{"data":{"id":"us/40-cfr-61.202","jurisdiction":"us","citation":"40 CFR 61.202","heading":"Standard.","body":"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.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 61—NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS","Subpart R—National Emission Standards for Radon Emissions From Phosphogypsum Stacks"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"e8884d88b9d70c0af8fb247b47a208d8903fba648cf86bca50627b3d4fc43cc4","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-61.201","next":"us/40-cfr-61.203"},"notice":"GroundRules: Original legal text. Not legal advice."}