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Air Plan Approval; South Carolina; 2018 General Assembly New Source Review Update

The Environmental Protection Agency (EPA) is proposing to approve State Implementation Plan (SIP) revisions submitted by the State of South Carolina, through the South Carolina Department of Health and Environmental Control (SCDHEC or Department), on April 24, 2020. The SIP revisions update the State's Prevention of Significant Deterioration (PSD) and Nonattainment New Source Review (NNSR) regulations.

Publication Date: 
Thursday, July 29, 2021 - 4:00am

Air Plan Approval; Missouri; Open Burning; Withdrawal

The Environmental Protection Agency (EPA) is withdrawing its proposed rule to approve Missouri's revisions to the state's open burning rule, as published in the Federal Register on January 13, 2020. By a letter to the EPA dated May 26, 2021, Missouri withdrew its request for approval of revisions to this rule in the state implementation plan (SIP).

Publication Date: 
Monday, July 26, 2021 - 4:00am

New Source Review Regulations; Correction

The Environmental Protection Agency (EPA) is amending several New Source Review (NSR) regulations by making the following types of changes: Correcting typographical and grammatical errors, removing court vacated rule language, removing or updating outdated or incorrect cross references, conforming certain provisions to changes contained in the 1990 Clean Air Act (CAA or Act) Amendments, and removing certain outdated grandfathering or transitional exemptions.

Publication Date: 
Monday, July 19, 2021 - 4:00am

Approval and Promulgation of Implementation Plans; Utah; 2017 Base Year Inventories for the 2015 8-Hour Ozone National Ambient Air Quality Standard for the Uinta Basin, Northern Wasatch Front and Southern Wasatch Front Nonattainment Areas

The Environmental Protection Agency (EPA) is approving a state implementation plan (SIP) revision submitted by the State of Utah. The revision fulfills the base year inventory requirement for the 2015 8- hour ozone national ambient air quality standard (NAAQS) for the Uinta Basin, Northern Wasatch Front, and Southern Wasatch Front nonattainment areas (NAAs). Utah submitted the base year emissions inventories to meet, in part, the nonattainment requirements for Marginal ozone NAAs under the 2015 8-hour ozone NAAQS.

Publication Date: 
Tuesday, July 6, 2021 - 4:00am

Air Plan Approval; North Carolina; Mecklenburg Miscellaneous Rules Revisions

The Environmental Protection Agency (EPA) is proposing to approve a State Implementation Plan (SIP) revision to the Mecklenburg County portion of the North Carolina SIP, hereinafter referred to as the Mecklenburg Local Implementation Plan (LIP). The revision was submitted by the State of North Carolina, through the North Carolina Division of Air Quality (NCDAQ), on behalf of Mecklenburg County Air Quality (MCAQ) via a letter dated April 24, 2020, and was received by EPA on June 19, 2020.

Publication Date: 
Friday, July 2, 2021 - 4:00am

Improvements for Heavy-Duty Engine and Vehicle Test Procedures, and Other Technical Amendments

The Environmental Protection Agency (EPA) is amending the test procedures for heavy-duty engines and vehicles to improve accuracy and reduce testing burden. EPA is also making other regulatory amendments concerning light-duty vehicles, heavy-duty vehicles, highway motorcycles, locomotives, marine engines, other nonroad engines and vehicles, and stationary engines. These amendments affect the certification procedures for exhaust emission standards and related requirements.

Publication Date: 
Tuesday, June 29, 2021 - 4:00am

Approval and Promulgation of Implementation Plans; Montana; Butte PM10

The Environmental Protection Agency (EPA) is approving the Limited Maintenance Plan (LMP) submitted by the State of Montana to EPA on March 23, 2020, for the Butte Moderate nonattainment area (NAA) for particulate matter with an aerodynamic diameter less than or equal to a nominal 10 micrometers (PM<INF>10</INF>) and concurrently redesignate the NAA to attainment for the 24-hour PM<INF>10</INF> National Ambient Air Quality Standard (NAAQS).

Publication Date: 
Friday, June 25, 2021 - 4:00am

Air Plan Approval; Arizona; Maricopa County Air Quality Department

The Environmental Protection Agency (EPA) is proposing to approve revisions to the Maricopa County Air Quality Department's (MCAQD) Rule 510 as part of the Arizona State Implementation Plan (SIP). These rule revisions concern revisions to the maximum levels of ambient air pollution for the protection of public health and welfare. We are proposing to approve this rule to regulate these emissions under the Clean Air Act (CAA or the Act). We are taking comments on this proposal and plan to follow with a final action.

Publication Date: 
Wednesday, June 23, 2021 - 4:00am

Approval and Promulgation of Implementation Plans; Colorado; Revisions to Regulation Number 7; Aerospace, Oil and Gas, and Other RACT Requirements for 2008 8-Hour Ozone Standard for the Denver Metro/North Front Range Nonattainment Area

The Environmental Protection Agency (EPA) is proposing approval of State Implementation Plan (SIP) revisions submitted by the State of Colorado on May 14, 2018, May 8, 2019, and May 13, 2020. The revisions are to Colorado Air Quality Control Commission (Commission or AQCC) Regulation Number 7 (Reg. 7). The revisions to Reg.

Publication Date: 
Tuesday, June 22, 2021 - 4:00am

Air Plan Approval; Illinois; National Ambient Air Quality Standards Updates; Reference and Equivalent Methods Updates

The Environmental Protection Agency (EPA) is proposing to approve several revisions to the Illinois State Implementation Plan (SIP). First, EPA is proposing to approve amendments to the Illinois SIP that incorporate by reference EPA's current national ambient air quality standard (NAAQS) for ozone, particulate matter, lead, nitrogen dioxide, and sulfur oxides.

Publication Date: 
Monday, June 21, 2021 - 4:00am

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