[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: 40CFR61.25]

[Page 41]
 
                   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. 61.25  Recordkeeping requirements.

    The owner or operator of a mine must maintain records documenting 
the source of input parameters including the results of all measurements 
upon which they are based, the calculations and/or analytical methods 
used to derive values for input parameters, and the procedure used to 
determine compliance. In addition, the documentation should be 
sufficient to allow an independent auditor to verify the accuracy of the 
determination made concerning the facility's compliance with the 
standard. These records must be kept at the mine or by the owner or 
operator for at least five years and upon request be made available for 
inspection by the Administrator, or his authorized representative.