Findings of Failure To Submit State Implementation Plan; California; Interstate Transport Requirements for 2006 24-Hour Fine Particulate Matter (PM2.5) National Ambient Air Quality Standards

The U.S. Environmental Protection Agency (EPA) is making a finding that California has not submitted a State Implementation Plan (SIP) revision for the Clean Air Act (CAA or Act) provisions that require the SIP to contain adequate provisions to address the transport of air pollution to other states. Specifically, these requirements pertain to significant contribution to nonattainment, or interference with maintenance, of the 2006 24-hour fine particulate matter (PM<INF>2.5</INF>) national ambient air quality standards (NAAQS) in any other state. EPA refers to such submittals as "interstate transport" SIPs and often refers to the specific requirements addressed in this final rule as "prongs 1 and 2" since they address the first two of several interstate transport requirements. This finding of failure to submit establishes a deadline of 24 months after the effective date of this final rule for EPA to promulgate a Federal Implementation Plan (FIP) to address these two interstate transport requirements for California for the 2006 24-hour PM<INF>2.5</INF> NAAQS unless, prior to that time, the state submits, and EPA approves, a submittal that meets these requirements.