Definitions

The following words and terms when used in this Part shall have the following meaning, unless the context clearly indicates otherwise. All terms used in this Part that are not defined in this Section shall have the meaning given to them in OAC 252:100-1-3, 252:100-8-1.1, or in the Oklahoma Clean Air Act. "Actual emissions" means the actual rate of emissions of a regulated NSR pollutant from an emissions unit, as determined in accordance with paragraphs (A) through (C) of this definition, except that this definition shall not apply for calculating whether a significant emissions increase has occurred, or for establishing a PAL under OAC 252:100-8-38. Instead, the definitions of "projected actual emissions" and "baseline actual emissions" shall apply for those purposes. (A) In general, actual emissions as of a particular date shall equal the average rate in TPY at which the unit actually emitted the pollutant during a consecutive 24-month period which precedes the particular date and which is representative of normal source operation. The Director shall allow the use of a different time period upon a determination that it is more representative of normal source operation. Actual emissions shall be calculated using the unit's actual operating hours, production rates, and types of materials processed, stored, or combusted during the selected time period. (B) The Director may presume that source-specific allowable emissions for the unit are equivalent to the actual emissions of the unit. (C) For any emissions unit that has not begun normal operations on the particular date, actual emissions shall equal the potential to emit of the unit on that date. "Allowable emissions" means the emission rate of a stationary source calculated using the maximum rated capacity of the source (unless the source is subject to 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 set forth in 40 CFR Parts 60 and 61; (B) the applicable State rule allowable emissions; or, (C) the emissions rate specified as an enforceable permit condition. "Baseline actual emissions" means the rate of emissions, in TPY, of a regulated NSR pollutant, as determined in accordance with paragraphs (A) through (E) of this definition. (A) The baseline actual emissions shall be based on current emissions data and the unit's utilization during the period chosen. Current emission data means the most current and accurate emission factors available and could include emissions used in the source's latest permit or permit application, the most recent CEM data, stack test data, manufacturer's data, mass balance, engineering calculations, and other emission factors. (B) For any existing electric utility steam generating unit (EUSGU), baseline actual emissions means the average rate, in TPY, at which the unit actually emitted the pollutant during any consecutive 24-month period selected by the owner or operator within the 5- year period immediately preceding the date that a complete permit application is received by the Director for a permit required under OAC 252:100-8. The Director shall allow the use of a different time period upon a determination that it is more representative of normal source operation. (i) The average rate shall include fugitive emissions to the extent quantifiable, and emissions associated with start-ups, shutdowns, and malfunctions. (ii) The average rate shall be adjusted downward to exclude any noncompliant emissions that occurred while the source was operating above an emission limitation that was legally enforceable during the consecutive 24-month period. 2024_Oct_AQAC_SC_5_7_8_RUL_Presented 33 October 15, 2024 (iii) For a regulated NSR pollutant, when a project involves multiple emissions units, only one consecutive 24-month period shall be used to determine the baseline actual emissions for all the emissions units affected by the project. A different consecutive 24-month period can be used for each regulated NSR pollutant. (iv) The average rate shall not be based on any consecutive 24-month period for which there is inadequate information for determining annual emissions, in TPY, and for adjusting this amount if required by (B)(ii) of this definition. (C) For an existing emissions unit (other than an EUSGU), baseline actual emissions means the average rate in TPY, at which the emissions unit actually emitted the pollutant during any consecutive 24-month period selected by the owner or operator within the 10- year period immediately preceding either the date the owner or operator begins actual construction of the project, or the date a complete permit application is received by the Director for a permit required either under this Part or under a plan approved by the Administrator, whichever is earlier, except that the 10 year period shall not include any period earlier than November 15, 1990. (i) The average rate shall include fugitive emissions to the extent quantifiable, and emissions associated with startups, shutdowns, and