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i i i i MM <br /> APPENDIX A4 <br /> HUMAN HEALTH SCREENING EVALUATION <br /> SURLAND HOMES PROPERTY <br /> TRACY,CALIFORNIA <br /> PROJECT 6447.007 <br /> FINAL <br /> EMISSION RATES AND AIR CONCENTRATIONS OF VOLATILE COPC FROM SOIL <br /> Sail-Organic Soil/Air Total Emission Rate(Ei) Air <br /> Bulk Sail Effective Henry'saw Partition Parlitiion Air Concentration Air Concemntiov <br /> Chemical Concentration y' Concentration <br /> Surface Soil Alpha Residential Residential Non- for VOCs Cancer far VOCs Non- <br /> Diffmivity(Dei) Constant(H) Coefficient nt Coefficient far v(C.) <br /> Sitewide (Ci) (Kd) (Kos) Cancer uveas (Cal cancer(Ca) <br /> (CeJ <br /> Eth Ibenaene 1.5 1.50E-06 6.011-03 8.44E-03 440E+00 7.9E-02 7.0E-05 4.3E-03 9.5E-03 8.7E-04 2.0E-03 NA <br /> Toluene 0.04 1.00E-08 6.2E-03 5.94E-03 5.14E+00 4.7E-02 4.4E-05 9.0E-05 2.0E-04 1813-05 4.1E-05 NA <br /> Xylenes,Total 3.9 1.90&06 7.0E-03 5.30E-03 4.80E+00 4.5E-02 4.7E-05 9.1E-03 2.0E-02 19E-03 4.1E-03 NA <br /> Acene M1thene 063 6.30E-07 5.1E-03 1.20E-03 920E+01 5.3E-04 4.1E-07 1.4E-04 3.0E-04 2.811-05 6.2E-05 NA <br /> Flumen 14 1.40E-()(1 4.9E-03 6,42E-051.58E+02 1.713-05 1.2E-08 5.2E-05 1.2E-0I 1.1E-05 24E-05 NA <br /> E _ 2 A D„P.K C. z 10'mg/g <br /> . T <br /> _ D,; x P. <br /> n P.+((P)(I-P.)/K.] <br /> Parameter symbol Value Units <br /> Soil Bulk Density b LS cm3 <br /> Particle Density 2065 cm3 <br /> Air Filled Soil Porosity Pa 0.284 unitless <br /> Ez osurelntcrval-Cancer Tea 9.5E+0B aec <br /> Exposure Intmal-Nor- cer Tnc 19E+08 sec <br /> Conversion Factor from mato cm' CF . LE+03 mg/g <br /> Conversion Factor from g to kg CF„, LE4b kg/mg <br /> Length of Area-residential LS 22 to <br /> WindSpeed V1,21 Msec <br /> H <br /> Mixin Hci t M2to <br /> Poniculatc Matter PM10 0.05 m m3 <br /> NA=Not Applicable <br /> i:`pymKaWaViMM4I].aOMm Md alone doc`pee risk 6n svl adt k <br /> late or 1P <br />