Section R18-2-1701. Definitions  


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  • The following definitions, and the definitions contained in Article 1 of this Chapter and A.R.S. § 49-401.01 apply to this Article unless the context otherwise applies.

    1.        “Acute adverse effects to human health” means those effects described in A.R.S. § 49-401.01(2) that are of short duration or rapid onset.

    2.        “Acute Ambient Air Concentration (AAAC)” means that concentration of a hazardous air pollutant, in the ambient air, above which the general population, including sus- ceptible populations, could experience acute adverse effects to human health.

    3.        Notwithstanding the definition at R18-2-101(5), “Affected source,” in this Article, has the meaning of “affected source” contained in 40 CFR 63.2, as of July 1, 2004 (and no future amendments or editions), which is incorporated herein by reference, and is on file with the Department.

    4.        “Ambient air concentration (AAC)” means that concen- tration of a hazardous air pollutant in the ambient air, listed in R18-2-1708(C)(1) or determined according to R18-2-1708(C)(2) or (C)(3), above which the general population, including susceptible populations, could experience adverse effects to human health.

    5.        “Arizona maximum achievable control technology” or “AZMACT” means an emission standard that requires the maximum degree of reduction in emissions of the hazardous air pollutants subject to this Chapter, including a prohibition on the emissions where achievable and that the Director, according to R18-2-1707, has determined to be achievable by an affected source to which the standard applies, through application of measures, processes, methods, systems or techniques including measures that:

    a.         Reduce the volume of, or eliminate emissions of, the pollutants through process changes, substitution of materials, or other modifications;

    b.        Enclose systems or processes to eliminate emis- sions;

    c.         Collect, capture or treat the pollutants when released from a process, stack, storage or fugitive emissions point;

    d.        Are design, equipment, work practice, or operational standards, including requirements for operator train- ing or certification; or

    e.         Are a combination of the above.

    6.        “Chemical Abstract Service (CAS) Number” means a unique, identifying number assigned by the Chemical Abstract Service to each distinct chemical substance.

    7.        “Chronic adverse effects to human health” means those effects described in A.R.S. § 49-401.01(2) that are of a persistent, recurring, or long-term nature or that are delayed in onset.

    8.        “Chronic Ambient Air Concentration (CAAC)” means that concentration of a hazardous air pollutant, in the ambient air, above which the general population, includ- ing susceptible populations, could experience chronic adverse effects to human health.

    9.        “Federally listed hazardous air pollutant” means any air pollutant adopted under R18-2-1703.

    10.     “Hazardous air pollutant” means any federally listed haz- ardous air pollutant.

    11.     “Major source of state hazardous air pollutants (HAPs)” means:

    a.         A stationary source that emits or has the potential to emit in the aggregate, including fugitive emissions, 10 tons per year or more of any state hazardous air pollutant or 25 tons per year or more of any combi- nation of state hazardous air pollutants.

    b.        Any change to a minor source of hazardous air pol- lutants that would increase its emissions to the quali- fying levels in subsection (a).

    12.     “Minor source of state hazardous air pollutants (HAPs)” means a stationary source that emits or has the potential

    Department of Environmental Quality Air Pollution Control

    to emit, including fugitive emissions, one ton or more but less than 10 tons per year of any hazardous air pollutant or two and one-half tons or more but less than 25 tons per year of any combination of hazardous air pollutants.

    13.     “Modification” or “modify” means a physical change in, or change in the method of operation of, a source that increases the actual emissions of any state hazardous air pollutant (HAP) emitted by the source by more than any de minimis amount listed in Table 1, or which results in the emission of any HAP not previously emitted by the source by more than any de minimis amount listed in Table 1, including a change that increases source’s actual emissions of any state HAP that results in total source emissions that exceed 1 tpy of any individual HAP or 2.5 tpy of any combination of HAPs. A physical change in, or change in the method of operation of, a source is not a modification under this definition if:

    a.         The change, together with any other changes imple- mented or planned by the source, qualifies for an alternative emission limitation under § 112(i)(5) of the Clean Air Act;

    b.        The Clean Air Act § 112(d) or (f) imposes a standard requiring the change that is implemented after the Administrator promulgates the standard;

    c.         The change is routine maintenance, repair, or replacement;

    d.        The change is the use of an alternative fuel or raw material by reason of an order under Sections 2(a) and (b) of the Energy Supply and Environmental Coordination Act of 1974, 15 U.S.C. 792, or by rea-

    son of a natural gas curtailment plan under the Fed- eral Power Act, 16 U.S.C. 792 - 825r;

    e.         The change is the use of an alternative fuel by reason of an order or rule under Section 125 of the Act;

    f.         The change is the use of an alternative fuel at a steam generating unit to the extent that the fuel is generated from municipal solid waste;

    g.        The change is an increase in the hours of operation or in the production rate, unless the change would be prohibited under an enforceable permit condition; or

    h.        The change is any change in ownership at a station- ary source.

    14.     “Potential to emit” or “potential emission rate” means the maximum capacity of a stationary source to emit a pollut- ant, excluding secondary emissions, taking into account controls that are enforceable under any federal, state, or local law, rule or regulation, or that are inherent in the design of the source.

    15.     “SIC Code” means the standard industrial classification code number for a source category derived from 1987 Standard Industrial Classification Manual (U.S. Office of Management and Budget, 1987).

    16.     “State hazardous air pollutant” (HAP) means any feder- ally listed hazardous air pollutant.

    17.     “Technology transfer” means the process by which exist- ing control technologies that have been successfully applied in one or more source categories that have similar processes or emissions units are reviewed for potential use in a different source category.