Wisconsin Administrative Code, Subchapter II, Section NR 463.13 - Emission standards for affected sources and emission units | Wisconsin Administrative Code

(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

Emission Standards for New and Existing Affected Sources

Affected source/ Emission Unit	Pollutant	Limit	Units
All new and existing affected sources and emission units that are controlled with a PM add-on control device and that choose to monitor with a COM; and all new and existing aluminum scrap shredders that choose to monitor with a COM or to monitor visible emissions	Opacity	10	percent
New and existing aluminum scrap shredder	PM	0.01	gr/dscf
New and existing thermal chip dryer	THC D&F a	0.80 2.50	lb/ton of feed µTEQ/Mg of feed
New and existing scrap dryer, delacquering kiln, or decoating kiln OR	PM HCl THC D&F a	0.08 0.80 0.06 0.25	lb/ton of feed lb/ton of feed lb/ton of feed µ TEQ/Mg of feed
Alternative limits if afterburner has a design residence time of at least 1 second and operates at a temperature of least 1400°F	PM HCl THC D&F a	0.30 1.50 0.20 5.0	lb/ton of feed lb/ton of feed lb/ton of feed µ TEQ/Mg of feed
New and existing sweat furnace	D&F a	0.80	ng TEQ/dscm @ 11% O2 b
New and existing dross-only furnace	PM	0.30	lb/ton of feed
New and existing in-line fluxer c	HCl PM	0.04 0.01	lb/ton of feed lb/ton of feed
New and existing inline fluxer with no reactive fluxing	No Limit	Work practice: no reactive fluxing
New and existing rotary dross cooler	PM	0.04	gr/dscf
New and existing clean furnace (Group 2)	No Limit	Work practices: clean charge only and no reactive fluxing
New and existing group 1 melting and holding furnace (processing only clean charge)c	PM HCl	0.80 0.40 or 10	lb/ton of feed lb/ton of feed percent of the HCl upstream of an add-on control device
New and existing group 1 furnace c	PM HCl	0.40 0.40 or 10	lb/ton of feed lb/ton of feed percent of the HCl upstream of an add-on control device
D&F a	15.0	µg TEQ/Mg of feed
New and existing group 1 furnace c with clean charge only	PM HCl D&F a	0.40 0.40 or 10 No Limit	lb/ton of feed lb/ton of feed percent of the HCl upstream of an add-on control device Clean charge only
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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.

(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:

(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).

(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.

(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:

(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.

(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.

(4) SCRAP DRYER, DELACQUERING KILN, DECOATING KILN. On and after the compliance date established by s. NR 463.115:

(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:

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.

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.

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.

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.

(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.

(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:

(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:

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.

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.

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.

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.

(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.

(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.

(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:

(a) Emissions in excess of 0.15 kg of PM per Mg (0.30 lb of PM per ton) of feed or charge.

(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.

(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:

(a) Emissions in excess of 0.09 g of PM per dscm (0.04 gr per dscf).

(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.

(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).

(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.

(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.

(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.

(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.

(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.

(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.

(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.

(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).

(a) 0.02 kg of HCl per Mg (0.04 lb of HCl per ton) of feed or charge.

(b) 0.005 kg of PM per Mg (0.01 lb of PM per ton) of feed or charge.

(c) The emission limits in pars. (a) and (b) do not apply to an in-line fluxer that uses no reactive flux materials.

(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.

(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.

(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.

(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:

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LtiPMis 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

Tti is the feed or charge rate for individual emission unit i

LcPMis the PM emission limit for the secondary aluminum processing unit

Note: In-line fluxers using no reactive flux materials cannot be included in this calculation since they are not subject to the PM limit.

(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:

See Image

where:

LtiHCIis 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

LcHCIis the HCl emission limit for the secondary aluminum processing unit

Note: In-line fluxers using no reactive flux materials cannot be included in this calculation since they are not subject to the HCl limit.

(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:

See Image

where:

LtiD&Fis the D&F emission limit for individual emission unit i in sub. (9) (c) for a group 1 furnace

LcD&Fis the D&F emission limit for the secondary aluminum processing unit

Note: Clean charge furnaces cannot be included in this calculation since they are not subject to the D&F limit.

(d) The owner or operator of a SAPU at a secondary aluminum production facility that is a major source may demonstrate compliance with the emission limits of pars. (a) to (c) by demonstrating that each emission unit within the SAPU is in compliance with the applicable emission limits of subs. (9) and (10).

(e) The owner or operator of a SAPU at a secondary aluminum production facility that is an area source may demonstrate compliance with the emission limits of par. (c) by demonstrating that each emission unit within the SAPU is in compliance with the emission limit of sub. (9) (c).

(f) With the prior approval of the department, an owner or operator may redesignate any existing group 1 furnace or in-line fluxer at a secondary aluminum production facility as a new emission unit. Any emission unit so redesignated may thereafter be included in a new SAPU at that facility. Any redesignation shall be solely for the purpose of this MACT standard and shall be irreversible.