malfunctions. (ii) The average rate shall be adjusted downward to exclude any noncompliant emissions that occurred while the source was operating above an emission limitation that was legally enforceable during the consecutive 24-month period. (iii) The average rate shall be adjusted downward to exclude any emissions that would have exceeded an emission limitation with which the major stationary source must currently comply, had such major stationary source been required to comply with such limitations during the consecutive 24-month period. However, if an emission limitation is part of a MACT standard that the Administrator proposed or promulgated under 40 CFR 63, the baseline actual emissions need only be adjusted if DEQ has taken credit for such emissions reduction in an attainment demonstration or maintenance plan consistent with requirements of 40 CFR 51.165(a)(3)(ii)(G). (iv) For a regulated NSR pollutant, when a project involves multiple emissions units, only one consecutive 24-month period must be used to determine the baseline actual emissions for the emissions units being changed. A different consecutive 24-month period can be used for each regulated NSR pollutant. (v) The average rate shall not be based on any consecutive 24-month period for which there is inadequate information for determining annual emissions, in TPY, and for adjusting this amount if required by (C)(ii) and (iii) of this definition. (D) For a new emissions unit, the baseline actual emissions for purposes of determining the emissions increase that will result from the initial construction and operation of such unit shall equal zero; and thereafter, for all other purposes, shall equal the unit's potential to emit. (E) For a PAL for a stationary source, the baseline actual emissions shall be calculated for existing EUSGU in accordance with the procedures contained in paragraph (B) of this definition, for other existing emissions units in accordance with the procedures contained in Paragraph (C) of this definition, and for a new emissions unit in accordance with the procedures contained in paragraph (D) of this definition. "Baseline area" means any intrastate areas (and every part thereof) designated as attainment or unclassifiable under section 107(d)(1)(A)(ii) or (iii) of the Act in which the major source or 2024_Oct_AQAC_SC_5_7_8_RUL_Presented 34 October 15, 2024 major modification establishing the minor source baseline date would construct or would have an air quality impact for the pollutant for which the baseline date is established, as follows: Equal to or greater than 1 μg/m3 (annual average) for SO2, NO2, or PM10; or equal or greater than 0.3 μg/m3 (annual average) for PM2.5. (A) Area redesignations under section 107(d)(1)(A)(ii) or (iii) of the Act cannot intersect or be smaller than the area of impact of any major stationary source or major modification which: (i) establishes a minor source baseline date; or (ii) is subject to 40 CFR 52.21 or OAC 252:100-8, Part 7, and would be constructed in the same State as the State proposing the redesignation. (B) Any baseline area established originally for the TSP increments shall remain in effect and shall apply for purposes of determining the amount of available PM10 increments, except that such baseline area shall not remain in effect if the Director rescinds the corresponding minor source baseline date in accordance with paragraph (D) of the definition of "baseline date". "Baseline concentration" means that ambient concentration level that exists in the baseline area at the time of the applicable minor source baseline date. (A) A baseline concentration is determined for each pollutant for which a minor source baseline date is established and shall include: (i) the actual emissions representative of sources in existence on the applicable minor source baseline date, except as provided in (B) of this definition. (ii) the allowable emissions of major stationary sources that commenced construction before the major source baseline date, but were not in operation by the applicable minor source baseline date. (B) The following will not be included in the baseline concentration and will affect the applicable maximum allowable increase(s): (i) actual emissions from any major stationary source on which construction commenced after the major source baseline date; and, (ii) actual emissions increases and decreases at any stationary source occurring after the minor source baseline date. "Baseline date" means: (A) Major source baseline date means: (i) in the case of PM10 and sulfur dioxide, January 6, 1975; (ii) in the case of nitrogen dioxide, February 8, 1988; and (iii) in the case of PM2.5, October 20, 2010. (B) Minor source baseline date means the earliest date after the trigger date on which a major stationary source or major modification (subject to 40 CFR 52.21 or OAC 252:100- 8, Part 7) submits a complete application. The trigger date is: (i) in the case of PM10 and sulfur dioxide, August 