[Code of Federal Regulations]
[Title 40, Volume 8]
[Revised as of July 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR61.23]

[Page 40]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 61_NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS
--Table of Contents
 
     Subpart B_National Emission Standards for Radon Emissions From 
                        Underground Uranium Mines
 
Sec. 61.23  Determining compliance.

    (a) Compliance with the emission standard in this subpart shall be 
determined and the effective dose equivalent calculated by the U.S. 
Environmental Protection Agency (EPA) computer code COMPLY-R. An 
underground uranium mine owner or operator shall calculate the source 
terms to be used for input into COMPLY-R by conducting testing in 
accordance with the procedures described in appendix B, Method 115, or
    (b) Owners or operators may demonstrate compliance with the emission 
standard in this subpart through the use of computer models that are 
equivalent to COMPLY-R provided that the model has received prior 
approval from EPA headquarters. EPA may approve a model in whole or in 
part and may limit its use to specific circumstances.

[54 FR 51694, Dec. 15, 1989, as amended at 65 FR 62151, Oct. 17, 2000]