NR 463.12(37)
(37) “Sidewell" means an open well adjacent to the hearth of a furnace with connecting arches between the hearth and the open well through which molten aluminum is circulated between the hearth, where heat is applied by burners, and the open well, which is used for charging scrap and solid flux or salt to the furnace, injecting fluxing agents and skimming dross.
NR 463.12(38)
(38) “Sweat furnace" means a furnace used exclusively to reclaim aluminum from scrap that contains substantial quantities of iron by using heat to separate the low-melting point aluminum from the scrap while the higher melting-point iron remains in solid form.
NR 463.12(39)
(39) “TEQ" means the international method of expressing toxicity equivalents for dioxins and furans as defined 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 463.12(40)
(40) “THC" means total hydrocarbon emissions that also serve as a surrogate for the emissions of organic HAP compounds.
NR 463.12(41)
(41) “Thermal chip dryer" means a device that uses heat to evaporate oil or oil and water mixtures from unpainted or uncoated aluminum chips. Pre-heating boxes or other dryers which are used solely to remove water from aluminum scrap are not considered to be thermal chip dryers.
NR 463.12(42)
(42) “Three-day, 24-hour rolling average" means daily calculations of the average 24-hour emission rate in lb/ton of feed or charge over the 3 most recent consecutive 24-hour periods, for a secondary aluminum processing unit.
NR 463.12(43)
(43) “Total reactive chlorine flux injection rate" means the sum of the total weight of chlorine in the gaseous or liquid reactive flux and the total weight of chlorine in the solid reactive chloride flux, divided by the total weight of feed or charge, as determined by the procedure in
s. NR 463.163 (16)
NR 463.12 History
History: CR 04-023: cr.
Register December 2008 No. 636, eff. 1-1-09.
NR 463.13
NR 463.13 Emission standards for affected sources and emission units. NR 463.13(1)
(1)
Summary. The owner or operator of a new or existing affected source shall comply with each applicable limit in this section. The following table summarizes the emission standards for each type of source:
Table 1
Table 1 (Continued)
a D&F limit applies to a unit at a major or area source.
b Sweat furnaces equipped with afterburners meeting the specifications of
s. NR 463.13 (6) are not required to conduct a performance test.
c These limits are also used to calculate the limits applicable to secondary aluminum processing units.
d Equation definitions:
LiPM is the PM emission limit for individual emission unit i in the secondary aluminum processing unit [kg/Mg (lb/ton) of feed]
Ti is the feed rate for individual emission unit i in the secondary aluminum processing unit
LtPM is the overall PM emission limit for the secondary aluminum processing unit [kg/Mg (lb/ton) of feed]
LiHCl is the HCl emission limit for individual emission unit i in the secondary aluminum processing unit [kg/Mg (lb/ton) of feed]
LtHCl is the overall HCl emission limit for the secondary aluminum processing unit [kg/Mg (lb/ton) of feed]
Li D&F is the D&F emission limit for individual emission unit i [mg TEQ/Mg (gr TEQ/ton) of feed]
Lt D&F is the overall D&F emission limit for the secondary aluminum processing unit [mg TEQ/Mg (gr TEQ/ton) of feed]
n is the number of units in the secondary aluminum processing unit
e In-line fluxers using no reactive flux materials cannot be included in this calculation since they are not subject to the PM limit.
f In-line fluxers using no reactive flux materials cannot be included in this calculation since they are not subject to the HCl limit.
g Clean charge furnaces cannot be included in this calculation since they are not subject to the D&F limit.
NR 463.13(2)
(2) Aluminum scrap shredder. On and after the compliance date established by
s. NR 463.115, the owner or operator of an aluminum scrap shredder at a secondary aluminum production facility that is a major source may not discharge or cause to be discharged to the atmosphere either of the following:
NR 463.13(2)(a)
(a) Emissions in excess of 0.023 grams of PM per dry standard cubic meter (0.010 grain of PM per dry standard cubic foot).
NR 463.13(2)(b)
(b) Visible emissions in excess of 10% opacity from any PM add-on air pollution control device if a continuous opacity monitor (COM) or visible emissions monitoring is chosen as the monitoring option.
NR 463.13(3)
(3) Thermal chip dryer. On and after the compliance date established by
s. NR 463.115, the owner or operator of a thermal chip dryer may not discharge or cause to be discharged to the atmosphere emissions in excess of either of the following:
NR 463.13(3)(a)
(a) 0.40 kilogram (kg) of THC, as propane, per megagram (Mg) (0.80 lb of THC, as propane, per ton) of feed or charge from a thermal chip dryer at a secondary aluminum production facility that is a major source.
NR 463.13(3)(b)
(b) 2.50 micrograms (
mg) of D&F TEQ per Mg (3.5 x 10
-5 gr per ton) of feed or charge from a thermal chip dryer at a secondary aluminum production facility that is a major or area source.
NR 463.13(4)
(4) Scrap dryer, delacquering kiln, decoating kiln. On and after the compliance date established by
s. NR 463.115:
NR 463.13(4)(a)
(a) The owner or operator of a scrap dryer, delacquering kiln or decoating kiln may not discharge or cause to be discharged to the atmosphere emissions in excess of any of the following:
NR 463.13(4)(a)1.
