Wyoming Administrative Code › Agency 020 - Environmental Quality, Dept. of › Sub-Agency 0002 - Air Quality › Chapter 9 - VISIBILITY IMPAIRMENT/PM FINE CONTROL › Section 9-2 - Visibility

Current through July 13, 2024
(a)
Purpose.
This section assures reasonable progress towards the national
				  goal of preventing future, and remedying existing, visibility impairment in
				  Class I areas.
(b)
Applicability.
This section applies to all Class I areas in the State of
				  Wyoming as designated per Chapter 6, Section
				  4(c) or redesignated in
				  accordance with Chapter 6, Section
				  4(d) of these Regulations
				  and to sources in Wyoming the emissions from which may reasonably be
				  anticipated to cause or contribute to any impairment of visibility in any such
				  area including mandatory Federal Class I areas in any other State.
(c)
Definitions
				and Abbreviations.
The following terms are explicitly defined for use in this
				  section. As used in this section, all terms not defined herein shall have the
				  meaning given to them in Chapter 6, Section
				  4.
(i)
"Adverse impact on
				visibility"
means, for the purposes of Chapter 9, Section
				2(e), visibility impairment
				which interferes with the management, protection, preservation, or enjoyment of
				the visitor's visual experience of the Class I area. Any determination shall be
				made on a case-by-case basis taking into account the geographic extent,
				intensity, duration, frequency and time of visibility impairments, and how
				these factors correlate with times of visitor use of the Class I area, and the
				frequency and timing of natural conditions that reduce visibility.
(ii)
"Best Available Retrofit
				Technology (BART)"
means that emission reduction control
				device, facility, method, or system, used to achieve the best continuous
				emission reduction for each pollutant emitted by an existing stationary
				facility. The emission limitation shall be established on a case-by-case basis
				taking into consideration the technology available, the costs of compliance,
				the energy and non-air quality environmental impacts of compliance, any
				pollution control equipment in use or in existence at the source, the remaining
				useful life of the source, and the degree of improvement in visibility which
				may reasonably be anticipated to result from the use of such
				technology.
(iii)
"Class I areas"
means, for the purposes of this section, all
				mandatory Class I Federal areas established in the Clean Air Act Amendments of
				1977 and include the following for the State of Wyoming: Yellowstone National
				Park, Teton National Park, North Absoroka Wilderness, Washakie Wilderness,
				Teton Wilderness, Bridger Wilderness, and Fitzpatrick Wilderness. Such term
				also includes the Savage Run Wilderness which is not a mandatory Class I
				Federal area and any future Class I area redesignated in accordance with
				Chapter 6, Section
				4(d) of these
				regulations.
(iv)
"Existing stationary facility"
means any of the stationary
				sources of air pollutants listed in Chapter 6, Section
				4(a)(i) of this Regulation,
				including any reconstructed source, which was not in operation prior to August
				7, 1962, and has the potential to emit 250 tons per year or more of any air
				pollutant. In determining potential to emit, fugitive emissions, to the extent
				quantifiable shall be counted.
(v)
"Long term strategy"
means a 10- to 15-year
				plan for making reasonable progress toward the national goal specified in
				Chapter 9, Section
				2(a).
(vi)
"Natural
				conditions"
includes naturally occurring phenomena that reduce
				visibility as measured in terms of visual range, contrast, or
				coloration.
(vii)
"Reasonably attributable"
means attributable by visual
				observation or any other technique the State deems appropriate.
(viii)
"Significant
				impairment"
means visibility impairment, which in the judgment
				of the Administrator, interferes with the visitor's visual experience of the
				Class I area. This determination must be made on a case-by-case basis taking
				into account the geographic extent, intensity, duration, frequency and time of
				the impairment, and how these factors correlate with times of use of the Class
				I area and the frequency and timing of natural conditions that reduce
				visibility.
(ix)
"Visibility impairment"
means any humanly perceptible change in
				visibility (visual range, contrast, coloration) from that which would have
				existed under natural conditions.