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APPENDIX A-9 <br /> HUMAN HEALTH SCREENING EVALUATION <br /> SURLAND HOMES PROPERTY <br /> TRACY,CALIFORNIA <br /> PROJECT 6447.007 <br /> FINAL <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 /> Chrysene 0.0002 0.81 0.12 9.9E-07 <br /> 1E-06 <br /> IR,,.,d°h x EF x ED,d°h <br /> Risk..., SF. x C. x <br /> BW,d„i, x AT x 365day/yr <br /> IR,ild x EF x ED°mid <br /> + SF, x C. x <br /> BW,ndd x AT x 365day/yr <br /> + SF x C x SA,d°i, x KP x FF x ED dultx Eradalt x 1U1000 cm' <br /> ° w BW,d°t, x AT x 365 days/yr <br /> + SF x C x SA child x KP x EF x EDhildx Er°hild x 1U1000 cm3 <br /> ° W BW,hitd x AT x 365 days/yr <br /> Parameter Symbol Values Units <br /> Exposure Frequency EFdw 350 d <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 ATca 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 cm2 <br /> Skin Surface Area-child SAswrcr 7,200 cm2 <br /> Exposure Time-adult ETar 0.25 hr/da <br /> Exposure Time-child ETcr 0.14 hr/da <br /> Conversion Factor from L to cm' CFL,.3 0.001 L/cm' <br /> NA=Not Applicable <br /> is\project\6000s\6447\6447.007%m stand alone doc\pea risk for surland.xls Page 9 of 18 <br />