[Code of Federal Regulations]
[Title 40, Volume 22]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR192.11]

[Page 21-22]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 192--HEALTH AND ENVIRONMENTAL PROTECTION STANDARDS FOR URANIUM AND THORIUM 
MILL TAILINGS--Table of Contents
 
Subpart B--Standards for Cleanup of Land and Buildings Contaminated with 
  Residual Radioactive Materials from Inactive Uranium Processing Sites
 
Sec. 192.11  Definitions.

    (a) Unless otherwise indicated in this subpart, all terms shall have 
the same meaning as defined in subpart A.
    (b) Land means any surface or subsurface land that is not part of a 
disposal site and is not covered by an occupiable building.
    (c) Working Level (WL) means any combination of short-lived radon 
decay products in one liter of air that will result in the ultimate 
emission of alpha particles with a total energy of 130 billion electron 
volts.
    (d) Soil means all unconsolidated materials normally found on or 
near the surface of the earth including, but not limited to, silts, 
clays, sands, gravel, and small rocks.
    (e) Limited use groundwater means groundwater that is not a current 
or potential source of drinking water because (1) the concentration of 
total dissolved solids is in excess of 10,000 mg/l,

[[Page 22]]

or (2) widespread, ambient contamination not due to activities involving 
residual radioactive materials from a designated processing site exists 
that cannot be cleaned up using treatment methods reasonably employed in 
public water systems, or (3) the quantity of water reasonably available 
for sustained continuous use is less than 150 gallons per day. The 
parameters for determining the quantity of water reasonably available 
shall be determined by the Secretary with the concurrence of the 
Commission.

[48 FR 602, Jan. 5, 1983, as amended at 60 FR 2866, Jan. 11, 1995]