Section 250-RICR-120-05-22.4 - 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. "Acceptable ambient level" or "AAL" means the maximum ambient air concentration of a listed toxic air contaminant that may be contributed by a stationary source, at or beyond that facility's property line, as delineated in §§ 22.9 and 22.10 of this Part, averaged over the time period specified in those tables.2. "Carcinogen" means a listed toxic substance in §§ 22.9, 22.10, or 22.11 of this Part.3. "Construction" means any physical change or change in the method of operation (including fabricating, erecting, locating, modification or demolition of an emissions unit) which would result in a change in actual emissions.4. "Existing source" means a stationary source which is in existence on the effective date of this regulation or, for a listed toxic substance that was added to § 22.9 of this Part, in a subsequent amendment of this regulation, a stationary source that was in existence on the effective date of that amendment.5. "Imminent threat" means a condition in which the emissions of one or more listed toxic air contaminants from a facility can result in ambient air levels that, if not abated in a reasonable time period, as determined by the Director, have the potential to cause serious health effects to members of the public.6. "Impact" means the ground level concentration of a pollutant resulting from emissions of that pollutant from a facility. Impact does not include background ambient air concentrations of the pollutant or concentrations of the pollutant resulting from emissions from other facilities.7. "Listed toxic air contaminant" means any listed toxic substance emitted to the atmosphere as dust, fume, gas, mist, smoke, vapor, or soot.8. "Listed toxic substance" means any substance that is listed in § 22.9 of this Part.9. "Major fuel-burning modification" means any physical change or change in the method of operation of a major fuel-burning source that would result in a net emission increase, as defined in Part 9 of this Subchapter (Air Pollution Control Permits), of air pollutants from the combustion of fuel oil, propane, natural gas, or a combination of those fuels equal to or in excess of: a. Fifteen (15) tons per year of particulate matter less than 2.5 microns in diameter,b. Twenty-five (25) tons per year of nitrogen oxides or volatile organic compounds,c. Forty (40) tons per year of sulfur dioxide, or d. One hundred (100) tons per year of carbon monoxide.10. "Major fuel-burning source" means any stationary source that emits or has the potential to emit, as defined in Part 9 of this Subchapter (Air Pollution Control Permits), air pollutants from the combustion of fuel oil, propane, natural gas, or a combination of those fuels equal to or in excess of: a. Fifty (50) tons per year of nitrogen oxides or volatile organic compounds or b. One hundred (100) tons per year of carbon monoxide, sulfur dioxide or particulate matter less than 2.5 microns in diameter.11. "Modification" means any physical or operational change to any machine, equipment, device, article or facility which may result in an increased emission rate to the atmosphere of any air contaminant. The following shall not be considered a modification: a. Routine maintenance, repair, and replacement of any machine, equipment, device, article or facility or parts;b. Increase in production rate of any machine, equipment, device, article or facility based solely upon the capabilities of existing process equipment;c. Increase in hours of operation up to the maximum hours allowed in any federally enforceable air pollution control permit or air toxics operating permit; and d. Use of an alternative fuel or raw material if the machine, equipment, device, article or facility was designed and permitted to accommodate that alternative use.12. "Perchloroethylene dry cleaning facility" means a facility engaged in the cleaning of clothing, garments, textiles, fabrics, leather goods and/or similar items by means of one or more washes in perchloroethylene, extraction of excess perchloroethylene by spinning, and drying by tumbling in an airstream. The facility includes, but is not limited to, any washer, dryer, filter and purification system, waste disposal system, holding tank, pump, air pollution control equipment and attendant piping, valves and stacks. 13. "Reformulation" means the elimination or reduction of the use of one or more listed toxic substances by replacement with one or more, less toxic substances.250 R.I. Code R. 250-RICR-120-05-22.4
Adopted effective 1/10/2019