[Code of Federal Regulations]
[Title 40, Volume 30]
[Revised as of July 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR1048.235]

[Page 558-559]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 1048_CONTROL OF EMISSIONS FROM NEW, LARGE NONROAD SPARK-IGNITION 
ENGINES--Table of Contents
 
                  Subpart C_Certifying Engine Families
 
Sec. 1048.235  What emission testing must I perform for my application 
for a certificate of conformity?

    This section describes the emission testing you must perform to show 
compliance with the emission standards in Sec. Sec. 1048.101(a) and (b) 
and 1048.105 during certification. See Sec. 1048.205(s) regarding

[[Page 559]]

emission testing related to the field-testing emission standards.
    (a) Test your emission-data engines using the procedures and 
equipment specified in subpart F of this part. For any testing related 
to evaporative emissions, use good engineering judgment to include a 
complete fuel system with the engine.
    (b) Select engine families according to the following criteria:
    (1) For exhaust testing, select from each engine family a test 
engine for each fuel type with a configuration that is most likely to 
exceed the exhaust emission standards, using good engineering judgment. 
Consider the emission levels of all exhaust constituents over the full 
useful life of the engine when operated in a piece of equipment.
    (2) For evaporative testing, select from each engine family a test 
fuel system for each fuel type with a configuration that is most likely 
to exceed the evaporative emission standards, using good engineering 
judgment.
    (c) You may use previously generated emission data in either of the 
following cases:
    (1) You may submit emission data for equivalent engine families from 
previous years instead of doing new tests, but only if the data show 
that the test engine would meet all the requirements for the latest 
engine models. We may require you to do new emission testing if we 
believe the latest engine models could be substantially different from 
the previously tested engine.
    (2) You may submit emission data for equivalent engine families 
performed to show compliance with other standards (such as California 
standards) instead of doing new tests, but only if the data show that 
the test engine would meet all of this part's requirements.
    (d) We may choose to measure emissions from any of your test engines 
(or other engines from the engine family).
    (1) If we do this, you must provide the test engine at the location 
we select. We may decide to do the testing at your plant or any other 
facility. If we choose to do the testing at your plant, you must 
schedule it as soon as possible and make available the instruments and 
equipment we need.
    (2) If we measure emissions on one of your test engines, the results 
of that testing become the official data for the engine. Unless we later 
invalidate this data, we may decide not to consider your data in 
determining if your engine family meets the emission standards.
    (3) Before we test one of your engines, we may set its adjustable 
parameters to any point within the physically adjustable ranges (see 
Sec. 1048.115(e)).
    (4) Calibrate the test engine within normal production tolerances 
for anything we do not consider an adjustable parameter (see Sec. 
1048.205(p)).