7, 1977; (ii) in the case of nitrogen dioxide, February 8, 1988; and (iii) in the case of PM2.5, October 20, 2011. (C) The baseline date is established for each pollutant for which increments or other equivalent measures have been established if: (i) the area in which the proposed source or modification would construct is designated as attainment or unclassifiable under section 107(d)(1)(A)(ii) or (iii) of the Act for the 2024_Oct_AQAC_SC_5_7_8_RUL_Presented 35 October 15, 2024 pollutant on the date of its complete application under 40 CFR 52.21 or under OAC 252:100-8, Part 7; and (ii) in the case of a major stationary source, the pollutant would be emitted in significant amounts, or, in the case of a major modification, there would be a significant net emissions increase of the pollutant. (D) Any minor source baseline date established originally for the TSP increments shall remain in effect and shall apply for purposes of determining the amount of available PM10 increments, except that the Director may rescind any such minor source baseline date where it can be shown, to the satisfaction of the Director, that the emissions increase from the major stationary source, or the net emissions increase from the major modification, responsible for triggering that date did not result in a significant amount of PM10 emissions. "Begin actual construction" means in general, initiation of physical on-site construction activities on an emissions unit which are of a permanent nature. (A) Such activities include, but are not limited to, installation of building supports and foundations, laying of underground pipework, and construction of permanent storage structures. (B) 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" or "BACT" means an emissions limitation (including a visible emissions standard) based on the maximum degree of reduction for each regulated NSR pollutant which would be emitted from any proposed major stationary source or major modification which the Director, on a case-by-case basis, taking into account energy, environmental, and economic impacts and other costs, determines is achievable for such source or modification through application of production processes or available methods, systems, and techniques, including fuel cleaning or treatment or innovative fuel combination techniques for control of such pollutant. In no event shall application of BACT result in emissions of any pollutant which would exceed the emissions allowed by any applicable standard under 40 CFR parts 60 and 61. If the Director determines that technological or economic limitations on the application of measurement methodology to a particular emissions unit would make the imposition of an emissions standard infeasible, a design, equipment, work practice, operational standard or combination thereof, may be prescribed instead to satisfy the requirement for the application of BACT. Such standard shall, to the degree possible, set forth the emissions reduction achievable by implementation of such design, equipment, work practice or operation, and shall provide for compliance by means which achieve equivalent results. "Clean coal technology" means any technology, including technologies applied at the precombustion, combustion, or post combustion stage, at a new or existing facility which will achieve significant reductions in air emissions of sulfur dioxide or oxides of nitrogen associated with the utilization of coal in the generation of electricity, or process steam which was not in widespread use as of November 15, 1990. "Clean coal technology demonstration project" means a project using funds appropriated under the heading "Department of Energy-Clean Coal Technology", up to a total amount of $2,500,000,000 for commercial demonstration of clean coal technology, or similar projects funded through appropriations for the EPA. The Federal contribution for a qualifying project shall be at least 20% of the total cost of the demonstration project. 2024_Oct_AQAC_SC_5_7_8_RUL_Presented 36 October 15, 2024 "Commence" means, as applied to construction of a major stationary source or major modification, that the owner or operator has all necessary preconstruction approvals or permits and either has: (A) begun, or caused to begin, a continuous program of actual on-site construction of the source, to be completed within a reasonable time; or, (B) 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 source to be completed within a reasonable time. "Construction" means any physical change or change in the method of operation (including fabrication, erection, installation, demolition, or modification of an emissions unit) that would result in a change in emissions. "Continuous emissions monitoring system" or "CEMS" means all of the equipment that may be required to meet the data acquisition and availability requirements to sample, condition (if applicable), analyze, and provide a record of emissions on a continuous basis. "Continuous emissions rate