NR 405.07(4)(a)23. 23. Taconite ore processing plants.

NR 405.07(4)(a)24. 24. Glass fiber processing plants.

NR 405.07(4)(a)25. 25. Charcoal production plants.

NR 405.07(4)(a)26. 26. Fossil fuel fired steam electric plants of more than 250 million British thermal units per hour heat input.

NR 405.07(4)(a)27. 27. Any other stationary source category which, as of August 7, 1980, is being regulated under section 111 or 112 of the Act (42 USC 7411 or 7412).

NR 405.07(4)(b) (b) The major source or major modification is a portable stationary source which has previously received a permit under requirements in ss. NR 405.08 to 405.16 and all of the following conditions are met:

NR 405.07(4)(b)1. 1. The source proposes to relocate and emissions of the source at the new location would be temporary.

NR 405.07(4)(b)2. 2. The emissions from the source would not exceed its allowable emissions.

NR 405.07(4)(b)3. 3. The emissions from the source would impact no Class I area and no area where an applicable increment is known to be violated.

NR 405.07(4)(b)4. 4. Reasonable notice is given to the department prior to the relocation identifying the proposed new location and the probable duration of operation at the new location. Such notice shall be given to the department not less than 30 days in advance of the proposed relocation unless a different time duration is previously approved by the department.

NR 405.07(5) (5) The requirements of ss. NR 405.08 to 405.16 do not apply to a major stationary source or major modification with respect to a particular air contaminant if the owner or operator demonstrates that, as to that air contaminant, the source or modification is located in an area designed as nonattainment under section 107 of the Act (42 USC 7407).

NR 405.07(6) (6) The requirements contained in ss. NR 405.09, 405.11, and 405.13 do not apply to a proposed major stationary source or major modification with respect to a particular air contaminant, if the allowable emissions of that air contaminant from a new source, or the net emissions increase of that air contaminant from a modification, would be temporary and impact no Class I area and no area where an applicable increment is known to be violated.

NR 405.07(7) (7) The requirements contained in ss. NR 405.09, 405.11, and 405.13 as they relate to any maximum allowable increase for a Class II area do not apply to a modification of a major stationary source that was in existence on March 1, 1978, if the net increase in allowable emissions of each air contaminant from the modification after the application of best available control technology would be less than 50 tons per year.

NR 405.07(8) (8) The department may exempt a proposed major stationary source or major modification from the requirements of s. NR 405.11 with respect to monitoring for a particular air contaminant if one of the following applies:

NR 405.07(8)(a) (a) The emissions increase of the air contaminant from a new stationary source or the net emissions increase of the air contaminant from a major modification would cause, in any area, air quality impacts less than the following amounts:

NR 405.07(8)(a)1. 1. Carbon monoxide — 575 µg/m3, 8-hour average.

NR 405.07(8)(a)2. 2. Nitrogen dioxide — 14 µg/m3, annual average.

NR 405.07(8)(a)3. 3. PM10 — 10 µg/m3, 24-hour average.

NR 405.07(8)(a)3m. 3m. PM2.5 – 0 mg/m3.

NR 405.07 Note Note: In accordance with Sierra Club v. EPA, 706 F.3d 428 (D.C. Cir. 2013), no exemption is available with regard to PM2.5.

NR 405.07(8)(a)4. 4. Sulfur dioxide — 13 µg/m3, 24-hour average.

NR 405.07(8)(a)5. 5. Ozone.

NR 405.07 Note Note: No de minimis air quality level is provided for ozone. However, any source with a net increase of 100 tons per year or more of volatile organic compounds or nitrogen oxides subject to regulation under this chapter would be required to perform an ambient impact analysis, including the gathering of ambient air quality data.

NR 405.07(8)(a)6. 6. Lead — 0.10 µg/m3, 3-month average.

NR 405.07(8)(a)7. 7. Mercury — 0.25 µg/m3, 24-hour average.

NR 405.07(8)(a)8. 8. Beryllium — 0.0010 µg/m3, 24-hour average.

NR 405.07(8)(a)9. 9. Fluorides — 0.25 mg/m3, 24-hour average.

NR 405.07(8)(a)10. 10. Vinyl chloride — 15 µg/m3, 24-hour average.

NR 405.07(8)(a)11. 11. Total reduced sulfur — 10 µg/m3, 1-hour average.