Wisconsin Administrative Code
Department of Natural Resources
NR 400-499 - Environmental Protection - Air Pollution Control
Chapter NR 469 - Emission standards for hazardous air pollutants for halogenated solvent cleaning operations
Section NR 469.073 - Control device and operational requirements for continuous web cleaning machines

Universal Citation: WI Admin Code § NR 469.073

Current through August 26, 2024

Except as provided in ss. NR 469.077 and 469.08 for remote reservoir continuous web cleaning machines, each owner or operator of a continuous web cleaning machine shall comply with subs. (1) to (4) for each continuous web cleaning machine.

(1) Except as provided in sub. (2), install, maintain and operate one of the following control combinations on each continuous web cleaning machine:

(a) For each existing continuous web cleaning machine, the following control combinations are allowed:

1. Superheated vapor or superheated part technology and a freeboard ratio of 1.0 or greater.

2. Freeboard refrigeration device and a freeboard ratio of 1.0 or greater.

3. Carbon adsorption system meeting the requirements of s. NR 469.06(2) (g).

(b) For each new continuous web cleaning machine, the following control combinations are allowed:

1. Superheated vapor or superheated part technology and a freeboard refrigeration device.

2. A freeboard refrigeration device and a carbon adsorber meeting the requirements of s. NR 469.06(2) (g).

3. Superheated vapor or superheated part technology and a carbon adsorber meeting the requirements of s. NR 469.06(2) (g).

(2) If a carbon adsorber system can be demonstrated to the department's satisfaction to have an overall solvent control efficiency (capture efficiency and removal efficiency) of 70% or greater, this system is equivalent to the options in this section.

(3) In lieu of complying with the provisions of s. NR 469.04(1), the owner or operator of a continuous web cleaning machine shall comply with the following provisions:

(a) Each cleaning machine shall meet one of the following control equipment or technique requirements:

1. An idling and downtime mode cover, as described in s. NR 469.05(1) (a), that may be readily opened or closed; that completely covers the cleaning machine openings when in place and is free of cracks, holes and other defects. A continuous web part that completely occupies an entry or exit port when the machine is idle is considered to meet this requirement.

2. A reduced room draft as described in s. NR 469.06(2) (b).

3. Gasketed or leakproof doors that separate both the continuous web part feed reel and take-up reel from the room atmosphere if the doors are checked according to the requirements of s. NR 469.06(2) (c).

4. A cleaning machine that is demonstrated to the department's satisfaction to be under negative pressure during idling and downtime and is vented to a carbon adsorption system that meets the requirements of either s. NR 469.06(2) (g) or sub. (2).

(b) Each continuous web cleaning machine shall have a freeboard ratio of 0.75 or greater unless that cleaning machine is a remote reservoir continuous web cleaning machine.

(c) Each cleaning machine shall have an automated parts handling system capable of moving parts or parts baskets at a speed of 3.4 meters per minute or less from the initial loading of parts through removal of cleaned parts, unless the cleaning machine is a continuous web cleaning machine that has a squeegee system or air knife system installed, maintained and operated on the continuous web cleaning machine meeting the requirements of s. NR 469.06.

(d) Each vapor cleaning machine shall be equipped with a device that shuts off the sump heat if the sump liquid solvent level drops to the sump heater coils. This requirement does not apply to a vapor cleaning machine that uses steam to heat the solvent.

(e) Each vapor cleaning machine shall be equipped with a vapor level control device that shuts off sump heat if the vapor level in the vapor cleaning machine rises above the height of the primary condenser.

(f) Each vapor cleaning machine shall have a primary condenser.

(g) Each cleaning machine that uses a lip exhaust or any other exhaust within the solvent cleaning machine shall be designed and operated to route all collected solvent vapors through a properly operated and maintained carbon adsorber that meets the requirements of either s. NR 469.06(2) (g) or sub. (2).

(4) In lieu of complying with the provisions of s. NR 469.05, the owner or operator of a continuous web cleaning machine shall comply with the following provisions:

(a) Control air disturbances across the cleaning machine openings by incorporating one of the following control equipment or techniques:

1. Covers to each solvent cleaning machine shall be in place during the idling mode and during the downtime mode unless either the solvent has been removed from the machine or maintenance or monitoring is being performed that requires the covers in place. A continuous web part that completely occupies an entry or exit port when the machine is idle is considered to meet this requirement.

2. A reduced room draft as described in s. NR 469.06(2) (b).

3. Gasketed or leakproof doors or covers that separate both the continuous web part feed reel and take-up reel from the room atmosphere if the doors are checked according to the requirements of s. NR 469.06(2) (c).

4. A cleaning machine that is demonstrated to the department's satisfaction to be under negative pressure during idling and downtime and is vented to a carbon adsorption system that meets either the requirements of s. NR 469.06(2) (g) or sub. (2).

(b) Any spraying operations shall be conducted in a section of the solvent cleaning machine that is not directly exposed to the ambient air, such as a baffled or enclosed area of the solvent cleaning machine, or within a machine having a door or cover that meets the requirements of par. (a) 3.

(d) During shutdown of each vapor cleaning machine, the sump heater shall be turned off and the solvent vapor layer allowed to collapse before the primary condenser is turned off.

(e) When solvent is added to or drained from any solvent cleaning machine, the solvent shall be transferred using threaded or other leak proof couplings, and the end of the pipe in the solvent sump shall be located beneath the liquid solvent surface.

(f) Each solvent cleaning machine and associated controls shall be maintained as recommended by the manufacturers of the equipment or using alternative maintenance practices that have been demonstrated to the department's satisfaction to achieve the same or better results as those recommended by the manufacturer.

(g) Waste solvent, still bottoms, sump bottoms and waste absorbent materials used in the cleaning process for continuous web cleaning machines shall be collected and stored in waste containers. The closed containers may contain a device that would allow pressure relief, but would not allow liquid solvent to drain from the container.

(h) Except as provided in par. (i), sponges, fabric, wood, and paper products may not be cleaned.

(i) The prohibition in par. (h) does not apply to absorbent materials that are used as part of the cleaning process of continuous web cleaning machines, including rollers and roller covers.

Disclaimer: These regulations may not be the most recent version. Wisconsin may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.

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