Air Plan Approval; Ohio; Approval of Sulfur Dioxide Regulations

The Environmental Protection Agency (EPA) is proposing to approve, under the Clean Air Act, Ohio's revised sulfur dioxide (SO2) regulations, which Ohio submitted to EPA on March 13, 2017. Ohio updated its regulations to correct facility information which has changed and to add new emission limits for selected sources in Lake and Jefferson Counties. The revised regulations do not impose substantive changes or additional emission restrictions upon the Ohio State Implementation Plan (SIP) except for the site-specific provisions which have been revised in response to Ohio's nonattainment area designations of August 5, 2013. EPA is proposing to approve the majority of the revised regulations which the state submitted. EPA proposes to take no action on a portion of one submitted rule, which has never been federally approved. EPA also proposes to remove one rule from the SIP, which Ohio rescinded and replaced in 2009.