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

The Environmental Protection Agency (EPA) is proposing to approve elements of a State Implementation Plan (SIP) submission from Maine that addresses the infrastructure requirements of the Clean Air Act (CAA or Act) for the 2012 fine particle (PM2.5) National Ambient Air Quality Standard (NAAQS). EPA is also proposing to conditionally approve one sub-element of Maine's infrastructure SIP. The infrastructure requirements are designed to ensure that the structural components of each state's air quality management program are adequate to meet the state's responsibilities with respect to this NAAQS under the CAA.