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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 /> DERMAL CONTACT AND INCIDENTAL INGESTION OF SOIL-Non-cancer <br /> Concentration Absorption Oral ChronicHazard <br /> Chemical Reference <br /> Soil(Cs) Fractions Soil Quotient <br /> (ABSds) Dose(RtDo) <br /> Benzene ND 0.1 0.003 ND <br /> Eth ylbenzene 1.3 0.1 0.1 3.3E-04 <br /> Toluene 7.5 0.1 0.2 9.6E-04 <br /> Xylenes,Total 3.4 0.1 2 4.3E-05 <br /> Acenaphthene 0.76 0.15 0.06 4.0E-04 <br /> Benzo(a)anthracene 0.13 0.15 NA NA <br /> Chrvsene 0.54 0.15 NA NA <br /> Fluoranthene 0.098 0.15 0.04 7.8E-05 <br /> i Ruorene 3.9 0.15 0.04 3.1E-03 <br /> Naphthalene 3.3 0.15 0.02. 5.313-03 <br /> Phenanthrene 5.1 0.15 0.3 5.4E-04 <br /> Pyrene 0.27 0.15 0.03 2.9E-04 <br /> 1E-02 <br /> Hazard,�;, _ (1/RfDo) x C=x IR,x EF x ED x 10'6 kg/mg <br /> BW x AT x 365 day/yr <br /> + (1/RfD.) x C,.x SA x AF x ABS x EF.x ED x 10'6 kg/mg <br /> BW x AT x 365 days/yr <br /> Parameter Symbol Values Units <br /> Exposure Frequency-ingestion EFig 350 d/yr <br /> Exposure Duration ED 6 yrs <br /> Body Weight BW 15 k <br /> Averaging Time-Non-cancer ATnc 6 yrs <br /> Ingestion Rate IRs 200 m d <br /> Surface Area SAs 2000 cm2 <br /> Soil-to-Skin Adherence Factor AF I mg/cc? <br /> Exposure Frequency-dermal contact EFdc 350 d/ r <br /> Conversion Factor from mg to kg. CF,,,_k 1E-06 kg/mg <br /> pombo_based on UCLs1I-IQ soil Page 14 of 18 <br />