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 469.06 - Operational requirements associated with control devices for batch vapor and in-line cleaning machines

Current through June 24, 2024
Each owner or operator of a solvent cleaning machine
				  complying with s.
				  NR
				  469.04(2) or (3) or s.
				  NR
				  469.073 or shall comply 469.077 with the requirements
				  specified in this section.
(1) Conduct
				monitoring of each control device used to comply with s.
				NR
				469.04 as provided in s.
				NR
				469.10.
(2) Determine during each monitoring period
				whether each control device used to comply with these standards meets the
				requirements specified in pars. (a) to (k).
(a) If a freeboard refrigeration device is
				used to comply with these standards, the owner or operator shall ensure that
				the chilled air blanket temperature, in °F, measured at the center of the
				air blanket, is no greater than 30% of the solvent's boiling point.
(b) If a reduced room draft is used to comply
				with these standards, the owner or operator shall comply with the following
				requirements:
1. Ensure that the flow or
				movement of air across the top of the freeboard area of the solvent cleaning
				machine or within the solvent cleaning machine enclosure does not exceed 15.2
				meters per minute (50 feet per minute) at any time as measured using the
				procedures in s.
				NR
				469.10(4).
2. Establish and maintain the operating
				conditions under which the wind speed was demonstrated to be 15.2, meters per
				minute (50 feet per minute) or less as described in s.
				NR
				469.10(4).
(c) If a working-mode cover is used to comply
				with these standards, the owner or operator shall comply with the following
				requirements:
1. Ensure that the cover opens
				only for part entrance and removal and completely covers the cleaning machine
				openings when closed.
2. Ensure
				that the working-mode cover is maintained free of cracks, holes and other
				defects.
(d) If an
				idling-mode cover is used to comply with these standards, the owner or operator
				shall comply with the following requirements:
1. Ensure that the cover is in place whenever
				parts are not in the solvent cleaning machine and completely covers the
				cleaning machine openings when in place.
2. Ensure that the idling-mode cover is
				maintained free of cracks, holes and other defects.
(e) If dwell is used to comply with these
				standards, the owner or operator shall comply with the following requirements:
1. Determine the appropriate dwell time for
				each type of part or parts basket, or determine the maximum dwell time using
				the most complex part type or parts basket, as described in s.
				NR
				469.09(4).
2. Ensure that, after cleaning, each part is
				held in the solvent cleaning machine freeboard area above the vapor zone for
				the dwell time determined for that particular part or parts basket, or for the
				maximum dwell time determined using the most complex part type or parts
				basket.
(f) If a
				superheated vapor system is used to comply with these standards, the owner or
				operator shall comply with the following requirements:
1. Ensure that the temperature of the solvent
				vapor at the center of the superheated vapor zone is at least 5.6°C
				(10°F) above the solvent's boiling point.
2. Ensure that the manufacturer's
				specifications for determining the minimum proper dwell time within the
				superheated vapor system is followed.
3. Ensure that parts remain within the
				superheated vapor for at least the minimum proper dwell time.
(g) If a carbon adsorber in
				conjunction with a lip exhaust or other exhaust internal to the cleaning
				machine is used to comply with these standards, the owner or operator shall
				comply with the following requirements:
1.
				Except as provided in subd. 4., ensure that the concentration of organic
				solvent in the exhaust from the carbon adsorber does not exceed 100, parts per
				million of any halogenated HAP compound as measured using the procedure in s.
				NR
				469.10(5). If the halogenated HAP
				solvent concentration in the carbon adsorber exhaust exceeds 100, parts per
				million, the owner or operator shall adjust the desorption schedule or replace
				the disposable canister, if not a regenerative system, so that the exhaust
				concentration of halogenated HAP solvent is brought below 100, parts per
				million.
2. Ensure that the carbon
				adsorber bed is not bypassed during desorption.
3. Ensure that the lip exhaust is located
				above the solvent cleaning machine cover so that the cover closes below the lip
				exhaust level.
4. For each batch
				vapor or in-line vapor cleaning machine that is not exempt under s.
				NR 423.03(2) (a), (b), (d),
				(e) or (h), but is exempt under s.
				NR 423.03(2)
				(i), ensure that the concentration of organic
				solvent in the exhaust from the carbon adsorber does not exceed 25, parts per
				million of solvent as measured using the procedure in s.
				NR
				469.10(5). If the solvent
				concentration in the carbon adsorber exhaust exceeds 25 parts per million, the
				owner or operator shall adjust the desorption schedule or replace the
				disposable canister, if not a regenerative system, so that the exhaust
				concentration of solvent is brought below 25 parts per million.
Note: Subdivision 4. contains pertinent language previously
				  applicable under s.
				  NR 423.03(4) (c) 4. and (5)
				  (c) 2., and now applicable under this chapter
				  instead, to owners and operators of batch vapor cleaning machines and in-line
				  vapor cleaning machines that use solvents that contain halogenated HAP
				  compounds that are also VOCs.
(h) If a superheated part system is used to
				comply with the standards for continuous web cleaning machines in s.
				NR
				469.073, the owner or operator shall ensure that the
				temperature of the continuous web part is at least 10 degrees Fahrenheit above
				the solvent boiling point while the part is traveling through the cleaning
				machine.
(i) If a squeegee system
				is used to comply with the continuous web cleaning requirements of s.
				NR
				469.073(3) (c) or
				469.077(2) (a), the
				owner or operator shall comply with the following requirements:
1. Determine the appropriate maximum product
				throughput for the squeegees used in the squeegee system, as described in s.
				NR
				469.09(6).
2. Conduct the weekly monitoring required by
				s.
				NR 469.10(1)
				(c). Record the results required by s.
				NR 469.11(1)
				(f).
3. Calculate the total amount of continuous
				web product processed since the squeegees were replaced and compare to the
				maximum product throughput for the squeegees.
4. Ensure squeegees are replaced at or before
				the maximum product throughput is attained.
5. Redetermine the maximum product throughput
				for the squeegees if any solvent film is visible on the continuous web part
				immediately after it exits the cleaning machine.
(j) If an air knife system is used to comply
				with the continuous web cleaning requirements of s.
				NR
				469.073(3) (c) or
				469.077(2) (a), the
				owner or operator shall comply with the following requirements:
1. Determine the air knife parameter and
				parameter value that demonstrate to the department's satisfaction that the air
				knife is properly operating. An air knife is properly operating if no visible
				solvent film remains on the continuous web part after it exits the cleaning
				machine.
2. Maintain the selected
				air knife parameter value at the level determined in s.
				NR
				469.04(1).
3. Conduct the weekly monitoring required by
				s.
				NR 466.10(1)
				(c).
4. Redetermine the proper air knife parameter
				value if any solvent film is visible on the continuous web part immediately
				after it exits the cleaning machine.
(k) If a combination squeegee and air knife
				system is used to comply with the continuous web cleaning requirements of s.
				NR
				469.073(3) (c) or
				469.077(2) (a), the
				owner or operator shall comply with the following requirements:
1. Determine the system parameter and value
				that demonstrate to the department's satisfaction that the system is properly
				operating.
2. Maintain the selected
				parameter value at the level determined in s.
				NR
				469.04(1).
3. Conduct the weekly monitoring required by
				s.
				NR 469.10(1)
				(c).
4. Redetermine the proper parameter value if
				any solvent film is visible on the continuous web part immediately after it
				exits the cleaning machine.