i is the subscript denoting an individual coating
n is the number of different coatings subject to the same numerical emission limitation applied during any day on a coating line
Ci is the VOC content of each coating (i) as applied during any day on the coating line in kilograms per liter (pounds per gallon) of coating, excluding water
Vi is the volume of each coating (i), excluding water, as applied during any day on the coating line in liters (gallons)
VT is the total volume of all n coatings subject to the same emission limitation, excluding water, applied during any day on the coating line in liters (gallons)
NR 422.04(1)(b)
(b) No owner or operator of a printing line subject to an emission limitation contained in s.
NR 422.14 (2) (a) or
(b) and complying with the emission limitation by means of this subsection may cause, allow or permit the daily volume-weighted average VOC content to exceed the emission limitation to which the inks are subject:
where:
VOCB is the volume-weighted average VOC content of 2 or more inks applied on a printing line during any day in percent VOC by volume of the volatile fraction
i is the subscript denoting an individual ink
n is the number of different inks subject to the same emission limitation applied during any day on a printing line
Ci is the VOC content in percent VOC by volume of the volatile fraction in each ink (i) as applied
Li is the volume of each ink (i) as applied in liters (gallons)
VVFi is the volume fraction volatile content in each ink (i) as applied
where:
VOCC is the volume-weighted average VOC content of 2 or more inks applied on a printing line during any day in percent VOC by volume, excluding water
i is the subscript denoting an individual ink
n is the number of different inks subject to the same emission limitation applied during any day on a printing line
Ci is the VOC content of each ink (i) applied during any day on the printing line in percent VOC by volume, excluding water
Vi is the volume of each ink (i), excluding water, applied during any day on the printing line in liters (gallons)
VT is the total volume of all n inks subject to the same emission limitation, excluding water, applied during any day on the printing line in liters (gallons)
NR 422.04(1)(c)
(c) An owner or operator of a coating or printing line subject to an emission limitation in this chapter not specified in par.
(a) or
(b) may comply by means of this subsection only by obtaining prior department approval through an order issued under s.
285.13 (2), Stats., or through a permit. Any approval granted by the department under this paragraph shall be submitted to, and will not become effective for federal purposes until approved by, the administrator or designee as a source-specific revision to the department's state implementation plan for ozone.
NR 422.04(2)
(2) General methods. The surface coating or printing emission limitations shall be achieved by one of the following:
NR 422.04(2)(a)
(a) The application of low solvent content coating or ink technology.
NR 422.04(2)(b)
(b) A vapor recovery system which recovers the solvent for reuse.
NR 422.04(2)(c)
(c) Incineration or catalytic oxidation, provided that 90% of the nonmethane VOCs (VOC measured as total combustible carbon) which enter the incinerator or oxidation unit are oxidized to non-organic compounds.
NR 422.04(2)(d)
(d) An equivalent system or approach demonstrated to reliably control emissions to a level at or below the applicable emission limit and approved by the department. Any approval granted by the department under this paragraph shall be submitted to, and will not become effective for federal purposes until approved by, the administrator or designee as a source-specific revision to the department's state implementation plan for ozone.
NR 422.04(3)
(3) High transfer efficiency coating application. NR 422.04(3)(a)(a) Surface coating operations covered under ss.
NR 422.09 to
422.11 and
422.15 have the added option of achieving compliance with the emission limitation through the use of an alternative control method or system involving a high transfer efficiency coating application system, either when used alone or in conjunction with low solvent content coating technology.
NR 422.04(3)(b)
(b) Compliance under the option provided in this subsection must be approved by the department. This requires that all of the following conditions are met:
NR 422.04(3)(b)1.
1. The design, operation and efficiency of the application system must be certified in writing by the owner or operator and submitted to the department for approval.
NR 422.04(3)(b)2.
2. The solvent usage per coated part for application system must be less than or equal to the solvent usage per coated part at the applicable emission limitation using baseline transfer efficiency.
NR 422.04(3)(c)
(c) Each alternative control method or system approval granted by the department under this subsection shall be submitted to, and will not become effective for federal purposes until approved by, the administrator or designee as a source-specific revision to the department's state implementation plan for ozone.
