[Code of Federal Regulations]
[Title 40, Volume 31]
[Revised as of July 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR1065.265]

[Page 709]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 1065_ENGINE-TESTING PROCEDURES--Table of Contents
 
                    Subpart C_Measurement Instruments
 
Sec.  1065.265  Nonmethane cutter.

    (a) Application. You may use a nonmethane cutter to measure 
CH4 with a FID analyzer. A nonmethane cutter oxidizes all 
nonmethane hydrocarbons to CO2 and H2O. You may 
use a nonmethane cutter for raw or diluted exhaust for batch or 
continuous sampling.
    (b) System performance. Determine nonmethane-cutter performance as 
described in Sec.  1065.365 and use the results to calculate NMHC 
emission in Sec.  1065.660.
    (c) Configuration. Configure the nonmethane cutter with a bypass 
line for the verification described in Sec.  1065.365.
    (d) Optimization. You may optimize a nonmethane cutter to maximize 
the penetration of CH4 and the oxidation of all other 
hydrocarbons. You may humidify a sample and you may dilute a sample with 
purified air or oxygen (O2) upstream of the nonmethane cutter 
to optimize its performance. You must account for any sample 
humidification and dilution in emission calculations.