-06 4.8E-03 3.90E-05 5.44E+02 2.9E-06 2.1 E-09 8.8E-05 2 OE-04 NA NA 2 9F-07 <br /> P rene 1.80E-01 I 1.80E-07 1 2.2E-03 I I IOE-05 2.10E+03 2.1E-07 6.9E-11 5.1E-07 LIE-06 NA NA 90E-09 <br /> E <br /> 2 A D„P,K, C; * 10'mg/g <br /> _ <br /> n a T <br /> D,, P. <br /> a P.+I(p)(I-P.)/K..l <br /> Parameter Symbol Value Units <br /> Soil Bulk Density b 1.5 cm' <br /> Particle Density 2.65 cm' <br /> Air Filled Soil Porosity Pa 0 284 unitless <br /> Exposure Interval-Cancer Tca 9 5E+08 sec <br /> Exposure Interval-Non-cancer Tnc 19E+08 sec <br /> Conversion Factor from mz to cm' CF,-.. I.E+03 mg/g <br /> Conversion Factor from g to kg CFm-k I E-06 kg/mg <br /> Length of Area-residential LS 22 m <br /> Wind Speed V 2.25 msec <br /> Mixing Height MH 2 m <br /> Particulate Matter PM10 0.05 mg/m' <br /> bumslsoil-er and Ca Page 8 of 18 <br />