Wis. Admin. Code Department of Natural Resources NR 469.05

Current through November 25, 2024

Section NR 469.05 - Work and operational practice standards for batch vapor and in-line cleaning machines

Except as provided in s. NR 469.08 for all cleaning machines, each owner or operator of an existing or new batch vapor or in-line solvent cleaning machine shall meet all of the following required work and operational practices, as applicable. The owner or 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.

(1) Control air disturbances across the cleaning machine openings by incorporating the control equipment or techniques in par. (a) or (b).

(a) 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 to not be in place.

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

(2) The parts baskets or the parts being cleaned in an open-top batch vapor cleaning machine may not occupy more than 50% of the solvent/air interface area unless the parts baskets or parts are introduced at a speed of 0.9 meters per minute (3 feet per minute) or less.

(3) Any spraying operations shall be done within the vapor zone or within a section of the solvent cleaning machine that is not directly exposed to the ambient air, such as a baffled or enclosed area.

(4) Parts shall be oriented so that the solvent drains from them freely. Parts having cavities or blind holes shall be tipped or rotated before being removed from any solvent cleaning machine unless an equally effective approach has been approved by the department.

(5) Parts baskets or parts may not be removed from any solvent cleaning machine until dripping has stopped.

(6) During startup of each vapor cleaning machine, the primary condenser shall be turned on before the sump heater.

(7) 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.

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

(9) 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.

(10) Each operator of a solvent cleaning machine shall complete and pass the applicable sections of the test of solvent cleaning procedures in Table 5 if requested during an inspection by the department.

(11) Waste solvent, still bottoms and sump bottoms shall be collected and stored in closed containers. The closed containers may contain a device that allows pressure relief, but that device may not allow liquid solvent to drain from the container.

(12) Sponges, fabric, wood and paper products may not be cleaned.

(13) If the solvent cleaning machine 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), it may not be operated so as to allow water to be visually detectable in solvent exiting the water separator.

(14) If the solvent cleaning machine is not exempt under s. NR 423.03(2) (a), (b), (d), (e), (f) or (h), but is exempt under s. NR 423.03(2) (i), a permanent conspicuous label, summarizing the work and operational practices specified in subs. (1) to (9) and (11) to (13), shall be provided.

Table 5. Test of Solvent Cleaning Procedures

General Questions
1.	What is the maximum allowable speed for
parts entry and removal?
A. 8.5 meters per minute (28 feet per minute).
B. 3.4 meters per minute (11 feet per minute).
C. 11 meters per minute (36 feet per minute).
D. No limit.
2.	How do you ensure that parts enter and exit
the solvent cleaning machine at the speed
required in the regulation?
A. Program on computerized hoist monitors speed.
B. Can judge the speed by looking at it.
C. Measure the time it takes the parts to
travel a measured distance.
3.	Identify the sources of air disturbances.
A. Fans.
B. Open doors.
C. Open windows.
D. Ventilation vents.
E. All of the above.
4.	What are the three operating modes?
A. Idling, working and downtime.
B. Precleaning, cleaning and drying.
C. Startup, shutdown, off.
D. None of the above.
5.	When may parts or parts baskets be removed
from the solvent cleaning machine?
A. When they are clean.
B. At any time.
C. When dripping stops.
D. Either A or C is correct.
6.	How must parts be oriented during cleaning?
A. It does not matter as long as they fit in
the parts basket.
B. So that the solvent pools in the cavities
where the dirt is concentrated.
C. So that solvent drains from them freely.
7.	During startup, what must be turned on first,
the primary condenser or the sump heater?
A. Primary condenser.
B. Sump heater.
C. Turn both on at same time.
D. Either A or B is correct.
8.	During shutdown, what must be turned off
first, the primary condenser or the sump
heater?
A. Primary condenser.
B. Sump heater.
C. Turn both off at same time.
D. Either A or B is correct.
9.	In what manner must solvent be added to and
removed from the solvent cleaning machine?
A. With leak proof couplings.
B. With the end of the pipe in the solvent
sump below the liquid solvent surface.
C. So long as the solvent does not spill, the
method does not matter.
D. A and B.
10.	What must be done with waste solvent and
still and sump bottoms?
A. Pour down the drain.
B. Store in closed container.
C. Store in a bucket.
D. A or B.
11.	What types of materials are prohibited from
being cleaned in solvent cleaning machines
using halogenated HAP solvents?
A. Sponges.
B. Fabrics.
C. Paper.
D. All of the above.
Control Device Specific Questions
[ ]	Freeboard Refrigeration Device
1. What chilled air blanket temperature must
the freeboard refrigeration device achieve?
A. Below room temperature.
B. 10°C (50°F).
C. Below the solvent boiling point.
D. No greater than 30% of the solvent's
boiling point, in °F.
[ ]	Working-Mode Cover
2. When may a cover be open?
A. While parts are in the cleaning machine.
B. During parts entry and removal.
C. During maintenance.
D. During measurements for compliance
purposes.
E. A and C.
F. B, C, and D.
3. Covers must be maintained in what condition?
A. Free of holes.
B. Free of cracks.
C. So that they completely seal cleaner
opening.
D. All of the above.
[ ]	Dwell
4. When no superheated vapor is used, where
must the parts be held for the appropriate
dwell time?
A. In the vapor zone.
B. In the freeboard area above the vapor
zone.
C. Above the cleaning machine.
D. In the immersion sump.

Wis. Admin. Code Department of Natural Resources NR 469.05

Cr. Register, March, 1997, No. 495, eff. 4-1-97; CR 07-105: am. (intro.) and (10) Register December 2008 No. 636, eff. 1-1-09.