Okla. Admin. Code § 252:100-8-51
The definitions in 40 CFR 51.165(a)(1) are hereby incorporated by reference as they exist on July 1, 2010, except for the definitions found at 40 CFR 51.165(a)(1)(xxxv) "baseline actual emissions"; (ii) "building, structure, facility, or installation"; (xlv) "fixed capital cost"; (xliv) "functionally equivalent component"; (v) "major modification"; (vi) "net emissions increase"; (xliii) "process unit"; (xxxvii) "regulated NSR pollutant"; (xxxviii) "reviewing authority"; (viii) "secondary emissions"; (xlvi) "total capital investment"; and (xix) "volatile organic compound (VOC)". With the exception of "reviewing authority", "fixed capital cost", "functionally equivalent component", "process unit", and "total capital investment", these terms are defined in OAC 252:100-8-31, 252:100-8-51, or 252:100-1-3. The following words and terms, when used in this Part, shall have the following meaning, unless the context clearly indicates otherwise.
"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 unit or net emissions increase at a major stationary source that is significant for VOC and/or oxides of nitrogen (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 source which the source was capable of accommodating before December 21, 1976, unless such change would be prohibited under any federally enforceable permit condition which was established after December 21, 1976, or the source is approved to use under any permit issued under 40 CFR 52.21 or OAC 252:100-7 or 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 December 21, 1976;
(VII) any change in source ownership;
(VIII) the installation, operation, cessation, or removal of a temporary clean coal technology demonstration project, provided that 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.
(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 252:100-8-56 for a PAL for that pollutant. Instead the definition at 40 CFR 51.165(f)(2)(viii) shall apply.
(C) For the purpose of applying the requirements of OAC 252:100-8-54.1(a) to modifications at major stationary sources of NOX located in ozone nonattainment areas or in ozone transport regions (as defined in 42 U.S.C. § 7511c) , whether or not subject to subpart 2, part D, title I of the Act, any significant net emissions increase of NOX is considered significant for ozone.
(D) Any physical change in, or change in the method of operation of, a major stationary source of VOCs that results in any increase in emissions of VOCs from any discrete operation, emissions unit, or other pollutant emitting activity at the source shall be considered a significant net emissions increase and a major modification for ozone, if the major stationary source is located in an extreme ozone nonattainment area that is subject to subpart 2, part D, title I of the Act.
"Net emissions increase" means:
(A) With respect to any regulated NSR pollutant emitted by a major stationary source, net emissions increase shall mean 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 252:100-8-50(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 under OAC 252:100-8, Part 9, which permit is in effect when the increase in actual emissions from the particular change occurs.
(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 as a practical matter at and after the time that actual construction on the particular change begins;
(iii) the Director has not relied on it in issuing any permit under OAC 252:100; and,
(iv) it has approximately the same qualitative significance for public health and welfare as that attributed to the increase from the particular change.
(F) An increase that results from a physical change at a source occurs when the emission unit on which construction occurred becomes operational and begins to emit a particular pollutant. Any replacement unit that requires shakedown becomes operational after a reasonable shakedown period, not to exceed 180 days.
(G) Paragraph 40 CFR 51.165(a)(1)(xii)(B) of the definition of "actual emissions" shall not apply for determining creditable increases and decreases or after a change.
"Regulated NSR pollutant" for purposes of this Part, means any or all of the following:
(A) Nitrogen oxides or volatile organic compounds;
(B) Any pollutant for which a NAAQS has been promulgated;
(C) Any pollutant that is identified under this paragraph as a constituent or precursor of a general pollutant listed under paragraph (A) or (B) of this definition, provided that such constituent or precursor pollutant may only be regulated under NSR as part of regulation of the general pollutant. Precursors identified by the Administrator for purposes of NSR are the following:
(i) Volatile organic compounds and nitrogen oxides are precursors to ozone in all ozone nonattainment areas.
(ii) Sulfur dioxide is a precursor to PM2.5 in all PM2.5 nonattainment areas.
(iii) Nitrogen oxides are presumed to be precursors to PM2.5 in all PM2.5 nonattainment areas, unless the State demonstrates to the 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 and ammonia are presumed not to be precursors to PM2.5 in any PM2.5 nonattainment area, unless the State demonstrates to the Administrator's satisfaction or EPA demonstrates that emissions of volatile organic compounds or ammonia from sources in a specific area are a significant contributor to that area's ambient PM2.5 concentrations, or
(D) PM2.5 emissions and PM10 emissions, including 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 nonattainment major NSR permits.
Okla. Admin. Code § 252:100-8-51