monitoring system" or "CERMS" means the total equipment required for the determination and recording of the pollutant mass emissions rate (in terms of mass per unit of time). "Continuous parameter monitoring system" or "CPMS" means all of the equipment necessary to meet the data acquisition and availability requirements to monitor process and control device operational parameters (for example, control device secondary voltages and electric currents) and other information (for example, gas flow rate, O2, or CO2 concentrations), and to record average operational parameter value(s) on a continuous basis. "Electric utility steam generating unit" or "EUSGU" means any steam electric generating unit that is constructed for the purpose of supplying more than one-third of its potential electric output capacity and more than 25 MW electrical output to any utility power distribution system for sale. Any steam supplied to a steam distribution system for the purpose of providing steam to a steam-electric generator that would produce electrical energy for sale is also considered in determining the electrical energy output capacity of the affected facility. "Emissions unit" means any part of a stationary source that emits or would have the potential to emit any regulated NSR pollutant and includes an EUSGU. There are two types of emissions units as described in paragraphs (A) and (B) of this definition. (A) A new emissions unit is any emissions unit that is (or will be) newly constructed and that has existed for less than 2 years from the date such emissions unit first operated. (B) An existing emissions unit is any emissions unit that does not meet the requirements in paragraph (A) of this definition. A replacement unit is an existing emissions unit. "Federal Land Manager" means with respect to any lands in the United States, the Secretary of the department with authority over such lands. "High terrain" means any area having an elevation 900 feet or more above the base of the stack of a source. "Innovative control technology" means any system of air pollution control that has not been adequately demonstrated in practice, but would have a substantial likelihood of achieving greater continuous emissions reduction than any control system in current practice or of achieving at least comparable reductions at lower cost in terms of energy, economics, or non-air quality environmental impacts. "Low terrain" means any area other than high terrain. 2024_Oct_AQAC_SC_5_7_8_RUL_Presented 37 October 15, 2024 "Major modification" means: (A) Any physical change in or change in the method of operation of a major stationary source that would result in a significant emissions increase of a regulated NSR pollutant and a significant net emissions increase of that pollutant from the major stationary source is a major modification. (i) Any significant emissions increase from any emissions units or net emissions increase at a major stationary source that is significant for VOC or NOX shall be considered significant for ozone. (ii) A physical change or change in the method of operation shall not include: (I) routine maintenance, repair and replacement; (II) use of an alternative fuel or raw material by reason of any order under sections 2(a) and (b) of the Energy Supply and Environmental Coordination Act of 1974 (or any superseding legislation) or by reason of a natural gas curtailment plan pursuant to the Federal Power Act; (III) use of an alternative fuel by reason of an order or rule under section 125 of the Act; (IV) use of an alternative fuel at a steam generating unit to the extent that the fuel is generated from municipal solid waste; (V) use of an alternative fuel or raw material by a stationary source which the source was capable of accommodating before January 6, 1975, (unless such change would be prohibited under any enforceable permit condition which was established after January 6, 1975) or the source is approved to use under any permit issued under 40 CFR 52.21 or OAC 252:100-7 or 252:100-8; (VI) an increase in the hours of operation or in the production rate, unless such change would be prohibited under any federally enforceable permit condition which was established after January 6, 1975; (VII) any change in source ownership; (VIII) the installation, operation, cessation, or removal of a temporary clean coal technology demonstration project, provided the project complies with OAC 252:100 and other requirements necessary to attain and maintain the NAAQS during the project and after it is terminated; (IX) the installation or operation of a permanent clean coal technology demonstration project that constitutes repowering, provided that the project does not result in an increase in the potential to emit of any regulated pollutant (on a pollutant-by-pollutant basis) emitted by the unit; or (X) the reactivation of a very clean coal-fired EUSGU. (B) This definition shall not apply with respect to a particular regulated NSR pollutant when