[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: 40CFR1048.410]



[Page 576]

 

                   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 E_Testing In-use Engines

 

Sec.  1048.410  How must I select, prepare, and test my in-use engines?



    (a) You may make arrangements to select representative test engines 

from your own fleet or from other independent sources.

    (b) For the selected engine families, select engines that you or 

your customers have--

    (1) Operated for at least 50 percent of the engine family's useful 

life (see Sec.  1048.101(d));

    (2) Not maintained or used in an abnormal way; and

    (3) Documented in terms of total hours of operation, maintenance, 

operating conditions, and storage.

    (c) Use the following methods to determine the number of engines you 

must test in each engine family:

    (1) Test at least two engines if you produce 2,000 or fewer engines 

in the model year from all engine families, or if you produce 500 or 

fewer engines from the selected engine family. Otherwise, test at least 

four engines.

    (2) If you successfully complete an in-use test program on an engine 

family and later certify an equivalent engine family with carryover 

emission data, as described in Sec.  1048.235(c), then test at least one 

engine instead of the testing rates in paragraph (c)(1) of this section.

    (3) If you test the minimum required number of engines and all 

comply fully with emission standards, you may stop testing.

    (4) For each engine that fails any applicable standard, test two 

more. Regardless of measured emission levels, you do not have to test 

more than ten engines in an engine family. You may do more tests than we 

require.

    (5) You may concede that the engine family does not comply before 

testing a total of ten engines.

    (d) You may do minimal maintenance to set components of a test 

engine to specifications for anything we do not consider an adjustable 

parameter (see Sec.  1048.205(p)). Limit maintenance to what is in the 

owner's instructions for engines with that amount of service and age. 

Document all maintenance and adjustments.

    (e) Do at least one valid exhaust emission test for each test 

engine.

    (f) For a test program on an engine family, choose one of the 

following methods to test your engines:

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

applicable steady-state and transient procedures in subpart F of this 

part to show compliance with the duty-cycle standards in Sec.  

1048.101(a) and (b). We may direct you to measure emissions on the 

dynamometer using the supplemental test procedures in Sec.  1048.515 to 

show compliance with the field-testing standards in Sec.  1048.101(c).

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

equipment. Use the field testing procedures in subpart F of this part. 

Measure emissions during normal operation of the equipment to show 

compliance with the field-testing standards in Sec.  1048.101(c). We may 

direct you to include specific areas of normal operation.

    (g) You may ask us to waive parts of the prescribed test procedures 

if they are not necessary to determine in-use compliance.

    (h) Calculate the average emission levels for an engine family from 

the results for the set of tested engines. Round them to the number of 

decimal places in the emission standards expressed to one more decimal 

place.