P is the production rate, Mg/hr (ton/hr)

NR 463.166(2)(b) (b) The owner or operator of an emission unit subject to a D&F emission limit shall use Equation 7A to determine compliance with the emission limit in s. NR 463.13:

´

(Equation 7A)

where:

E is the emission rate of D&F, mg/Mg (gr/ton) of feed;

C is the concentration of D&F, mg/dscm (gr/dscf);

Q is the volumetric flow rate of exhaust gases, dscm/hr (dscf/hr); and

P is the production rate, Mg/hr (ton/hr).

NR 463.166(3) (3) HCL percent reduction standard. The owner or operator of an emission unit subject to the HCl percent reduction standard shall use Equation 8 to determine compliance with the HCl percent reduction standard in s. NR 463.13:

´

(Equation 8)

where:

%R is the percent reduction of the control device

Li is the inlet loading of pollutant, kg/Mg (lb/ton)

Lo is the outlet loading of pollutant, kg/Mg (lb/ton)

NR 463.166(4) (4) Conversion of D&F measurements to TEQ units. To convert D&F measurements to TEQ units, the owner or operator shall use the procedures and equations in Interim Procedures for Estimating Risks Associated with Exposures to Mixtures of Chlorinated Dibenzo-p-Dioxins and -Dibenzofurans (CDDs and CDFs) and 1989 Update (EPA-625/3-89-016), incorporated by reference in s. NR 484.05 (12).

NR 463.166(5) (5) Secondary aluminum processing unit. The owner or operator of a secondary aluminum processing unit shall use the procedures in pars. (a) to (c) or the procedure in par. (d) to determine compliance with emission limits in s. NR 463.13 for a secondary aluminum processing unit.

NR 463.166(5)(a) (a) Use Equation 9 to compute the mass-weighted PM emissions for a secondary aluminum processing unit. Compliance is achieved if the mass-weighted emissions for the secondary aluminum processing unit (EcPM) is less than or equal to the emission limit for the secondary aluminum processing unit (LcPM calculated using Equation 1 in s. NR 463.13 (11)).

å

å

´

(Equation 9)

where:

is the mass-weighted PM emissions for the secondary aluminum processing unit

is the measured PM emissions for individual emission unit i

is the average feed rate for individual emission unit i during the operating cycle or performance test period

n is the number of emission units in the secondary aluminum processing unit

NR 463.166(5)(b) (b) Use Equation 10 to compute the aluminum mass-weighted HCl emissions for the secondary aluminum processing unit. Compliance is achieved if the mass-weighted emissions for the secondary aluminum processing unit (EcHCl) is less than or equal to the emission limit for the secondary aluminum processing unit (LcHCl) calculated using Equation 2 in s. NR 463.13 (11).

å

å

´

(Equation 10)

where:

is the mass-weighted HCl emissions for the secondary aluminum processing unit

is the measured HCl emissions for individual emission unit i

NR 463.166(5)(c) (c) Use Equation 11 to compute the aluminum mass-weighted D&F emissions for the secondary aluminum processing unit. Compliance is achieved if the mass-weighted emissions for the secondary aluminum processing unit is less than or equal to the emission limit for the secondary aluminum processing unit. The emission limit for the secondary aluminum processing unit (LcD&F) is calculated using Equation 3 in s. NR 463.13 (11).