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APPENDIX C <br /> HUMAN HEALTH SCREENING EVALUATION <br /> POMBO PROPERTY <br /> 1755 WEST 11TH STREET,TRACY,CALIFORNIA <br /> PROJECT N5650 <br /> INGESTION OF AND DERMAL CONTACT WITH non-VOCs in GROUNDWATER-Cancer <br /> Concentration <br /> Chemical Groundwater Permeability Oral Slope Excess Cancer <br /> (Cw) Constant (Kp) Factor(SFo) Risk <br /> (mg/L) (cm/hr) (mg/kg-d)-' (—) <br /> Eth (benzene ND 0.074 NA NA <br /> Toluene ND 0.045 NA NA <br /> Xylenes,Total ND 0.08 NA NA <br /> Acenaphthene ND 0.09 NA NA <br /> Benzo(a)mahmcene ND 0.81 1.2 ND <br /> Chrysene ND 0.81 0.12 ND <br /> Fluoranthene ND 0.36 NA ND <br /> Fluorcne 0.0002 0.12 NA NA <br /> Naphthol ne ND 0.069 NA NA <br /> Phenanthrene 0.0003 0.27 NA NA <br /> Pyrene ND 0.31 NA ND <br /> 0E+00 <br /> IRw.dw, x EF x ED.um <br /> Risk,„,u, = SF, x Cw x <br /> BW,,,, x AT x 365 day/yr <br /> IRw.miu x EF x EDman <br /> + SF x C„, x BW mu x AT x 365day/yr <br /> + SF, z Cw x SA m.0 x K. x EF x ED ed.nx Er,., x IU1000 cm3 <br /> BW,.,, x AT x 365 days/yr <br /> + SF. x Cw x SA,n;id x Kp x EF x ED.;idx Ercnnd x 1 V1000 CM3 <br /> B{Vcnim x AT x 365 days/yr <br /> Parameter Symbol Values Units <br /> Exposure Frequency EFdw 350 d/yr <br /> Exposure Duration-adult EDar 24 yr <br /> Exposure Duration-child EDcr 6 yr <br /> Body Weight-adult BWar 70 k <br /> Body Weight-child BWcr 15 k <br /> Averaging Time-Cancer Arca 70 yr <br /> Intake Rate-adult IRwar 2 L/d <br /> Intake Rate-child IRwcr 1 L/d <br /> Skin Surface Area-adult SAswrar 23,000 cm' <br /> Skin Surface Area-child SAswrcr 7,200 cm' <br /> Exposure Time-adult ETar 0.25 hr/da <br /> Expos Time-child ETcr 0.14 hr/da <br /> Conversion Factor from L to cm3 CFLti, 0.001 L/cm' <br /> pombokisk gw non-VOCs Page 9 of 18 <br />