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ATTACHMENT 5
<br /> HUMAN HEALTH SCREENING EVALUATION
<br /> POMBO PROPERTY
<br /> �..r 1755 WEST 11TH STREET,TRACY,CALIFORNIA
<br /> E PROJECT#7243.001
<br /> 95%UCL;GROUNDWATER NOT POTABLE
<br /> DERMAL CONTACT AND INCIDENTAL INGESTION OF SOIL-Cancer
<br /> Chemical Concentration Absorption Oral Slope Excess Cancer
<br /> Soil(Cs) Fractions Soil Factor(SFo) Risk
<br /> (ABSds)
<br /> (mg/kg) (-) (m -d)"t (--}
<br /> Benzene ND 0.1 0.1 ND
<br /> \9 0.33 0.1 NA NA
<br /> Toluene 1.1 0.1 NA NA
<br /> Xylenes,Total 0.54 0.1 NA NA
<br /> Acenaphthene 0.17 0.15 NA NA
<br /> Benzo(a)anthracene 0.024 0.15 1.2 1.3E-07
<br /> Chrysene 0.13 0.15 0.12 6.8E-08
<br /> Fluoranthene 0.024 0.15 NA NA
<br /> Fluorene 0.63 0.15 NA NA
<br /> Naphthalene 0.5 0.15 NA NA
<br /> Phenanthrene 1.12 0.15 NA NA
<br /> P rene 0.07 0.15 NA NA
<br /> 213-07
<br /> Risk,,;, = SF, x C, x IR,:aduh x.EF x ED.,,,x 10'6 kg/ing
<br /> BW,,, x AT x 365 days/yr
<br /> IR,,,,x EF x ED,,,, x 10's kg/mg
<br /> + SF, x C, x BW,,,ja x AT x 365 days/yr
<br /> + SF, 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 /> SAcw,d x AF x ABS x EF,,,,,x ED,Hd x 10'6 kg/mg
<br /> + SF, x C,.x BW,hdd.x AT x 365 days/yr
<br /> Parameter Symbol Values Units
<br /> Ex sure Frequency-ingestion EFig 350 d/yr
<br /> Exposure Duration-adult EDar 24 yrs
<br /> Exposure Duration-child EDcr 6 yrs
<br /> Body Weight-adult BWar 70 kg.
<br /> Body Weight-child BWcr 15 k
<br /> Averaging Time-Cancer ATca 70 yrs
<br /> Ingestion Rate-adult IRsar 100 m /d
<br /> ingestion Rate-child IRscr 200 m d
<br /> Exposure Frequency-dermal
<br /> contact/adult EFdc 100 d!
<br /> Exposure Frequency-Dermal
<br /> contact/child EFdc 350 d/yr
<br /> Surface Area-adult SAsar 5800 cm2
<br /> Surface Area-child SAscr 2000 cm2
<br /> Soil-to-Skin Adherence Factor AF l me/cnt'`
<br /> Conversion Factor from mg to kg CFm_u 1E-06 kg/mg
<br /> pombo_based on UCLArisk soil Page 13 of 18
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