(19)Major source is any stationary source (or any group of stationary sources that are located on one or more contiguous or adjacent properties, and are under common control of the same person (or persons under common control) belonging to a single major industrial grouping and that is described in paragraph (a), (b), or (c) of this definition. For the purposes of defining "major source", a stationary source or group of stationary sources shall be considered part of a single industrial grouping if all of the pollutant emitting activities at such source or group of sources on contiguous or adjacent properties belong to the same Major Group (i.e., all have the same two-digit code) as described in the Standard Industrial Classification Manual, 1987.
For onshore activities belonging to Standard Industrial Classification (SIC) Major Group 13: Oil and Gas Extraction, pollutant emitting activities shall be considered adjacent if they are located on the same surface site; or if they are located on surface sites that are located within /4-mile of one another (measured from the center of the equipment on the surface site) and they share equipment. Shared equipment includes, but is not limited to, produced fluids storage tanks, phase separators, natural gas dehydrators or emissions control devices. Surface site, as used herein, has the same meaning as in 40 CFR 63.761.
(a) A major source under Section 112 of the Federal Act is defined as follows: (1) For pollutants other than radionuclides, any stationary source or group of stationary sources located within a contiguous area and under common control that emits or has the potential to emit, in the aggregate, 10 tons per year (tpy) or more of any hazardous air pollutant which has been listed pursuant to Section 112(b) of the Federal Act, 25 tpy or more of any combination of such hazardous air pollutants, or such lesser quantity as the Administrator may establish by rule. Notwithstanding the preceding sentence, emissions from any oil or gas exploration or production well (with its associated equipment) and emissions from any pipeline compressor or pump station shall not be aggregated with emissions from other similar units, whether or not such units are in a contiguous area or under common control, to determine whether such units or stations are major sources; or(2) For radionuclides, "major source" shall have the meaning specified by the Administrator by rule.(b) A major stationary source of air pollutants, as defined in Section 302 of the Federal Act, that directly emits or has the potential to emit, 100 tpy or more of any air pollutant subject to regulation except the pollutant greenhouse gases as defined in this section. This definition of major stationary source includes any major source of fugitive emissions of any such pollutant (except the pollutant greenhouse gases as defined in this section), as determined by rule by the Administrator. The fugitive emissions of a stationary source shall not be considered in determining whether it is a major stationary source for the purposes of Section 302(j) of the Federal Act, unless the source belongs to one of the following categories of stationary sources: (1) coal cleaning plants (with thermal dryers);(3) portland cement plants;(4) primary zinc smelters;(5) iron and steel mills;(6) primary aluminum ore reduction plants;(7) primary copper smelters;(8) municipal incinerators capable of charging more than 250 tons of refuse per day;(9) hydrofluoric, sulfuric, or nitric acid plants;(10) petroleum refineries;(12) phosphate rock processing plants;(13) coke oven batteries;(14) sulfur recovery plants;(15) carbon black plants (furnace process);(16) primary lead smelters;(17) fuel conversion plants;(19) secondary metal production plants;(20) chemical process plants (The term chemical processing plant shall not include ethanol production facilities that produce ethanol by natural fermentation included in NAICS codes 325193 or 312140.);(21) fossil-fuel boilers (or combination thereof) totaling more than 250 million British thermal units per hour heat input;(22) petroleum storage and transfer units with a total storage capacity exceeding 300,000 barrels;(23) taconite ore processing plants;(24) glass fiber processing plants;(25) charcoal production plant;(26) fossil-fuel-fired steam electric plants of more than 250 million British thermal units per hour heat input; or(27) any other stationary source category, which as of August 7, 1980, is being regulated by a standard promulgated under Section 111 or 112 of the Federal Act.(c) A major stationary source as defined in part D of Title I of the Federal Act, including the following: (1) for ozone nonattainment areas, sources with the potential to emit 100 tpy or more of volatile organic compounds or oxides of nitrogen in areas classified as "marginal' or "moderate", 50 tpy or more in areas classified as "serious", 25 tpy or more in areas classified as "severe", and 10 tpy or more in areas classified as "extreme"; except that the references in this paragraph to 100, 50, 25 and 10 tpy of nitrogen oxides shall not apply with respect to any source for which the Administrator has made a finding under Section 182(f)(1) or (2) of the Federal Act, that requirements under Section 182(f) of the Federal Act do not apply;(2) for ozone transport regions established pursuant to Section 184 of the Federal Act, sources with the potential to emit 50 tpy or more of volatile organic compounds;(3) for carbon monoxide nonattainment areas: (a) that are classified as "serious", and(b) in which stationary sources contribute significantly to carbon monoxide levels as determined under rules issued by the Administrator, sources with the potential to emit 50 tpy or more of carbon monoxide; and(4) for particulate matter (PM10) nonattainment areas classified as "serious", sources with the potential to emit 70 tpy or more of PM10.