Wisconsin Administrative Code, Chapter NR 469, Section NR 469.04 - Batch vapor and in-line cleaning machine standards | Wisconsin Administrative Code

(1) Except as provided in s. NR 469.08 for all cleaning machines, each owner or operator of a solvent cleaning machine subject to the provisions of this chapter shall ensure that each existing or new batch vapor or in-line solvent cleaning machine subject to the provisions of this chapter conforms to the design requirements specified in pars. (a) to (g). The owner of operator of a continuous web cleaning machine shall comply with the requirements of s. NR 469.073 or 469.077, as appropriate, in lieu of complying with this paragraph.

Note: Owners and operators of batch vapor and in-line cleaning machines should also refer to ss. NR 469.05 and 469.06.

(a) Each cleaning machine shall be designed or operated to meet one of the following requirements:

1. Equip the cleaning machine with 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.

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

(b) Each cleaning machine shall have a freeboard ratio of 0.75 or greater.

(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 (11 feet per minute) or less from the initial loading of parts through removal of cleaned parts.

(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 shall be designed and operated to route all collected solvent vapors through a properly operated and maintained carbon adsorber that meets the requirements of s. NR 469.06(2) (g).

(2) Except as provided in s. NR 469.08, each owner or operator of an existing or new batch vapor cleaning machine shall comply with either par. (a) or (b).

(a) Each owner or operator of a batch vapor cleaning machine with a solvent/air interface area of 1.21 square meters (13 square feet) or less shall comply with the requirements specified in either subd. 1. or 2.

1. Employ one of the control combinations listed in Table 1 or other equivalent methods of control determined using the procedures in sub. (4).

Table 1. Control Combinations for Batch Vapor Solvent Cleaning Machines With a Solvent/Air Interface Area of 1.21 Square Meters (13 Square Feet) or Less

Option	Control Combinations
1	Working-mode cover, freeboard ratio of 1.0, superheated vapor.
2	Freeboard refrigeration device, superheated vapor.
3	Working-mode cover, freeboard refrigeration
device.
4	Reduced room draft, freeboard ratio of 1.0, superheated vapor.
5	Freeboard refrigeration device, reduced room draft.
6	Freeboard refrigeration device, freeboard ratio of 1.0.
7	Freeboard refrigeration device, dwell.
8	Reduced room draft, dwell, freeboard ratio of 1.0.
9	Freeboard refrigeration device, carbon adsorber.
10	Freeboard ratio of 1.0, superheated vapor, carbon adsorber.

Note: Unlike most of the control techniques available for complying with this rule, carbon adsorbers are not considered to be a pollution prevention measure. Use of such units may impose additional cost and burden for a number of reasons. First, carbon adsorption units are generally more expensive than other controls listed in the options. Second, these units may present cross-media impacts such as effluent discharges if not properly operated and maintained, and spent carbon beds have to be disposed of as hazardous waste. When making decisions about what controls to install on halogenated solvent cleaning machines to meet the requirements of this rule, all of these factors should be weighed and pollution prevention measures are encouraged wherever possible.

2. Demonstrate that the solvent cleaning machine can achieve and maintain an idling emission limit of 0.22 kilograms per hour per square meter (0.045 pounds per hour per square foot) of solvent/air interface area as determined using the procedures in s. NR 469.09(1).

Note: Owners and operators who choose to comply with an idling emission limit should also refer to s. NR 469.07.

(b) Each owner or operator of a batch vapor cleaning machine with a solvent/air interface area greater than 1.21 square meters (13 square feet) shall comply with the requirements specified in either subd. 1. or 2.

1. Employ one of the control combinations listed in Table 2 or other equivalent methods of control determined using the procedures in sub. (4).

Table 2. Control Combinations for Batch Vapor Solvent Cleaning Machines With a Solvent/Air Interface Area Greater Than 1.21 Square Meters (13 Square Feet)

Option	Control Combinations
1	Freeboard refrigeration device, freeboard ratio of 1.0, superheated vapor.
2	Dwell, freeboard refrigeration device, reduced room draft.
3	Working-mode cover, freeboard refrigeration device, superheated vapor.
4	Freeboard ratio of 1.0, reduced room draft, superheated vapor.
5	Freeboard refrigeration device, reduced room draft, superheated vapor.
6	Freeboard refrigeration device, reduced room draft, freeboard ratio of 1.0.
7	Freeboard refrigeration device, superheated vapor, carbon adsorber.

