(u) fossil fuel boilers, or combination thereof, totaling more than 250 million British Thermal Units per hour heat input;(v) petroleum storage and transfer units with a total storage capacity exceeding 300,000 barrels;
(w) taconite ore processing plants;
(x) glass fiber processing plants;
(y) charcoal production plants;
(z) fossil fuel-fired steam-electric plants of more than 250 million British Thermal Units per hour heat input; or
(aa) any other stationary source category which, as of August 7, 1980, is being regulated under Section 111 or 112 of the federal Clean Air Act.
"Modification" means any planned change in a source which results in a potential increase of emissions.
"National Ambient Air Quality Standards (NAAQS)" means the allowable concentrations of air pollutants in the ambient air specified by the federal government, see Title 40, Code of Federal Regulations, Part 50.
"Net Emissions Increase" means the amount by which the sum of the following exceeds zero:
(1) any increase in actual emissions from a particular physical change or change in method of operation at a source; and
(2) any other increases and decreases in actual emissions at the source that are contemporaneous with the particular change and are otherwise creditable. For purposes of determining a "net emissions increase":
(a) an increase or decrease in actual emissions is contemporaneous with the increase from the particular change only if it occurs between the date five years before construction on the particular change commences; and the date that the increase from the particular change occurs;
(b) an increase or decrease in actual emissions is creditable only if it has not been relied on in issuing a prior approval for the source which approval is in effect when the increase in actual emissions for the particular change occurs;
(c) an increase or decrease in actual emissions of sulfur dioxide, nitrogen oxides, or particulate matter which occurs before an applicable minor source baseline date is creditable only if it is required to be considered in calculating the amount of maximum allowable increases remaining available and with respect to particulate matter, only PM10 emissions will be used to evaluate this increase or decrease;
(d) an increase in actual emissions is creditable only to the extent that the new level of actual emissions exceeds the old level;
(e) a decrease in actual emissions is creditable only to the extent that:
(i) the old level of actual emissions or the old level of allowable emissions, whichever is lower, exceeds the new level of actual emissions;
(ii) it is enforceable at and after the time that actual construction on the particular change begins;
(iii) it has about the same qualitative significance for public health and welfare as that attributed to the increase from the particular change; and
(iv) it has not been relied on in issuing any permit under Rule R307-401 nor has it been relied on in demonstrating attainment or reasonable further progress.
(f) an increase that results from a physical change at a source occurs when the emissions unit on which construction occurred becomes operational and begins to emit a particular pollutant and any replacement unit that requires shakedown becomes operational only after a reasonable shakedown period, not to exceed 180 days.
"New Installation" means an installation or construction of which began after the effective date of any regulation having application to it.
"Nonattainment Area" means an area designated by the Environmental Protection Agency as nonattainment under Section 107, Clean Air Act for any National Ambient Air Quality Standard. The designations for Utah are listed in 40 CFR 81.345.
"Offset" means an amount of emission reduction, by a source, greater than the emission limitation imposed on the source by this rule, the State Implementation Plan, or both.
"Opacity" means the capacity to obstruct the transmission of light, expressed as a percentage.
"Open Burning" means any burning of combustible materials resulting in emissions of products of combustion into ambient air without passage through a chimney or stack.
"Owner or Operator" means any person who owns, leases, controls, operates or supervises a facility, an emission source, or air pollution control equipment.
"PSD Area" means an area designated as attainment or unclassifiable under Section 107(d)(1)(D) or Section 107(d)(1)(E) of the federal Clean Air Act. "PM2.5" means particulate matter with an aerodynamic diameter less than or equal to a nominal 2.5 micrometers as measured by an EPA reference or equivalent method.
"PM2.5 Precursor" means any chemical compound or substance which, after it has been emitted into the atmosphere, undergoes chemical or physical changes that convert it into particulate matter, specifically PM2.5.
(1) Specifically, Sulfur dioxide, Nitrogen oxides, Volatile organic compounds, and Ammonia are precursors to PM2.5 in any PM2.5 nonattainment area, except where the Administrator of the EPA has approved a demonstration satisfying 40 CFR 51.1006(a)(3) which has, for a particular PM2.5 nonattainment area, determined otherwise.
(2) The following denote specific nonattainment areas, as defined in the July 1, 2017, version of 40 CFR 81.345, within which certain pollutants [identified in Subsection (1) ]are exempted from the definition of PM2.5 precursor for the purposes of 40 CFR 51.165: In the Logan Utah-Idaho PM2.5 nonattainment area, Ammonia is exempted. "PM10" means particulate matter with an aerodynamic diameter less than or equal to a nominal ten micrometers as measured by an EPA reference or equivalent method.
"PM10 Precursor" means any chemical compound or substance which, after it has been emitted into the atmosphere, undergoes chemical or physical changes that convert it into particulate matter, specifically PM10.
"Part 70 Source" means any source subject to the permitting requirements of Rule R307-415.
"Person" means an individual, trust, firm, estate, company, corporation, partnership, association, state, state or federal agency or entity, municipality, commission, or political subdivision of a state. See Subsection 19-2-103(4).
"Pollution Control Project" means any activity or project at an existing electric utility steam generating unit for purposes of reducing emissions from a unit. Activities or projects are limited to:
(1) the installation of conventional or innovative pollution control technology, including advanced flue gas desulfurization, sorbent injection for sulfur dioxide and nitrogen oxide controls, and electrostatic precipitators;
(2) an activity or project to accommodate switching to a fuel which is less polluting than the fuel used before the activity or project, including natural gas or coal reburning, or the cofiring of natural gas and other fuels for controlling emissions;
