The Environmental Protection Agency (EPA) is taking final action to approve the State of Missouri's request to remove its State Implementation Plan (SIP) for maintaining the 1978 Lead National Ambient Air Quality Standards (NAAQS) in portions of Iron County, Missouri, surrounding the former Glover smelter, and replace the maintenance plan with a plan for continued attainment of the 2008 Lead NAAQS regardless of ownership and/or operational status of the Glover facility.