(1)The owner or operator of conveyorized cold cleaners and conveyorized vapor degreasers must comply with the following operating requirements:
(a)Exhaust ventilation must not exceed 20 cubic meters per minute per square meter (65 cubic feet per minute per square foot) of degreaser opening, unless necessary to meet OSHA requirements. Workplace fans must not be used near the degreaser opening;
(b)Post in the immediate work area a permanent and conspicuous pictograph or instructions clearly explaining the following work practices:
(A)Rack parts for best drainage;
(B)Maintain vertical speed of conveyored parts to less than 3.35 meters per minute (11 feet/minute);
(C)The condenser water must be turned on before the sump heater when starting up a cold vapor degreaser. The sump heater must be turned off and the solvent vapor layer allowed to collapse before closing the condenser water when shutting down a hot vapor degreaser.
(2)A routine inspection and maintenance program must be implemented for the purpose of preventing and correcting solvent losses, as for example, from dripping drain taps, cracked gaskets, and malfunctioning equipment. Leaks must be repaired immediately.
(3)Sump drainage and transfer of hot or warm solvent must be carried out using threaded or other leak-proof couplings.
(4)Still and sump bottoms must be kept in closed containers.
(5)Waste solvent must be stored in covered containers and returned to the supplier or a disposal firm handling solvents for final disposal, such that no greater than 20 percent of the waste by weight can evaporate into the atmosphere. Handling of the waste must also be done in accordance with DEQ’s Solid and Hazardous Waste Rules, OAR 340 division 100.
(6)All conveyorized cold cleaners and conveyorized vapor degreasers with air/vapor interfaces of 2.0 m2 or greater must have one of the following major control devices installed and operating:
(a)Carbon adsorption system, exhausting less than 25 ppm of solvent averaged over a complete adsorption cycle, based on exhaust ventilation of 15 m3/minutes per m2 of air/vapor area, when down-time covers are open; or
(b)Refrigerated chiller with control effectiveness equal to or better than subsection (a); or
(c)A system with control effectiveness equal to or better than subsection (a).
Rule 340-232-0200 — Conveyorized Degreasers,