52.1534—Control strategy: Ozone.
(a)
Revisions to the State Implementation Plan submitted by the New Hampshire Department of Environmental Services on September 27, 1996. These revisions are for the purpose of satisfying the rate of progress requirement of section 182(c)(2)(B), and the contingency measure requirements of section 182(c)(9) of the Clean Air Act, for the Portsmouth-Dover-Rochester serious area, and the New Hampshire portion of the Boston-Lawrence-Worcester serious area.
(b)
Approval—Revisions to the State Implementation Plan submitted by the New Hampshire Department of Environmental Protection on June 1, 1998. The revisions are for the purpose of satisfying the one-hour ozone attainment demonstration requirements of section 182(c)(2)(A) of the Clean Air Act, for the Boston-Lawrence-Worcester, MA-NH serious ozone nonattainment area. The revision establishes a one-hour attainment date of November 15, 2007 for the Boston-Lawrence-Worcester, MA-NH serious ozone nonattainment area. This revision establishes motor vehicle emissions budgets of 10.72 tons per day of volatile organic compounds (VOC) and 21.37 tons per day of nitrogen oxides (NOX) to be used in transportation conformity in the New Hampshire portion of the Boston-Lawrence-Worcester, MA-NH serious ozone nonattainment area.
(c) Determination of Attainment.
Effective March 18, 2008, EPA is determining that the Boston-Manchester-Portsmouth (SE), New Hampshire 8-hour ozone nonattainment area has attained the 8-hour ozone standard. Under the provisions of EPA's ozone implementation rule (see 40 CFR 51.918 ), this determination suspends the reasonable further progress and attainment demonstration requirements of section 182(b)(1) and related requirements of section 172(c)(9) of the Clean Air Act for as long as the area does not monitor any violations of the 8-hour ozone standard. If a violation of the ozone NAAQS is monitored in the Boston-Manchester-Portsmouth (SE), New Hampshire 8-hour ozone nonattainment area, this determination shall no longer apply.
(d)
Approval—Revision to the State Implementation Plan submitted by the New Hampshire Department of Environmental Services on May 28, 2008. This revision establishes Year 2009 motor vehicle emission budgets of 15.31 tons per summer day of volatile organic compounds (VOC) and 28.53 tons per summer day of nitrogen oxides (NOX) to be used in transportation conformity in the Boston-Manchester-Portsmouth (SE), New Hampshire moderate 8-hour ozone nonattainment area.
(e)
Determination of Attainment. Effective April 18, 2011, EPA is determining that the Boston-Manchester-Portsmouth (SE), New Hampshire 8-hour ozone nonattainment area has attained the 1997 8-hour ozone standard based on 2007-2009 monitoring data. Under the provisions of EPA's ozone implementation rule (see 40 CFR 51.918 ), this determination suspends the reasonable further progress and attainment demonstration requirements of section 182(b)(1) and related requirements of section 172(c)(9) of the Clean Air Act for as long as the area does not monitor any violations of the 1997 8-hour ozone standard. If a violation of the 1997 ozone NAAQS is monitored in the Boston-Manchester-Portsmouth (SE), New Hampshire 8-hour ozone nonattainment area, this determination shall no longer apply. In addition, this area met its June 15, 2010 attainment deadline for the 1997 ozone standard.