The Environmental Protection Agency (EPA) is approving portions of three State Implementation Plan (SIP) submissions, submitted by the Commonwealth of Kentucky, Energy and Environment Cabinet, Department for Environmental Protection, through the Kentucky Division for Air Quality (KDAQ) on April 26, 2013 (two submissions), and February 8, 2016. The submissions address requirements for implementation of the 2012 Fine Particulate Matter (PM<INF>2.5</INF>), 2010 Nitrogen Dioxide (NO<INF>2</INF>), and 2010 Sulfur Dioxide (SO<INF>2</INF>) national ambient air quality standards (NAAQS). When EPA promulgates a new or revised NAAQS, the Clean Air Act (CAA or Act) requires the state to make a new SIP submission establishing that the existing SIP meets the various applicable requirements or revising the SIP to meet those requirements. This type of SIP submission is commonly referred to as an "infrastructure" SIP. EPA is approving the portions of these infrastructure SIP submissions from Kentucky that relate to the minor source program requirements for the 2012 PM<INF>2.5</INF>, 2010 NO<INF>2</INF>, and 2010 SO<INF>2</INF> NAAQS.