the major stationary source is complying with the requirements under OAC 252:100- 8-38 for a PAL for that pollutant. Instead, the definition of "PAL major modification" at 40 CFR 51.166(w)(2)(viii) shall apply. "Major stationary source" means (A) A major stationary source is: (i) any of the following stationary sources of air pollutants which emits, or has the potential to emit, 100 TPY or more of a regulated NSR pollutant (except for GHGs, either as individual pollutants or as an aggregate): (I) carbon black plants (furnace process), 2024_Oct_AQAC_SC_5_7_8_RUL_Presented 38 October 15, 2024 (II) charcoal production plants, (III) chemical process plants, (not including ethanol production facilities that produce ethanol by natural fermentation included in NAICS codes 325193 or 312140), (IV) coal cleaning plants (with thermal dryers), (V) coke oven batteries, (VI) fossil-fuel boilers (or combination thereof) totaling more than 250 million BTU per hour heat input, (VII) fossil fuel-fired steam electric plants of more than 250 million BTU per hour heat input, (VIII) fuel conversion plants, (IX) glass fiber processing plants, (X) hydrofluoric, sulfuric or nitric acid plants, (XI) iron and steel mill plants, (XII) kraft pulp mills, (XIII) lime plants, (XIV) municipal incinerators capable of charging more than 25050 tons of refuse per day, (XV) petroleum refineries, (XVI) petroleum storage and transfer units with a total storage capacity exceeding 300,000 barrels, (XVII) phosphate rock processing plants, (XVIII) portland cement plants, (XIX) primary aluminum ore reduction plants, (XX) primary copper smelters, (XXI) primary lead smelters, (XXII) primary zinc smelters, (XXIII) secondary metal production plants, (XXIV) sintering plants, (XXV) sulfur recovery plants, or (XXVI) taconite ore processing plants; (ii) any other stationary source not on the list in (A)(i) of this definition which emits, or has the potential to emit, 250 TPY or more of a regulated NSR pollutant (except for GHGs, either as individual pollutants or as an aggregate); (iii) any physical change that would occur at a stationary source not otherwise qualifying as a major stationary source under this definition if the change would constitute a major stationary source by itself. (B) A major source that is major for VOC or NOX shall be considered major for ozone. (C) The fugitive emissions of a stationary source shall not be included in determining for any of the purposes of this Part whether it is a major stationary source, unless the source belongs to one of the following categories of stationary sources: (i) the stationary sources listed in (A)(i) of this definition; (ii) any other stationary source category which, as of August 7, 1980, is being regulated under section 111 or 112 of the Act. "Necessary preconstruction approvals or permits" means those permits or approvals required under all applicable air quality control laws and rules. 2024_Oct_AQAC_SC_5_7_8_RUL_Presented 39 October 15, 2024 "Net emissions increase" means: (A) with respect to any regulated NSR pollutant emitted by a major stationary source, the amount by which the sum of the following exceeds zero: (i) the increase in emissions from a particular physical change or change in the method of operation at a stationary source as calculated pursuant to OAC 252:100-8-30(b); and, (ii) any other increases and decreases in actual emissions at the major stationary source that are contemporaneous with the particular change and are otherwise creditable. Baseline actual emissions for calculating increases and decreases under (A)(ii) of this definition shall be determined as provided in the definition of "baseline actual emissions", except that (B)(iii) and (C)(iv) of that definition shall not apply. (B) An increase or decrease in actual emissions is contemporaneous with the increase from the particular change only if it occurs within 3 years before the date that the increase from the particular change occurs. (C) An increase or decrease in actual emissions is creditable only if: (i) it is contemporaneous; and (ii) The Director has not relied on it in issuing a permit for the source under OAC 252:100-8, Part 7, which permit is in effect when the increase in actual emissions from the particular change occurs. (D) An increase or decrease in actual emissions of sulfur dioxide, particulate matter, or nitrogen oxides that occurs before the 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. (E) An increase in actual emissions is creditable only to the extent that the new level of actual emissions exceeds the old level. (F) A decrease in actual emissions is creditable only to the extent that it meets all the conditions in (F)(i) through (iii) of this definition. (i) It is creditable if 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 creditable if it is enforceable as a practical matter at and after the time that actual construction on the particular change begins. (iii) It is creditable if it has