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ATTACHMENT <br /> HUMAN HEALTH SCREENING EVALUATION <br /> BURNSPROPERTY <br /> 1887 PROPERTY,TRACY,CALIFORNIA <br /> PROJECT 97243.002 <br /> EMISSION RATES AND AIR CONCENTRATIONS OF VOLATILE COPC FROM SOIL <br /> Total Emission Rate(Ei) Air <br /> Bulk Soil Soil-Organic Soil/Air 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- for non-VOCs <br /> Chemical Sitewide Diffusivity(Dei) Constant(H) Coefficient Coefficient (Ca) cancer(Ca) <br /> (Ci) (Kd) (Kas) Cancer cancer (Ca) <br /> (-g/kg) ( /-soil) (cm2/sec) atm-m3/mole (1/k) (g/cm) (Mg/See) m /sec (mg/m3) (mg/m3) (mg/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 9.3E-05 NA <br /> Benzo(a)anthracene 1.80E-01 1.80E-07 4.1E-03 3.35E-06 7.96E+03 1.7E-08 1.1E-I1 2.0E-07 4.4E-07 NA NA 9.0E-09 <br /> Ch Bene 1.00E+00 1.00E-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 2AE-03 1.61E-05 2.14E+03 3.1E-07 1.1E-10 6.0E-07 1.4E-06 NA NA 8.5E-09 <br /> Flumene 3.70E+00 3.70E-06 4.9E-03 6.42E-05 1.58E+02 1.7E-05 1.2E-08 l AE-04 3.1E-04 2.8E-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 5.70E+00 5.70E-06 4.8E-03 3.90E-05 5.44E+02 2.9E-06 2.1E-09 8.8E-05 2.0E-04 NA NA 2.9E-07 <br /> P rene 7.80E-01 7.80E-07 2.2E-03 1.10E-OS 2.10E+03 2.1E-07 6.9E-11 2.2E-06 4.9E-06 NA NA 3.9E-08 <br /> Toluene ND NA 6.2E-03 5.94E-03 5.14E+00 4.7E-02 4.4E-OS NA NA NA NA NA <br /> X lene ND NA 7.0E-03 5.30E-03 4.80E+00 4.5E-02 4.7E-05 NA NA NA NA NA <br /> E2 A D„P,K„C; x 10'mg/g <br /> _ <br /> aaT <br /> D,; P. <br /> a P.+[(p)(I-P.)/K„) <br /> Parameter Symbol Value Units <br /> Soil Bulk Density b 1.5 cm3 <br /> Particle Density 2.65 cm3 <br /> Air Filled Soil Porosity Pa 0.284 unitless <br /> Exposure Interval-Cancer Tea 9.5E+08 sec <br /> Exposure Interval-Non-cancer Tnc 1.9E+08 sec <br /> Conversion Factor from mZ to cm2 CF-m 1.E+03 mg/g <br /> Conversion Factor from g to kg CFm-k l.E-06 kg/mg <br /> Length of Area-residential LS 22 m <br /> Wind Speed V 2.25 m/sec <br /> Mixing Height MH 2 m <br /> Particulate Matter PM10 0.05 mg/m3 <br /> ND=Not detected <br /> NA=Not Applicable <br /> i:\pmject\7000s\7243\bums_pea update_copy.xls Page 8 of 18 <br />