Greenhouse gases

Air Plan Approval; Montana; Revisions to Regional Haze State Implementation Plan and Partial Withdrawals to Regional Haze Federal Implementation Plan

The Environmental Protection Agency (EPA) is proposing to approve a State Implementation Plan (SIP) revision submitted by the State of Montana on March 25, 2020, addressing regional haze.

Publication Date: 
Friday, September 9, 2022 - 4:00am

Approval and Promulgation of Implementation Plans; State of Utah; Revisions to Utah Administrative Code: Environmental Quality; Title R307; Air Quality

The Environmental Protection Agency (EPA) is approving revisions to the Utah Division of Administrative Rules (DAR) submitted by the State of Utah on May 21, 2020, May 28, 2020, November 3, 2020, and November 12, 2020. The EPA is taking this action pursuant to the Clean Air Act (CAA).

Publication Date: 
Thursday, September 8, 2022 - 4:00am

Air Plan Approval; North Dakota; Removal of Exemptions to Visible Air Emissions Restrictions

The Environmental Protection Agency (EPA) is taking final action to approve a revision to North Dakota's State Implementation Plan (SIP) which it received on November 11, 2016. The revision was submitted by the North Dakota Department of Health (NDDH) in response to EPA's finding of substantial inadequacy and SIP call published on June 12, 2015 for a provision in the North Dakota SIP related to excess emissions during startup, shutdown, and malfunction (SSM) events.

Publication Date: 
Tuesday, August 2, 2022 - 4:00am

Improvements for Heavy-Duty Engine and Vehicle Test Procedures

This final rule includes corrections, clarifications, additional flexibilities, and adjustment factors to improve the Greenhouse gas Emissions Model (GEM) compliance tool for heavy-duty vehicles while more closely matching the outputs produced by the original GEM version 3.0 that was used to establish the CO<INF>2</INF> standards for Model Years 2021 and later in the 2016 Heavy-duty Phase 2 final rule. Given the nature of this rule, there will be neither significant environmental impacts nor significant economic impacts.

Publication Date: 
Thursday, July 28, 2022 - 4:00am

Approval and Promulgation of Implementation Plans; Montana; Thompson Falls PM10

The Environmental Protection Agency (EPA) is approving the Limited Maintenance Plan (LMP) submitted by the State of Montana to EPA on November 4, 2021, for the Thompson Falls 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 redesignating the NAA to attainment for the 24-hour PM<INF>10</INF> National Ambient Air Quality Standard (NAAQS).

Publication Date: 
Wednesday, June 8, 2022 - 4:00am

Approval and Promulgation of Implementation Plans; Montana; Whitefish PM10

The Environmental Protection Agency (EPA) is approving the Limited Maintenance Plan (LMP) submitted by the State of Montana to EPA on August 6, 2021, for the Whitefish 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 redesignating the NAA to attainment for the 24-hour PM<INF>10</INF> National Ambient Air Quality Standard (NAAQS).

Publication Date: 
Wednesday, June 8, 2022 - 4:00am

Approval of Clean Air Act Operating Permit Program Revisions; Negative Declaration of Existing Hospital/Medical/Infectious Waste Incinerators and Administrative Updates; South Dakota

The Environmental Protection Agency (EPA or the ``Agency'') is proposing full approval of revisions to the South Dakota operating permit program for stationary sources under the Clean Air Act (CAA), title V (the ``title V program'') and a Clean Air Act (CAA) section 111(d)/129 negative declaration for incinerators subject to the Hospital/Medical/Infectious Waste Incinerators (HMIWI) Emissions Guidelines. EPA is proposing this action in accordance with the CAA.

Publication Date: 
Wednesday, May 18, 2022 - 4:00am

Air Plan Conditional Approval; Colorado; Revisions to Regulation Number 7 and Oil and Natural Gas RACT Requirements for 2008 8-Hour Ozone Standard for the Denver Metro/North Front Range Nonattainment Area

The Environmental Protection Agency (EPA) is conditionally approving portions of State Implementation Plan (SIP) revisions submitted by the State of Colorado on May 14, 2018 and May 13, 2020.

Publication Date: 
Friday, May 13, 2022 - 4:00am

Air Plan Approval; Colorado; Denver Metro/North Front Range Nonattainment Area; Nonattainment NSR Permit Program Certification for the 2015 8-Hour Ozone Standard

The Environmental Protection Agency (EPA) is approving a state implementation plan (SIP) revision submitted by the State of Colorado. The submittal certifies that the State of Colorado has fulfilled, through previous SIP revisions, Nonattainment New Source Review (NNSR) Permit Program requirements under the 2015 8-hour ozone National Ambient Air Quality Standards (NAAQS) for the Denver Metro/North Front Range (DMNFR) area. The State of Colorado submitted the certification to meet the nonattainment requirements for Marginal ozone nonattainment areas (NAAs) for the 2015 8-hour ozone NAAQS.

Publication Date: 
Friday, May 13, 2022 - 4:00am

Air Plan Approval; South Dakota; Revisions to South Dakota Codified Law and Administrative Rules of South Dakota

With this direct final rule, the Environmental Protection Agency (EPA or the ``Agency'') is promulgating approval of South Dakota's submittal requesting that EPA recognize the merger of South Dakota's Department of Agriculture (DOA) with the Department of Environment and Natural Resources (DENR) to form the new Department of Agriculture and Natural Resources (DANR) and incorporate corresponding non-substantive revisions to the South Dakota Codified Law (SDCL) and the Administrative Rules of South Dakota (ARSD) into South Dakota's Implementation Plan.

Publication Date: 
Monday, April 11, 2022 - 4:00am

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