NR 423.03(3)(g)(g) Provide supervision or instruction adequate to ensure that the operation is conducted in accord with all of the following:
NR 423.03(3)(g)1.1. Close the cover whenever parts are not being handled in the cleaner.
NR 423.03(3)(g)2.2. Drain the cleaned parts for at least 15 seconds or until dripping ceases.
NR 423.03(3)(g)3.3. Store waste solvent only in covered containers and not dispose of waste solvent or transfer it to another person in such a way as to cause greater than 15% of the waste solvent, by weight, to evaporate into the ambient air during the ozone season, s. NR 419.04 notwithstanding.
NR 423.03(3)(g)4.4. Repair solvent leaks immediately, or shut down the degreaser until the leaks are repaired.
NR 423.03(3)(h)(h) Design the cover so that it is either a roll-top cover, a canvas curtain cover, a guillotine (biparting) cover, or any other type of cover that slides off the degreaser in a horizontal motion and is designed such that it can be opened or closed without disturbing the vapor layer or the solvent surface if any of the following applies:
NR 423.03(3)(h)1.1. The solvent volatility is greater than 2 kPa (0.3 psia) measured at 38°C (100°F).
NR 423.03(3)(h)2.2. The solvent is agitated.
NR 423.03(3)(h)3.3. The solvent is heated.
NR 423.03(3)(i)(i) If freeboard is chosen as a control device under par. (d), design or modify the freeboard to give a freeboard ratio greater than or equal to 1.0.
NR 423.03(3)(j)(j) If a system of equivalent control is chosen under par. (d) 3., the level of control shall be equivalent to that achieved under a freeboard ratio of 1.0.
NR 423.03(4)(4)Open top vapor degreasers. Except as provided under sub. (2) (a), (b), (d), (h), and (i), the owner or operator of an open top vapor degreaser shall do all of the following:
NR 423.03(4)(a)(a) Equip the vapor degreaser with a cover that can be opened and closed easily without disturbing the vapor zone.
NR 423.03(4)(b)(b) Provide the following safety switches:
NR 423.03(4)(b)1.1. A condenser flow switch or other switching system which shuts off the sump heat if the condenser coolant is either not circulating or too warm.
NR 423.03(4)(b)2.2. A thermostatically activated control switch which shuts off the sump heat when the vapor level rises above the upper boundary of the normal range.
NR 423.03(4)(b)3.3. A spray safety switch which shuts off the spray pump if the vapor level does not stay within the normal range.
NR 423.03(4)(c)(c) Install and use one of the following control devices:
NR 423.03(4)(c)1.1. Except when par. (o) applies, a freeboard ratio equal to or greater than 0.75 for all degreasers, with a powered or mechanically assisted cover for any degreaser with an opening which is greater than 1.0 square meter (10.8 square feet).
NR 423.03(4)(c)2.2. Refrigerated freeboard chiller.
NR 423.03(4)(c)3.3. Enclosed design (cover or door opens only when the dry part is actually entering or exiting the degreaser).
NR 423.03(4)(c)4.4. Ventilation greater than or equal to 15 cubic meters per minute per square meter (50 cubic feet per minute per square foot) of air-vapor area (when cover is open), all passing through a carbon adsorption system which exhausts less than 25 parts per million of solvent averaged over one complete adsorption cycle.
NR 423.03(4)(c)5.5. A control system demonstrated to have control efficiency equivalent to or greater than any of subds. 1. to 4. and approved by the department.
NR 423.03(4)(d)(d) Position any ventilation fans so that they do not disturb the degreaser’s vapor zone, and limit exhaust ventilation to 20 cubic meters per minute per square meter (65 cubic feet per minute per square foot) of degreaser open area during the ozone season, unless a higher exhaust rate is necessary to meet OSHA requirements.
NR 423.03(4)(e)(e) Keep the cover closed at all times except when processing workloads through the degreaser.
NR 423.03(4)(f)(f) Always spray below the vapor level.
NR 423.03(4)(g)(g) Minimize solvent carryout by doing all of the following:
NR 423.03(4)(g)1.1. Racking parts to allow complete drainage.
NR 423.03(4)(g)2.2. Moving parts in and out of the degreaser at less than 3.3 meters per minute (11 feet per minute).