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ATTACHMENT 3 <br /> HUMAN HEALTH SCREENING EVALUATION <br /> POMBO PROPERTY <br /> 1755 WEST 11TH STREET,TRACY,CALIFORNIA. <br /> PROJECT#7243.001 <br /> MAXIMUM CONC;GROUNDWATER NOT POTABLE <br /> INGESTION,DERMAL CONTACT AND INHALATION OF VOCs IN GROUNDWATER-Non-cancer <br /> Concentration Oral Chronic Inhalation <br /> Permeability Chronic Hazard <br /> ' Chemical Groundwater Constant (Kp) Reference Reference Quotient <br /> (Cw) Dose(RfDo) Dose(RfDi) <br /> (m ) (cm/hr) (m -d) (m -d) (--) <br /> Benzene ND 0.02 0.003 0.0017 ND <br /> Eth lbenzene ND 0.07 0.1 0.29 ND <br /> Toluene ND 0.05 0.2 0.11 ND <br /> X lenes,Total ND 0.08 2 2 ND <br /> Acenaphthene ND 0.09 0.06 0.06 ND <br /> Benzo(a)anthracene ND 0.81 NA. NA NA <br /> Chrysene ND 0.81 NA NA NA <br /> Fluoranthene ND 0.36 0.04 0.04 NA <br /> Fluorene ND 0.12 0.04 0.04 ND <br /> Naphthalene ND 1 0.07 1 0.02 1 0.00086 ND <br /> Phenanthrene ND 0.27 0.3 0.3 NA <br /> Pyrene ND 0.31 0.03 0.03 NA <br /> �...- 0.0E+00 <br /> CW x ]RW xIFxED <br /> Hazard" - ( °) x BW x AT x 365 day/yr + <br /> C. x IRw.voc x EF x ED <br /> (1/RfDt) x BW x.AT x 365 day/yr } <br /> Cw xSAxKp xETxEFxEDx (IU1000cm#) i <br /> (I/RfD°) x Bpi x AT x 365 days/yr <br /> Parameter Symbol Value Units <br /> Exposure Frequency EF 350 dV r <br /> Exposure Duration ED 6 yrs <br /> Body Weight BW 15 k <br /> Averaging Time-Non-cancer ATnc 6 yrs <br /> Intake Rate(water) IRw 1 L/d <br /> Intake Rate(inhalation) IRvoc 1 L/d <br /> Exposure Time ET 0.14 hr/d <br /> Surface Area SAswr 7200 cm2 <br /> Conversion Factor-L to cm3 CFj.ciii3 0.001 1 L/cml <br /> `r..r <br /> pombo_based on UCLs1HQ gw VOCs Page 12 of 18. <br />