# 52.2620 Identification of plan.
(a) *Purpose and scope.* This section sets forth the applicable State Implementation Plan for Wyoming under section 110 of the Clean Air Act, 42 U.S.C. 7410 and 40 CFR part 51 to meet national ambient air quality standards or other requirements under the Clean Air Act.
(b) *Incorporation by reference.* (1) Material listed in paragraphs (c) and (d) of this section with an EPA approval date prior to September 1, 2015, was approved for incorporation by reference by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Material is incorporated as it exists on the date of the approval, and notice of any change in the material will be published in the *Federal Register.* Entries in paragraphs (c) and (d) of this section with EPA approval dates after September 1, 2015, will be incorporated by reference in the next update to the SIP compilation.
(2) EPA Region 8 certifies that the rules/regulations provided by EPA in the SIP compilation at the addresses in paragraph (b)(3) of this section are an exact duplicate of the officially promulgated state rules/regulations which have been approved as part of the SIP as of September 1, 2015.
(3) Copies of the materials incorporated by reference may be inspected at the EPA Region 8 Office, Office of Partnerships and Regulatory Assistance (OPRA), Air Program, 1595 Wynkoop Street, Denver, Colorado 80202-1129 and at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call (202) 741-6030, or go to: *www.archives.gov/federal-register/cfr/ibr-locations.html.*
(c) *EPA-approved regulations.*
| Rule No. | Rule title | Stateeffectivedate | EPAEffectivedate | Final rule citation/date | Comments |
| --- | --- | --- | --- | --- | --- |
| | | | | | |
| Section 02 | Authority | 10/29/1999 | 8/27/2004 | 69 FR 44965, 7/28/04 | |
| Section 03 | Definitions | 2/14/2013 | 12/23/2013 | 78 FR 69998, 11/22/13 | |
| Section 04 | Diluting and concealing emissions | 10/29/1999 | 8/27/2004 | 69 FR 44965, 7/28/04 | |
| Section 05 | Unavoidable equipment malfunction | 1/30/2006 | 6/15/2010 | 75 FR 19886, 4/16/10 | |
| Section 06 | Credible Evidence | 12/8/2000 | 6/15/2010 | 75 FR 19886, 4/16/10 | |
| Section 07 | Greenhouse gasses | 2/14/2013 | 12/23/2013 | 78 FR 69998, 11/22/13 | |
| | | | | | |
| Section 02 | Ambient Standards for Particulate Matter | 4/30/2024 | 9/11/2025 | 90 FR 43915, 9/11/2025 | |
| Section 02 (b), (c), and (d) | Ambient standards for particulate matter | 10/13/2015 | 11/14/2016. | 81 FR 70364, 10/12/2016 | |
| Section 03 | Ambient Standards for Nitrogen Oxides | 4/30/2024 | 9/11/2025 | 90 FR 43915, 9/11/2025 | |
| Section 04 | Ambient Standards for Sulfur Oxides | 4/30/2024 | 9/11/2025 | 90 FR 43915, 9/11/2025 | |
| Section 05 | Ambient Standards for Carbon Monoxide | 4/30/2024 | 9/11/2025 | 90 FR 43915, 9/11/2025 | |
| Section 06 | Ambient Standards for Ozone | 4/30/2024 | 9/11/2025 | 90 FR 43915, 9/11/2025 | |
| Section 08 | Ambient Standards for Suspended Sulfates | 4/30/2024 | 9/11/2025 | 90 FR 43915, 9/11/2025 | |
