Approval and Promulgation of Implementation Plans and Designation of Areas for Air Quality Planning Purposes; New Hampshire; Redesignation of the Southern New Hampshire 1997 8-Hour Ozone Nonattainment Area

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EPA is proposing to approve: the State of New Hampshire's request to redesignate the Boston-Manchester-Portsmouth (SE), New Hampshire moderate 8-hour ozone nonattainment area to attainment for the 1997 8-hour ozone National Ambient Air Quality Standard (NAAQS); a State Implementation Plan (SIP) revision containing a 10-year maintenance plan for this area; a 2008 comprehensive emissions inventory for the area; and new motor vehicle emissions budgets (MVEBs) for the years 2008 and 2022 that are contained in the 10-year ozone maintenance plan for this area. Finally, EPA is proposing to withdraw the SIP-approved 2009 MVEBs and replace them with the 2008 MVEBs included in the maintenance plan.