10 CFR § 960.4-2-6 - Dissolution.

---
identifier: "/us/cfr/t10/s960.4-2-6"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "10 CFR § 960.4-2-6 - Dissolution."
title_number: 10
title_name: "Energy"
section_number: "960.4-2-6"
section_name: "Dissolution."
chapter_name: "DEPARTMENT OF ENERGY"
part_number: "960"
part_name: "GENERAL GUIDELINES FOR THE PRELIMINARY SCREENING OF POTENTIAL SITES FOR A NUCLEAR WASTE REPOSITORY"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 2011  42 U.S.C. 7101  42 U.S.C. 10101"
regulatory_source: "49 FR 47752, Dec. 6, 1984, unless otherwise noted."
cfr_part: "960"
---


# 960.4-2-6 Dissolution.

(a) *Qualifying condition.* The site shall be located such that any subsurface rock dissolution will not be likely to lead to radionuclide releases greater than those allowable under the requirements specified in § 960.4-1. In predicting the likelihood of dissolution within the geologic setting at a site, the DOE will consider the evidence of dissolution within that setting during the Quaternary Period, including the locations and characteristics of dissolution fronts or other dissolution features, if identified.

(b) *Favorable condition.* No evidence that the host rock within the site was subject to significant dissolution during the Quaternary Period.

(c) *Potentially adverse condition.* Evidence of dissolution within the geologic setting—such as breccia pipes, dissolution cavities, significant volumetric reduction of the host rock or surrounding strata, or any structural collapse—such that a hydraulic interconnection leading to a loss of waste isolation could occur.

(d) *Disqualifying condition.* The site shall be *disqualified* if it is likely that, during the first 10,000 years after closure, active dissolution, as predicted on the basis of the geologic record, would result in a loss of waste isolation.