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Table 10 <br /> Calculation of Target Levels for Air <br /> (Commercra(/Industrial Worker Scenario and Construction Worker Scenario) <br /> Former Heinz Facility <br /> Tracy,California <br />' Contrriereial/Industria[Woiker Scenario <br /> CSFs Ca(care) RfDi Ca(noncarc) Target Level <br /> Constituent (mg/kg day)i (Ng/m) (mg/kg-day) (pg/-) (tiglin) <br />' Benzene 1 OOE-01 143E-01 i 70E-03 8 69E+00 1431-01 <br /> Toluene not applicable 1 10E-01 5 62E+02 562E+02 <br /> Ethylbenzene not applicable 2 90&01 1 48E+03 148E+03 <br /> Xylenes(Mixture) not applicable 2 OOE-01 1 02E+03 1 02E+03 <br /> Equations <br />' Ca(cart)= site-specific screening level,based on carcmogeruc effects <br /> Ca(noncarc)= site-specific screening level,based on noncarcinogeruc effects <br /> Target Level— minimum of Ca(care)and Ca(noncarc) <br /> Ca(cart,reg/m)=(1000µg/mg x Target Risk x BW x ATc)/(EF x ED x InhR x CSFi) <br /> Ca (noncarc,leg/ni)=(1000µg/mg x THI x BW x ATn)/[EF x ED x hihR x(1/RfDt)] <br /> Target Risk— 0000001 (dimensionless) (DTSC,1994) <br /> Target Hazard Index(THI)= 1 (dimensionless) (DTSC,1994) <br />' Body weight(BW)— 70 kg (USEPA,1989) <br /> Averaging time(ATc)= 25550 days (USEPA,1989) <br /> Averaging tune(ATn)= 9125 days (USEPA,1989) <br /> Exposure frequency(EF)= 250 days/yr (USEPA,1991) <br /> Exposure duration(ED)= 25 yrs (USEPA,1991) <br /> Inhalation rate(InhR)= 20 m3/day (USEPA,1991) <br /> CSF1= inhalation slope factor(chemical specific) (California EPA,1994) <br /> RfDi= inhalation reference dose(chemical specific) (USEPA Region 9,1999) <br />' Construction Worker Scenario <br /> CSF- Ca(care) RfDi Ca(noncarc) Target Level <br />' Constituent (mg/kgday)r (Ng/m) (nWkg-day) (win) (Pa.) <br /> Benzene 1 OOE-01 179E+02 1 70E-03 4 34E+02 1 79E+02 <br /> Toluene not applicable 1 10E-01 2 81E+04 2 81E+04 <br />' Ethylbenzene not applicable 290E-0l 741E+04 741E+04 <br /> Xylenes(Mixture) not applicable 2 OOE-01 511E+04 511E+04 <br /> Equations <br /> Ca(care)= site-specific screening level,based on carcinogenic effects <br /> Ca(noncarc)= site-specific screening level,based on noncarcmogemc effects <br />' Target Level= minimum of Ca(care)and Ca(noncarc) <br /> Ca(care,µg/m3)=(1000 gg/mg x Target Risk x BW x ATc)/(EF x ED x InhR x CSF1) <br /> Ca (noncarc,µg/m3)=(10001ig/mg x THI x BW x ATn)/[EF x ED x hihR x(1/RfDi)] <br />' Target Risk= 0000001 (dimensionless) (DISC,1994) <br /> Target Hazard Index(T HI)= 1 (dimensionless) (DTSC,1994) <br /> Body weight(BW)= 70 kg (USEPA,1989) <br /> Averaging time(ATc)= 25550 days (USEPA,1989) <br /> Averaging tune(ATn)= 365 days (USEPA,1989) <br /> Exposure frequency(EF)= 5 days/yr (site-specific assumption) <br /> Exposure duration(ED)= 1 yrs (site-specific assumption) <br /> Inhalation rate(InhR)= 20 m3/day (USEPA,1991) <br /> CSFs= unhalation slope factor(chemical specific) (California EPA,1994) <br /> RfDi= inhalation reference dose(chemical specific) (USEPA Region 9,1999) <br /> 1 <br />