§61.222. Standard.
40 C.F.R. § 61.222
Radon-222 emissions to the ambient air from uranium mill tailings pile that are no longer operational shall not exceed 20 pCi/(m 2-sec) (1.9 pCi/(ft 2-sec)) of radon-222.
Once a uranium mill tailings pile or impoundment ceases to be operational it must be disposed of and brought into compliance with this standard within two years of the effective date of the standard. If it is not physically possible for an owner or operator to complete disposal within that time, EPA shall, after consultation with the owner or operator, establish a compliance agreement which will assure that disposal will be completed as quickly as possible.
Notes, amendments, and revision history
Amendments
[54 FR 51702, Dec. 15, 1989, as amended at 59 FR 36301, July 15, 1994; 65 FR 62158, Oct. 17, 2000]
Source
Source: 54 FR 51702, Dec. 15, 1989, unless otherwise noted.
Authority
Authority: 42 U.S.C. 7401 et seq.
Source
Source: 38 FR 8826, Apr. 6, 1973, unless otherwise noted.
Amendments
[54 FR 51702, Dec. 15, 1989, as amended at 59 FR 36301, July 15, 1994; 65 FR 62158, Oct. 17, 2000]