[Code of Federal Regulations]
[Title 40, Volume 31]
[Revised as of July 1, 2006]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR1051.103]
[Page 615-617]
TITLE 40--PROTECTION OF ENVIRONMENT
CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
PART 1051_CONTROL OF EMISSIONS FROM RECREATIONAL ENGINES AND VEHICLES
--Table of Contents
Subpart B_Emission Standards and Related Requirements
Sec. 1051.103 What are the exhaust emission standards for snowmobiles?
(a) Apply the exhaust emission standards in this section by model
year. Measure emissions with the snowmobile test procedures in subpart F
of this part.
(1) Follow Table 1 of this section for exhaust emission standards.
You may generate or use emission credits under the averaging, banking,
and trading (ABT) program for HC+NOX and CO emissions, as
described in subpart H of this part. This requires that you specify a
family emission limit for each pollutant you include in the ABT program
for each engine family. These family emission limits serve as the
emission standards for the engine family with respect to all required
testing instead of the standards specified in this section. An engine
family meets emission standards even if its family emission limit is
higher than the standard, as long as you show that the whole averaging
set of applicable engine families meets the applicable emission
standards using emission credits, and the vehicles within the family
meet the family emission limit. The phase-in values specify the
percentage of your U.S.-directed production that must comply with the
emission standards for those model years. Calculate this compliance
percentage based on a simple count of your U.S.-directed production
units within each certified engine family compared with a simple count
of your total U.S.-directed production units.
[[Page 616]]
Table 1 also shows the maximum value you may specify for a family
emission limit, as follows:
Table 1 of Sec. 1051.103--Exhaust Emission Standards for Snowmobiles (g/kW-hr)
--------------------------------------------------------------------------------------------------------------------------------------------------------
Emission standards Maximum allowable family emission
Phase-in --------------------------------- limits
Phase Model year (percent) ----------------------------------
HC HC+NOX CO HC HC+NOX CO
--------------------------------------------------------------------------------------------------------------------------------------------------------
Phase 1................................... 2006......................... 50 100 ......... 275 ......... ......... ...........
--------------------------------------------------------------------------------------------------------------------------------------------------------
Phase 1................................... 2007-2009.................... 100 100 ......... 275 ......... ......... ...........
--------------------------------------------------------------------------------------------------------------------------------------------------------
Phase 2................................... 2010 and 2011................ 100 75 ......... 275 ......... ......... ...........
--------------------------------------------------------------------------------------------------------------------------------------------------------
Phase 3................................... 2012 and later............... 100 75 (\1\) (\1\) 150 165 400
--------------------------------------------------------------------------------------------------------------------------------------------------------
\1\ See Sec. 1051.103(a)(2).
(2) For Phase 3, the HC+NOX and CO standards are defined
by a functional relationship. Choose your corporate average
HC+NOX and CO standards for each model year according to the
following criteria:
(i) Prior to production, select the HC+NOX standard and
CO standard (specified as g/kW-hr) so that the combined percent
reduction from baseline emission levels is greater than or equal to 100
percent; that is, that the standards comply with the following equation:
[GRAPHIC] [TIFF OMITTED] TR08NO02.007
(ii) Your corporate average HC+NOX standard may not be
higher than 90 g/kW-hr.
(iii) Your corporate average CO standard may not be higher than 275
g/kW-hr.
(iv) You may use the averaging and banking provisions of subpart H
of this part to show compliance with these HC+NOX and CO
standards in this paragraph (a)(2). You may modify your selection of the
HC+NOX and CO standards at the end of the model year under
paragraph (a)(2)(i) of this section. You must comply with these final
corporate average emission standards.
(b) The exhaust emission standards in this section apply for
snowmobiles using the fuel type on which they are designed to operate.
You must meet the numerical emission standards for hydrocarbons in this
section based on the following types of hydrocarbon emissions for
snowmobiles powered by the following fuels:
(1) Gasoline- and LPG-fueled snowmobiles: THC emissions.
(2) Natural gas-fueled snowmobiles: NMHC emissions.
(3) Alcohol-fueled snowmobiles: THCE emissions.
(c) Your snowmobiles must meet emission standards over their full
useful life. The minimum useful life is 8,000 kilometers, 400 hours of
engine operation, or five calendar years, whichever comes first. You
must specify a longer useful life in terms of kilometers and hours for
the engine family if the average service life of your vehicles is longer
than the minimum value, as follows:
(1) Except as allowed by paragraph (c)(2) of this section, your
useful life (in kilometers and hours) may not be less than either of the
following:
(i) Your projected operating life from advertisements or other
marketing materials for any vehicles in the engine family.
[[Page 617]]
(ii) Your basic mechanical warranty for any engines in the engine
family.
(2) Your useful life may be based on the average service life of
vehicles in the engine family if you show that the average service life
is less than the useful life required by paragraph (c)(1) of this
section, but more than the minimum useful life (8,000 kilometers or 400
hours of engine operation). In determining the actual average service
life of vehicles in an engine family, we will consider all available
information and analyses. Survey data is allowed but not required to
make this showing.
[67 FR 68347, Nov. 8, 2002, as amended at 70 FR 40487, July 13, 2005]