[Code of Federal Regulations]
[Title 40, Volume 5]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR53.2]

[Page 8]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 53--AMBIENT AIR MONITORING REFERENCE AND EQUIVALENT METHODS--Table of Contents
 
                      Subpart A--General Provisions
 
Sec. 53.2   General requirements for a reference method determination.

    The following general requirements for a reference method 
determination are summarized in table A-1 of this subpart.
    (a) Manual methods. (1) For measuring sulfur dioxide 
(SO2) and lead, Appendices A and G of part 50 of this chapter 
specify unique manual reference methods for those pollutants. Except as 
provided in Sec. 53.16, other manual methods for SO2 and lead 
will not be considered for reference method determinations under this 
part.
    (2) A reference method for measuring PM10 must be a 
manual method that meets all requirements specified in appendix J of 
part 50 of this chapter and must include a PM10 sampler that 
has been shown in accordance with this part to meet all requirements 
specified in subparts A and D of this part.
    (3) A reference method for measuring PM2.5 must be a 
manual method that meets all requirements specified in appendix L of 
part 50 of this chapter and must include a PM2.5 sampler that 
has been shown in accordance with this part to meet the applicable 
requirements specified in subparts A and E of this part. Further, 
reference method samplers must be manufactured in an ISO 9001-registered 
facility, as defined in Sec. 53.1 and as set forth in Sec. 53.51, and 
the Product Manufacturing Checklist set forth in subpart E of this part 
must be completed by an ISO-certified auditor, as defined in Sec. 53.1, 
and submitted to EPA annually to retain a PM2.5 reference 
method designation.
    (b) Automated methods. An automated reference method for measuring 
carbon monoxide (CO), ozone (O3), and nitrogen dioxide 
(NO2) must utilize the measurement principle and calibration 
procedure specified in the appropriate appendix to part 50 of this 
chapter and must have been shown in accordance with this part to meet 
the requirements specified in subpart B of this part.