NR 422.04(4)
(4) Capture systems. The design, operation and efficiency of any capture system used in conjunction with sub.
(2) (b),
(c) or
(d) shall be certified in writing by the owner or operator. The efficiency of the capture system is subject to approval by the department. For sources subject to an emission limitation under this chapter which is expressed in units of pounds VOC per gallon of coating or ink, excluding water, the efficiency of the capture system shall be great enough to insure that for any day either 95% overall control is achieved or the emissions from the controlled line are less than or equal to the amount determined using the following equation: -
See PDF for diagram 
where:
E is the total allowable daily emissions of VOCs in kilograms (pounds) from all coatings or inks subject to the same numerical emission limitation and applied on the controlled line
i is the subscript denoting an individual coating or ink
n is the number of different coatings or inks applied
Ai is the allowable emission rate for the coatings or inks pursuant to the requirements of this chapter in kilograms per liter (pounds per gallon) of coating or ink, excluding water, delivered to the applicator
Bi is the amount of coating material or ink in liters (gallons), delivered to the applicator during the actual production day
Ci is the volume fraction of solids in the coating or ink, delivered to the applicator during the actual production day
Di is the theoretical volume fraction of solids in the coating or ink necessary to meet the allowable emission rate pursuant to the requirements of this chapter calculated from:
where:
Pi is the density of the VOC used in the coating or ink delivered to the applicator during the actual production day in kilograms per liter (pounds per gallon). If the coating or ink does not contain any VOCs, or if the actual VOC density cannot be demonstrated by the owner or operator, a value of 0.88 kilograms per liter (7.36 pounds per gallon) shall be used for P.
NR 422.04 History
History: Renum. from NR 154.13 (4) (b) and am.
Register, September, 1986, No. 369, eff. 10-1-86; renum. (1) to (3) to be (2) to (4) and am. (3) (a), (b) (intro.) and 1. and (4), cr. (1) and (3) (c),
Register, February, 1990, No. 410, eff. 3-1-90; renum. (1) to be (1) (intro.) and am., cr. (1) (a) to (c), am. (2) (d) and (3) (c), r. and recr. (4),
Register, December, 1993, No. 456, eff. 1-1-94; am. (1) (a)
Register, August, 1994, No. 464, eff. 9-1-94; am. (4)
Register, June, 1995, No. 474, eff. 7-1-95
; am. (1) (a), (c), (2) (intro.), (d), and (3) (b) (intro.), (c),
Register, December, 1996, No. 492, eff. 1-1-97; am. (4),
Register, October, 1999, No. 526, eff. 11-1-99;
CR 00-174: am. (1) (a),
Register August 2001 No. 548, eff. 9-1-01; CR. 02-146: am. (2) (intro.) and (a)
Register October 2003 No. 574, eff. 11-1-03;
CR 20-088: am. (1) (a)
Register May 2022 No. 797, eff. 6-1-22.
NR 422.05(1)(a)(a) Subsections
(2) and
(4) apply to coating applicators and ovens of sheet, can or end coating lines involved in sheet basecoat (exterior and interior) and overvarnish; 2-piece can exterior (basecoat and overvarnish); 2- and 3-piece can interior body spray; 2-piece can exterior end (spray or roll coat); 3-piece can side-seam spray and end sealing compound operations at a facility that is either of the following:
NR 422.05(1)(a)1.
1. Located in the county of Brown, Calumet, Dane, Dodge, Door, Fond du Lac, Jefferson, Kenosha, Kewaunee, Manitowoc, Milwaukee, Ozaukee, Outagamie, Racine, Rock, Sheboygan, Walworth, Washington, Waukesha, or Winnebago and which has VOC emissions from all can coating lines at the facility, before consideration of controls, exceeding 6.8 kilograms (15 pounds) in any one day.
NR 422.05(1)(a)2.
2. Located outside of the counties of Brown, Calumet, Dane, Dodge, Door, Fond du Lac, Jefferson, Kenosha, Kewaunee, Manitowoc, Milwaukee, Ozaukee, Outagamie, Racine, Rock, Sheboygan, Walworth, Washington, Waukesha, and Winnebago and which has total VOC emissions from the facility, before consideration of controls, equal to or exceeding 100 tpy.
