The Environmental Protection Agency (EPA) is taking final action to approve elements of a state implementation plan (SIP) submission from Ohio regarding the infrastructure requirements of section 110 of the Clean Air Act (CAA) for the 2008 ozone National Ambient Air Quality Standards (NAAQS). The infrastructure requirements are designed to ensure that the structural components of each state's air quality management program are adequate to meet the state's responsibilities under the CAA. The proposed rulemaking associated with today's final action was published on July 25, 2014, and EPA received one comment pertaining to infrastructure for the 2008 ozone<INF></INF> NAAQS during the comment period, which ended on August 25, 2014. The 2008 lead (Pb), and 2010 Nitrogen Dioxide (NO<INF>2</INF>), and 2010 Sulfur Dioxide (SO<INF>2</INF>) infrastructure SIPs were also addressed in the proposed rulemaking but will be addressed in a separate final rulemaking.