[Code of Federal Regulations]
[Title 40, Volume 13]
[Revised as of January 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR65.62]

[Page 52-53]
 
                TITLE 40 - PROTECTION OF ENVIRONMENT
 
      CHAPTER I - ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 65 - CONSOLIDATED FEDERAL AIR RULE--Table of Contents
 
                     Subpart D - Process Vents
 
Sec. 65.62  Process vent group determination.

    (a) Group status. The owner or operator of a process vent shall 
determine the group status (i.e., Group 1, Group 2A, or Group 2B) for 
each process vent. Group 1 process vents require control, and Group 2A 
and 2B process vents do not. Group 2A process vents require parameter 
monitoring, and Group 2B process vents do not. The owner or operator 
shall report the group status of

[[Page 53]]

each process vent as specified in Sec. 65.5(c)(2).
    (b) Group 1. A process vent is considered Group 1 if it meets at 
least one of the following specifications:
    (1) The owner or operator designates the process vent as Group 1.
    (2) At representative operating conditions expected to yield the 
lowest TRE index value for the process vent, the TRE index value is less 
than or equal to 1.0, the flow rate is greater than or equal to 0.011 
standard cubic meter per minute (0.40 standard cubic foot per minute), 
and the concentration is greater than or equal to the applicable 
criterion in table 1 of this subpart. Procedures for determining the TRE 
index value, flow rate, and concentration are specified in 
Sec. 65.64.
    (c) Group 2A. A process vent is considered Group 2A if, at 
representative operating conditions expected to yield the lowest TRE 
index value, it has a TRE index value of greater than 1.0 and less than 
or equal to 4.0, a flow rate of greater than or equal to 0.011 standard 
cubic meter per minute (0.40 standard cubic foot per minute), and a 
concentration greater than or equal to the applicable table 1 criterion. 
Procedures for determining the TRE index value, flow rate, and 
concentration are specified in Sec. 65.64.
    (d) Group 2B. A process vent is considered Group 2B if, at 
representative operating conditions expected to yield the lowest TRE 
index value, it has a TRE index value of greater than 4.0; or a flow 
rate of less than 0.011 standard cubic meter per minute (0.40 standard 
cubic foot per minute); or a concentration less than the applicable 
criterion in table 1 of this subpart. Procedures for determining the TRE 
index value, flow rate, and concentration are specified in 
Sec. 65.64.