A disposal site shall be tectonically stable to meet the performance objectives in Subchapter A (relating to general provisions). An area shall be avoided where tectonic processes such as faulting, folding or seismic activity may occur with a frequency and to an extent which may affect the isolation of waste and the long term stability of the site.
25 Pa. Code § 236.146
This section cited in 25 Pa. Code § 236.101 (relating to scope and applicability); 25 Pa. Code § 236.104 (relating to siting process); and 25 Pa. Code § 236.141 (relating to general requirements).