Administrative Rules of Montana › Department 17 - ENVIRONMENTAL QUALITY › Chapter 17.8 - AIR QUALITY › Subchapter 17.8.8 - Prevention of Significant Deterioration of Air Quality › Rule 17.8.822 - AIR QUALITY ANALYSIS

Current through Register Vol. 13, July 5, 2024
(1) Any application
				for a permit pursuant to this subchapter shall contain an analysis of ambient
				air quality in the area that the emissions from the major stationary source or
				major modification would affect.
(2) For a major stationary source, the
				analysis shall address each pollutant that it would have the potential to emit
				in a significant amount.
(3) For a
				major modification, the analysis shall address each pollutant for which it
				would result in a significant net emissions increase.
(4) With respect to any such pollutant for
				which no national ambient air quality standard exists, the analysis shall
				contain such air quality monitoring data as the department determines is
				necessary to assess ambient air quality for that pollutant in any area that the
				emissions of that pollutant would affect.
(5) With respect to any such pollutant (other
				than nonmethane hydrocarbons) for which such a standard does exist, the
				analysis shall contain continuous air quality monitoring data gathered for
				purposes of determining whether emissions of that pollutant would cause or
				contribute to a violation of the standard or any maximum allowable
				increase.
(6) The continuous air
				monitoring data that is required under this rule shall have been gathered over
				a period of one year and shall represent the year preceding receipt of the
				application, except that, if the department determines that a complete and
				adequate analysis can be accomplished with monitoring data gathered over a
				period shorter than one year (but not to be less than four months), the data
				that is required shall have been gathered over at least that shorter
				period.
(7) The owner or operator
				of a proposed major stationary source or major modification of volatile organic
				compounds who satisfies all conditions of subchapter 9 may provide
				post-approval monitoring data for ozone in lieu of providing preconstruction
				data as required under (1).
(8) The
				owner or operator of a major stationary source or major modification shall,
				after construction of the stationary source or modification, conduct such
				ambient monitoring as the department determines is necessary to determine the
				effect emissions from the stationary source or modification may have, or are
				having, on air quality in any area.
(9) Nitrogen oxides are presumed to be
				precursors to PM-2.5 in an area, unless the applicant demonstrates that
				emissions of nitrogen oxides from sources in the area are not a significant
				contributor to that area's ambient PM-2.5 concentrations.
(10) Volatile organic compounds and ammonia
				are presumed not to be precursors to PM-2.5 unless emissions of volatile
				organic compounds or ammonia from sources in the area are a significant
				contributor to that area's ambient PM-2.5 concentrations.
(11) PM-2.5 emissions and PM-10 emissions
				include gaseous emissions from a source or activity that condense to form
				particulate matter at ambient temperatures.
(12) Applicability determinations for PM-2.5
				made prior to January 1, 2011, without accounting for condensable particulate
				matter, are not subject to (11).
75-2-111,
					 75-2-203, MCA; IMP,
					 75-2-202,
					 75-2-203,
					 75-2-204,
					 MCA;