Approval and Promulgation of Implementation Plans; State of Mississippi: Prevention of Significant Deterioration Rules: Nitrogen Oxide as a Precursor to Ozone

摘要

EPA is proposing to approve a portion of a revision to the Mississippi State Implementation Plan (SIP), submitted by the Mississippi Department of Environmental Quality (MDEQ), to EPA on November 28, 2007. The revision modifies Mississippi's prevention of significant deterioration (PSD) permitting regulations in the SIP to address permit requirements promulgated in the 1997 8-Hour Ozone National Ambient Air Quality Standards (NAAQS) Implementation Rule- Phase II (hereafter referred to as the "Ozone Implementation New Source Review (NSR) Update"). The Ozone Implementation NSR Update revised permit requirements relating to the implementation of the 1997 8-hour ozone NAAQS specifically incorporating nitrogen oxides (NO X ) as a precursor to ozone. Specifically, this SIP revision incorporates by reference the Ozone Implementation NSR Update federal regulations into the Mississippi SIP through Air Pollution Control Section 5 (APC-S-5) "Regulations for the Prevention of Significant Deterioration of Air Quality." EPA's approval of Mississippi's incorporation by reference of the Ozone Implementation NSR Update federal regulations, including provisions to recognize NO X as an ozone precurso