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APPENDIX A-11 <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-Non-cancer <br /> ' Concentration Permeability Oral Chronic <br /> Average Daily Hazard <br /> Chemical Groundwater Constant Reference <br /> (Cw) (Kp) Dose Dose (RfDo) Quotient <br /> m (cm/hr) ((mg/kg-d m -d <br /> L0.0002 0.81 2.3E-OS 0.03 7.7E-04 <br /> ene 0.00005 0.36 4.4E-06 0.04 1.1E-04 <br /> ene 0.0014 0.27 I.IE-04 004 2.8E-03 <br /> 0.0003 0.31 2.5E-OS 0.03 8.4E-04 <br /> ' 4.6E-03 <br /> w ( °) Cw x1Rw xEFxEp <br /> Hazed = 1/RtD x BW x AT x 365 day/yr + <br /> Cw xSAxKP xETxEFxEDx (IL/IOOOcm') <br /> (1/RfD°) x BW x AT x 365 day/yr <br /> Parameter Symbol Value Units <br /> ' <br /> Expos Frequency EF 350 d/yr <br /> Exposure Duration ED 6 yrs <br /> Body Weight BW 15 k <br /> ' <br /> Averaging Time-Non-cancer ATnc 6 yrs <br /> Intake Rate water IRw 1 L/d <br /> Surface Area SAswr 7200 cmZ <br /> Ex osure Time ETcr 0.14 hr/d <br /> Conversion Factor-L to cm' CFi_m; 0.001 L/cm3 <br /> NA=Not Applicable <br /> is\project\6000s\644T6447.007\hra stand alone doc\pea risk for surland.xls Page I1 of 18 <br />