Approval and Promulgation of Implementation Plans; Alabama, Mississippi, and South Carolina; Certain Visibility Requirements for the 2008 Ozone Standards

The Environmental Protection Agency (EPA) is proposing to approve portions of submissions from Alabama, Mississippi, and South Carolina for inclusion into each State's implementation plan. This proposed action pertains to the Clean Air Act (CAA or Act) infrastructure requirements for the 2008 8-hour ozone National Ambient Air Quality Standards (NAAQS). The CAA requires that each state adopt and submit a state implementation plan (SIP) for the implementation, maintenance, and enforcement of each NAAQS promulgated by EPA. These submissions are commonly referred to as ``infrastructure SIPs submissions.'' Specifically, EPA is proposing to approve the portions of the submissions from Alabama, Mississippi, and South Carolina that pertain to a certain visibility requirement related to the 2008 8-hour ozone infrastructure SIPs for each state. All other applicable infrastructure requirements for the 2008 8-hour ozone NAAQS associated with these States' infrastructure submissions have been or will be addressed in separate rulemakings. In the Rules and Regulations section of this Federal Register, EPA is approving the State's implementation plan revision as a direct final rule without prior proposal because the Agency views this as a noncontroversial submittal and anticipates no adverse comments. A detailed rationale for the approval is set forth in the direct final rule. If EPA receives adverse comments, the direct final rule will be withdrawn and all public comments received will be addressed in a subsequent final rule based on this proposed rule.