Particulate matter

Approval and Promulgation of Implementation Plans; State of Utah; Salt Lake City and Provo, Utah PM2.5

On November 6, 2020, the Environmental Protection Agency (EPA) published a notice of proposed rulemaking to approve redesignation of the Salt Lake City, Utah and Provo, Utah nonattainment areas (NAAs) to attainment for the 2006 24-hour fine particulate matter with an aerodynamic diameter less than or equal to a nominal 2.5 microns (PM<INF>2.5</INF>) National Ambient Air Quality Standard (NAAQS), and also acted on multiple related State Implementation Plan (SIP) submissions.

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

Approval and Promulgation of Implementation Plans; North Dakota; Revisions to Air Pollution Control Rules; Regional Haze

The Environmental Protection Agency (EPA) is proposing to approve a revision to the North Dakota State Implementation Plan (SIP) submitted by the State of North Dakota on November 11, 2016 and supplemented on March 15, 2021, that addresses amendments to the regional haze provisions of the North Dakota Administrative Code (NDAC). These revisions were submitted to remove certain regional haze requirements related to Best Available Retrofit Technology (BART) in the first planning period.

Publication Date: 
Thursday, April 1, 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 proposing to approve 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. Utah submitted the base year emissions inventories to meet, in part, the nonattainment requirements for Marginal ozone nonattainment areas under the 2015 8- hour ozone NAAQS.

Publication Date: 
Thursday, April 1, 2021 - 4:00am

Partial Approval and Partial Disapproval of Air Quality State Implementation Plans; California; Infrastructure Requirements for Ozone

The Environmental Protection Agency (EPA) is taking final action to partially approve and partially disapprove the state implementation plan (SIP) revisions submitted by the State of California pursuant to the requirements of the Clean Air Act (CAA or ``Act'') for the implementation, maintenance, and enforcement of the 2015 national ambient air quality standards (NAAQS or ``standards'') for ozone. Specifically, the EPA is approving the SIP revision for all elements except those that relate to prevention of significant deterioration (PSD).

Publication Date: 
Tuesday, March 30, 2021 - 4:00am

Air Plan Approval; Texas; Interstate Visibility Transport

Pursuant to the Federal Clean Air Act (CAA or the Act), the Environmental Protection Agency (EPA) is disapproving elements of two State Implementation Plan (SIP) submissions from the State of Texas for the 2012 PM<INF>2.5</INF> National Ambient Air Quality Standard (NAAQS) and the 2015 Ozone NAAQS. These submittals address how the existing SIP provides for implementation, maintenance, and enforcement of the 2012 PM<INF>2.5</INF> and 2015 Ozone NAAQS (infrastructure SIP or i-SIP).

Publication Date: 
Tuesday, March 30, 2021 - 4:00am

Air Plan Approval; Indiana; Monitoring Requirements

The Environmental Protection Agency (EPA) is proposing to approve a revision to Indiana's State Implementation Plan (SIP) to address changes to its air emissions monitoring rules for Portland cement plants. Indiana revised its rules for Portland cement plants to update the monitoring of particulate matter (PM) emissions to allow the use an additional monitoring method. This additional monitoring option is consistent with EPA's recent revisions to Federal requirements for Portland cement plants.

Publication Date: 
Thursday, March 25, 2021 - 4:00am

Air Plan Approval; Maine; Removal of Reliance on Reformulated Gasoline in the Southern Counties of Maine

The Environmental Protection Agency (EPA) is proposing to approve a State Implementation Plan (SIP) revision submitted by the State of Maine on August 20, 2020. The Maine Department of Environmental Protection (Maine DEP) submission is in support of the State's separate petition requesting that EPA remove the federal reformulated gasoline (RFG) requirements for York, Cumberland, Sagadahoc, Androscoggin, Kennebec, Knox and Lincoln Counties (hereinafter referred to as the ``southern Maine counties'').

Publication Date: 
Thursday, March 25, 2021 - 4:00am

Air Plan Approval; Delaware; Nonattainment New Source Review Requirements for 2015 8-Hour Ozone National Ambient Air Quality Standard

The Environmental Protection Agency (EPA) is proposing to approve a state implementation plan (SIP) revision submitted by the Delaware Department of Natural Resources and Environmental Control (DNREC). This SIP revision will fulfill Delaware's nonattainment new source review (NNSR) SIP element requirement for the 2015 8-hour ozone National Ambient Air Quality Standard (NAAQS). This action is being taken under the Clean Air Act (CAA).

Publication Date: 
Wednesday, March 24, 2021 - 4:00am

Air Plan Approval; Arkansas; Regional Haze and Interstate Visibility Transport Federal Implementation Plan; Withdrawal of Federal Implementation Plan Provisions for the Domtar Ashdown Mill

The Environmental Protection Agency (EPA) is taking final action to withdraw the remaining portion of a Federal Implementation Plan (FIP) for Arkansas that was published in the Federal Register on September 27, 2016, which addressed certain regional haze obligations for the first implementation period for the Domtar Ashdown Mill.

Publication Date: 
Monday, March 22, 2021 - 4:00am

Air Plan Approval; Arkansas; Arkansas Regional Haze and Visibility Transport State Implementation Plan Revisions

Pursuant to the Clean Air Act (CAA or the Act), the Environmental Protection Agency (EPA) is finalizing approval of a revision to the Arkansas State Implementation Plan (SIP) submitted by the State of Arkansas through the Arkansas Department of Energy and Environment, Division of Environmental Quality (DEQ) on August 13, 2019. The SIP submittal addresses requirements of the Act and the Regional Haze Rule for visibility protection in mandatory Class I Federal areas (Class I areas) for the first implementation period.

Publication Date: 
Monday, March 22, 2021 - 4:00am

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