Wisconsin Administrative Code
Department of Natural Resources
NR 400-499 - Environmental Protection - Air Pollution Control
Chapter NR 440 - Standards of performance for new stationary sources
Subchapter II - Standards of Performance
Section NR 440.63 - Beverage can surface coating industry

1. "Beverage can" means any two-piece steel or aluminum container in which soft drinks or beer, including malt liquor, are packaged. The definition does not include containers in which fruit or vegetable juices are packaged.

2. "Exterior base coating operation" means the system on each beverage can surface coating line used to apply a coating to the exterior of a 2 piece beverage can body. The exterior base coat provides corrosion resistance and a background for lithography or printing operations. The exterior base coat operation consists of the coating application station, flashoff area and curing oven. The exterior base coat may be pigmented or clear (unpigmented).

3. "Inside spray coating operation" means the system on each beverage can surface coating line used to apply a coating to the interior of a two-piece beverage can body. This coating provides a protective film between the contents of the beverage can and the metal can body. The inside spray coating operation consists of the coating application station, flashoff area and curing oven. Multiple applications of an inside spray coating are considered to be a single coating operation.

4. "Overvarnish coating operation" means the system on each beverage can surface coating line used to apply a coating over ink which reduces friction for automated beverage can filling equipment, provides gloss and protects the finished beverage can body from abrasion and corrosion. The overvarnish coating is applied to two-piece beverage can bodies. The overvarnish coating operation consists of the coating application station, flashoff area and curing oven.

5. "Two-piece can" means any beverage can that consists of a body manufactured from a single piece of steel or aluminum and a top. Coatings for a two-piece can are usually applied after fabrication of the can body.

6. "VOC content" means all volatile organic compounds (VOCs) that are in a coating. VOC content is expressed in terms of kilograms of VOC per liter of coating solids.

1. Ca is the VOC concentration in each gas stream leaving the control device and entering the atmosphere (parts per million as carbon).

2. Cb is the VOC concentration in each gas stream entering the control device (parts per million as carbon).

3. Dc is the density of each coating, as received (kilograms per liter).

4. Dd is the density of each VOC-solvent added to coatings (kilograms per liter).

5. Dr is the density of VOC-solvent recovered by an emission control device (kilograms per liter).

6. E is the VOC destruction efficiency of the control device (fraction).

7. F is the proportion of total VOC emitted by an affected facility which enters the control device to total emissions (fraction).

8. G is the volume-weighted average of VOC in coatings assumed in a calendar month per volume of coating solids applied (kilograms per liter of coating solids).

9. He is the fraction of VOC emitted at the coater and flashoff areas captured by a collection system.

10. Hh is the fraction of VOC emitted at the cure oven captured by a collection system.

11. Lc is the volume of each coating consumed, as received (liters).

12. Ld is the volume of each VOC-solvent added to coatings (liters).

13. Lr is the volume of VOC-solvent recovered by an emission control device (liters).

14. Ls is the volume of coating solids consumed (liters).

15. Md is the mass of VOC-solvent added to coatings (kilograms).

16. Mo is the mass of VOC-solvent in coatings consumed, as received (kilograms).

17. Mr is the mass of VOC-solvent recovered by emission control device (kilograms).

18. N is the volume-weighted average mass of VOC emissions to atmosphere per unit volume of coating solids applied (kilograms per liter of coating solids).

19. Qa is the volumetric flow rate of each gas stream leaving the control device and entering the atmosphere (dry standard cubic meters per hour).

20. Qbis the volumetric flow rate of each gas stream entering the control device (dry standard cubic meters per hour).

21. R is the overall emission reduction efficiency for an affected facility (fraction).

22. Se is the fraction of VOC in coating and diluent VOC-solvent emitted at the coater and flashoff area for a coating operation.