1. 0.03 kg of THC, as propane, per Mg (0.06 lb of THC, as propane, per ton) of feed or charge from a scrap dryer, delacquering kiln or decoating kiln at a secondary aluminum production facility that is a major source.
NR 463.13(4)(a)2.
2. 0.04 kg of PM per Mg (0.08 lb per ton) of feed or charge from a scrap dryer, delacquering kiln or decoating kiln at a secondary aluminum production facility that is a major source.
NR 463.13(4)(a)3.
3. 0.25
mg of D&F TEQ
per Mg (3.5 x 10
-6 gr of D&F TEQ per ton) of feed or charge from a scrap dryer, delacquering kiln or decoating kiln at a secondary aluminum production facility that is a major or area source.
NR 463.13(4)(a)4.
4. 0.40 kg of HCl per Mg (0.80 lb per ton) of feed or charge from a scrap dryer, delacquering kiln or decoating kiln at a secondary aluminum production facility that is a major source.
NR 463.13(4)(b)
(b) The owner or operator of a scrap dryer, delacquering kiln or decoating kiln at a secondary aluminum production facility that is a major source may not discharge or cause to be discharged to the atmosphere visible emissions in excess of 10% opacity from any PM add-on air pollution control device if a COM is chosen as the monitoring option.
NR 463.13(5)
(5) Scrap dryer, delacquering kiln and decoating kiln: alternative limits. The owner or operator of a scrap dryer, delacquering kiln or decoating kiln may choose to comply with the emission limits in this subsection as an alternative to the limits in
sub. (4) if the scrap dryer, delacquering kiln or decoating kiln is equipped with an afterburner having a design residence time of at least one second and the afterburner is operated at a temperature of at least 760
°C (1400
°F) at all times. On and after the compliance date established by
s. NR 463.115:
NR 463.13(5)(a)
(a) The owner or operator of a scrap dryer, delacquering kiln or decoating kiln may not discharge or cause to be discharged to the atmosphere emissions in excess of any of the following:
NR 463.13(5)(a)1.
1. 0.10 kg of THC, as propane, per Mg (0.20 lb of THC, as propane, per ton) of feed or charge from a scrap dryer, delacquering kiln or decoating kiln at a secondary aluminum production facility that is a major source.
NR 463.13(5)(a)2.
2. 0.15 kg of PM per Mg (0.30 lb per ton) of feed or charge from a scrap dryer, delacquering kiln or decoating kiln at a secondary aluminum production facility that is a major source.
NR 463.13(5)(a)3.
3. 5.0 mg of D&F TEQ per Mg (7.0 x 10
-5 gr of D&F TEQ per ton) of feed or charge from a scrap dryer, delacquering kiln or decoating kiln at a secondary aluminum production facility that is a major or area source.
NR 463.13(5)(a)4.
4. 0.75 kg of HCl per Mg (1.50 lb per ton) of feed or charge from a scrap dryer, delacquering kiln or decoating kiln at a secondary aluminum production facility that is a major source.
NR 463.13(5)(b)
(b) The owner or operator of a scrap dryer, delacquering kiln or decoating kiln at a secondary aluminum production facility that is a major source may not discharge or cause to be discharged to the atmosphere visible emissions in excess of 10% opacity from any PM add-on air pollution control device if a COM is chosen as the monitoring option.
NR 463.13(6)
(6) Sweat furnace. On and after the compliance date established by
s. NR 463.115, the owner or operator of a sweat furnace at a secondary aluminum production facility that is a major or area source may not discharge or cause to be discharged to the atmosphere emissions in excess of 0.80 nanogram (ng) of D&F TEQ per dscm (3.5 x 10
-10 gr per dscf) at 11% oxygen. A performance test is not required under
s. NR 463.163 (6) to demonstrate compliance with this emission standard provided that the owner or operator operates and maintains an afterburner with a design residence time of 0.8 seconds or greater and an operating temperature of 1600
°F or greater.
NR 463.13(7)
(7) Dross-only furnace. On and after the compliance date established by
s. NR 463.115, the owner or operator of a dross-only furnace at a secondary aluminum production facility that is a major source may not discharge or cause to be discharged to the atmosphere either of the following:
NR 463.13(7)(a)
(a) Emissions in excess of 0.15 kg of PM per Mg (0.30 lb of PM per ton) of feed or charge.
NR 463.13(7)(b)
(b) Visible emissions in excess of 10% opacity from any PM add-on air pollution control device if a COM is chosen as the monitoring option.
NR 463.13(8)
(8) Rotary dross cooler. On and after the compliance date established by
s. NR 463.115, the owner or operator of a rotary dross cooler at a secondary aluminum production facility that is a major source may not discharge or cause to be discharged to the atmosphere either of the following:
NR 463.13(8)(a)
(a) Emissions in excess of 0.09 g of PM per dscm (0.04 gr per dscf).
NR 463.13(8)(b)
(b) Visible emissions in excess of 10% opacity from any PM add-on air pollution control device if a COM is chosen as the monitoring option.
