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Title 40: Protection of Environment
CHAPTER I: ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
SUBCHAPTER C: AIR PROGRAMS (CONTINUED)
PART 61: NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS
Subpart R: National Emission Standards for Radon Emissions From Phosphogypsum Stacks
61.204 - Distribution and use of phosphogypsum for outdoor agricultural purposes.
Phosphogypsum may be lawfully removed from a stack and distributed in commerce for use in outdoor agricultural research and development and agricultural field use if each of the following requirements is satisfied:
(a) The owner or operator of the stack from which the phosphogypsum is removed shall determine annually the average radium-226 concentration at the location in the stack from which the phosphogypsum will be removed, as provided by ? 61.207.
(b) The average radium-226 concentration at the location in the stack from which the phosphogypsum will be removed, as determined pursuant to ? 61.207, shall not exceed 10 pCi/g (4500 pCi/lb).
(c) All phosphogypsum distributed in commerce for use pursuant to this section by the owner or operator of a phosphogypsum stack shall be accompanied by a certification document which conforms to the requirements of ? 61.208(a).
(d) Each distributor, retailer, or reseller who distributes phosphogypsum for use pursuant to this section shall prepare certification documents which conform to the requirements of ? 61.208(b).
(e) Use of phosphogypsum for indoor research and development in a laboratory must comply with ? 61.205.
[57 FR 23317, June 3, 1992, as amended at 64 FR 5579, Feb. 3, 1999; 65 FR 62158, Oct. 17, 2000]
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