Wisconsin Administrative Code
Department of Natural Resources
NR 400-499 - Environmental Protection - Air Pollution Control
Chapter NR 422 - Control Of Organic Compound EmissionsFrom Surface Coating, Printing And Asphalt Surfacing Operations
Section NR 422.05 - Can coating

Universal Citation: WI Admin Code ยง NR 422.05

Current through August 26, 2024

(1) APPLICABILITY.

(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:
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.

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.

(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.

(1m) EXEMPTIONS. The following exemptions are applicable to various provisions of this section:

(a) Subsection (3) does not apply to the stripping of cured coatings or cured inks.

(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.

(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.

(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.

(e) Subsection (3) (a), (d), (e), and (f) do not apply to digital printing.

(f) Subsection (3) (e) does not apply to cleaning with solvents or solvent solutions in spray bottles or containers described in sub. (3) (b) 2.

(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.

(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:

(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.

(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.

(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.

(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.

(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:

(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).

Table 1

VOC content Limits for Solvents and Solvent Solutions Used in Industrial Cleaning Operations

Cleaning Activity

VOC Content of Solvent or Solvent Solution in kilograms per liter (pounds per gallon)

1. Product cleaning or surface preparation during manufacturing process

0.05 (0.42)

2. Repair cleaning or maintenance cleaning

0.05 (0.42)

3. Cleaning of coatings (excluding adhesives) application equipment

a. General

0.05 (0.42)

b. Heptane-containing end sealant application equipment lines

0.70 (5.8)

4. Cleaning of ink application equipment

a. General

0.05 (0.42)

b. Metal can identification ink application equipment

0.89 (7.4)

(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:
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.

2. Closed containers or hand held spray bottles from which solvents or solvent solutions are applied without a propellant-induced force.

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.

4. A remote reservoir cleaner operated in compliance with all of the following requirements:
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.

b. Flow is directed in a manner that prevents solvent or solvent solution from splashing outside of the remote reservoir cleaner.

c. The cleaner is not used for cleaning porous or absorbent materials, such as cloth, leather, wood, or rope.

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.

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.

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.

(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.

(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:
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).

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).

(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).

(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.

Table 1A

VOC Composite Partial Vapor

Pressure for Solvents and Solvent Solutions Used in Industrial Cleaning Operations

Cleaning Activity

VOC Composite Partial Vapor Pressure for Solvents and Solvent Solutions in mm of Hg at 20°C

1. Product cleaning or surface preparation during manufacturing process

8.0

2. Repair cleaning or maintenance cleaning

8.0

3. Cleaning of coatings (excluding adhesives) application equipment

a. General

8.0

b. Heptane-containing end sealant application equipment lines

10.0

4. Cleaning of ink application equipment

8.0

(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:

(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.

(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.

(b) For each operation that is exempt under sub. (1m) (b), the daily quantity in gallons of VOC-containing solvents or solvent solutions used to clean sterilization indicating ink application equipment.

(c) For each operation that is subject to sub. (3), the following information as appropriate:
1. The name and identification of each cleaning material and the associated solvent cleaning activity.

2. The VOC content of each cleaning material, in pounds per gallon of material as employed, or the VOC composite partial vapor pressure of the solvents or solvent solutions used in industrial cleaning operations.

3. For any operation subject to sub. (3) (d), the results of any testing conducted as required under sub. (3) (d).

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