NR 407.02(4)(b)20.20. Chemical process plants. The chemical processing plants category does not include ethanol production facilities that produce ethanol by natural fermentation, as described by the 6-digit code of 312140 or 325193 in the North American Industry Classification System United States, 2007, incorporated by reference in s. NR 484.05 (17). NR 407.02(4)(b)21.21. Fossil-fuel boilers, or combination thereof, totaling more than 250 million British thermal units per hour heat input. NR 407.02(4)(b)22.22. Petroleum storage and transfer units with a total storage capacity exceeding 300,000 barrels. NR 407.02(4)(b)26.26. Fossil-fuel-fired steam electric plants of more than 250 million British thermal units per hour heat input. NR 407.02(4)(b)27.27. Any other stationary source category not included in this paragraph which as of August 7, 1980 is being regulated under section 111 or 112 of the Act (42 USC 7411 or 7412). NR 407.02(4)(c)1.a.a. Sources with the potential to emit 100 tpy or more of volatile organic compounds or oxides of nitrogen in areas classified as “rural transport,” “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 do not apply with respect to any source for which the administrator has made a finding, under section 182 (f) (1) or (2) of the Act (42 USC 7511a (f) (1) or (2)), that requirements under section 182 (f) of the Act (42 USC 7511a (f)) do not apply. NR 407.02(4)(c)1.b.b. The classification with the lowest emission threshold under subd. 1. a. determines the major source threshold in an area classified as nonattainment for more than one ozone national ambient air quality standard, until the area is redesignated to attainment for a current standard or a redesignation substitute for a revoked standard has been approved by the EPA for the standard with the lowest emission threshold. NR 407.02 NoteNote: The department maintains materials accessible to the public that show current Wisconsin nonattainment areas and summarizes the applicable permitting requirements for major sources of emissions within these areas.
NR 407.02(4)(c)2.2. For ozone transport regions established pursuant to section 184 of the Act (42 USC 7511c), sources with the potential to emit 50 tpy or more of volatile organic compounds. NR 407.02(4)(c)3.3. For carbon monoxide nonattainment areas that are classified as “serious”, and 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. NR 407.02(4)(c)4.4. For particulate matter (PM10) nonattainment areas classified as “serious”, sources with the potential to emit 70 tpy or more of PM10. NR 407.02(4m)(4m) “Natural minor source” means a source that meets all of the following criteria: NR 407.02(4m)(b)(b) Is not a synthetic minor source under this chapter and does not have a permit containing conditions that allow the source to avoid being either a major stationary source under the definition in s. NR 405.02 (22) or a major source under the definition in s. NR 408.02 (21). NR 407.02(5)(5) “Non-part 70 source” means any stationary source required to obtain an operation permit that is not a part 70 source. NR 407.02(6)(a)(a) “Part 70 source” means any of the following stationary sources, except as provided in par. (b): NR 407.02(6)(a)3.3. Any source subject to a standard or other requirement under section 112 of the Act (42 USC 7412), except for a source subject solely to regulations or requirements under section 112(d)(5) or (r) of the Act (42 USC 7412 (d)(5)or (r)). NR 407.02(6)(b)(b) Notwithstanding par. (a), all sources listed in par. (a) 2. or 3. are not part 70 sources unless they are one of the following: