Approval and Promulgation of Implementation Plans; Indiana; Oxides of Nitrogen Regulations

The EPA is proposing to approve, through direct final procedure, revisions to the oxides of nitrogen budget trading program plan submitted by Indiana on June 26, 2003, and August 4, 2003. These changes revise Indiana's NO<INF>X</INF> State Implementation Plan (SIP) and NO<INF>X</INF> budget approved by EPA on November 8, 2001. The most significant change adds three sources to the NO<INF>X</INF> trading portion of the Indiana plan. The plan revision also includes: A compliance date change to accommodate revised deadlines under the NO<INF>X</INF> SIP call; a revised definition of "energy efficiency project" to include anaerobic digestion systems; the addition of formulas to describe an energy efficiency and renewable energy "set aside"; and minor wording changes and correction of typographical errors. These changes are consistent with Indiana's previously approved "Phase I budget." In the Final Rules section of this Federal Register, EPA is approving these revisions to the State plan for oxides of nitrogen as a direct final rule without prior proposal because we view this action as noncontroversial and anticipate no adverse comments. If no written adverse comments are received in response to the direct final rule, no further activity is contemplated in relation to this proposed rule. If EPA receives meaningful written adverse comments, the direct final rule will be withdrawn and all public comments received will be addressed in a subsequent final rule based on this proposed rule. If no adverse written comments are received, the direct final rule will take effect on the date stated in that document and no further activity will be taken on this proposed rule. Any party interested in commenting on this action should do so at this time.