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APPENDIX A-10 <br /> HUMAN HEALTH SCREENING EVALUATION <br /> SURLAND HOMES PROPERTY <br /> TRACY,CALIFORNIA <br /> PROJECT 6447.007 <br /> FINAL <br /> ' INHALATION OF VOCs in GROUNDWATER-Cancer <br /> Concentration Inhalation Excess Cancer <br /> Chemical Groundwater Slope Factor <br /> (Cw) (SFi) Risk VOCs <br /> ' (mom) (m -d)-' (—) <br /> 0E+00 <br /> ' <br /> kvoc,w.u. — Riskw.w,+ SF, x Cw x IRvoc:.,w, x EF x ED.,,a <br /> BW...,, x AT x 365days/yr <br /> ' SF, x Cw x IRvoc,.tiiid x EF x ED.,,, <br /> BW,,;,, x AT x 365 days/yr <br /> Parameter Symbol Values Units <br /> Exposure Frequency EF 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 s <br /> Intake Rate-adult IRvocar ? L/d <br /> ' Intake Rate-child IRvoccr 1 L/d <br /> NA=Not Applicable <br /> ' i:\project\6000s\6447\6447.007\hra stand alone doc\pea risk for surlandAs_ Page 10 of 18 <br />