Air Plan Approval; Missouri; Restriction of Emission of Lead From Specific Lead Smelter-Refinery Installations

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The Environmental Protection Agency (EPA) is approving a State Implementation Plan (SIP) revision submitted by Missouri on February 5, 2019. Missouri requested that EPA revise its approved plan which restricts emission of lead from specific lead smelter-refinery installations. The revisions remove emission restrictions for a facility that is no longer operating, update a reference to the Federal National Emissions Standard for Hazardous Air Pollutants (NESHAP) for secondary lead smelters, and update incorporation by reference to testing methods. Minor editorial revisions have also been made for clarity. The EPA's approval of this rule revision is being done in accordance with the requirements of the Clean Air Act (CAA).