10 C.F.R. § 960.5-2-10 – Hydrology.

(a) Qualifying condition. The site shall be located such that the geohydrologic setting of the site will (1) be compatible with the activities required for repository construction, operation, and closure; (2) not compromise the intended functions of the shaft liners and seals; and (3) permit the requirements specified in § 960.5-1(a)(3) to be met.
(b) Favorable conditions.
1. (1) Absence of aquifers between the host rock and the land surface.
2. (2) Absence of surface-water systems that could potentially cause flooding of the repository.
3. (3) Availability of the water required for repository construction, operation, and closure.
(c) Potentially adverse condition. Ground-water conditions that could require complex engineering measures that are beyond reasonably available technology for repository construction, operation, and closure.
(d) Disqualifying condition. A site shall be disqualified if, based on expected ground-water conditions, it is likely that engineering measures that are beyond reasonably available technology will be required for exploratory-shaft construction or for repository construction, operation, or closure.