Chapter NR 468

Chapter NR 468

EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS
FOR MISCELLANEOUS PROCESSES

NR 468.01   Applicability; purpose.

NR 468.02   Definitions.

NR 468.20   Perchloroethylene dry cleaning facilities.

NR 468.30   Industrial process cooling towers.

Ch. NR 468 Note Note: Corrections made under s. 13.93 (2m) (b) 7., Stats., Register, March, 1997, No. 495.

NR 468.01 NR 468.01 Applicability; purpose.

NR 468.01(1) (1) Applicability. This chapter applies to miscellaneous sources of hazardous air pollutants including perchloroethylene dry cleaning, petroleum solvent dry cleaning, sterilization facilities and industrial process cooling towers, and to their owners and operators.

NR 468.01(2) (2) Purpose. This chapter is adopted under ss. 285.11, 285.13 and 285.27 (2), Stats., to establish source categories for sources of hazardous air pollutants and to establish emission standards for these source categories in order to protect air quality.

NR 468.01 Note Note: This chapter is based on federal regulations contained in 40 CFR part 63. Sections of this chapter correspond to the subparts of 40 CFR part 63 as follows:

NR 468.01 Note Section of this chapter   40 CFR part 63 subpart

NR 468.01 Note   NR 468.20   Subpart M as last revised on December 20, 1993

NR 468.01 Note   NR 468.30   Subpart Q as last revised on September 8, 1994

NR 468.01 History History: Cr. Register, June, 1995, No. 474, eff. 7-1-95; am. (1), Register, January, 1997, No. 493, eff. 2-1-97; am. (1), Register, March, 1997, No. 495, eff. 4-1-97.

NR 468.02 NR 468.02 Definitions. For terms not defined in this chapter, the definitions contained in chs. NR 400 and 460 apply to the terms used in this chapter, with definitions in ch. NR 460 taking priority over definitions in ch. NR 400. In addition, the definitions contained in individual sections of this chapter apply to the terms used in those sections. If a section gives a definition for a term which is also defined in ch. NR 400 or 460, the section’s definition applies within the section rather than the definition in ch. NR 400 or 460.

NR 468.02 History History: Cr. Register, June, 1995, No. 474, eff. 7-1-95; am. Register, March, 1997, No. 495, eff. 4-1-97.

NR 468.20 NR 468.20 Perchloroethylene dry cleaning facilities.

NR 468.20(1) (1) Applicability.

NR 468.20(1)(a) (a) The provisions of this section apply to the owner or operator of each dry cleaning facility that uses perchloroethylene.

NR 468.20(1)(b) (b) Each dry cleaning system that commences construction or reconstruction on or after December 9, 1991, shall be in compliance with the provisions of this section beginning on July 1, 1995 or immediately upon startup, whichever is later, except for dry cleaning systems constructed or reconstructed before September 22, 1993, which shall comply with sub. (3) (b) beginning on September 23, 1996, and shall comply with other provisions of this section by July 1, 1995.

NR 468.20(1)(c) (c) Each dry cleaning system that commenced construction or reconstruction before December 9, 1991, shall comply with subs. (3) (c), (d), (i), (j), (k), (L) and (m), (4) (d) and (5) (b), (d) 1. to 4. and (e) beginning on July 1, 1995, and shall comply with other provisions of this section by September 23, 1996.

NR 468.20(1)(d) (d) Each existing dry-to-dry machine and its ancillary equipment located in a dry cleaning facility that includes only dry-to-dry machines and each existing transfer machine system and its ancillary equipment, as well as each existing dry-to-dry machine and its ancillary equipment, located in a dry cleaning facility that includes both transfer machine systems and dry-to-dry machines is exempt from subs. (3), (4) and (5), except subs. (3) (c), (d), (i), (j), (k), (L) and (m), (4) (d) and (5) (b), (d) 1. to 4. and (e), if the total perchloroethylene consumption of the dry cleaning facility is less than 530 liters (140 gallons) per year. Consumption is determined according to sub. (4) (d).

NR 468.20(1)(e) (e) Each existing transfer machine system and its ancillary equipment located in a dry cleaning facility that includes only transfer machine systems is exempt from subs. (3), (4) and (5), except subs. (3) (c), (d), (i), (j), (k), (L), and (m), (4) (d) and (5) (b), (d) 1. to 4. and (e), if the perchloroethylene consumption of the dry cleaning facility is less than 760 liters (200 gallons) per year. Consumption is determined according to sub. (4) (d).

