R 336.1612 Existing open top vapor degreasers.

Rule 612. (1) A person shall not operate an existing open top vapor degreaser unless all of the provisions of this rule are met or unless an equivalent control method is approved by the department. (2) A person shall not operate an existing open top vapor degreaser unless all of the following conditions are met: (a) A cover is installed that is designed to be opened and closed easily without disturbing the vapor zone. The cover must be closed at all times, except when processing workloads through the degreaser. (b) A procedure is be developed to minimize organic solvent carryout by doing all of the following: (i) Racking parts to allow complete drainage. (ii) Moving parts in and out of the degreaser at a vertical speed of less than 11 feet per minute when a powered hoist is used to raise or lower the parts. (iii) Holding parts in the vapor zone not less than 30 seconds or until condensation ceases. (iv) Tipping or tumbling parts in a manner such that no pools of organic solvent remain on the cleaned parts before removal. (v) Allowing parts to dry within the degreaser for not less than 15 seconds or until visually dry. (c) Total workload does not occupy more than 1/2 of the degreaser's open top area. (d) Organic solvent is not sprayed above the vapor level. (e) Organic solvent leaks are repaired immediately. (f) The degreaser is operated in a manner such that no water is visibly detectable in solvent exiting the water separator. (g) Exhaust ventilation do not exceed 65 cubic feet per minute per square foot of degreaser open area, unless necessary to meet OSHA requirements. (h) Waste organic solvent is stored only in closed containers, unless demonstrated to be a safety hazard and disposed of in a manner such that not more than 20% by weight is allowed to evaporate into the atmosphere. (3) A person responsible for the provisions of this rule shall develop written procedures for the operation of all such provisions, and such procedures shall be posted in an accessible, conspicuous location near the vapor degreaser. (4) The provisions of this rule do not apply to any existing open top vapor degreaser having an air/vapor interface of less than 4 square feet. (5) The provisions of this rule do not apply to an existing open top vapor degreaser that is subject to the provisions of 40 C.F.R. Part 63, Subpart T, “National Emission Standards for Halogenated Solvent Cleaning,” adopted by reference in R 336.1902.