Approval of Missouri Air Quality Implementation Plans; Redesignation of the Missouri Portion of the St. Louis-St. Charles-Farmington, MO-IL 2008 Ozone Area to Attainment

摘要

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 (NO X ) 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.