Approval and Promulgation of Implementation Plans; Arkansas; Interstate Transport State Implementation Plan To Address Pollution Affecting Visibility

The Environmental Protection Agency (EPA) is proposing to disapprove a revision to the Arkansas State Implementation Plan (SIP) submitted by the State of Arkansas on September 16, 2009, for the purpose of addressing the requirements of the Clean Air Act (CAA) regarding interference with other states' programs for visibility protection for the 2006 revised 24-hour fine particulate matter (PM2.5) National Ambient Air Quality Standard (NAAQS). The EPA is proposing that the Federal Implementation Plan (FIP) we proposed on April 8, 2015, to address certain regional haze and visibility transport requirements for the State of Arkansas also remedies the deficiency created by our proposed disapproval of Arkansas' SIP submittal to address the requirement regarding interference with other states' programs for visibility protection for the 2006 PM2.5 NAAQS.