[Code of Federal Regulations]
[Title 40, Volume 18]
[Revised as of July 1, 2003]
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]