approximately the same qualitative significance for public health and welfare as that attributed to the increase from the particular change. (G) 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. Any replacement unit that requires shakedown becomes operational only after a reasonable shakedown period, not to exceed 180 days. (H) Paragraph (A) of the definition of "actual emissions" shall not apply for determining creditable increases and decreases. "Potential to emit" means the maximum capacity of a stationary source to emit a pollutant under its physical and operational design. Any physical or operational limitation on the capacity of the source to emit a pollutant, including air pollution control equipment and restrictions on hours of operation or on the type or amount of material combusted, stored or processed, shall be treated as part of its design if the limitation or the effect it would have on emissions is enforceable. Secondary emissions do not count in determining the potential to emit of a stationary source. "Predictive emissions monitoring system" or "PEMS" means all of the equipment necessary to monitor process and control device operational parameters (for example, control 2024_Oct_AQAC_SC_5_7_8_RUL_Presented 40 October 15, 2024 device secondary voltages and electric currents) and other information (for example, gas flow rate, O2, or CO2 concentrations), and calculate and record the mass emissions rate (for example, lb/hr) on a continuous basis. "Prevention of Significant Deterioration (PSD) program" means a major source preconstruction permit program that has been approved by the Administrator and incorporated into the plan to implement the requirements of 40 CFR 51.166, or the program in 40 CFR 52.21. Any permit issued under such a program is a major NSR permit. "Project" means a physical change in, or change in method of operation of, an existing major stationary source. "Projected actual emissions" means (A) Projected actual emissions means the maximum annual rate, in TPY, at which an existing emissions unit is projected to emit a regulated NSR pollutant in any one of the 5 years (12-month period) following the date the unit resumes regular operation after the project, or in any one of the 10 years following that date, if the project involves increasing the emissions unit's design capacity or its potential to emit that regulated NSR pollutant, and full utilization of the unit would result in a significant emissions increase, or a significant net emissions increase at the major stationary source. (B) In determining the projected actual emissions under paragraph (A) of this definition (before beginning actual construction), the owner or operator of the major stationary source: (i) shall consider all relevant information, including but not limited to, historical operational data, the company's own representations, the company's expected business activity and the company's highest projections of business activity, the company's filings with the State or Federal regulatory authorities, and compliance plans under the approved plan; and (ii) shall include fugitive emissions to the extent quantifiable and emissions associated with start-ups, shutdowns, and malfunctions; and (iii) shall exclude, in calculating any increase in emissions that results from the particular project, that portion of the unit's emissions following the project that an existing unit could have accommodated during the consecutive 24-month period used to establish the baseline actual emissions and that are also unrelated to the particular project, including any increased utilization due to product demand growth; or, (iv) in lieu of using the method set out in (B)(i) through (iii) of this definition, may elect to use the emissions unit's potential to emit, in TPY. "Reactivation of a very clean coal-fired electric utility steam generating unit" means any physical change or change in the method of operation associated with the commencement of commercial operations by a coal-fired utility unit after a period of discontinued operation where the unit: (A) has not been in operation for the two-year period prior to the enactment of the Clean Air Act Amendments of 1990, and the emissions from such unit continue to be carried in the Department's emissions inventory at the time of enactment; (B) was equipped prior to shutdown with a continuous system of emissions control that achieves a removal efficiency for sulfur dioxide of no less than 85% and a removal efficiency for particulates of no less than 98%; (C) is equipped with low-NOX burners prior to the time of commencement of operations following reactivation; and 2024_Oct_AQAC_SC_5_7_8_RUL_Presented 41 October 15, 2024 (D) is otherwise in compliance with the requirements of the Act. "Regulated NSR pollutant" means the following: (A) any pollutant for which a NAAQS has been promulgated. This includes but is not limited to the following: (i) PM2.5 emissions and PM10 emissions shall include