Applicability

Section 255 Section 255.120  Applicability a)         Conformity determinations for Federal actions related to transportation plans, programs, and projects developed, funded, or approved under Title 23 U.S.C. or the Federal Transit Act (49 U.S.C. 1601 et seq.) are not subject to the requirements of this Part. b)         For Federal actions not covered by subsection (a) of this Section and not exempt pursuant to Section 255.170 of this Part, a conformity determination is required for each pollutant where the total of direct and indirect emissions in a nonattainment or maintenance area caused by a Federal action would equal or exceed any of the rates in subsection (b)(1) or (b)(2) of this Section: 1)         Nonattainment Areas: Tons/Year Ozone (VOC's or NO x ): Serious NAA's 50 Severe NAA's 25 Extreme NAA's 10 Other ozone NAA's outside an ozone transport region 100 Marginal and moderate NAA's inside an ozone transport region: VOC 50 NO x 100 Carbon monoxide: All NAA's 100 SO 2 or NO 2 : All NAA's 100 PM-10: Moderate NAA's 100 Serious NAA's 70 Pb: All NAA's 25 2)         Maintenance Areas: Tons/Year Ozone (NO x ) SO 2 or NO 2 : All maintenance areas 100 Ozone (VOC's): Maintenance areas inside an ozone transport region 50 Maintenance areas outside an ozone transport region 100 Carbon monoxide: All maintenance areas 100 PM-10: All maintenance areas 100 Pb: All maintenance areas 25