[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: 40CFR1048.515]



[Page 581-582]

 

                   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.  1048.515  What are the field-testing procedures?



    (a) This section describes the procedures to determine whether your 

engines meet the field-testing emission standards in Sec.  1048.101(c). 

These procedures may include any normal engine operation and ambient 

conditions that the engines may experience in use. Paragraph (b) of this 

section defines the limits of what we will consider normal engine 

operation and ambient conditions. Use the test procedures we specify in 

Sec.  1048.501, except for the provisions we specify in this section. 

Measure emissions with one of the following procedures:

    (1) Remove the selected engines for testing in a laboratory. You may 

use an engine dynamometer to simulate normal operation, as described in 

this section.

    (2) Test the selected engines while they remain installed in the 

equipment. In 40 CFR part 1065, subpart J, we describe the equipment and 

sampling methods for testing engines in the field. Use fuel meeting the 

specifications of 40 CFR part 1065, subpart H, or a fuel typical of what 

you would expect the engine to use in service.

    (b) An engine's emissions may not exceed the levels we specify in 

Sec.  1048.101(c) for any continuous sampling period of at least 120 

seconds under the following ranges of operation and operating 

conditions:

    (1) Engine operation during the emission sampling period may include 

any normal operation, subject to the following restrictions:

    (i) Average power must be over 5 percent of maximum brake power.

    (ii) Continuous time at idle must not be greater than 120 seconds.

    (iii) The sampling period may not begin until the engine has reached 

stable operating temperatures. For example, this would exclude engine 

operation after starting until the thermostat starts modulating coolant 

temperature.

    (iv) The sampling period may not include engine starting.



[[Page 582]]



    (v) For engines that qualify for the alternate Tier 2 emission 

standards in Sec.  1048.101(d), operation at 90 percent or more of 

maximum power must be less than 10 percent of the total sampling time. 

You may request our approval for a different power threshold.

    (2) Engine testing may occur under any normal conditions without 

correcting measured emission levels, subject to the following 

restrictions:

    (i) Barometric pressure must be between 80.0 and 103.3 kPa (600 and 

775 mm Hg).

    (ii) Ambient air temperature must be between 13[deg] and 35 [deg]C.



[67 FR 68347, Nov. 8, 2002, as amended at 70 FR 40478, July 13, 2005]