Environmental Protection Agency September 20, 2018 – Federal Register Recent Federal Regulation Documents

Pursuant to the Federal Clean Air Act (CAA or the Act), the Environmental Protection Agency (EPA) is approving portions of the Arkansas State Implementation Plan (SIP) submittal addressing the CAA requirement that SIPs address the potential for interstate transport of air pollution to significantly contribute to nonattainment or interfere with maintenance of the 2012 fine particulate matter (PM2.5) National Ambient Air Quality Standard (NAAQS) in other states. EPA finds that emissions from Arkansas sources do not contribute significantly to nonattainment in, or interfere with maintenance by, any other state with regard to the 2012 PM2.5 NAAQS. The EPA is also approving a revision to update incorporation by reference of NAAQS germane to the Arkansas SIP.

The Environmental Protection Agency (EPA) is approving eight State Implementation Plan (SIP) revisions submitted by the State of Wyoming; four submitted on March 27, 2017, and four submitted on March 28, 2018. The revisions include updates to incorporation by reference within several parts of the Wyoming Air Quality Standards and Regulations that are part of the SIP. Additional revisions are being approved that: Correct an inconsistency regarding internal combustion engine nitrogen oxide requirements; amend three state regulations to maintain consistency with federal regulations; and update a state internet address.

The Environmental Protection Agency (EPA) is taking final action to redesignate the Missouri portion of the St. Louis-St. Charles-Farmington, MO-IL nonattainment area (``St. Louis area'' or ``area'') to attainment for the 2008 ozone National Ambient Air Quality Standard (NAAQS). EPA is also approving, as a revision to the Missouri State Implementation Plan (SIP), the state's plan for maintaining the 2008 8-hour ozone NAAQS through 2030. Finally, EPA finds adequate and is approving, as a SIP revision, the State's 2030 volatile organic compound (VOC) and oxides of nitrogen (NOX) Motor Vehicle Emission Budgets (MVEBs) for the Missouri portion of the St. Louis area. The Missouri Department of Natural Resources (MDNR) submitted this request on September 12, 2016, with a supplemental submission on February 16, 2018. EPA addressed the Illinois portion of the St. Louis area in a separate rulemaking action published in the Federal Register on March 1, 2018.