NR 406.04(4)(i)1. 1. The external combustion furnace has a maximum heat input capacity of no greater than 10 mmBtu/hour if the ability to combust distillate oil is being added and 25 mmBtu/hour if the ability to combust natural gas or propane is being added.

NR 406.04(4)(i)2. 2. The use of the new fuel does not cause or exacerbate the exceedance of any ambient air quality standard or increment in ch. NR 404.

NR 406.04(4)(i)3. 3. The change does not trigger a requirement under section 111 or 112 of the Act (42 USC 7411 or 7412), excluding section 112 (d) (5) or (r) (42 USC 7412 (d) (5) or (r)).

NR 406.04(4)(j) (j) Other changes. A change where all of the following conditions are met:

NR 406.04(4)(j)1. 1. The change is not prohibited by any permit, plan approval or special order applicable to the source.

NR 406.04(4)(j)2. 2. The change is exempt under sub. (1), or the increased emissions due to the change do not exceed the maximum theoretical emission levels specified in sub. (2) (b), (c), (cm), (cs), (d) and (f).

NR 406.04(4)(j)3. 3. The change does not trigger a requirement under section 111 or 112 of the Act (42 USC 7411 or 7412), excluding section 112 (d) (5) or (r) (42 USC 7412 (d) (5) or (r)).

NR 406.04(5) (5) Exempt relocations.

NR 406.04(5)(a) (a) In addition to the approved relocated sources which are exempt from the need for an additional permit under s. 285.60 (5), Stats., and the relocation of an emissions unit within the contiguous property of an attainment area major source, no construction permit is required for the relocation of an emissions unit within the contiguous property of a minor source or a nonattainment area major source if all of the following conditions are met:

NR 406.04(5)(a)1. 1. The relocation of the emissions unit is not prohibited by any permit, plan approval or special order applicable to the source.

NR 406.04(5)(a)2. 2. The emissions unit will not be modified.

NR 406.04(5)(a)3. 3. The emissions unit meets all applicable emission limitations.

NR 406.04(5)(a)4. 4. The emissions unit’s stack height or stack gas exit velocity or temperature will not be decreased.

NR 406.04(5)(b) (b) If the criteria in par. (a) 1., 2. and 3. are met but the emissions unit’s stack height or stack gas exit velocity or temperature will be decreased, no construction permit is required for the relocation of the emissions unit if the allowable emissions from the source will not cause or exacerbate the violation of an ambient air quality standard or ambient air increment.

NR 406.04(6) (6) Exempt replacements. No construction permit is required for the replacement of a source if all of the following conditions are met:

NR 406.04(6)(a) (a) The replacement is for only a portion of a basic emissions unit.

NR 406.04(6)(b) (b) Such replacement is not prohibited by any permit, plan approval or special order applicable to the source.

NR 406.04(6)(c) (c) The essential components of the basic emissions unit are not replaced through several partial replacements within a 12-month period.

NR 406.04(7) (7) Conditions for specific exemptions. To be eligible for a specific exemption under sub. (1) (a) 5., (ce), (cm), (d), (e), (g), (gm), (h), (j), (m), (o), (w), (y) or (z), the owner or operator of a direct stationary source shall keep and maintain records, for a minimum of 5 years, of materials used, emissions, or production rates, that are adequate to demonstrate that the source qualifies for the exemption. Any direct stationary source that ever exceeds any level listed in sub. (1) (a) 5., (ce), (cm), (d), (e), (g), (gm), (h), (j), (m), (o), (w), (y) or (z) is not thereafter eligible for the exemption under that subsection.