| Section 10 | Ambient Standards for Lead | 4/30/2024 | 9/11/2025 | 90 FR 43915, 9/11/2025 | |
| Section 12 | Incorporation by Reference | 4/30/2024 | 9/11/2025 | 90 FR 43915, 9/11/2025 | |
| Section 02 | Emission Standards for Particulate Matter | 4/30/2024 | 9/11/2025 | 90 FR 43915, 9/11/2025 | |
| Section 03 | Emission Standards for Nitrogen Oxides | 4/30/2024 | 9/11/2025 | 90 FR 43915, 9/11/2025 | |
| Section 04 | Emission Standards for Sulfur Oxides | 4/30/2024 | 9/11/2025 | 90 FR 43915, 9/11/2025 | |
| Section 05 | Emission Standards for Carbon Monoxide | 4/30/2024 | 9/11/2025 | 90 FR 43915, 9/11/2025 | |
| Section 06 | Emission Standards for Volatile Organic Compounds | 4/30/2024 | 9/11/2025 | 90 FR 43915, 9/11/2025 | |
| Section 09 | Incorporation by Reference | 4/30/2024 | 9/11/2025 | 90 FR 43915, 9/11/2025 | |
| | | | | | |
| Section 02 | Existing Sulfuric Acid Production Units | 4/30/2024 | 9/11/2025 | 90 FR 43915, 9/11/2025 | |
| Section 03 | Existing Nitric Acid Manufacturing Plants | 4/30/2024 | 9/11/2025 | 90 FR 43915, 9/11/2025 | |
| | | | | | |
| Section 02 | Permit requirements for construction, modification, and operation | 10/29/1999 | 8/27/2004 | 69 FR 44965, 7/28/04 | |
| Section 04 | Prevention of significant deterioration | 12/20/2016 | 10/22/2018 | 83 FR 47565, 9/20/18 | |
| Section 13 | Nonattainment new source review permit requirements | 10/13/2015 | 7/5/2016 | 6/2/2016, 81 FR 35273 | |
| Section 14 | Incorporation by reference | 2/5/2018 | 10/22/2018 | 83 FR 47565, 9/20/18 | |
| | | | | | |
| Section 02 | Continuous monitoring requirements for existing sources | 10/29/1999 | 8/27/2004 | 69 FR 44965, 7/28/04 | |
| | | | | | |
| Section 02 | Sweetwater County Particulate Matter Regulations | 4/30/2024 | 9/11/2025 | 90 FR 43915, 9/11/2025 | |
| Section 03 | Conformity of General Federal Actions to State Implementation Plans | 4/30/2024 | 9/11/2025 | 90 FR 43915, 9/11/2025 | |
| Section 05 | Ozone Nonattainment Emission Inventory Rule | 4/30/2024 | 9/11/2025 | 90 FR 43915, 9/11/2025 | |
| Section 10 | Incorporation by Reference | 4/30/2024 | 9/11/2025 | 90 FR 43915, 9/11/2025 | |
| | | | | | |
| Section 02 | Visibility | 10/29/1999 | 8/27/2004 | 69 FR 44965, 7/28/04 | |
| | | | | | |
| Section 02 | Open burning restrictions | 10/29/1999 | 8/27/2004 | 69 FR 44965, 7/28/04 | |
| Section 03 | Wood waste burners | 10/29/1999 | 8/27/2004 | 69 FR 44965, 7/28/04 | |
| Section 04 | Smoke management requirements | 4/5/2005 | 1/11/2013 | 77 FR 73926, 12/12/12 | |
| | | | | | |
| Section 02 | Air pollution emergency episodes | 10/29/1999 | 8/27/2004 | 69 FR 44965, 7/28/04 | |
| | | | | | |
| Section 02 | Motor vehicle pollution control | 10/29/1999 | 8/27/2004 | 69 FR 44965, 7/28/04 | |
| | | | | | |
| Section 2 | Western Backstop Sulfur Dioxide Trading Program | 4/30/2024 | 9/11/2025 | 90 FR 43915, 9/11/2025 | 90 FR 43915, 9/11/2025. |
| Section 3 | Sulfur Dioxide Milestone Inventory | 4/30/2024 | 9/11/2025 | 90 FR 43915, 9/11/2025 | 90 FR 43915, 9/11/2025. |
| App A | Web Chapter 14, Section 2 Monitoring Protocols | 4/30/2024 | 9/11/2025 | 90 FR 43915, 9/11/2025 | 90 FR 43915, 9/11/2025. |
| Chapter I. General Rules of Practice and Procedure. | | | | | |
| Section 16 | Air Quality Division, State Implementation Plan | 4/21/2016 | 5/25/2017 | 82 FR 18994, 4/25/2017 | CAA section 128 Requirements. |
(d) *EPA-approved source specific requirements.*
| Regulation | Rule title | Stateeffectivedate | EPAEffectivedate | Final rule citation/date | Comments |
| --- | --- | --- | --- | --- | --- |
| Black Hills Power and Light | Order containing schedule for compliance, interim requirements, and monitoring and reporting requirements | 4/25/1979 | 8/1/1979 | 44 FR 38473, 7/2/79 | |
| FMC Corporation | Order containing schedule for compliance, interim requirements, and monitoring and reporting requirements | 4/25/1979 | 8/1/1979 | 44 FR 38473, 7/2/79 | |
| Naughton Unit 3 | Air Quality SIP Permits containing BART Alternative requirements, MD-15946 and P0021110 | Nov. 28, 2017 | Apr. 22, 2019. | 84 FR 10435,3/21/19 | Only the following permit provisions: NO and PM emission limits (MD-15946 condition 5, for lb/hr and tons/year emission limits; P0021110, condition 7, for lb/MMbtu emission limits); emission limit compliance dates (P0021110, condition 7; MD-15946, conditions 5 and 6); heat input limit and compliance date (P0021110, condition 18); compliance date for coal pulverizers to be removed from service (P0021110, condition 19); and associated monitoring, recordkeeping, and reporting requirements (P0021110, conditions 4, 6, 8, 9, 10, 11, 12, 13, 14, 17, 18, 19, 21, and 24). |
| Jim Bridger Units 1 and 2 | Air Quality SIP Permit containing associated requirements, P0036941 | 8/29/2023 | 9/8/2025 | 90 FR 38005, 8/7/2025 | Only the following permit provisions: NO emission limits (P0036941, condition 9 for NO lb/MMBtu and tons/year emission limits); emission limit compliance date (P0036941, condition 11 for fuel compliance date); heat input limit and associated compliance date (P0036941, condition 16, 19); and associated monitoring, recordkeeping, and reporting requirements (P0036941, conditions 4, 5, 6, 10.i.1, 10.i.4, 17, 18, 19, 20, and 21). |
| Jim Bridger Units 1-4 | Air Quality SIP Permit containing additional requirements, P0025809 | 5/5/2020 | 9/8/2025 | 90 FR 38005, 8/7/2025 | Only the following permit provisions: NO and SO monthly-block and annual emission limits (P0025809, condition 7 for lb/hr emission limits, and P0025809, condition 9 for tons/year emission limits); emission limit compliance dates (P0025809, conditions 7 and 9); and associated monitoring, recordkeeping, and reporting requirements (P0025809, Condition 8.i). |
(e) *EPA-approved nonregulatory provisions.*
| Rule No. | Rule title | Stateeffectivedate | EPAEffectivedate | Final rule citation/date | Comments |
| --- | --- | --- | --- | --- | --- |
| (01) I | Introduction | 1/22/1972 | 6/30/1972 | 37 FR 10842, 5/31/72 | |
| (02) II | Legal Authority | 2/19/1976 | 9/30/1976 | 41 FR 36652, 8/31/76 | |
| (03) III | Control Strategy | 8/30/1984 | 11/11/1984 | 49 FR 39843, 10/11/84 | |
| (04) IV | Compliance Schedule | 5/29/1973 | 8/2/1973 | 39 FR 24504, 7/03/73 | |
| (05) V | Emergency Episode Plan | 8/26/1981 | 4/12/1981 | 47 FR 5892, 2/09/81 | |
| (06) VI | Air Quality Surveillance | 12/13/1988 | 9/9/1988 | 55 FR 28197, 7/10/88 | |
| (07) VII | Review of New Sources and Modifications | 1/22/1972 | 6/30/1972 | 37 FR 10842, 5/31/72 | |
| (08) VIII | Source Surveillance | 1/22/1972 | 6/30/1972 | 37 FR 10842, 5/31/72 | |
| (09) IX | Resources | 1/22/1972 | 6/30/1972 | 37 FR 10842, 5/31/72 | |
| (10) X | Intergovernmental Cooperation | 1/22/1972 | 6/30/1972 | 37 FR 10842, 5/31/72 | |
| (11) XI | Reports and Revisions | 1/22/1972 | 6/30/1972 | 37 FR 10842, 5/31/72 | |
| (12) XII | Visibility Protection Class I | 9/6/1988 | 3/17/1989 | 54 FR 6912, 2/15/89 | |
| (13) XIII | Sweetwater PM Attainment Plan | 1/25/1979 | 8/1/1979 | 44 FR 38473, 7/02/79 | |
| (14) XIV | Stack Height Good Engineering Practice | 12/9/1988 | 4/16/1989 | 54 FR 11186, 3/17/89 | |
| (15) XV | Small Business Assistance Program | 11/30/1993 | 8/19/1994 | 59 FR 31548, 6/20/94 | |
| (16) XVI | City of Sheridan—PM Air Quality Control and Maintenance Plan | 10/30/1990 | 7/25/1994 | 59 FR 32360, 6/23/94 | |
| (17) XVII | PSD Implementation for NOx | 11/20/1990 | 6/23/1991 | 56 FR 23811, 5/24/91 | |
| (18) XVIII | Interstate Transport, Wyoming Interstate Transport SIP satisfying the requirement of Section 110(a)(2)(D)(i) of the CAA for the 1997 8-hour ozone and PM standards | 4/15/2008 | 7/7/2008 | 73 FR 26019, 5/8/08 | |
| (19) XIX | Powder River Basin PM Memorandum of Agreement | 12/22/1993 | 10/11/1995 | 60 FR 47290, 9/12/95 | |
| (20) XX | Addressing Regional Haze Visibility Protection For The Mandatory Federal Class I Areas Required Under 40 CFR 51.309 | 4/5/2018 | 6/19/2019 | 84 FR 22725, 5/20/2019 | |
| (21) XXI | Infrastructure SIP for Section 110(a)(2)—1997 PM NAAQS | 3/26/2008 | 12/6/2013 | 78 FR 73445, 12/06/13 | |
| (22) XXII | Infrastructure SIP for Section 110(a)(2)—2006 PM NAAQS | 8/19/2011 | 9/9/2015 | 80 FR 47857, 8/10/2015 | |
| (23) XXIII | Infrastructure SIP for Section 110(a)(2)—1997 Ozone NAAQ | 12/10/2009 | 8/24/2011 | 76 FR 44265, 7/25/11 | |
| (24) XXIV | Air Quality Control Regions and Emissions Inventory | 1/22/1972 | 6/30/1972 | 37 FR 10842, 5/31/72 | |
| (25) XXV | Wyoming State Implementation Plan for Regional Haze for 309(g) | 5/23/2022 | 9/8/2025 | 90 FR 38005, 8/7/2025 | Excluding portions of the following: Chapters 6.4, 6.5.7, 6.5.8, and 7.5. EPA disapproved (1) the NO BART determinations for (a) Laramie River Units 1-3, (b) Dave Johnston Unit 3, and (c) Wyodak Unit 1; (2) the State's monitoring, recordkeeping, and reporting requirements for BART units; and (3) the State's reasonable progress goals. |
| (26)XXVI | Infrastructure SIP for Section 110(a)(2)(C) and (D)(i)(II) prong 3 for 2008 Ozone NAAQS | 02/06/2014 | 11/14/2016. | 81 FR 70364, 10/12/2016 | Only includes 111(a)(2)(C) and (D)(i)(II) prong 3 for 2008 Ozone NAAQS. |
| (27) XXVII | Interstate transport SIP for Section 110(a)(2)(D)(i) prong 1-2008 Ozone NAAQS; prongs 1, 2 and 4-2008 Pb NAAQS; prong 1 and 2-2010 NO NAAQS; prong 4-2010 SO NAAQS | 2/6/2014; 10/12/2011; 1/24/2014; 3/6/2015 | 3/6/2017 | 82 FR 9154, 2/3/17 | |
| (28) XXVIII | Infrastructure SIP for Section 110(a)(2)— 2008 Lead, 2008 Ozone, 2010 NO 2010 SO, and 2012 PM NAAQS | 10/12/2011, 2/6/2014, 1/24/2014, 3/6/2015, and 6/24/2016 | 5/25/2017 | 82 FR 18994, 4/25/17 | |
| (29) XXIX | Sheridan 1987 PM Limited Maintenance Plan | 12/14/2015 | 5/4/2018 | 83 FR 14374, 4/4/18 | |
| (30) XXX | Interstate transport SIP for Section 110(a)(2)(D)(i)(I) prongs 1 and 2 for the 2012 PM NAAQS | 6/24/2016 | 8/6/2018 | 83 FR 31330, 7/5/2018 | |
| (31) XXXI | Interstate transport SIP for Section 110(a)(2)(D)(i)(I) prongs 1 and 2 for the 2010 SO NAAQS. | 3/6/2015 | 10/1/2018 | 83 FR 44503, 8/31/2018 | |
| (32) XXXII | Wyoming State Implementation Plan 5-Year Progress Report for Regional Haze | 11/17/2017 | 7/27/2020 | 85 FR 38327, 6/26/2020 | |
| (33) XXXIII | Interstate transport SIP for Section 110(a)(2)(D)(i)(I) prong 2 for the 2008 Ozone NAAQS | August 30, 2018 | 5/10/2019 | 84 FR 14271, 4/10/2019 | |
| (34) XXXIV | Infrastructure SIP for section 110(a)(2)—2015 Ozone NAAQS | 1/3/2019 | 3/25/2020 | 85 FR 10306, 2/24/2020 | The EPA is not acting on (D)(i)(I) Prong 1, and (D)(i)(I) Prong 2. The EPA is disapproving (D)(i)(II) Prong 4. |
| (35) XXXV | Interstate transport SIP for section 110(a)(2)(D)(i)(I) prongs 1 and 2 for the 2015 Ozone NAAQS | 1/3/2019 | 1/18/2024 | 88 FR 87723, 12/19/2023 | |
| (36) XXXVI | Wyoming State Implementation Plan, Second Planning Period | 2022 | 1/2/2025 | 89 FR 95126, 12/2/2024 | Excluding the following: Chapters 3.4, 7, 8, 10, 11, 12, 13, 14, 15, and appendix C-E, G-M. EPA disapproved the portions of Wyoming's 2022 SIP submission relating to CAA section 169A and 40 CFR 51.308(f)(2): long-term strategy; 40 CFR 51.308(f)(3): reasonable progress goals; and 40 CFR 51.308(i): FLM consultation. |
[71 FR 64462, Nov. 2, 2006, as amended at 73 FR 26025, May 8, 2008; 73 FR 40752, July 16, 2008; 75 FR 19890, Apr. 16, 2010; 76 FR 44270, July 25, 2011; 77 FR 73933, Dec. 12, 2012; 78 FR 49690, Aug. 15, 2013; 78 FR 70000, Nov. 22, 2013; 78 FR 73448, Dec. 6, 2013; 79 FR 5219, Jan. 30, 2014; 79 FR 50843, Aug. 26, 2014; 79 FR 54912, Sept. 15, 2014; 79 FR 62861, Oct. 21, 2014; 80 FR 9201, Feb. 20, 2015; 80 FR 47859, Aug. 10, 2015; 80 FR 45609, July 31, 2015; 80 FR 68769, Nov. 6, 2015; 81 FR 35273, June 2, 2016; 81 FR 58399, Aug. 25, 2016; 81 FR 70364, Oct. 12, 2016; 82 FR 9154, Feb. 3, 2017; 82 FR 18994, Apr. 25, 2017; 83 FR 14374, Apr. 4, 2018; 83 FR 31330, July 5, 2018; 83 FR 44503, Aug. 31, 2018; 83 FR 47565, Sept. 20, 2018; 84 FR 10435, Mar. 21, 2019; 84 FR 14271, Apr. 10, 2019; 84 FR 22725, May 20, 2019; 85 FR 10306, Feb. 24, 2020; 85 FR 38327, June 26, 2020; 88 87723, Dec. 19, 2023; 89 FR 95126, Dec. 2, 2024; 90 FR 43917, Sept. 11, 2025]