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APPENDIX C <br /> HUMAN HEALTH SCREENING EVALUATION <br /> POMBO PROPERTY <br /> 1755 WEST I ITH STREET,TRACY,CALIFORNIA <br /> PROJECT 45650 <br /> EXPOSURE PARAMETERS AND CONTSTANTS <br /> Parameter Svmbol Units Adult Resident Child Resident Sources <br /> ALL PATHWAYS <br /> Exposure Duration ED 24 6 <br /> BodyWeight BW k 70 15 <br /> Averaging Time-Non-cancer ATnc yr 24 6 <br /> Averaging Time-Cancer ATca yr 70 70 <br /> INCIDENTAL INGESTION OF SOIL <br /> Exposure Frequency EFi d/' 350 350 <br /> Ingestion Rate IRs m d 100 200 <br /> DERMAL CONTACT WITH SOIL <br /> Exposure Frequency EFdc d/yr 100 350 <br /> Exposed Skin Surface Area SAS cmi 5,800 2,000 <br /> Soil-to-Skin Adherence Factor AF m cm' 1 1 <br /> INHALATION OF VOLATILES IN AIR <br /> Exposure Frequency EFad/ 350 350 <br /> Inhalation Rate Ma mi/d 20 10 <br /> Intake Rate(Inhalation) IRvoc Ld 2 I <br /> Residential Ex surelnmrval-cancer Tea sec 9.5E+08 <br /> Residential Exposure Interval-Nonwncer True sec 1.9E+08 <br /> INGESTION OF GROUNDWATER <br /> Exposure Frequency EFdw d' 350 350 <br /> Intake Rate(Water) IRw L/d 1 2 1 <br /> DERMAL CONTACT WITH GROUNDWATER WHILE SHOWERING <br /> Exposure TimeET hr/da 0.25 0.14 4 15 min.baths/week <br /> Exposure Frequency EFswr d/ 350310 <br /> Skin Surface Area SAswr <me 23,000 7,200 <br /> SOIL PROPERTIES <br /> Fraction Organic Carbon the 0.02W=itless <br /> Soil Bulk Density b ;0.434 <br /> Panicle Density <br /> Water Filled Soil PorosityPw <br /> Soil Moisture Content Om <br /> Air Filled Soil PorosityPa <br /> Total Soil PorosityP[ <br /> SITE-SPECIFIC PROPERTIES <br /> Length ofAreat-residential LS 22 m <br /> Wind Speed V 2.25 Msec' <br /> Mixin Hei ht MH 2 To <br /> Particulate Matter PM10 0.05 m m3 <br /> Areaof Contamination A 4.84E+06 cm, <br /> DIFFUSIVITY IN AIR CONSTANTS <br /> Tem lure T 298 °K <br /> Molecular Weight of Air MWa 28.6 mole <br /> Absolute Pressure Pab I atmos hens <br /> Molecular Diffusion Volume of Air Va 20.1 cm3/mole <br /> UMTS CONVERSION FACTORS <br /> Conversion Fraser from g to mg CF-m I.E+03 mg/g <br /> Conversion Factor from mg to kg CFm y LE-06 kg/mg <br /> Conversion Factor from L to cm3 CF, LE-03 L/emi <br /> pombokap and constants Page 2 of 18 <br />