NR 406.04 History History: Cr. Register, March, 1972, No. 195, eff. 4-1-72; r. and recr. Register, June, 1975, No. 234, eff. 7-1-75; am. 1), renum. 2) and (3) to be (3) and (4) and am., cr. (2), Register, April, 1977, No. 256, eff. 5-1-77; r. and recr. Register, April, 1983, No. 328, eff. 5-1-83; reprinted to correct error in (2) (a) 8., Register, July, 1983, No. 331; renum. from NR 154.04 (2) to (6), Register, September, 1986, No. 369, eff. 10-1-86; am. (1) (intro.), (e) and (f), (2) (intro.) and (g), (4) (a) (intro.), r. (1) (m) to (o), renum. (3) (intro.), (a) to (c), (7) (a) to (c) to be (4) (intro.), (e) 1. to 3., NR 406.07 (1) and (2) and NR 406.04 (7) and am. (4) (intro.), (e) 3., NR 406.07 and NR 406.04 (7), cr. (4) (e) (intro.), Register, April, 1988, No. 388, eff. 5-1-88; r. (2) (e) and (4) (d), renum. (2) (d), (f), (g) and (4) (e) to be (2) (e), (g), (h) and (4) (d) and am. (2) (g), cr. (2) (d), (f), (3) and (4) (a) 4., am. (4) (a) 2. and 3., Register, September, 1988, No. 393, eff. 10-1-88; cr. (2) (cm), Register, December, 1988, No. 396, eff. 1-1-89; cr. (1) (m), am. (1) (a) 1. to 3., (g), (h), and (j), (2) (b), (c), (cm), (d), (e) 1. and 5., (f) 1. to 3. and (g), (7) (a), (b) and (c) 1. and 5., Register, August, 1991, No. 428, eff. 9-1-91; cr. (1) (n), Register, October, 1991, No. 430, eff. 11-1-91; correction in (1) (a) and (b), (4) (d) 2. made under s. 13.93 (2m) (b) 7., Stats., Register, October, 1991, No. 430; correction in (1) (a) and (n) made under s. 13.93 (2m) (b) 1. and 7., Stats., Register, May, 1992, No. 437; emerg. am. (1) (intro.), (a) (intro.) and 5., (b), (c), (e), (g), (h), (j) and (l), (2), (4) (intro.) to (c), (5) and (6) (intro.), cr. (1) (lm), (4) (e) to (g), r. and recr. (4) (d), r. (7), eff. 11-15-92; am. (1) (intro.), (a) (intro.) and 5., (b), (c), (e), (g), (h), (j) and (l), (2), (4) (intro.) to (c), (5) (a) (intro.), (b) and (6) (intro.), r. (1) (d) and (7), cr. (2) (i), (4) (a) 5. and 6., (e) to (g), r. and recr. (4) (d), Register, May, 1993, No. 449, eff. 6-1-93; corrections made under s. 13.93 (2m) (b) 12., Stats., Register, May, 1993, No. 449; cr. (1) (d), (o) to (w), am. (1) (e) and (f), Register, December, 1993, No. 456, eff. 1-1-94; cr. (1) (x) to (zb), Register, June, 1994, No. 462, eff. 7-1-94; am. (1) (m) (intro.) to 3., r. (1) (m) 5., renum. (1) (m) 6. to 10. to be 5. to 9. and am. 7. and 9., Register, September, 1994, No. 465, eff. 10-1-94; am. (2) (f) 3., (3) (a), cr. (2) (f) 3m., Register, December, 1994, No. 468, eff. 1-1-95; am. (1) (n) 2. c., Register, February, 1995, No. 470, eff. 3-1-95; am. (1) (a) 5., re. and recr. (1) (r), Register, June, 1995, No. 474, eff. 7-1-95; am. (1) (m) (intro.), Register, August, 1995, No. 476, eff. 9-1-95; am. (1) (intro.), (g), (h), (j), (2) (intro.), (c), (f) 3m., (h), (i) and (4) (a) 6., cr. (7), Register, December, 1995, No. 480, eff. 1-1-96; am. (1) (g), (i) 1. (intro.) (m) 9., (n) (intro.), 2., (2) (i), (3) (c), (4) (a) 4., 5., 6., (5) (a) (intro.), (6) (intro.), Register, December, 1996, No. 492, eff. 1-1-97; am. (1) (o) and (p) and cr. (1) (om) and (pm), Register, March, 1997, No. 495, eff. 4-1-97; cr. (1) (rm), Register, September, 1997, No. 501, eff. 10-1-97; am. (1) (c) and (7), cr. (1) (ce), (cm), (i) 1. c., (zc) and (zg); r. (2) (g), Register, December, 1997, No. 504, eff. 1-1-98; cr. (intro.) and (4) (h); am. (1) (intro.), (a) (intro.), 2., 5., (g), (h) and (j); renum. (1) (i) 1. (intro.) and a. to c. to be (1) (i) (intro.) and 1. to 3.; renum. and am. (1) (i) 2. to be (1) (i) 4. and (2) (i) to be (2) (h); r. (2) (e) and (h) and r. and recr. (4) (intro.), Register, October, 1999, No. 526, eff. 11-1-99; cr. (1) (gm), am. (7), Register, January, 2001, No. 541, eff. 2-1-01; correction in (7) made under s. 13.93 (2m) (b) 7., Stats., Register June 2004 No. 582; CR 02-097: am. (2) (f) 1., (3) (a) and (c), cr. (3) (e), r. and recr. (2) (f) 2. and 3., r. (2) (f) 3m. and (4) (a) 4., renum. (4) (a) 5. and 6. to be 4. and 5. and am. 4., Register June 2004 No. 582, eff. 7-1-04; CR 01-081: am (intro.) Register September 2004 No. 585, eff. 10-1-04; CR 04-107: r. (1) (c), am. (1) (ce), (cm) and (m) (intro.), cr. (2m) Register August 2005 No. 596, eff. 9-1-05; CR 06-047: cr. (1) (zh), (1q), (4) (h) and (i), renum. (4) (h) to be (4) (j), Register May 2007 No. 617, eff. 6-1-07; corrections in (1) (a) and (b) made under s. 13.93 (2m) (b) 7., Stats., Register May 2007 No. 617; CR 06-019: cr. (1f) and (1k) Register June 2007 No. 618, eff. 7-1-07; CR 07-040: am. (2m) (b), cr. (2m) (b) (note) Register April 2008 No. 628, eff. 5-1-08; CR 07-076: am. (3) (e) Register July 2008 No. 631, eff. 8-1-08; CR 07-036: am. (intro.) Register November 2008 No. 635, eff. 12-1-08; CR 04-023: cr. (1) (zi) Register December 2008 No. 636, eff. 1-1-09; CR 09-020: am. (1f) (b), (1k) (b), (1q) (intro.), (g), (2) (h), (4) (a) 5., (h) 2., (i) 3., (j) 3. Register January 2010 No. 649, eff. 2-1-10; CR 10-050: am (1) (n) (intro.), 1., 2. (intro.), cr. (2) (cs) Register November 2010 No. 659, eff. 12-1-10; 2011 Wis. Act 122: r. in part (3) (e) eff. 3-22-12; CR 15-005: renum. (1) (w) to (1) (w) (intro.) and am., cr. (1) (w) 1., 2. Register November 2015 No. 719, eff. 12-1-15; CR 19-015: cr. (1) (a) 4m., (bm), am. (1) (i) (intro.), 2., 3., renum. (1) (i) 4. to (1) (i) 4. (intro.), a., b., c., and am. (intro.), am. (1) (m) (intro.), (zg) 1., r. (1f) (c), cr. (1f) (f), am. (1k) (intro.), (1q) (f), (g), (2) (h), (4) (a) 5., (b), cr. (4) (e) 3., am. (4) (h) 2., (j) 2., (7) Register September 2020 No. 777, eff. 10-1-20.

