The Environmental Protection Agency (EPA) is approving State Implementation Plan (SIP) revisions submitted by the State of New Hampshire. These revisions amend Testing and Monitoring Procedures for sources of air pollution; revise New Hampshire's Prevention of Significant Deterioration (PSD) permitting program with respect to requirements for air quality modeling; fully approve certain infrastructure SIP requirements as they related to PSD permitting requirements for the 2015 Ozone and 2012 fine particle matter (PM<INF>2.5</INF>) National Ambient Air Quality Standards (NAAQS); and amend Volatile Organic Compounds (VOCs) Reasonably Available Control Technology (RACT). This action is being taken under the Clean Air Act (CAA).