Air Plan Approval; Massachusetts; Infrastructure State Implementation Plan Requirements for the 2012 PM2.5 NAAQS

The Environmental Protection Agency (EPA) is approving most elements of a State Implementation Plan (SIP) revision submitted by the Commonwealth of Massachusetts for the infrastructure requirements for the 2012 fine particle (PM<INF>2.5</INF>) National Ambient Air Quality Standard (NAAQS), including the interstate transport requirements. We are making findings of failure to submit for the prevention of significant deterioration (PSD) requirements of infrastructure SIPs for the 2012 PM<INF>2.5</INF> NAAQS. For infrastructure SIP requirements for the 1997 and 2006 PM<INF>2.5</INF> NAAQS, we are also approving previously unaddressed elements and converting certain previous conditional approvals to full approval. We are also converting to full approvals previous conditional approvals for the 1997 and 2008 ozone, 2008 lead, 2010 sulfur dioxide, and 2010 nitrogen dioxide NAAQS. Finally, EPA is approving five new or amended definitions regarding the NAAQS and Particulate Matter and a state Executive Order regarding consultation by state agencies with local governments. This action is being taken in accordance with the Clean Air Act.