§61.202. Standard.
40 C.F.R. § 61.202
Each person who generates phosphogypsum shall place all phosphogypsum in stacks. Phosphogypsum may be removed from a phosphogypsum stack only as expressly provided by this subpart. After a phosphogypsum stack has become an inactive stack, the owner or operator shall assure that the stack does not emit more than 20 pCi/(m 2-sec) (1.9 pCi/(ft 2-sec)) of radon-222 into the air.
Notes, amendments, and revision history
Amendments
[57 FR 23317, June 3, 1992, as amended at 65 FR 62158, Oct. 17, 2000]
Source
Source: 57 FR 23317, June 3, 1992, unless otherwise noted.
Authority
Authority: 42 U.S.C. 7401 et seq.
Source
Source: 38 FR 8826, Apr. 6, 1973, unless otherwise noted.
Amendments
[57 FR 23317, June 3, 1992, as amended at 65 FR 62158, Oct. 17, 2000]