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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 Risk VOCs <br /> (Cw) (SFi) <br /> (mom) (mg/kg-d)'t (—) <br /> 0E+00 <br /> RisSF, x C. x IRvoc.admi x EF x ED,, <br /> kvoc.w,��, - Riskw„«+ BW aaw, x AT x 365days/yr <br /> SF, x C,,, x IRvoc.chad x EF x ED,h,m <br /> BW�h;,d x AT x 365 days/yr <br /> Parameter Symbol Values Units— <br /> Exposure <br /> nitsEx osure 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 <br /> Intake Rate-adult IRvocar 2 L/d <br /> Intake Rate-child IRvoccr I L/d <br /> NA=Not Applicable <br /> i:\project\6000s\6447\6447.007\hra stand alone doc\pea risk for surland.xls Page 10 of 18 <br />