Original Standards for Tier 0, Tier 1 and Tier 2 Locomotives

(a) Locomotives were originally subject to Tier 0, Tier 1, and Tier 2 emission standards described in paragraph (b) of this appendix as follows: (1) The Tier 0 and Tier 1 standards in paragraph (b) of this appendix applied instead of the Tier 0 and Tier 1 standards of § 1033.101 for locomotives manufactured and remanufactured before January 1, 2010. For example, a locomotive that was originally manufactured in 2004 and remanufactured on April 10, 2011, was subject to the original Tier 1 standards specified in paragraph (b) of this appendix and became subject to the Tier 1 standards of § 1033.101 when it was remanufactured on April 10, 2011. (2) The Tier 2 standards in paragraph (b) of this appendix applied instead of the Tier 2 standards of § 1033.101 for locomotives manufactured and remanufactured before January 1, 2013. (b) The following NO X and PM standards applied before the dates specified in paragraph (a) of this appendix: Table 1 to Appendix A—Original Locomotive Emission Standards Type of standard Year of original manufacture Tier Standards (g/bhp-hr) NO X PM-primary PM-alternate a Line-haul 1973-1992 Tier 0 9.5 0.60 0.30 1993-2004 Tier 1 7.4 0.45 0.22 2005-2011 Tier 2 5.5 0.20 0.10 Switch 1973-1992 Tier 0 14.0 0.72 0.36 1993-2004 Tier 1 11.0 0.54 0.27 2005-2011 Tier 2 8.1 0.24 0.12 a Locomotives certified to the alternate PM standards are also subject to alternate CO standards of 10.0 for the line-haul cycle and 12.0 for the switch cycle. (c) The original Tier 0, Tier 1, and Tier 2 standards for HC and CO emissions and smoke are the same standards identified in § 1033.101. [88 FR 4486, Jan. 24, 2023]