NR 463.13(9)
(9) Group 1 furnace. The owner or operator of a group 1 furnace shall use the limits in this subsection to determine the emission standards for a SAPU under
sub. (11).
NR 463.13(9)(a)
(a) 0.20 kg of PM per Mg (0.40 lb of PM per ton) of feed or charge from a group 1 furnace, that is not a melting and holding furnace processing only clean charge, at a secondary aluminum production facility that is a major source.
NR 463.13(9)(b)
(b) 0.40 kg of PM per Mg (0.80 lb of PM per ton) of feed or charge from a group 1 melting and holding furnace processing only clean charge at a secondary aluminum production facility that is a major source.
NR 463.13(9)(c)
(c) 15
mg of D&F TEQ per Mg (2.1 x 10
-4 gr of D&F TEQ per ton) of feed or charge from a group 1 furnace at a secondary aluminum production facility that is a major or area source. This limit does not apply if the furnace processes only clean charge.
NR 463.13(9)(d)
(d) 0.20 kg of HCl per Mg (0.40 lb of HCl per ton) of feed or charge or, if the furnace is equipped with an add-on air pollution control device, 10% of the uncontrolled HCl emissions, by weight, for a group 1 furnace at a secondary aluminum production facility that is a major source.
NR 463.13(9)(e)
(e) The owner or operator of a group 1 furnace at a secondary aluminum production facility that is a major source may not discharge or cause to be discharged to the atmosphere visible emissions in excess of 10% opacity from any PM add-on air pollution control device if a COM is chosen as the monitoring option.
NR 463.13(9)(f)
(f) The owner or operator may determine the emission standards for a SAPU by applying the group 1 furnace limits on the basis of the aluminum production weight in each group 1 furnace, rather than on the basis of feed or charge.
NR 463.13(9)(g)
(g) The owner or operator of a sidewell group 1 furnace that conducts reactive fluxing, except for cover flux, in the hearth, or that conducts reactive fluxing in the sidewell at times when the level of molten metal falls below the top of the passage between the sidewell and the hearth, shall comply with the emission limits of
pars. (a) to
(d) on the basis of the combined emissions from the sidewell and the hearth.
NR 463.13(10)
(10) In-line fluxer. Except as provided in
par. (c) for an in-line fluxer using no reactive flux material, the owner or operator of an in-line fluxer shall use the limits in this subsection to determine the emission standards for a SAPU under
sub. (11).
NR 463.13(10)(a)
(a) 0.02 kg of HCl per Mg (0.04 lb of HCl per ton) of feed or charge.
NR 463.13(10)(b)
(b) 0.005 kg of PM per Mg (0.01 lb of PM per ton) of feed or charge.
NR 463.13(10)(c)
(c) The emission limits in
pars. (a) and
(b) do not apply to an in-line fluxer that uses no reactive flux materials.
NR 463.13(10)(d)
(d) The owner or operator of an in-line fluxer at a secondary aluminum production facility that is a major source may not discharge or cause to be discharged to the atmosphere visible emissions in excess of 10% opacity from any PM add-on air pollution control device used to control emissions from the in-line fluxer, if a COM is chosen as the monitoring option.
NR 463.13(10)(e)
(e) The owner or operator may determine the emission standards for a SAPU by applying the in-line fluxer limits on the basis of the aluminum production weight in each in-line fluxer, rather than on the basis of feed or charge.
NR 463.13(11)
(11) Secondary aluminum processing unit. On and after the compliance date established by
s. NR 463.115, the owner or operator shall comply with the emission limits calculated using the equations for PM and HCl in
pars. (a) and
(b) for each secondary aluminum processing unit at a secondary aluminum production facility that is a major source. The owner or operator shall comply with the emission limit calculated using the equation for D&F in
par. (c) for each secondary aluminum processing unit at a secondary aluminum production facility that is a major or area source.
NR 463.13(11)(a)
(a) The owner or operator may not discharge or allow to be discharged to the atmosphere any 3-day, 24-hour rolling average emissions of PM in excess of:
where:
-
See PDF for diagram 
is the PM emission limit for individual emission unit i in
sub. (9) (a) and
(b) for a group 1 furnace or in
sub. (10) (b) for an in-line fluxer
NR 463.13 Note
Note: In-line fluxers using no reactive flux materials cannot be included in this calculation since they are not subject to the PM limit.
NR 463.13(11)(b)
(b) The owner or operator may not discharge or allow to be discharged to the atmosphere any 3-day, 24-hour rolling average emissions of HCl in excess of:
where:
-
See PDF for diagram is the HCl emission limit for individual emission unit i in
sub. (9) (d) for a group 1 furnace or in
sub. (10) (a) for an in-line fluxer
NR 463.13 Note
Note: In-line fluxers using no reactive flux materials cannot be included in this calculation since they are not subject to the HCl limit.
NR 463.13(11)(c)
(c) The owner or operator may not discharge or allow to be discharged to the atmosphere any 3-day, 24-hour rolling average emissions of D&F in excess of:
where:
-
See PDF for diagram is the D&F emission limit for individual emission unit i in
sub. (9) (c) for a group 1 furnace
