Section 250-RICR-120-05-23.4 - DefinitionsA. Unless otherwise expressly defined in this section, the terms used in this regulation shall be defined by reference to Part 0 of this Subchapter (General Definitions). As used in this regulation, the following terms shall, where the context permits, be construed as follows: 1. "Articles" means clothing, garments, textiles, fabrics, leather goods, and similar materials.2. "Carbon adsorber" means a dry cleaning control system that consists of an inlet for exhaust gases; activated carbon in the form of a fixed bed, cartridge or canister as an adsorbent and an outlet for exhaust gases; and a system to strip or desorb solvent from the saturated adsorbent.3. "Closed-loop machine" means a dry-to-dry machine that recirculates perchloroethylene-laden vapor through a refrigerated condenser and that does not exhaust to the atmosphere during the drying cycle. A closed-loop machine may allow venting to the ambient air through a local exhaust ventilation system, such as a door fan, after the drying cycle is complete and the machine door is open.4. "Co-located" means sharing a common wall, floor, or ceiling with a residence or a separately owned business.5. "Colorimetric detector tube" means a glass tube which is designed to measure the concentration of perchloroethylene in air drawn through the tube and that contains a sorbent material which is impregnated with a chemical that is sensitive to perchloroethylene.6. "Cool-down" means the portion of the drying cycle that begins when the heating mechanism deactivates. During the cool-down period, the refrigerated condenser continues to reduce the temperature of the air circulating through the drum to reduce the concentration of perchloroethylene in the drum.7. "Day care center" means any person, firm, corporation, association or agency who, on a regular or irregular basis, receives any child under the age of sixteen (16) years, for the purpose of care and/or supervision, apart from their parent or guardian, for any part of a 24-hour day.8. "Desorption" means the regeneration or stripping of a carbon adsorber of the adsorbed solvent using hot air, steam or other means.9. "Distillation unit" means a device used to volatilize and recover perchloroethylene from contaminated perchloroethylene.10. "Diverter valve" means a flow control device that prevents room air from passing through a refrigerated condenser when the door of a dry cleaning machine is open.11. "Door fan" means a local exhaust ventilation system that pulls room air into the dry cleaning machine when the machine door is open.12. "Drum" means the rotating cylinder or wheel of the dry cleaning machine that holds the articles being cleaned.13. "Dry cleaning" means a process used to remove soil, grease, paint and other unwanted substances from articles using perchloroethylene as a solvent.14. "Dry cleaning control system" means equipment used to reduce the amount of perchloroethylene in an air stream prior to discharge to the atmosphere.15. "Dry cleaning system" means all equipment, devices or apparatus associated with dry cleaning operations including, but not limited to: dry-to-dry machines; transfer machine systems; perchloroethylene filter and purification systems; perchloroethylene waste holding, treatment and disposal systems; perchloroethylene supply systems; dip tanks; pumps; gaskets, piping, ducting, fittings, valves or flanges that convey liquid perchloroethylene or perchloroethylene-contaminated air; and dry cleaning control systems.16. "Dry-to-dry machine" means a dry cleaning operation in which washing and drying are performed in the same machine.17. "Dryer" means a machine used to remove perchloroethylene from articles by tumbling them in a heated air stream.18. "Drying cycle" means the portion of a dry cleaning machine's operating cycle in which the perchloroethylene remaining in the articles after washing and extraction is actively removed. The drying cycle begins when the heating coils are activated and ends when the machine ceases rotation of the drum.19. "Drying sensor" means a device that senses the perchloroethylene concentration in the drying air or the liquid solvent recovery rate. The drying sensor automatically extends the drying cycle for a set time beyond the activation point to ensure that the articles are dry before being removed from the machine. Drying sensors include, but are not limited to: infrared analyzers, float switches, and resistance probes.20. "Exhaust damper" means a flow control device that prevents the air-perchloroethylene gas-vapor stream from exiting the dry cleaning machine and flowing into a carbon adsorber before room air is drawn into the dry cleaning machine.21. "Filter" means a porous device through which perchloroethylene is passed to remove contaminants in suspension. Examples of filters include, but are not limited to, lint filter (button trap), cartridge filter, tubular filter, regenerative filter, prefilter, polishing filter, and spin disc filter.22. "Heating coil" means the device used to heat the air stream circulated from the dry cleaning machine drum after perchloroethylene has been condensed from the air stream and before the stream reenters the dry cleaning machine drum.23. "Muck cooker" means a device for heating material trapped by a filter in a dry cleaning machine for the purpose of driving off perchloroethylene vapors for reclaiming.24. "Perchloroethylene dry cleaning facility" means a facility engaged in dry cleaning using perchloroethylene. The facility includes, but is not limited to, any dry cleaning system and attendant stacks.25. "Primary carbon adsorber" means a carbon adsorber used to control process vent emissions from a transfer machine system or a dry-to-dry machine that is not a closed-loop machine.26. "Reclaimer" means a machine used to remove perchloroethylene from articles by tumbling them in a heated air stream.27. "Refrigerated condenser" means a dry cleaning control system that removes condensable vapors from a gas-vapor stream by cooling the vapors using a mechanical refrigerated system.28. "Secondary carbon adsorber" means a carbon adsorber that is designed to further reduce the perchloroethylene concentration in the gas-vapor stream after the stream is cooled by a refrigerated condenser.29. "Transfer machine system" means a multiple-machine dry cleaning operation in which washing and drying are performed in different machines. Examples include, but are not limited to: a. A washer and dryer(s);b. A washer and reclaimer(s); or c. A dry-to-dry machine and reclaimer(s).30. "Water separator" means a vessel that uses gravity to physically separate liquid perchloroethylene from liquid water.250 R.I. Code R. 250-RICR-120-05-23.4
Amended effective 12/24/2018