Carbon monoxide

Air Plan Disapproval; Louisiana; Excess Emissions

Pursuant to the Federal Clean Air Act (CAA or the Act), the Environmental Protection Agency (EPA) is disapproving a State Implementation Plan (SIP) revision submitted by the State of Louisiana, through the Louisiana Department of Environmental Quality (LDEQ), on November 20, 2016, and supplemented on June 9, 2017. The submittals were in response to the EPA's national SIP call on June 12, 2015, concerning excess emissions during periods of Startup, Shutdown, and Malfunction (SSM).

Publication Date: 
Thursday, December 7, 2023 - 4:00am

Air Plan Approval and Disapproval; Colorado; Serious Attainment Plan Elements and Related Revisions for the 2008 8-Hour Ozone Standard for the Denver Metro/North Front Range Nonattainment Area

The Environmental Protection Agency (EPA) is approving portions and disapproving portions of a state implementation plan (SIP) revision submitted by the State of Colorado to meet Clean Air Act (CAA) requirements for the 2008 8-hour ozone national ambient air quality standards (NAAQS) in the Denver Metro/North Front Range nonattainment area (DMNFR Area). Specifically, the EPA is approving the submitted enhanced monitoring SIP element as meeting applicable Serious area requirements for the 2008 8-hour ozone NAAQS, and is disapproving the contingency measure element of the SIP submittal.

Publication Date: 
Tuesday, November 7, 2023 - 4:00am

Air Plan Approval; South Carolina: New Source Review Updates

The Environmental Protection Agency (EPA) is finalizing approval of a State Implementation Plan (SIP) revision submitted by the State of South Carolina, through the South Carolina Department of Health and Environmental Control (hereinafter referred to as SC DHEC or South Carolina) via a letter dated February 3, 2022. The SIP revision updates portions of South Carolina's Prevention of Significant Deterioration (PSD) and Nonattainment New Source Review (NNSR) regulations that pertain to Project Emissions Accounting (PEA) provisions.

Publication Date: 
Wednesday, October 4, 2023 - 4:00am

Air Plan Approval; MO; Control of Emissions From Volatile Organic Liquid Storage

The Environmental Protection Agency (EPA) is taking final action to approve revisions to the Missouri State Implementation Plan (SIP) related to the control of emissions from volatile organic liquid storage. These revisions do not impact the stringency of the SIP or have an adverse effect on air quality. The EPA's approval of this rule revision is being done in accordance with the requirements of the Clean Air Act (CAA).

Publication Date: 
Wednesday, October 4, 2023 - 4:00am

Air Plan Approval; Washington; Southwest Clean Air Agency, General Air Quality Regulations

The Environmental Protection Agency (EPA) is approving revisions to the Washington State Implementation Plan (SIP) that were submitted on June 22, 2023, by the Department of Ecology in coordination with the Southwest Clean Air Agency (SWCAA). In 2017, the EPA approved a comprehensive update to SWCAA 400 General Regulations for Air Pollution Sources in the SIP, which includes new source review permitting requirements as well as other general requirements for sources regulated under SWCAA's jurisdiction.

Publication Date: 
Friday, September 29, 2023 - 4:00am

Air Plan Approval; Washington; Southwest Clean Air Agency; Emission Standards and Controls for Sources Emitting Gasoline Vapors

The Environmental Protection Agency (EPA) is approving a revision to the Washington State Implementation Plan (SIP) for the Southwest Clean Air Agency (SWCAA) jurisdiction as it relates to the ozone National Ambient Air Quality Standard.

Publication Date: 
Thursday, September 28, 2023 - 4:00am

Air Plan Approval; Missouri; Revisions to the Cross-State Air Pollution Rule SO2 Group 1 Trading Program

The Environmental Protection Agency (EPA) is taking final action to approve revisions to the State Implementation Plan (SIP) submitted on November 29, 2021, by the State of Missouri. This final action approves revisions to a state regulation related to the Cross- State Air Pollution Rule SO<INF>2</INF> Group 1 Trading Program. The revisions alter the amounts of CSAPR SO<INF>2</INF> Group 1 emission allowances that are allocated to two of the state's units from the state's annual emissions budgets.

Publication Date: 
Friday, September 15, 2023 - 4:00am

Air Plan Approval; California; San Diego County Air Pollution Control District; Oxides of Nitrogen

The Environmental Protection Agency (EPA) is taking final action to approve a revision to the San Diego County Air Pollution Control District (SDCAPCD) portion of the California State Implementation Plan (SIP). The California Air Resources Board (CARB) submitted the rule, on behalf of SDCAPCD, to the EPA as part of the requirement to implement major source reasonable available control technology (RACT) for emissions of oxides of nitrogen (NO<INF>X</INF>) for the San Diego County ozone nonattainment area.

Publication Date: 
Wednesday, August 23, 2023 - 4:00am

Air Plan Approval; AK; Revisions to Ice Fog and Sulfur Dioxide Regulations

The Environmental Protection Agency (EPA) is approving a revision to the Alaska State Implementation Plan (SIP) submitted on May 16, 2022. In the submission, Alaska revised and repealed State regulations originally put in place to limit water vapor emissions that may contribute to ice fog and to address the use of high-sulfur marine fuels near the communities of St. Paul Island and Unalaska. Alaska determined that the regulations are obsolete due to technology improvements and regulatory changes, including Federal sulfur content in fuel restrictions.

Publication Date: 
Wednesday, August 9, 2023 - 4:00am

Air Plan Approval; TN; 2010 1-Hour SO2 NAAQS Transport Infrastructure

The Environmental Protection Agency (EPA) is approving Tennessee's July 31, 2019, State Implementation Plan (SIP) submission pertaining to the ``good neighbor'' provision of the Clean Air Act (CAA or Act) for the 2010 1-hour sulfur dioxide (SO<INF>2</INF>) National Ambient Air Quality Standard (NAAQS). The good neighbor provision requires each State's implementation plan to contain adequate provisions prohibiting the interstate transport of air pollution in amounts that will contribute significantly to nonattainment, or interfere with maintenance, of a NAAQS in any other State.

Publication Date: 
Wednesday, August 9, 2023 - 4:00am

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