NR 468.20(1)(f) (f) If the total yearly perchloroethylene consumption of a dry cleaning facility determined according to sub. (4) (d) is initially less than the amounts specified in par. (d) or (e), but later exceeds those amounts, the existing dry cleaning systems in the dry cleaning facility must comply with subs. (3), (4) and (5) by 180 calendar days from the date that the facility determines it has exceeded the amounts specified, or by September 23, 1996, whichever is later.

NR 468.20(1)(g) (g) A dry cleaning facility is a major source if the facility emits or has the potential to emit more than 9.1 megagrams per year (10 tons per year) of perchloroethylene to the atmosphere. In lieu of measuring or determining a facility’s potential to emit perchloroethylene emissions, a dry cleaning facility is a major source in either of the following cases:

NR 468.20(1)(g)1. 1. If it includes only dry-to-dry machines and has a total yearly perchloroethylene consumption greater than 8,000 liters (2,100 gallons) as determined according to sub. (4) (d).

NR 468.20(1)(g)2. 2. If it includes only transfer machine systems or both dry-to-dry machines and transfer machine systems and has a total yearly perchloroethylene consumption greater than 6,800 liters (1,800 gallons) as determined according to sub. (4) (d).

NR 468.20(1)(h) (h) A dry cleaning facility is an area source if it does not meet the conditions of par. (g).

NR 468.20(1)(i) (i) If the total yearly perchloroethylene consumption of a dry cleaning facility determined according to sub. (4) (d) is initially less than the amounts specified in par. (g), but then exceeds those amounts, the dry cleaning facility becomes a major source and all dry cleaning systems located at that dry cleaning facility must comply with the appropriate requirements for major sources under subs. (3), (4) and (5) by 180 calendar days from the date that the facility determines it has exceeded the amount specified, or by September 23, 1996, whichever is later.

NR 468.20(1)(j) (j) All coin-operated dry cleaning machines are exempt from the requirements of this section.

NR 468.20(2) (2) Definitions. As used in this section, terms not defined in this subsection have the meanings given in ch. NR 400. In addition, the following definitions apply to the terms used in this section:

NR 468.20(2)(a) (a) “Ancillary equipment” means the equipment used with a dry cleaning machine in a dry cleaning system including, but not limited to, emission control devices, pumps, filters, muck cookers, stills, solvent tanks, solvent containers, water separators, exhaust dampers, diverter valves, interconnecting piping, hoses and ducts.

NR 468.20(2)(am) (am) “Area source” means any perchloroethylene dry cleaning facility that meets the conditions of sub. (1) (h).

NR 468.20(2)(b) (b) “Articles” mean clothing, garments, textiles, fabrics and leather goods that are dry cleaned.

NR 468.20(2)(bm) (bm) “Carbon adsorber” means a bed of activated carbon into which an air-perchloroethylene gas-vapor stream is routed and which adsorbs the perchloroethylene onto the carbon.

NR 468.20(2)(c) (c) “Colorimetric detector tube” means a glass tube, sealed prior to use, containing material impregnated with a chemical that is sensitive to perchloroethylene and designed to measure the concentration of perchloroethylene in air.

NR 468.20(2)(d) (d) “Construction”, for purposes of this section, means the on site fabrication, erection or installation of a dry cleaning system subject to this section.

NR 468.20(2)(dm) (dm) “Desorption” means regeneration of a carbon adsorber by removal of the perchloroethylene adsorbed on the carbon.

NR 468.20(2)(e) (e) “Diverter valve” means a flow control device that prevents room air from passing through a refrigerated condenser when the door of the dry cleaning machine is open.

NR 468.20(2)(em) (em) “Dry cleaning” means the process of cleaning articles using perchloroethylene.

NR 468.20(2)(f) (f) “Dry cleaning cycle” means the washing and drying of articles in a dry-to-dry machine or transfer machine system.

NR 468.20(2)(fm) (fm) “Dry cleaning facility” means an establishment with one or more dry cleaning systems.

NR 468.20(2)(g) (g) “Dry cleaning machine” means a dry-to-dry machine or each machine of a transfer machine system.

NR 468.20(2)(gm) (gm) “Dry cleaning machine drum” means the perforated container inside the dry cleaning machine that holds the articles during dry cleaning.

NR 468.20(2)(h) (h) “Dry cleaning system” means a dry-to-dry machine and its ancillary equipment or a transfer machine system and its ancillary equipment.

NR 468.20(2)(hm) (hm) “Dryer” means a machine used to remove perchloroethylene from articles by tumbling them in a heated air stream (see reclaimer).

