[Code of Federal Regulations]

[Title 40, Volume 20]

[Revised as of July 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 40CFR89.113]



[Page 57]

 

                   TITLE 40--PROTECTION OF ENVIRONMENT

 

         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)

 

PART 89_CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD 

COMPRESSION-IGNITION ENGINES--Table of Contents

 

        Subpart B_Emission Standards and Certification Provisions

 

Sec.  89.113  Smoke emission standard.



    (a) Exhaust opacity from compression-ignition nonroad engines for 

which this subpart is applicable must not exceed:

    (1) 20 percent during the acceleration mode;

    (2) 15 percent during the lugging mode; and

    (3) 50 percent during the peaks in either the acceleration or 

lugging modes.

    (b) Opacity levels are to be measured and calculated as set forth in 

40 CFR part 86, subpart I. Notwithstanding the provisions of 40 CFR part 

86, subpart I, two-cylinder nonroad engines may be tested using an 

exhaust muffler that is representative of exhaust mufflers used with the 

engines in use.

    (c) The following engines are exempt from the requirements of this 

section:

    (1) Single-cylinder engines;

    (2) Propulsion marine diesel engines; and

    (3) Constant-speed engines.



[59 FR 31335, June 17, 1994. Redesignated and amended at 63 FR 56995, 

57003, Oct. 23, 1998]