# 40 C.F.R. § 61.222 (2026): Standard

> Federal · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/CFR_T40_P61_S61_222

## Section

- **Citation:** 40 C.F.R. § 61.222 (2026)
- **Heading:** Standard
- **Jurisdiction:** Federal
- **Kind:** Regulations
- **Status:** In force
- **Text as of:** August 14, 2026
- **Source:** Compiled text
- **Location:** Title 40 CFR: Protection of Environment / Chapter I / Part 61 / Subpart T / § 61.222: § 61.222   Standard.

## Text

(a) 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. (b) 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. [54 FR 51702, Dec. 15, 1989, as amended at 59 FR 36301, July 15, 1994; 65 FR 62158, Oct. 17, 2000]

## Nearby sections

- [40 C.F.R. § 61.220 (2026) § 61.220   Designation of facilities.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P61_S61_220.md)
- [40 C.F.R. § 61.221 (2026) § 61.221   Definitions.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P61_S61_221.md)
- [40 C.F.R. § 61.222 (2026) § 61.222   Standard.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P61_S61_222.md)
- [40 C.F.R. § 61.223 (2026) § 61.223   Compliance procedures.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P61_S61_223.md)
- [40 C.F.R. § 61.224 (2026) § 61.224   Recordkeeping requirements.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P61_S61_224.md)
- [40 C.F.R. § 61.225 (2026) § 61.225   Exemption from the reporting and testing requirements of 40 CFR 61.10.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P61_S61_225.md)
- [40 C.F.R. § 61.226 (2026) § 61.226   Reconsideration of rescission and reinstatement of this subpart.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P61_S61_226.md)

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/CFR_T40_P61_S61_222. Check the current official text before relying on it. Not legal advice.