NR 468.20(2)(i) (i) “Dry-to-dry machine” means a one-machine dry cleaning operation in which washing and drying are performed in the same machine.

NR 468.20(2)(im) (im) “Equivalent control device” means an equivalent emission control technology as determined by the administrator.

NR 468.20 Note Note: The procedure for making this determination is found under 40 CFR 63.325 as in effect on July 1, 1994.

NR 468.20(2)(j) (j) “Exhaust damper” means a flow control device that prevents the air-perchloroethylene gas-vapor stream from exiting the dry cleaning machine into a carbon adsorber before room air is drawn into the dry cleaning machine.

NR 468.20(2)(jm) (jm) “Existing” means a dry cleaning system on which construction or reconstruction commenced before December 9, 1991.

NR 468.20(2)(k) (k) “Filter” means a porous device through which perchloroethylene is passed to remove contaminants in suspension. Examples include, but are not limited to, lint filter (button trap), cartridge filter, tubular filter, regenerative filter, prefilter, polishing filter and spin disc filter.

NR 468.20(2)(km) (km) “Heating coil” means the device used to heat the air stream circulated from the dry cleaning machine drum, after perchloroethylene has been condensed from the air stream and before the stream reenters the dry cleaning machine drum.

NR 468.20(2)(L) (L) “Major source” means any dry cleaning facility that meets the conditions of sub. (1) (g).

NR 468.20(2)(Lm) (Lm) “Muck cooker” means a device for heating perchloroethylene-laden waste material to volatilize and recover perchloroethylene.

NR 468.20(2)(m) (m) “New” means a dry cleaning system on which construction or reconstruction commenced on or after December 9, 1991.

NR 468.20(2)(mm) (mm) “Perceptible leaks” mean any perchloroethylene vapor or liquid leaks that are obvious from any of the following:

NR 468.20(2)(mm)1. 1. The odor of perchloroethylene.

NR 468.20(2)(mm)2. 2. Visual observation, such as pools or droplets of liquid.

NR 468.20(2)(mm)3. 3. The detection of gas flow by passing the fingers over the surface of equipment.

NR 468.20(2)(n) (n) “Perchloroethylene consumption” means the total volume of perchloroethylene purchased based upon purchase receipts or other reliable measures.

NR 468.20(2)(nm) (nm) “Reclaimer” means a machine used to remove perchloroethylene from articles by tumbling them in a heated air stream (see dryer).

NR 468.20(2)(o) (o) “Reconstruction”, for purposes of this section, means replacement of a washer, dryer, or reclaimer; or replacement of any components of a dry cleaning system to such an extent that the fixed capital cost of the new components exceeds 50% of the fixed capital cost that would be required to construct a comparable new source.

NR 468.20(2)(om) (om) “Refrigerated condenser” means a vapor recovery system into which an air-perchloroethylene gas-vapor stream is routed and the perchloroethylene is condensed by cooling the gas-vapor stream.

NR 468.20(2)(p) (p) “Refrigerated condenser coil” means the coil containing the chilled liquid used to cool and condense the perchloroethylene.

NR 468.20(2)(pm) (pm) “Room enclosure” means a stationary structure that encloses a transfer machine system, and is vented to a carbon adsorber or an equivalent control device during operation of the transfer machine system.

NR 468.20(2)(q) (q) “Source”, for purposes of this section, means each dry cleaning system.

NR 468.20(2)(qm) (qm) “Still” means any device used to volatilize and recover perchloroethylene from contaminated perchloroethylene.

NR 468.20(2)(r) (r) “Transfer machine system” means a multiple-machine dry cleaning operation in which washing and drying are performed in different machines. Examples include, but are not limited to:

NR 468.20(2)(r)1. 1. A washer and dryers.

NR 468.20(2)(r)2. 2. A washer and reclaimers.

NR 468.20(2)(r)3. 3. A dry-to-dry machine and reclaimers.

NR 468.20(2)(rm) (rm) “Washer” means a machine used to clean articles by immersing them in perchloroethylene. This includes a dry-to-dry machine when used with a reclaimer.

NR 468.20(2)(s) (s) “Water separator” means any device used to recover perchloroethylene from a water-perchloroethylene mixture.

NR 468.20(3) (3) Standards.

NR 468.20(3)(a) (a) The owner or operator of each existing dry cleaning system shall comply with either subd. 1. or 2. and shall comply with subd. 3. if applicable.

NR 468.20(3)(a)1. 1. Route the air-perchloroethylene gas-vapor stream contained within each dry cleaning machine through a refrigerated condenser or an equivalent control device.