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APPENDIX A-13 <br /> HUMAN HEALTH SCREENING EVALUATION <br /> SURLAND HOMES PROPERTY <br /> ' TRACY,CALIFORNIA <br /> PROJECT 6447.007 <br /> FINAL <br /> ' DERMAL CONTACT AND INCIDENTAL INGESTION OF SOIL-Cancer <br /> ' Chemical Concentration Absorption Oral Slope Excess Cancer <br /> Soil(Cs) Fractions Soil Factor(SFo) Risk <br /> (ABSds) <br /> (mg/kg) O (m -d)-' (—) <br /> Chrysene 0.33 0.15 0.12 1.7E-07 <br /> ' Risk,o;� = SF, x Ca x 2E-07 <br /> IR.... x EF x ED,dw,x 10'6 kg/mg <br /> ' BW,dw, x AT x 365 days/yr <br /> IRSmad x EF x ED,hdd " 10-6 kg/mg <br /> + SFoxCax <br /> BW,hdd x AT x 365 days/yr <br /> + SF. x C x SAadWt x AF x ABS x EFadO x EDadwt x 10"6 kg/mg <br /> BWad„hx AT x 365 days/yr <br /> + SF, x Ca x SAandd x AF x ABS x EF,,, x EDandd x 10'6 kg/mg <br /> BW,hdd x AT x 365 days/yr <br /> iParameter Symbol Values yUnitsEx osure Fre uenc -in estion EFi 350Ex osure Duration-adult EDar 24 <br /> Exposure Duration-child EDcr 6 yrs <br /> Body Weight-adult BWar 70 k <br /> Body Weight-child BWcr 15 k <br /> Averaging Time-Cancer ATca 70 yrs <br /> Ingestion Rate-adult IRsar 100 m d <br /> Ingestion Rate-child IRscr 200 m d <br /> ' Exposure Frequency-dermal <br /> contact/adult EFdc 100 d/yr <br /> Exposure Frequency-Dermal <br /> contact/child EFdc 350 d/yr <br /> Surface Area-adult SAsar 5800 cm2 <br /> Surface Area-child SAscr 2000 cm2 <br /> ' Soil-to-Skin Adherence Factor AF 1 mg/cm2 <br /> Conversion Factor from mg to kg CFm -k IE-06 kg/mg <br /> ' NA=Not Applicable <br /> ' is\project\6000s\6447\6447.007\hra stand alone doc\pea risk for surland.xls Page 13 of 18 <br />