Approval and Promulgation of Air Quality Implementation Plans; Maine; Redesignation of the Portland, Maine Moderate Ozone Nonattainment Area to Attainment, Determination of Attainment and Approval of the Associated Maintenance Plan; or Determination of Nonattainment as of November 15, 1997 and Reclassification of the Portland, Maine Area

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EPA is proposing in the alternative either to redesignate the Portland, Maine moderate ozone nonattainment area (the Portland Area) to attainment for the 1-hour ozone National Ambient Air Quality Standard (NAAQS), or to determine that the Portland Area did not attain by November 15, 1997, and thus must be reclassified to serious. The Portland Area is comprised of three counties in Maine; Cumberland, Sagadahoc, and York. EPA is proposing to determine that the Portland Area has attained the NAAQS. This determination is based on three years of complete quality-assured ambient air monitoring data for the 1999- 2001 ozone seasons. The EPA is also proposing to approve the maintenance plan, submitted by the Maine Department of Environmental Protection as a revision to the Maine State Implementation Plan (SIP). Approval of the maintenance plan would put into place a plan for maintaining the 1-hour ozone standard for the next 10 years in the Portland Area. EPA is also proposing to approve Maine's 1999 attainment inventory for the Portland Area into the Maine State Implementation Plan. This inventory establishes a 1999 ozone emission inventory of volatile organic compounds and oxides of nitr