23. Sh is the fraction of VOC in coating and diluent solvent emitted at the cure oven for a coating operation.

24. Vs is the proportion of solids in each coating, as received (fraction by volume).

25. Wo is the proportion of VOC in each coating, as received (fraction by weight).

1. The owner or operator shall use the following procedures for each affected facility that does not use a capture system and a control device to comply with the emission limit specified under sub. (3). The owner or operator shall determine the VOC-content of the coatings from formulation data supplied by the manufacturer of the coating or by an analysis of each coating as received, using Method 24 of 40 CFR part 60, Appendix A, incorporated by reference in s. NR 440.17(1). The department may require the owner or operator who uses formulation data supplied by the manufacturer of the coating to determine the VOC content of coatings using Method 24 or an equivalent or alternative method. The owner or operator shall determine from company records the volume of coating and the mass of VOC-solvent added to coatings. If a common coating distribution system serves more than one affected facility or serves both affected and existing facilities the owner or operator shall estimate the volume of coating used at each facility by using the average dry weight of coating, number of cans and size of cans being processed by each affected and existing facility or by other procedures acceptable to the department.

2. An owner or operator shall use the following procedures for each affected facility that uses a capture system and a control device that destroys VOC (e.g., incinerator) to comply with the emission limit specified under sub. (3):

3. An owner or operator shall use the following procedure for each affected facility that uses a capture system and a control device that recovers the VOC (e.g. carbon adsorber) to comply with the applicable emission limit specified under sub. (3).

1. Where only coatings which individually have a VOC content equal to or less than the limits specified under sub. (3) are used, and no VOC is added to the coating during the application or distribution process, the owner or operator shall provide a list of coatings used for each affected facility and the VOC content of each coating calculated from data determined using Method 24 of 40 CFR part 60, Appendix A, incorporated by reference in s. NR 440.17(1), or supplied by the manufacturers of the coatings.

2. Where one or more coating which individually have a VOC content greater than the limits specified under sub. (3) are used or where VOC are added or used in the coating process the owner or operator shall report for each affected facility the volume-weighted average of the total mass of VOC per volume of coating solids.

3. Where the compliance is achieved through the use of incineration the owner or operator shall include in the initial performance test required under s. NR 440.08(1) the combustion temperature (or the gas temperature upstream and downstream of the catalyst bed), the total mass of VOC per volume of coating solids before and after the incinerator, the capture efficiency and the destruction efficiency of the incinerator used to attain compliance with the applicable emission limit specified under sub. (3). The owner or operator shall also include a description of the method used to establish the amount of VOC captured by the capture system and sent to the control device.

1. Where compliance with sub. (3) is achieved through the use of thermal incineration, each 3-hour period when cans are processed, during which the average temperature of the device was more than 28°C below the average temperature of the device during the most recent performance test at which destruction efficiency was determined as specified under sub. (4).

2. Where compliance with sub. (3) is achieved through the use of catalytic incineration, each 3-hour period when cans are being processed, during which the average temperature of the device immediately before the catalyst bed is more than 28°C below the average temperature of the device immediately before the catalyst bed during the most recent performance test at which destruction efficiency was determined as specified under sub. (4) and all 3-hour periods, when cans are being processed, during which the average temperature difference across the catalyst bed is less than 80% of the average temperature difference across the catalyst bed during the most recent performance test at which destruction efficiency was determined as specified under sub. (5).

3. For thermal and catalytic incinerators, if no periods as described in subds. 1. and 2. occur, the owner or operator shall state this in the report.

1. Method 24, an equivalent or alternative method approved by the administrator, or manufacturer's formulation data from which the VOC content of the coatings used for each affected facility can be calculated. In the event of a dispute, Method 24 data shall govern. When VOC content of waterborne coatings, determined from data generated by Method 24, is used to determine compliance of affected facilities, the results of the Method 24 analysis shall be adjusted as described in section 12.6 of Method 24.

2. Method 25 or an equivalent or alternative method for the determination of the VOC concentration in the effluent gas entering and leaving the control device for each stack equipped with an emission control device. The owner or operator shall notify the department at least 30 days in advance when performing a test using Method 25. The following reference methods are to be used in conjunction with Method 25: