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ATTACHMENT 2 <br /> HUMAN HEALTH SCREENING EVALUATION <br /> POMBO PROPERTY <br /> 1755 WEST 11TH STREET,TRACY,CALIFORNIA <br /> PROJECT#7243.001 <br /> MAXIMUM CONC;GROUNDWATER POTABLE <br /> INGESTION OF AND DERMAL CONTACT WITH non-VOCs IN GROUNDWATER.-Non-cancer <br /> Concentration Permeability Oral Chronic <br /> Chemical Groundwater Constant Reference Hazard <br /> (Cw) (Kp) Dose (RfDo) Quotient <br /> (m ) (cm/hr) (m -d) (--) <br /> Benzene 0.0006 0.02 0.003 NA <br /> Eth lbenzene 0.0016 0.07 0.1 NA <br /> Toluene 0.0026 0.05 0.2 NA <br /> Xylenes,Total 0.004 0.08 2 NA <br /> Acenaphthene ND 0.04 0.06 1 NA <br /> Benzo(a)anthracene ND 0.81 NA ND <br /> Chrysene ND 0.81 NA ND <br /> Fluoranthene ND 0.36 0.04 ND <br /> Fluorene 0.0002 0.12 0.04 NA <br /> Naphthalene ND 0.07 0.02 NA <br /> Phenanthrene 0.0003 0.27 0.3 8.1E-05 <br /> Pyrene ND 0.31 0.03 ND <br /> \..� 8.1E-05 <br /> Hazard. = (1/110e C,, x IR., x EF x ED <br /> ) x BW x AT x 365 day/yr + I <br /> CW x SA x Kr x ET x EF,x ED x (1U1000Cm3) <br /> 1 (I/RtD°) x BW x AT x 365 day/yr <br /> Parameter Symbol Value Units <br /> Exposure Frequency EF 350 d/yr <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 Ud <br /> Surface Area. SAswr 7200 cm2 <br /> Exposure Time ETcr 0.14 hr/d <br /> Conversion Factor-L to cm3 CFS-cm3 0.001 Ucm3 <br /> pombo_based on UCLs1FIQ gw non-VOCs Page 11 of 18 <br />