Approval and Promulgation of Air Quality Implementation Plans; Maine; Infrastructure State Implementation Plan Requirements

The Environmental Protection Agency (EPA) is proposing to approve elements of State Implementation Plan (SIP) submissions from Maine regarding the infrastructure requirements of the Clean Air Act (CAA or Act) for the 2008 lead (Pb), 2008 ozone, and 2010 nitrogen dioxide (NO2) National Ambient Air Quality Standards (NAAQS). EPA is also proposing to conditionally approve one element of Maine's infrastructure SIP. Finally, EPA is proposing to approve several statutes submitted by Maine in support of its demonstrations that the infrastructure requirements of the CAA have been met. 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 under the CAA.