gaseous emissions from a source or activity which condense to form particulate matter at ambient temperatures. Such condensable particulate matter shall be accounted for in applicability determinations and in establishing emissions limitations for PM2.5 and PM10 in PSD permits. (ii) any pollutant identified as a constituent or precursor to any pollutant identified under subparagraph (A) of this definition. Precursors identified by the EPA Administrator for purposes of NSR are the following: (I) volatile organic compounds and nitrogen oxides are precursors to ozone in all attainment and unclassifiable areas. (II) sulfur dioxide is a precursor to PM2.5 in all attainment and unclassifiable areas. (III) nitrogen oxides are presumed to be precursors to PM2.5 in all attainment and unclassifiable areas, unless the State demonstrates to the EPA Administrator's satisfaction or EPA demonstrates that emissions of nitrogen oxides from sources in a specific area are not a significant contributor to that area's ambient PM2.5 concentrations. (IV) volatile organic compounds are presumed not to be precursors to PM2.5 in any attainment or unclassifiable area, unless the State demonstrates to the EPA Administrator's satisfaction or EPA demonstrates that emissions of volatile organic compounds from sources in a specific area are a significant contributor to that area's ambient PM2.5 concentrations. (B) any pollutant that is subject to any standard promulgated under section 111 of the Act; (C) any Class I or II substance subject to a standard promulgated under or established by title VI of the Act; or (D) any pollutant that otherwise is "subject to regulation" under the Act as defined in the definition of "subject to regulation" in OAC 252:100-8-31; (E) Notwithstanding subparagraphs (B) through (D) of this definition, regulated NSR pollutant does not include: (i) any or all HAP either listed in section 112 of the Act or added to the list pursuant to section 112(b)(2) of the Act, which have not been delisted pursuant to section 112(b)(3) of the Act, unless the listed HAP is also regulated as a constituent or precursor of a general pollutant listed under section 108 of the Act; or (ii) any pollutant that is regulated under section 112(r) of the Act, provided that such pollutant is not otherwise regulated under the Act. "Replacement unit" means an emissions unit for which all the criteria listed in paragraphs (A) through (D) of this definition are met. No creditable emission reduction shall be generated from shutting down the existing emissions unit that is replaced. (A) The emissions unit is a reconstructed unit within the meaning of 40 CFR 60.15(b)(1), or the emissions unit completely takes the place of an existing emissions unit. (B) The emissions unit is identical to or functionally equivalent to the replaced emissions unit. 2024_Oct_AQAC_SC_5_7_8_RUL_Presented 42 October 15, 2024 (C) The replacement unit does not alter the basic design parameter(s) of the process unit. (D) The replaced emissions unit is permanently removed from the major stationary source, otherwise permanently disabled, or permanently barred from operating by a permit that is enforceable as a practical matter. If the replaced emissions unit is brought back into operation, it shall constitute a new emissions unit. "Repowering" means (A) Repowering shall mean the replacement of an existing coal-fired boiler with one of the following clean coal technologies: atmospheric or pressurized fluidized bed combustion, integrated gasification combined cycle, magnetohydrodynamics, direct and indirect coal-fired turbines, integrated gasification fuel cells, or as determined by the Administrator, in consultation with the Secretary of Energy, a derivative of one or more of these technologies, and any other technology capable of controlling multiple combustion emissions simultaneously with improved boiler or generation efficiency and with significantly greater waste reduction relative to the performance of technology in widespread commercial use as of November 15, 1990. (B) Repowering shall also include any oil and/or gas-fired unit which has been awarded clean coal technology demonstration funding as of January 1, 1991, by the Department of Energy. (C) The Director shall give expedited consideration to permit applications for any source that satisfies the requirements of this definition and is granted an extension under section 409 of the Act. "Significant" means: (A) In reference to a net emissions increase or the potential of a source to emit any of the following pollutants, a rate of emissions that would equal or exceed any of the following significant emission rates: (i) carbon monoxide: 100TPY, (ii) nitrogen oxides: 40 TPY, (iii) sulfur dioxide: 40 TPY, (iv) particulate matter: 25 TPY of particulate matter emissions or 15 TPY of PM10 emissions, (v) PM2.5: 10 TPY of direct PM2.5 emissions; 40 TPY of sulfur dioxide emissions; or 40 TPY of nitrogen oxide emissions unless