[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: 40CFR61.191]

[Page 145]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 61_NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS
--Table of Contents
 
     Subpart Q_National Emission Standards for Radon Emissions From 
                     Department of Energy Facilities
 
Sec. 61.191  Definitions.

    As used in this subpart, all terms not defined here have the meaning 
given them in the Clean Air Act or subpart A of part 61. The following 
terms shall have the following specific meanings:
    (a) Facility means all buildings, structures and operations on one 
contiguous site.
    (b) Source means any building, structure, pile, impoundment or area 
used for interim storage or disposal that is or contains waste material 
containing radium in sufficient concentration to emit radon-222 in 
excess of this standard prior to remedial action.