NR 422.05(1)(b)
(b) Except as provided in sub.
(1m), subs.
(3) and
(4) apply to a facility with coating operations as described in par.
(a) and which is located in the county of Kenosha, Milwaukee, Ozaukee, Racine, Sheboygan, Washington, or Waukesha if VOC emissions from all industrial cleaning operations, before consideration of controls, equal or exceed 3 tons per year on a 12 consecutive month rolling basis.
NR 422.05(1m)
(1m) Exemptions. The following exemptions are applicable to various provisions of this section:
NR 422.05(1m)(a)
(a) Subsection
(3) does not apply to the stripping of cured coatings or cured inks.
NR 422.05(1m)(b)
(b) Subsection
(3) (a) 4. in Table 1 does not apply to facilities using less than a total of 1.5 gallons per day of VOC-containing solvents and solvent solutions to clean sterilization indicating ink application equipment.
NR 422.05(1m)(c)
(c) Subsection
(3) (a) does not apply to cleaning conducted in conjunction with performance testing on coatings or inks, research and development programs, and quality assurance testing. This exemption is limited to the use of up to a total of 110 gallons of solvents and solvent solutions per year on a 12 consecutive month rolling basis.
NR 422.05(1m)(d)
(d) Subsection
(3) (a) and
(e) do not apply to cleaning with aerosol products if 160 fluid ounces or less of VOC-containing aerosol products are used per day for industrial cleaning operations per facility.
NR 422.05(1m)(g)
(g) Subsection
(3) (e) does not apply to the cleaning of the nozzle tips of automated spray equipment systems, except for robotic systems that are programmed to spray into a closed container.
NR 422.05(2)
(2) Emission limitations. No owner or operator of a can coating line may cause, allow or permit the emission of any VOCs in excess of:
NR 422.05(2)(a)
(a) 0.34 kilograms per liter of coating (2.8 pounds per gallon), excluding water, delivered to each coating applicator from sheet basecoat (exterior and interior) and overvarnish or 2-piece can exterior (basecoat and overvarnish) operations.
NR 422.05(2)(b)
(b) 0.51 kilograms per liter of coating (4.2 pounds per gallon), excluding water, delivered to each coating applicator from 2- and 3-piece can interior body spray and 2-piece can exterior end (spray or roll coat) operations.
NR 422.05(2)(c)
(c) 0.66 kilograms per liter of coating (5.5 pounds per gallon), excluding water, delivered to each coating applicator from 3-piece can side-seam spray operations.
NR 422.05(2)(d)
(d) 0.44 kilograms per liter of coating (3.7 pounds per gallon), excluding water, delivered to each coating applicator from end sealing compound operations.
NR 422.05(3)
(3) Industrial cleaning operations. Beginning on March 1, 2013, the owner or operator of a facility subject to this subsection shall meet the requirements of this subsection:
NR 422.05(3)(a)
(a)
Solvent and solvent solution requirements. Except as provided under par.
(d), no owner or operator of a facility may cause, allow or permit the use of a solvent or solvent solution for industrial cleaning operations unless the VOC content of the solvent or solvent solution is less than or equal to the applicable VOC content listed in Table 1 for the respective cleaning operation. For the purposes of this subsection, VOC content shall have the meaning given in s.
NR 423.02 (11r). -
See PDF for table NR 422.05(3)(b)
(b)
Cleaning devices and methods requirements. Except as provided under par.
(d), the owner or operator of a facility shall comply with the following requirements associated with the identified cleaning devices or methods when using solvents or solvent solutions:
NR 422.05(3)(b)1.
1. Physically rub a surface with a porous applicator such as a rag, paper, sponge, or a cotton swab moistened with solvent or solvent solution.
NR 422.05(3)(b)2.
2. Closed containers or hand held spray bottles from which solvents or solvent solutions are applied without a propellant-induced force.
NR 422.05(3)(b)3.
3. Cleaning equipment which has a solvent or solvent solution container that is closed during cleaning operations, except when depositing and removing objects to be cleaned, and is closed during non-operation with the exception of maintenance and repair to the cleaning equipment itself.
NR 422.05(3)(b)4.