demonstrated not to be a PM2.5 precursor under the definition of "regulated NSR pollutant", (vi) ozone: 40 TPY of VOC or NOX, (vii) lead: 0.6 TPY, (viii) fluorides: 3 TPY, (ix) sulfuric acid mist: 7 TPY, (x) hydrogen sulfide (H2S): 10 TPY, (xi) total reduced sulfur (including H2S): 10 TPY, (xii) reduced sulfur compounds (including H2S): 10 TPY, (xiii) municipal waste combustor organics (measured as total tetra-through octa- chlorinated dibenzo-p-dioxins and dibenzofurans): 3.5 x 10-6 TPY, (xiv) municipal waste combustor metals (measured as particulate matter): 15 TPY, (xv) municipal waste combustor acid gases (measured as sulfur dioxide and hydrogen chloride): 40 TPY, 2024_Oct_AQAC_SC_5_7_8_RUL_Presented 43 October 15, 2024 (xvi) municipal solid waste landfill emissions (measured as nonmethane organic compounds): 50 TPY. (B) In reference to a net emissions increase or the potential of a source to emit a regulated NSR pollutant that subparagraph (A) of this definition does not list, any emission rate. (C) Any emissions rate or any net emissions increase associated with a major stationary source or major modification which would construct within 6 miles of a Class I area, and have an impact on such area equal to or greater than 1 μg/m3 (24-hour average). "Significant emissions increase" means, for a regulated NSR pollutant, an increase in emissions that is significant for that pollutant. "Significant net emissions increase" means a significant emissions increase and a net increase. "Stationary source" means any building, structure, facility or installation which emits or may emit a regulated NSR pollutant. "Subject to regulation" means, for any air pollutant, that the pollutant is subject to either a provision in the federal Clean Air Act, or a nationally-applicable regulation codified by the EPA Administrator in subchapter C of Chapter I of 40 CFR, that requires actual control of the quantity of emissions of that pollutant, and that such a control requirement has taken effect and is operative to control, limit, or restrict the quantity of emissions of that pollutant released from the regulated activity. Except that: (A) Greenhouse gases (GHG), either as individual pollutants or as an aggregate, shall not be subject to regulation except as provided in subparagraph (D) of this definition. (B) For purposes of subparagraphs (C) and (D) of this definition, the term TPY CO2 equivalent emissions (CO2e) shall represent an amount of GHG emitted, and shall be computed as follows: (i) Multiplying the mass amount of emissions (in TPY), for each of the six greenhouse gases in the pollutant GHG, by the gas' associated global warming potential (GWP) published in Table A-1 to subpart A of 40 CFR Part 98 - Global Warming Potentials (ii) Summing the resultant value from (B)(i) of this definition for each gas to compute a TPY CO2e. (C) The term emissions increase as used in subparagraph (D) of this definition shall mean that both a significant emissions increase (as calculated using the procedures in OAC 252:100-8-30(b)(1) through (5)) and a significant net emissions increase (as defined in the definitions of "net emissions increase" and "significant" in 252:100-8-31) occur. For the pollutant GHG, an emissions increase shall be based on TPY CO2e, and shall be calculated assuming the pollutant GHG is a regulated NSR pollutant, and "significant" is defined as 75,000 TPY CO2e and the emissions are otherwise subject to regulation as previously described in this definition. (D) Beginning January 2, 2011, the pollutant GHG is subject to regulation if it meets the other requirements of this definition and if: (i) The stationary source is a new major stationary source for a regulated NSR pollutant that is not GHG, and also will emit or will have the potential to emit 75,000 TPY CO2e or more; or (ii) The stationary source is an existing major stationary source for a regulated NSR pollutant that is not GHG, and also will have an both a significant emissions increase and a significant net emission increase of a regulated NSR pollutant (that is not GHG), and an emissions increase of 75,000 TPY CO2e or more. 2024_Oct_AQAC_SC_5_7_8_RUL_Presented 44 October 15, 2024 (E) If federal legislation or a federal court stays, invalidates, delays the effective date, or otherwise renders unenforceable by the EPA, in whole or in part, the EPA's tailoring rule (75 FR 31514, June 3, 2010), endangerment finding (74 FR 66496, December 15, 2009), or light-duty vehicle greenhouse gas emission standard (75 FR 25686, May 7, 2010), this definition shall be enforceable only to the extent that it is enforceable by the EPA. "Temporary clean coal technology demonstration project" means a clean coal technology demonstration project that is operated for a period of 5 years or less, and which complies with the Oklahoma Air Pollution Control Rules in OAC 252:100 and other requirements necessary to attain and/or maintain the NAAQS during and after the project is terminated.