The Environmental Protection Agency (EPA) is approving a State Implementation Plan (SIP) revision submitted by the State of New Hampshire that addresses the infrastructure requirements of the Clean Air Act (CAA or Act), excluding the interstate transport provisions, for the 2015 ozone National Ambient Air Quality Standards (NAAQS). We are also granting the state an exemption from the infrastructure SIP contingency plan obligation for ozone and are conditionally approving several elements of New Hampshire's submittal relating to air-quality modeling requirements.

The Environmental Protection Agency (EPA) is approving a redesignation request and state implementation plan (SIP) revisions submitted by the State of West Virginia related to the 2010 primary national ambient air quality standard (NAAQS or Standard) for sulfur dioxide (SO<INF>2</INF>) (2010 SO<INF>2</INF> NAAQS).

The Environmental Protection Agency (EPA) is approving a state implementation plan (SIP) revision submitted by the Commonwealth of Pennsylvania. The revision is an attainment plan for the 2010 sulfur dioxide (SO<INF>2</INF>) primary national ambient air quality standard (NAAQS) in the Indiana County, Pennsylvania SO<INF>2</INF> nonattainment area (hereafter referred to as the ``Indiana Area'' or ``Area''). The Indiana Area is comprised of Indiana County and a portion of Armstrong County (Plumcreek Township, South Bend Township, and Elderton Borough) in Pennsylvania.

The Environmental Protection Agency (EPA) is approving a State Implementation Plan (SIP) revision submitted by the Commonwealth of Massachusetts. The SIP revision consists of a demonstration that Massachusetts meets the requirements of reasonably available control technology (RACT) for the two precursors for ground-level ozone, oxides of nitrogen (NO<INF>X</INF>) and volatile organic compounds (VOCs), set forth by the Clean Air Act (CAA or Act) with respect to the 2008 and 2015 ozone National Ambient Air Quality Standards (NAAQSs or standards).