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ATTACI-IMENT 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 /> 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) (--) (mg/k -d)" (--)
<br /> Benzene ND 0.1 0,1 ND
<br /> \9 1.3 0.1 NA NA
<br /> Toluene 7.5 0.1 NA NA
<br /> Xylenes,Total 3.4 0.1 NA NA
<br /> Acenaphthene 0.76 0.15 NA NA
<br /> Benzo(a)anthracene 0.13 0.15 1.2 6.8E-07
<br /> Chrysene 0.54 0.15 0.12 2.8E-07
<br /> Fluoranthene 0.098 0.15 NA NA
<br /> Fluorcne. 3.9 0.15 NA NA
<br /> Na hthalcne 3.3 0.15 NA NA
<br /> Phenanthrene 5.1 0.15 NA NA
<br /> Pyrene 0.27 0.15 NA NA
<br /> IE-06
<br /> +�.. Risk,,;, = SF, x C, x IR aduh x EF X EDod.,t x 10.6 kg/mg
<br /> BW.,.,, x AT x 365 days/yr
<br /> + SFo xC, x IR,.,,,x EF x ED,,, x 10'kg/mg,
<br /> BW,,,, x AT x 365 days/yr
<br /> SA.,, x AF x ABS x EF,d,,,x ED.,, x 10-6 kg/mg
<br /> +SF, x Cs X Blyad e x AT x 365 days/yr
<br /> + SF, x C, x SAh;,d 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 F-Fig 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 kg
<br /> Averaging Time-Cancer ATca 70 yrs
<br /> Ingestion Rate-adult IRsar 100 mg1d
<br /> Ingestion Rate-child IRscr 200. m d.
<br /> Exposure Frequency-dermal
<br /> contact/adult EFdc 100 d/yr
<br /> Exposure Frequency-Dermal
<br /> contact/child EFdc 350 d/yr
<br /> Surface Area-adult SAsar 5800 cm'
<br /> Surface Area-child SAscr 2000 cm2
<br /> Soil-to-Skin Adherence Factor AF ] I mg/cm,
<br /> Conversion Factor from mg to kg CF,,,g., IE-06 kg/mg
<br /> pombo_based on UCLs\risk soil Page 13 of 18
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