NR 423.03(3)(c)(c) Equip the cleaner with a facility for draining cleaned parts, and the drainage facility shall be constructed internally so that parts are enclosed under the cover while draining if the solvent volatility is greater than 4.3 kPa (0.6 psia) measured at 38ºC (100°F), except that the drainage facility may be external for applications where an internal type cannot fit into the cleaning system. NR 423.03(3)(d)(d) Install one of the following control devices if the solvent volatility is greater than 4.3 kPa (0.6 psia) measured at 38°C (100°F), or if the solvent is heated above 49°C (120°F): NR 423.03(3)(d)1.1. Freeboard that gives a freeboard ratio greater than or equal to 0.70. NR 423.03(3)(d)2.2. Water cover (solvent must be insoluble in and heavier than water). NR 423.03(3)(d)3.3. Other systems of equivalent control, such as refrigerated chiller or carbon adsorption, approved by the department. NR 423.03(3)(e)(e) If used, supply a solvent spray that is a solid fluid stream (not a fine, atomized or shower type spray) at a pressure which does not cause extensive splashing. NR 423.03(3)(f)(f) Provide a permanent, conspicuous label, summarizing the operating requirements. 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)(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)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)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)3.3. Enclosed design (cover or door opens only when the dry part is actually entering or exiting the degreaser).