The Environmental Protection Agency (EPA) is approving a State Implementation Plan (SIP) revision submitted by the State of Vermont. The revision sets the amount of PM<INF>2.5</INF> increment sources are permitted to consume when obtaining a prevention of significant deterioration (PSD) preconstruction permit and requires PM<INF>2.5</INF> emission offsets under certain circumstances. This action is being taken in accordance with the Clean Air Act.