[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: 40CFR61.255]

[Page 171]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 61_NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS
--Table of Contents
 
Subpart W_National Emission Standards for Radon Emissions From Operating 
                              Mill Tailings
 
Sec. 61.255  Recordkeeping requirements.

    The owner or operator of the mill 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 mill for at least five years 
and upon request be made available for inspection by the Administrator, 
or his authorized representative.