40 CFR 61.252 - Standard.

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There are 3 Updates appearing in the Federal Register for 40 CFR 61. View below or at eCFR (GPOAccess)
§ 61.252 Standard.
(a) Radon-222 emissions to the ambient air from an existing uranium mill tailings pile shall not exceed 20 pCi/(m2-sec) (1.9 pCi/(ft2-sec)) of radon-222.
(b) After December 15, 1989, no new tailings impoundment can be built unless it is designed, constructed and operated to meet one of the two following work practices:
(1) Phased disposal in lined tailings impoundments that are no more than 40 acres in area and meet the requirements of 40 CFR 192.32(a) as determined by the Nuclear Regulatory Commission. The owner or operator shall have no more than two impoundments, including existing impoundments, in operation at any one time.
(2) Continuous disposal of tailings such that tailings are dewatered and immediately disposed with no more than 10 acres uncovered at any time and operated in accordance with § 192.32(a) as determined by the Nuclear Regulatory Commission.
(c) All mill owners or operators shall comply with the provisions of 40 CFR 192.32(a) in the operation of tailings piles, the exemption for existing piles in 40 CFR 192.32(a) notwithstanding.
[54 FR 51703, Dec. 15, 1989, as amended at 65 FR 62159, Oct. 17, 2000]

Title 40 published on 2013-07-01

The following are only the Rules published in the Federal Register after the published date of Title 40.

For a complete list of all Rules, Proposed Rules, and Notices view the Rulemaking tab.

  • 2014-02-27; vol. 79 # 39 - Thursday, February 27, 2014
    1. 79 FR 11228 - Revisions to Test Methods and Testing Regulations
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      Final rule.
      This final rule is effective on February 27, 2014. The incorporation by reference materials listed in the rule are approved by the Director of the Federal Register as of February 27, 2014.
      40 CFR Parts 51, 60, 61, and 63

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United States Code

Title 40 published on 2013-07-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 40 CFR 61 after this date.

  • 2014-07-21; vol. 79 # 139 - Monday, July 21, 2014
    1. 79 FR 42275 - Revisions to National Emission Standards for Radon Emissions From Operating Mill Tailings
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      Proposed rule; extension of comment period.
      Written comments on the proposed rule published on May 2, 2014 (79 FR 25388) must be received on or before October 29, 2014.
      40 CFR Part 61