[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: 40CFR1048.501]
[Page 569]
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 F_Test Procedures
Sec. 1048.501 What procedures must I use to test my engines?
(a) Use the equipment and procedures for spark-ignition engines in
40 CFR part 1065 to show your engines meet the duty-cycle emission
standards in Sec. 1048.101(a) and (b). Measure HC, NOX, CO,
and CO2 emissions using the full-flow dilute sampling
procedures in 40 CFR part 1065. Use the applicable duty cycles in
Sec. Sec. 1048.505 and 1048.510.
(b) We describe in Sec. 1048.515 the supplemental procedures for
showing that your engines meet the field-testing emission standards in
Sec. 1048.101(c).
(c) Use the fuels specified in 40 CFR part 1065, subpart C, for all
the testing we require in this part, except as noted in Sec. 1048.515.
Use these test fuels or any commercially available fuel for service
accumulation.
(d) To test engines for evaporative emissions, use the equipment and
procedures specified for testing diurnal emissions in 40 CFR 86.107-96
and 86.133-96 with fuel meeting the specifications in 40 CFR part 1065,
subpart C. Measure emissions from a test engine with a complete fuel
system. Reported emission levels must be based on the highest emissions
from three successive 24-hour periods of cycling temperatures. Note that
you may not be required to test for evaporative emissions during
certification if you certify by design, as specified in Sec. 1048.245.
(e) You may use special or alternate procedures, as described in 40
CFR 1065.10.
(f) We may reject data you generate using alternate procedures if
later testing with the procedures in 40 CFR part 1065 shows
contradictory emission data.