SUPPLEMENTARY INFORMATION:

Supporting documents, which explain in detail the information that the EPA will be collecting, are available in the public docket for this ICR. The docket can be viewed online at www.regulations.gov or in person at the EPA Docket Center, WJC West, Room 3334, 1301 Constitution Ave. NW, Washington, DC. The telephone number for the Docket Center is 202-566-1744. For additional information about EPA's public docket, visit http://www.epa.gov/​dockets.

Abstract: On December 15, 1989, pursuant to Section 112 of the Clean Air Act as amended in 1977 (42 U.S.C. 1857), the Environmental Protection Agency (EPA) promulgated National Emission Standards for Hazardous Air Pollutants (NESHAP) to control radionuclide emissions from several source categories. The regulations are codified at 40 CFR part 61. Of the seven subparts (B, H, I, K, R, T and W) included in the 1989 rule, as currently amended, four apply to privately operated facilities. In addition to requiring operational practices that limit emissions, Subparts B, K, R, and W impose radionuclide dose and/or emission limits, respectively, to underground uranium mines, elemental phosphorous plants, phosphogypsum stacks, and uranium mill tailings impoundments. Facilities must measure their radionuclide emissions, perform analysis or calculations per EPA procedure, and report the results to the EPA.

Information collected is used by the EPA to ensure that public health continues to be protected from the hazards of airborne radionuclides by compliance with these standards. Compliance is demonstrated through emissions testing and dose calculation when appropriate.

Form Numbers: None.

Respondents/affected entities: The North American Industry Classification System (NAICS) codes of facilities associated with the activity of the respondents are: (1) Elemental Phosphorous—325180, (2) Phosphogypsum Stacks—212392, (3) Underground Uranium Mines—212291, and (4) Uranium Mill Tailings—212291.

Respondent's obligation to respond: Mandatory (CAA, Sec, 112; 40 CFR part 61).

Estimated number of respondents: 17 (total).

Frequency of response: Annual, or one-time depending on the source category and respondent activity.

Total estimated burden: 1,880 hours (per year). Burden is defined at 5 CFR 1320.03(b).

Total estimated cost: $447,850 (per year), includes $328,000 annualized capital or operation & maintenance costs.

Changes in the Estimates: There is decrease of 1,898 hours in the total estimated respondent burden compared with the ICR currently approved by OMB. This decrease is due to a combination of factors. Fewer facilities, particularly uranium mines, are currently active. The only operating elemental phosphorus plant has obtained a waiver from annual testing and reporting. Compared to previous estimates, the current calculation assumes that fewer phosphogypsum stacks will require radon tests in any given year. The current assumption represents an upper bound on costs due to radon testing and reporting, compared to the actual observed activities of these facilities.

84 FR 10498