[Code of Federal Regulations]
[Title 40, Volume 17, Parts 199 to 259]
[Revised as of July 1, 2000]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR192.04]

[Page 20-21]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
                           AGENCY (CONTINUED)
 
PART 192--HEALTH AND ENVIRONMENTAL PROTECTION STANDARDS FOR URANIUM AND THORIUM MILL TAILINGS--Table of Contents
 
 Subpart A--Standards for the Control of Residual Radioactive Materials 
                 from Inactive Uranium Processing Sites
 
Sec. 192.04  Corrective action.

    If the groundwater concentration limits established for disposal 
sites under provisions of Sec. 192.02(c) are found or projected to be 
exceeded, a corrective action program shall be placed into operation as 
soon as is practicable, and in no event later than eighteen (18) months 
after a finding of exceedance. This corrective action program will 
restore the performance of the system of disposal to the original 
concentration limits established under

[[Page 21]]

Sec. 192.02(c)(3), to the extent reasonably achievable, and, in any 
case, as a minimum shall:
    (a) Conform with the groundwater provisions of Sec. 192.02(c)(3), 
and
    (b) Clean up groundwater in conformance with subpart B, modified as 
appropriate to apply to the disposal site.

[60 FR 2866, Jan. 11, 1995]

     Table 1 to Subpart A--Maximum Concentration of Constituents for
                         Groundwater Protection
------------------------------------------------------------------------
      Constituent concentration \1\                   Maximum
------------------------------------------------------------------------
Arsenic.................................  0.05
Barium..................................  1.0
Cadmium.................................  0.01
Chromium................................  0.05
Lead....................................  0.05
Mercury.................................  0.002
Selenium................................  0.01
Silver..................................  0.05
Nitrate (as N)..........................  10.
Molybdenum..............................  0.1
Combined radium-226 and radium-228......  5 pCi/liter
Combined uranium-234 and uranium-238 \2\  30 pCi/liter
Gross alpha-particle activity (excluding  15 pCi/liter
 radon and uranium).
Endrin (1,2,3,4,10,10-hexachloro-6,7-     0.0002
 exposy-1,4,4a,5,6,7,8,8a-octahydro-1,4-
 endo,endo-5,8-dimethanonaphthalene).
Lindane (1,2,3,4,5,6-                     0.004
 hexachlorocyclohexane, gamma insomer).
Methoxychlor (1,1,1-trichloro-2,2'-bis(p- 0.1
 methoxyphenylethane)).
Toxaphene (C<INF>10</INF> H<INF>10</INF> Cl<INF>6</INF>, technical         0.005
 chlorinated camphene, 67-69 percent
 chlorine).
2,4-D (2,4-dichlorophenoxyacetic acid)..  0.1
2,4,5-TP Silvex (2,4,5-                   0.01
 trichlorophenoxypropionic acid).
------------------------------------------------------------------------
\1\ Milligrams per liter, unless stated otherwise.
\2\ Where secular equilibrium obtains, this criterion will be satisfied
  by a concentration of 0.044 milligrams per liter (0.044 mg/l). For
  conditions of other than secular equilibrium, a corresponding value
  may be derived and applied, based on the measured site-specific ratio
  of the two isotopes of uranium.


[60 FR 2866, Jan. 11, 1995]