Okla. Admin. Code § 460:20-27-12
(a) General. Each application shall include geologic information in sufficient detail to assist in determining:
(b) Geologic information shall include, at a minimum, the following:
(1) A description of the geology of the proposed permit and adjacent areas down to and including the deeper of either the stratum immediately below the lowest coal seam to be mined or any aquifer below the lowest coal seam to be mined which may be adversely impacted by mining. The description shall include the areal and structural geology of the permit and adjacent areas and other parameters which influence the required reclamation, and the occurrence, availability, movement, quantity, and quality of potentially impacted surface and ground waters. It shall be based on:
(2) Analyses of samples collected from test borings; drill cores; or fresh, unweathered, uncontaminated samples from rock outcrops from the permit area, down to and including the deeper of either the stratum immediately below the lowest coal seam to be mined or any aquifer below the lowest seam to be mined which may be adversely impacted by mining. The analyses shall result in the following: