Sulfur oxides

Air Plan Approval; Michigan; Part 4 Rule

The Environmental Protection Agency (EPA) is approving a revision to Michigan's State Implementation Plan (SIP). The Michigan Department of Environment, Great Lakes, and Energy (EGLE) submitted on August 17, 2022, changes to Michigan's Air Pollution Control Rules, Emissions Limitations and Prohibitions--Sulfur Bearing Compounds. The revision includes administrative changes to existing rules and updates to material adopted by reference.

Publication Date: 
Monday, April 24, 2023 - 4:00am

Air Plan Approval; ID; Incorporation by Reference Updates

The Environmental Protection Agency (EPA) is approving a revision to the Idaho State Implementation Plan (SIP) submitted on May 4, 2022. The submission updates the incorporation by reference of the national ambient air quality standards and related planning and monitoring requirements into the Idaho air quality rules as of July 1, 2021. Idaho undertakes such updates regularly to ensure the state air quality rules and the federally enforceable Idaho SIP remain consistent with EPA air quality regulations over time.

Publication Date: 
Wednesday, March 29, 2023 - 4:00am

Air Plan Approval; AK; Adoption and Permitting Rule Updates

The Environmental Protection Agency (EPA) is approving revisions to the Alaska State Implementation Plan submitted on May 16, 2022, and August 11, 2022. The revisions update Alaska's adoption by reference date for Federal regulations relied upon for implementation of the air program, including permitting requirements and air pollution test methods.

Publication Date: 
Wednesday, March 22, 2023 - 4:00am

Air Plan Approval; Indiana; Revisions to Particulate Matter Rules; Vertellus

The Environmental Protection Agency (EPA) is approving a revision to the Indiana particulate matter State Implementation Plan (SIP) that Indiana submitted to EPA on September 16, 2021, for the Vertellus Agriculture and Nutrition Specialties, LLC (Vertellus) facility located in Indianapolis, Marion County. Indiana requested revisions to incorporate site-specific updates to the particulate matter emission limits for Vertellus. The updates reflect revised emission rates for particulate matter resulting from process changes related to control strategies for other pollutants.

Publication Date: 
Wednesday, March 22, 2023 - 4:00am

Approval and Promulgation of State Plans for Designated Facilities and Pollutants: Maine; 111(d)/129 Revised State Plan for Large Municipal Waste Combustors and State Plan for Small Municipal Waste Combustors

The Environmental Protection Agency (EPA) is approving the Clean Air Act (CAA) State Plan for Municipal Waste Combustor (MWC) units submitted by the Maine Department of Environmental Protection (Maine DEP). This submission includes revisions to Maine's previously approved State Plan for existing Large MWCs in response to amended emission guidelines (EGs) for Large MWCs. This submission also includes a State Plan for existing Small MWCs.

Publication Date: 
Tuesday, March 14, 2023 - 4:00am

Air Plan Approval; MO; Restriction of Visible Air Contaminant Emissions

The Environmental Protection Agency (EPA) is taking final action to approve revisions to the Missouri State Implementation Plan (SIP) received on November 29, 2016, and March 7, 2019. The revisions were submitted by Missouri in response to a finding of substantial inadequacy and SIP call published on June 12, 2015, for a provision in the Missouri SIP related to excess emissions during startup, shutdown, and malfunction (SSM) events. In the submissions, Missouri requests to revise a regulation related to restriction of emissions of visible air contaminants.

Publication Date: 
Wednesday, March 8, 2023 - 4:00am

Air Plan Approval; New Mexico; Excess Emissions

Pursuant to the Federal Clean Air Act (CAA, the Act), the Environmental Protection Agency (EPA) is approving a State Implementation Plan (SIP) revision submitted by the New Mexico Environment Department (NMED) on October 13, 2016. The revision was submitted in response to a finding of substantial inadequacy and SIP call as published by EPA on June 12, 2015, concerning excess emissions during periods of startup, shutdown, and malfunction (SSM) events.

Publication Date: 
Friday, March 3, 2023 - 4:00am

Air Plan Approval; Kentucky; Revision to Federally Enforceable District Origin Operating Permits

The Environmental Protection Agency (EPA) is approving a revision to the Jefferson County portion of the Kentucky State Implementation Plan (SIP) submitted by the Commonwealth of Kentucky through the Kentucky Energy and Environment Cabinet (Cabinet) on June 15, 2022. The changes were submitted by the Cabinet on behalf of the Louisville Metro Air Pollution Control District (District, also referred to herein as Jefferson County).

Publication Date: 
Wednesday, March 1, 2023 - 4:00am

National Emission Standards for Hazardous Air Pollutants: Miscellaneous Coating Manufacturing Technology Review

The U.S. Environmental Protection Agency (EPA) is taking final action on the technology review conducted on the Miscellaneous Coating Manufacturing (MCM) source category regulated under the National Emission Standards for Hazardous Air Pollutants (NESHAP). These final amendments include provisions for inorganic hazardous air pollutant (HAP) standards for process vessels.

Publication Date: 
Wednesday, February 22, 2023 - 4:00am

Air Plan Approval; Illinois; Alton Township 2010 SO2

The Environmental Protection Agency (EPA) is approving the State Implementation Plan (SIP) revision which Illinois submitted to EPA on December 31, 2018, for attaining the 1-hour sulfur dioxide (SO<INF>2</INF>) primary national ambient air quality standard (NAAQS) for the Alton Township nonattainment area in Madison County.

Publication Date: 
Tuesday, February 21, 2023 - 4:00am

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