Laserfiche WebLink
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) (—) (mg/kg-d)_t (—) <br /> Chrysene 0.33 0.15 0.12 1.7E-07 <br /> 2E-07 <br /> IR,.,,, x EF x ED.d, x 10"6 kg/mg <br /> Risk, j = SF. x C, x <br /> BW.d„„ x AT x 365days/yr <br /> IR..hild x EF x SD,hdd x 10-6 kg/mg <br /> + SFoxC x <br /> BWmdd x AT x 365 days/yr <br /> + SF, xC, x SA.dy, x AF x ABS x EF.d,d, x ED.d, x 10'6 kg/mg <br /> BW.d.h x AT x 365 days/yr <br /> + SF, x C x SA,hdd x AF x ABS x EF�hnd x EDIWd x 10'6 kg/mg <br /> BW,hdd 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 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/ylr <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 1E-06 kg/mg <br /> NA=Not Applicable <br /> i:\project\6000s\6447\6447.007\hra stand alone doc\pea risk for surland.xls Page 13 of 18 <br />