§ 86.007-15 NOX and particulate averaging, trading, and banking for heavy-duty engines.

Section 86.007-15 includes text that specifies requirements that differ from § 86.004-15. Where a paragraph in § 86.004-15 is identical and applicable to § 86.007-15, this may be indicated by specifying the corresponding paragraph and the statement “[Reserved]. For guidance see § 86.004-15.”

(a)-(l) [Reserved]. For guidance see § 86.004-15.

(m) The following provisions apply for model year 2007 and later engines (including engines certified during years 2007-2009 under the phase-in provisions of § 86.007-11(g)(1), § 86.005-10(a), or § 86.008-10(f)(1)). These provisions apply instead of the provisions of paragraphs § 86.004-15 (a) through (k) to the extent that they are in conflict.

(1) Manufacturers of Otto-cycle engines may participate in an NMHC averaging, banking and trading program to show compliance with the standards specified in § 86.008-10. The generation and use of NMHC credits are subject to the same provisions in paragraphs § 86.004-15 (a) through (k) that apply for NO_X plus NMHC credits, except as otherwise specified in this section.

(2) Credits are calculated as NO_X or NMHC credits for engines certified to separate NO_X and NMHC standards. NO_X plus NMHC credits (including banked credits and credits that are generated during years 2007-2009 under the phase-in provisions of § 86.007-11(g)(1), § 86.005-10(a), or § 86.008-10(f)(1)) may be used to show compliance with 2007 or later NO_X standards (NO_X or NMHC standards for Otto-cycle engines), subject to an 0.8 discount factor (e.g., 100 grams of NO_X plus NMHC credits is equivalent to 80 grams of NO_X credits).