NR 406.07 NR 406.07 Scope of permit exemption.

NR 406.07(1) (1) Exemption or the granting of an exemption under this chapter from the requirement to obtain a permit does not relieve any person from compliance with the emission limitations of chs. NR 400 to 499, the air quality requirements of ch. NR 404, the reporting requirements of ch. NR 438, or with any other provision of law.

NR 406.07(2) (2) If a source undergoes a modification which is exempt from the requirement to obtain a construction permit under s. NR 406.04 (4), it will not be treated as a modified source for purposes of the emission limitations under chs. NR 400 to 499.

NR 406.07(3) (3) A source that undergoes a modification which is exempt from the requirement to obtain a construction permit under s. NR 406.04 (1f) or (1k) shall be treated as a new or modified source for the purposes of the emission limitations under chs. NR 400 to 499 unless the modification is excluded from being considered a modification under s. NR 406.04 (4).

NR 406.07 History History: Renum. from NR 406.04 (7) (a) and (b), Register, April, 1988, No. 388, eff. 5-1-88; am. (2), Register, September, 1988, No. 393, eff. 10-1-88; emerg. am. (2), eff. 11-15-92; am., Register, May, 1993, No. 449, eff. 6-1-93; CR 06-019: cr. (3) Register June 2007 No. 618, eff. 7-1-07.

NR 406.075 NR 406.075 Federally enforceable requirements.

NR 406.075(1) (1) Except as provided in sub. (2), all terms and conditions in a construction permit, including any provisions designed to limit a stationary source’s potential to emit, are federally enforceable by the administrator under section 113 of the Act (42 USC 7413).

NR 406.075(2) (2) Notwithstanding sub. (1), the department shall specifically designate as not federally enforceable any terms and conditions included in the permit that are not required under the Act, under any of the federal regulations implementing the Act or under the state implementation plan.

NR 406.075 History History: CR 04-106: cr. Register November 2005 No. 599, eff. 12-1-05.