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Pub. L. 102-579, 106 Stat. 4777, as amended by Pub. L. 104-201,110 Stat. 2422; Reorganization Plan No. 3 of 1970, 35 FR 15623, Oct. 6, 1970, 5 U.S.C. app. 1; Atomic Energy Act of 1954, as amended, 42 U.S.C. 2011-2296 and 10101-10270.
61 FR 5235, Feb. 9, 1996, unless otherwise noted.
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Subscribe to: 40 CFR Part 194 Subpart C - Individual and Ground-water Protection Requirements
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Compliance assessments that analyze compliance with § 191.15 of this chapter shall assume that an individual resides at the single geographic point on the surface of the accessible environment where that individual would be expected to receive the highest dose from radionuclide releases from the disposal system.
In compliance assessments that analyze compliance with § 191.15 of this chapter, all potential exposure pathways from the disposal system to individuals shall be considered. Compliance assessments with part 191, subpart C and § 191.15 of this chapter shall assume that individuals consume 2 liters per day of drinking water from any underground source of drinking water in the accessible environment.
In compliance assessments that analyze compliance with part 191, subpart C of this chapter, all underground sources of drinking water in the accessible environment that are expected to be affected by the disposal system over the regulatory time frame shall be considered. In determining whether underground sources of drinking water are expected to be affected by the disposal system, underground interconnections among bodies of surface water, ground water, and underground sources of drinking water shall be considered.
(a) Any compliance application shall contain compliance assessments required pursuant to this part. Compliance assessments shall include information which:
(1) Identifies potential processes, events, or sequences of processes and events that may occur over the regulatory time frame;
(2) Identifies the processes, events, or sequences of processes and events included in compliance assessment results provided in any compliance application; and
(3) Documents why any processes, events, or sequences of processes and events identified pursuant to paragraph (a)(1) of this section were not included in compliance assessment results provided in any compliance application.
(b) Compliance assessments of undisturbed performance shall include the effects on the disposal system of:
(1) Existing boreholes in the vicinity of the disposal system, with attention to the pathways they provide for migration of radionuclides from the site; and
(2) Any activities that occur in the vicinity of the disposal system prior to or soon after disposal. Such activities shall include, but shall not be limited to: Existing boreholes and the development of any existing leases that can be reasonably expected to be developed in the near future, including boreholes and leases that may be used for fluid injection activities.
(a) Compliance assessments shall consider and document uncertainty in the performance of the disposal system.
(b) Probability distributions for uncertain disposal system parameter values used in compliance assessments shall be developed and documented in any compliance application.
(c) Computational techniques which draw random samples from across the entire range of values of each probability distribution developed pursuant to paragraph (b) of this section shall be used to generate a range of:
(1) Estimated committed effective doses received from all pathways pursuant to § 194.51 and § 194.52;
(2) Estimated radionuclide concentrations in USDWs pursuant to § 194.53; and
(d) The number of estimates generated pursuant to paragraph (c) of this section shall be large enough such that the maximum estimates of doses and concentrations generated exceed the 99th percentile of the population of estimates with at least a 0.95 probability.
(e) Any compliance application shall display:
(1) The full range of estimated radiation doses; and
(2) The full range of estimated radionuclide concentrations.
(f) Any compliance application shall document that there is at least a 95 percent level of statistical confidence that the mean and the median of the range of estimated radiation doses and the range of estimated radionuclide concentrations meet the requirements of § 191.15 and part 191, subpart C of this chapter, respectively.