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1 <br /> Table 10 <br /> Calculation of Target Levels for Air <br /> (CommerctaVIndustrial Worker Scenario and Construction Worker Scenario) <br /> Former Heinz Facility <br /> Tracy,California <br />' Commercia(/Iredtrsfrm!Worker Scenario <br /> CSFs Ca(care) RfDi Ca(noncarc) Target Level <br /> Constituent (mg kg-day)i (Pere) (mg/kg-day) (Pe.) (Ng/in) <br />' Benzene 1 OOE-01 143&01 1 70E-03 8 69E+00 1431-01 <br /> Toluene not applicable I lOE-01 5 62E+02 5 62E+02 <br /> Ethylbenzene not applicable 2 9GE-01 1 48E+03 1 48E+03 <br /> Xylenes(Mixture) not applicable 2 OOE-01 1 02E+03 1 02E+03 <br /> 1 <br /> Equations <br />' Ca(cart)= site-specific screening level,based on carcutogemc effects <br /> Ca(noncarc)= stte-specific screening level,based on noncarcmogemc effects <br /> Target Level= mimmitm of Ca(care)and Ca(noncarc) <br /> Ca(cart,µg/m3)=(IWOµg/mg x Target Risk x BW x ATc)/(EF x ED x InhR x CSFs) <br />' Ca (noncarc,pg/m3)=(1000µg/mg x TI-I1 x BW x ATn)/[EF x ED x hihR x(1/RfDt)] <br /> Target Rask= 0000001 (dimensionless) (DTSC,1994) <br /> Target Hazard Index(THI)= 1 (dimensionless) (DTSC,1994) <br /> Body weight(BW)– 70 kg (USEPA,1989) <br /> Averaging tune(ATc)= 25550 days (USEPA,1989) <br /> Averaging time(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 xn/day (USEPA,1991) <br /> CSFi= inhalation slope factor(chemical specific) (California EPA,1994) <br /> RfDi= inhalation reference dose(chemical specific) (USEPA Region 9,1999) <br /> Construction Worker Scenario <br /> CSFt Ca(care) RfDt Ca(noncarc) Target Level <br />' Constituent (mg/kg-day)t (µg(-) (mg/kg-day) (Ng/-) (win) <br /> Benzene I OOE-01 179E+02 1 70E-03 4 34E+02 179E+02 <br /> Toluene not applicable 1 10E-01 2 81 E+04 2 SIE+04 <br />' Ethylbenzene not applicable 2 90E-01 7 41E+04 741E+04 <br /> Xylenes(Mixture) not applicable 2 ODE-01 511E+04 511E+04 <br />' Equations <br /> Ca(cart)= 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(carc)and Ca(noncarc) <br /> Ca(care,µg/m)=(1000µg/mg x Target Rask x BW x ATc)/(EF x ED x bihR.x CSFi) <br /> Ca (noncarc,µg/m)=(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 time(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 1113/day (USEPA,1991) <br /> CSFi= inhalation slope factor(cherrucal specific) (California EPA,1994) <br /> RfDi= inhalation reference dose(chemical specific) (USEPA Region 9,1999) <br />