Note: Unlike most of the control techniques available for complying with this rule, carbon adsorbers are not considered to be a pollution prevention measure. Use of such units may impose additional cost and burden for a number of reasons. First, carbon adsorption units are generally more expensive than other controls listed in the options. Second, these units may present cross-media impacts such as effluent discharges if not properly operated and maintained, and spent carbon beds have to be disposed of as hazardous waste. When making decisions about what controls to install on halogenated solvent cleaning machines to meet the requirements of this rule, all of these factors should be weighed and pollution prevention measures are encouraged wherever possible.

2. Demonstrate that the solvent cleaning machine can achieve and maintain an idling emission limit of 0.22 kilograms per hour per square meter (0.045 pounds per hour per square foot) of solvent/air interface area as determined using the procedures in s. NR 469.09(1).

Note: Owners and operators who choose to comply with an idling emission limit should also refer to s. NR 469.07.

(3) Except as provided in s. NR 469.08 for all cleaning machines, each owner or operator of an in-line cleaning machine shall comply with par. (a) or (b), as appropriate. The owner of operator of a continuous web cleaning machine shall comply with the requirements of s. NR 469.073 or 469.077, as appropriate, in lieu of complying with this section.

(a) Each owner or operator of an existing in-line cleaning machine shall comply with the requirements specified in either subd. 1. or 2.

1. Employ one of the control combinations listed in Table 3 or other equivalent methods of control determined using the procedures in sub. (4).

Table 3. Control Combinations for Existing In-line Solvent Cleaning Machines

Option	Control Combinations
1	Superheated vapor, freeboard ratio of 1.0.
2	Freeboard refrigeration device, freeboard ratio of 1.0.
3	Dwell, freeboard refrigeration device.
4	Dwell, carbon adsorber.

Note: Unlike most of the control techniques available for complying with this rule, carbon adsorbers are not considered to be a pollution prevention measure. Use of such units may impose additional cost and burden for a number of reasons. First, carbon adsorption units are generally more expensive than other controls listed in the options. Second, these units may present cross-media impacts such as effluent discharges if not properly operated and maintained, and spent carbon beds have to be disposed of as hazardous waste. When making decisions about what controls to install on halogenated solvent cleaning machines to meet the requirements of this rule, all of these factors should be weighed and pollution prevention measures are encouraged wherever possible.

2. Demonstrate that the solvent cleaning machine can achieve and maintain an idling emission limit of 0.10 kilograms per hour per square meter (0.021 pounds per hour per square foot) of solvent/air interface area as determined using the procedures in s. NR 469.09(1).

Note: Owners and operators who choose to comply with an idling emission limit should also refer to s. NR 469.07.

(b) Each owner or operator of a new in-line cleaning machine shall comply with the requirements specified in either subd. 1. or 2.

1. Employ one of the control combinations listed in Table 4 or other equivalent methods of control determined using the procedures in sub. (4).

Table 4. Control Combinations for New In-line Solvent Cleaning Machines

Option	Control Combinations
1	Superheated vapor, freeboard refrigeration device.
2	Freeboard refrigeration device, carbon adsorber.
3	Superheated vapor, carbon adsorber.

Note: Unlike most of the control techniques available for complying with this rule, carbon adsorbers are not considered to be a pollution prevention measure. Use of such units may impose additional cost and burden for a number of reasons. First, carbon adsorption units are generally more expensive than other controls listed in the options. Second, these units may present cross-media impacts such as effluent discharges if not properly operated and maintained, and spent carbon beds have to be disposed of as hazardous waste. When making decisions about what controls to install on halogenated solvent cleaning machines to meet the requirements of this rule, all of these factors should be weighed and pollution prevention measures are encouraged wherever possible.

2. Demonstrate that the solvent cleaning machine can achieve and maintain an idling emission limit of 0.10 kilograms per hour per square meter (0.021 pounds per hour per square foot) of solvent/air interface area as determined using the procedures in s. NR 469.09(1).

Note: Owners and operators who choose to comply with an idling emission limit should also refer to s. NR 469.07.

(4) Upon written application, the administrator may approve the use of equipment or procedures after they have been satisfactorily demonstrated to be equivalent, in terms of reducing emissions of methylene chloride, perchloroethylene, trichloroethylene, 1,1,1-trichloroethane, carbon tetrachloride or chloroform to the atmosphere, to those prescribed for compliance within a specified paragraph of this chapter. The application shall contain a complete description of the equipment or procedure and the proposed equivalency testing procedure and the date, time and location scheduled for the equivalency demonstration.

Wisconsin Administrative CodeDepartment of Natural ResourcesNR 400-499 - Environmental Protection - Air Pollution ControlChapter NR 469 - Emission standards for hazardous air pollutants for halogenated solvent cleaning operationsSection NR 469.04 - Batch vapor and in-line cleaning machine standards