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 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]
Sec. Table 1 to Subpart A of Part 192--Maximum Concentration of
Constituents for Groundwater Protection ------------------------------------------------------------------------
Constituent concentration \1\ Maximum------------------------------------------------------------------------Arsenic................................. 0.05Barium.................................. 1.0Cadmium................................. 0.01Chromium................................ 0.05Lead.................................... 0.05Mercury................................. 0.002Selenium................................ 0.01Silver.................................. 0.05Nitrate (as N).......................... 10.Molybdenum.............................. 0.1Combined radium-226 and radium-228...... 5 pCi/literCombined uranium-234 and uranium-238 \2\ 30 pCi/literGross 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 (C10 H10 Cl6, technical 0.005
chlorinated camphene, 67-69 percent
chlorine).2,4-D (2,4-dichlorophenoxyacetic acid).. 0.12,4,5-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] Subpart B_Standards for Cleanup of Land and Buildings Contaminated with
Residual Radioactive Materials from Inactive Uranium Processing Sites