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r <br /> APPENDIX C <br /> HUMAN HEALTH SCREENING EVALUATION <br /> POMBO PROPERTY <br /> 1755 WEST 11TH STREET,TRACY,CALIFORNIA <br /> PROJECT#5650 <br /> DERMAL CONTACT AND INCIDENTAL INGESTION OF SOIL-Cancer <br /> Chemical Concentration Absorption Oral Slope Excess Cancer <br /> Soil(Cs) Fractions Sail Factor(SFo) Risk <br /> (ABSds) <br /> (mg/kg) (—) (mgfkg-d)-' (-) <br /> Eth (benzene 1.3 0.1 NA NA <br /> Toluene 7.5 0.1 NA NA <br /> Xylenes,Total 3.4 0.1 NA NA <br /> Acenaphthene 0.76 0.15 NA NA <br /> Benzo(a)anthmcene 0.13 1 0.15 1.2 6.8E-07 <br /> Ch Bene 0.54 0.15 0.12 2.8E-07 <br /> Fluomnthene 0.098 0.15 NA NA <br /> Fluorene 3.9 0.15 NA NA <br /> Naphthalene 3.3 0.15 NA NA <br /> Phenanthrene 5.1 0.15 NA NA <br /> pyrone 0.27 0.15 NA NA <br /> IE-06 <br /> IR...,x EF 'a ED,,,x 10°kg/mg <br /> Riskmd = SF, x C, x BW,, x AT x 365days/yr <br /> IRs...x EF x ED,,, x 10'6 kg/mg <br /> + SF, x C, x BW d,x x AT x 365 days/yr <br /> x SA.dw, x AF x ABS x EF,,,,x ED,d,c x 10'6 kg/mg <br /> + SF x C <br /> BW,.,x AT x 365 days/yr <br /> + SF x C, x SArwd x AF x ADS x EF,nid x EDm'W x 10'6 kg/mg <br /> BW,s;u x AT x 365 days/yr <br /> Parameter Symbol Values Units <br /> Exposure Frequency-ingestion EFig 350 d/yr <br /> Exposure Duration-adult EDar 24 yrs <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 Arca 70 yrs <br /> Ingestion Rate-adult IRsm 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/ r <br /> SurfaceArea-adult SAsm 5800 cm' <br /> SurfaceArea-child SAscr 2000 cm' <br /> Soil-to-Skin Adherence Factor AF 1 m cm' <br /> Conversion Factor from mg to kg CFm.k IE-06 kg/mg <br /> pombooisk soil Page 13 of 18 <br />