Wisconsin Administrative Code
Department of Natural Resources
NR 400-499 - Environmental Protection - Air Pollution Control
Chapter NR 463 - National Emission Standards For Hazardous Air Pollutants For Metals Treating And Processing
Subchapter II - Secondary Aluminum Production
Section NR 463.166 - Equations for determining compliance
Current through August 26, 2024
(1) THC EMISSION LIMIT. The owner or operator of an emission unit subject to a THC emission limit shall use Equation 6 to determine compliance with the THC emission limit in s. NR 463.13:
where:
E is the emission rate of measured pollutant, kg/Mg (lb/ton) of feed
C is the measured volume fraction of pollutant, ppmv
MW is the molecular weight of measured pollutant, g/g-mole (lb/lb-mole): THC, as propane, has a molecular weight of 44.11
Q is the volumetric flow rate of exhaust gases, dscm/hr (dscf/hr)
K1 is the conversion factor, 1 kg/1,000 g (1 lb/lb)
K2 is the conversion factor, 1,000 L/m3 (1 ft3/ft3)
Mv is the molar volume, 24.45 L/g-mole (385.3 ft3/lb-mole)
P is the production rate, Mg/hr (ton/hr)
(2) PM, HCL AND D&F EMISSION LIMITS.
where:
E is the emission rate of PM or HCl, kg/Mg (lb/ton) of feed
C is the concentration of PM or HCl, g/dscm (gr/dscf)
Q is the volumetric flow rate of exhaust gases, dscm/hr (dscf/hr)
K1 is the conversion factor, 1 kg/1,000 g (1 lb/7,000 gr)
P is the production rate, Mg/hr (ton/hr)
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).
(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:
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)
(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).
(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.
where:
Ec PM is the mass-weighted PM emissions for the secondary aluminum processing unit
Eti PM is the measured PM emissions for individual emission unit i
Tti 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
where:
Ec HCI is the mass-weighted HCl emissions for the secondary aluminum processing unit
Eti HCI is the measured HCl emissions for individual emission unit i
where:
Ec D&F is the mass-weighted D&F emissions for the secondary aluminum processing unit
Eti D&F is the measured D&F emissions for individual emission unit i
