Washington Administrative Code › Title - Northwest Clean Air Agency › 200 - DEFINITIONS › Sec2 200 - DEFINITIONS

Current through Register Vol. 24-14, July 15, 2024
ACTUAL EMISSIONS
- The actual rate of
				emissions of a pollutant from an emission unit, as determined in accordance
				with a) through c) of this definition.
a) In general, the actual emissions as of a
			 particular date shall equal the average rate, in tons per year, at which the
			 emissions unit actually emitted the pollutant during a two-year period which
			 precedes the particular date and which is representative of normal stationary
			 source operation. The NWCAA shall allow the use of a different time period upon
			 a determination by the NWCAA that it is more representative of normal
			 stationary source operation. Actual emissions shall be calculated using the
			 emissions unit's actual operating hours, production rates, and types of
			 materials processed, stored, or combusted during the selected time
			 period.
b) The NWCAA may presume
			 that stationary source-specific allowable emissions for the unit are equivalent
			 to the actual emissions of the emissions unit.
c) For any emissions unit which has not begun
			 normal operations on the particular date, actual emissions shall equal the
			 potential to emit of the emissions unit on that date.
ADVERSE IMPACT ON VISIBILITY
- Adverse
				impact on visibility is defined in WAC 173-400-117.
AIR CONTAMINANT
- Dust, fumes, mist,
				smoke, other particulate matter, vapor gas, odorous substance, or any
				combination thereof. "Air pollutant" means the same as "air
				contaminant."
AIR POLLUTION
- The presence in the
				outdoor atmosphere of one or more air contaminants in sufficient quantities and
				of such characteristics and duration as is, or is likely to be, injurious to
				human health, plant, or animal life, or property, or which unreasonably
				interfere with enjoyment of life and property. For the purposes of this
				regulation, air pollution shall not include air contaminants emitted in
				compliance with chapter 17.21 RCW, the Washington Pesticide Application Act,
				which regulates the application and control of the use of various
				pesticides.
AIR QUALITY OBJECTIVE
- The
				concentration and exposure time of one or more air contaminants in the ambient
				air below which, according to available knowledge, undesirable effects will not
				occur.
AIR QUALITY STANDARD
- An established
				concentration, exposure time and frequency of occurrence of one or more air
				contaminants in the ambient air which shall not be exceeded.
ALLOWABLE EMISSIONS
- The emission
				rate of a stationary source calculated using the maximum rated capacity of the
				stationary source (unless the stationary source is subject to federally
				enforceable limits which restrict the operating rate, or hours of operation, or
				both) and the most stringent of the following:
a) The applicable standards as in 40 CFR Part
			 60, 61 or 63;
b) Any applicable SIP
			 emissions limitation including those with a future compliance date;
			 or
c) The emissions rate specified
			 as a federally enforceable permit condition, including those with a future
			 compliance date.
AMBIENT AIR
- The surrounding outside
				air.
AMBIENT AIR QUALITY STANDARD
- An
				established concentration, exposure time and frequency of occurrence of one or
				more air contaminant(s) in the ambient air which shall not be exceeded.
AMBIENT AIR MONITORING STATION
- A
				station so designated by the Control Officer for the purpose of measuring air
				contaminant concentrations in the ambient air. The station location and
				sampling probe locations shall be designated by the Control Officer utilizing
				as a guide  40 CFR Part 58, Appendix "D" Network Design and Appendix "E" Probe
				Siting Criteria.
ATTAINMENT AREA
- A geographic area
				designated by EPA at   40 CFR Part 81   as having attained the National Ambient Air
				Quality Standard (NAAQS) for a given criteria pollutant.
BEGIN ACTUAL CONSTRUCTION
- In
				general, initiation of physical on-site construction activities on an emission
				unit which are of a permanent nature. Such activities include, but are not
				limited to, installation of building supports and foundations, laying
				underground pipe work and construction of permanent storage structures. With
				respect to a change in method of operation, this term refers to those on-site
				activities other than preparatory activities which mark the initiation of the
				change.
BEST AVAILABLE CONTROL TECHNOLOGY
				(BACT)
- An emission limitation based on the maximum degree of
				reduction for each air pollutant subject to regulation under chapter 70.94 RCW
				emitted from or which results from any new or modified stationary source, which
				the NWCAA, on a case-by-case basis, taking into account energy, environmental,
				and economic impacts, and other costs, determines is achievable for such
				stationary source or modification through application of production processes
				and available methods, systems, and techniques, including fuel cleaning, clean
				fuels, or treatment or innovative fuel combustion techniques for control of
				each such pollutant. In no event shall application of the "Best Available
				Control Technology" result in emissions of any pollutants which will exceed the
				emissions allowed by any applicable standard under 40 CFR Parts 60, 61, and 63.
				Emissions from any stationary source utilizing clean fuels, or any other means,
				to comply with this paragraph shall not be allowed to increase above levels
				that would have been required under the definition of BACT in the Federal Clean
				Air Act as it existed prior to enactment of the Clean Air Act Amendments of
				1990.
BOARD
- Board of Directors of the
				NWCAA.
BUBBLE
- A set of emission limits
				which allows an increase in emissions from a given emissions unit in exchange
				for a decrease in emissions from another emissions unit, pursuant to RCW  70.94.155 and WAC 173-400-120.
BUSINESS ESTABLISHMENT
- A facility
				and/or place where commercial and/or professional dealings are
				conducted.
CATALYTIC CRACKING UNIT
- A petroleum
				refinery cracking unit of the fluid or compact moving bed type consisting of a
				reactor, regenerator and fractionating tower and, where employed, a carbon
				monoxide boiler.
CLASS I AREA
- Any area designated
				under section 162 or 164 of the Federal Clean Air Act as a Class I area. The
				following areas are the Class I areas in Washington state:
a) Alpine Lakes Wilderness;
b) Glacier Peak Wilderness;
c) Goat Rocks Wilderness;
d) Mount Adams Wilderness;
e) Mount Rainier National Park;
f) North Cascades National Park;
g) Olympic National Park;
h) Pasayten Wilderness; and
i) Spokane Indian Reservation
COMBUSTION and INCINERATION UNITS
-
				Units using combustion for waste disposal, steam production, chemical recovery
				or other process requirements; but excludes open burning.
COMMENCED
-
a) Commenced as applied to construction,
			 means that the owner or operator has all the necessary preconstruction
			 approvals or permits and either has:
1) Begun,
			 or caused to begin, a continuous program of actual on-site construction of the
			 stationary source, to be completed within a reasonable time; or
2) Entered into binding agreements or
			 contractual obligations, which cannot be cancelled or modified without
			 substantial loss to the owner or operator, to undertake a program of actual
			 construction of the stationary source to be completed within a reasonable time.