4. A remote reservoir cleaner operated in compliance with all of the following requirements:
NR 422.05(3)(b)4.a.
a. Solvent vapors are prevented from escaping from the solvent or solvent solution container by using devices such as a cover or a valve when the remote reservoir is not being used, cleaned, or repaired.
NR 422.05(3)(b)4.b.
b. Flow is directed in a manner that prevents solvent or solvent solution from splashing outside of the remote reservoir cleaner.
NR 422.05(3)(b)4.c.
c. The cleaner is not used for cleaning porous or absorbent materials, such as cloth, leather, wood, or rope.
NR 422.05(3)(b)4.d.
d. Only solvent or solvent solution containers free of all liquid leaks are used. Auxiliary equipment, such as pumps, pipelines, or flanges, may not have any liquid leaks, visible tears, or cracks. Any liquid leak, visible tear, or crack detected shall be repaired within one calendar day, or the leaking section of the remote reservoir cleaner shall be drained of all solvents or solvent solutions and shut down until it is replaced or repaired.
NR 422.05(3)(b)5.
5. A non-atomized flow method where the used solvents or solvent solutions are collected in a container or a collection system which is closed, except for the solvent or solvent solution collection openings that may be open when filling or emptying, or the opening caused by use of a pressure relief valve.
NR 422.05(3)(b)6.
6. A flushing method where the used solvents or solvent solutions are discharged into a container which is closed, except for the solvent or solvent solution collection openings that may be open when filling or emptying, or the opening caused by use of a pressure relief valve. The discharged solvents or solvent solutions shall be collected into containers without atomizing into the open air.
NR 422.05(3)(c)
(c)
Storage, disposal, and transport. The owner or operator of a facility shall store all solvents or solvent solutions used in industrial cleaning operations in non-absorbent, non-leaking containers which shall be kept covered except when filling or emptying. Cloth and paper moistened with solvents or solvent solutions shall be stored in covered, non-absorbent, non-leaking containers. VOC-containing cleaning materials shall be conveyed in closed containers or pipes.
NR 422.05(3)(d)
(d)
Control equipment. In lieu of complying with the requirements in pars.
(a) and
(b), the owner or operator of a facility may use a VOC emission control system to control VOC emissions from the industrial cleaning operations at the facility provided one of the following requirements is met:
NR 422.05(3)(d)1.
1. The emission control system has a minimum overall emission reduction efficiency of 85% for VOC emissions, as determined in accordance with s.
NR 439.06 (3) (am).
NR 422.05(3)(d)2.
2. The emission control system has a minimum VOC capture efficiency of 90% and an output of VOC emissions of less than 50 ppm calculated as carbon, not including methane and ethane, with no dilution, as determined in accordance with s.
NR 439.06 (3) (a).
NR 422.05(3)(e)
(e)
General prohibitions. The owner or operator of a facility may not atomize any solvent or solvent solution unless the resulting VOC emissions are controlled by an air pollution control system that meets one of the requirements of par.
(d).
NR 422.05(3)(f)
(f)
Alternative compliance option. In lieu of complying with the requirements in par.
(a), the owner or operator of a facility may use solvents or solvent solutions for industrial cleaning operations which have a VOC composite partial vapor pressure that is less than or equal to the applicable VOC composite partial vapor pressure listed in Table 1A for the respective cleaning operation.
-
See PDF for table NR 422.05(4)
(4) Recordkeeping. In addition to the applicable recordkeeping requirements in s.
NR 439.04, the owner or operator of any can coating line shall collect and record the applicable information specified in this subsection. The information shall be maintained at the facility for a minimum of 5 years and shall be made available to a department representative at any time during normal working hours. The information required is:
NR 422.05(4)(a)
(a) For each operation that is exempt under sub.
(1m) (d), the daily quantity in fluid ounces of VOC-containing aerosol product used for industrial cleaning operations.
NR 422.05(4)(am)
(am) For each operation that is exempt under sub.
(1m) (c), the name, identification, and monthly quantity in gallons of VOC-containing solvent or solvent solutions used for industrial cleaning operations. In addition, monthly information demonstrating the exempt solvent or solvent solution is being used exclusively for performance testing on coatings or inks, research and development programs, or quality assurance testing.
