Arizona Administrative Code › Title 18 - ENVIRONMENTAL QUALITY › Chapter 2 - DEPARTMENT OF ENVIRONMENTAL - QUALITY AIR POLLUTION CONTROL › Article 4 - PERMIT REQUIREMENTS FOR NEW MAJOR SOURCES AND MAJOR MODIFICATIONS TO EXISTING MAJOR SOURCES › Section R18-2-405 - Special Rule for Major Sources of VOC or Nitrogen Oxides in Ozone Nonattainment Areas Classified as Serious or Severe

Current through Register Vol. 30, No. 28, July 12, 2024
A. Applicability. The provisions of this
				Section only apply to stationary sources of VOC or nitrogen oxides in ozone
				nonattainment areas classified as serious or severe. Unless otherwise provided
				in this Section, all requirements of Articles 3 and 4 of this Chapter
				apply.
B. "Significant" means, in
				reference to an emissions increase or a net emissions increase, any increase in
				actual emissions of volatile organic compounds or nitrogen oxides that would
				result from any physical change in, or change in the method of operation of, a
				major source, if the emissions increase of volatile organic compounds or
				nitrogen oxides exceeds 25 tons per year.
C. For any major source that emits or has the
				potential to emit less than 100 tons of VOC or oxides of nitrogen per year, a
				physical or operational change that results in a significant increase in VOC or
				oxides of nitrogen, respectively, from any discrete operation, unit, or other
				pollutant emitting activity at the source shall constitute a major
				modification, except that the increase shall not constitute a major
				modification, if the owner or operator of the source elects to offset the
				increase by a greater reduction in emissions of VOC or oxides of nitrogen, as
				applicable, from other operations, units or activities at the source at an
				internal offset ratio of at least 1.3 to 1. If the owner or operator does not
				make such an election, the change shall constitute a major modification but
				BACT shall be substituted for LAER when applying
				R18-2-403(A)(1)
				to the major modification.
D. For
				any stationary source that emits or has the potential to emit 100 tons or more
				of VOC or oxides of nitrogen per year, a physical or operational change that
				results in any significant increase in VOC from any discrete operation, unit or
				other pollutant emitting activity at the source or oxides of nitrogen,
				respectively, shall constitute a major modification except that if the owner or
				operator of the source elects to offset the increase by a greater reduction in
				emissions of VOC or oxides of nitrogen, as applicable, from other operations,
				units or activities within the source at an internal offset ratio of at least
				1.3 to 1, R18-2-403(A)(1) shall not apply to the change.
E. For any new major source or major
				modification that is classified as major because of emissions or potential to
				emit VOC or nitrogen oxides in an ozone nonattainment area classified as
				serious, the increase in emissions of these pollutants from the source or
				modification shall be offset at a ratio of 1.2 to 1. The offset shall be made
				in accordance with the provisions of
				R18-2-404.
F. For any new major source or major
				modification that is classified as such because of emissions or potential to
				emit VOC or nitrogen oxides in an ozone nonattainment area classified as
				severe, the increase in emissions of these pollutants from the source or
				modification shall be offset at a ratio of 1.3 to 1. These offsets shall be
				made in accordance with the provisions of
				R18-2-404.