[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: 40CFR1065.267]

[Page 709-710]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 1065_ENGINE-TESTING PROCEDURES--Table of Contents
 
                    Subpart C_Measurement Instruments
 
Sec.  1065.267  Gas chromatograph.

    (a) Application. You may use a gas chromatograph to measure 
CH4 concentrations of diluted exhaust for batch sampling. 
While you may also use a nonmethane cutter to measure

[[Page 710]]

CH4, as described in Sec.  1065.265, use a reference 
procedure based on a gas chromatograph for comparison with any proposed 
alternate measurement procedure under Sec.  1065.10.
    (b) Component requirements. We recommend that you use a gas 
chromatograph that meets the specifications in Table 1 of Sec.  
1065.205, and it must also meet the linearity verification in Sec.  
1065.307.

                       NOX Measurements