; and (B) shall not perform any preliminary borings or excavations at the site unless necessary to determine the suitability of the site and authorized by the landowner. (4) Determination of suitability The Administrator shall determine whether a site is suitable for site characterization based on an environmental assessment of the site, which shall include— (A) an evaluation by the Administrator of whether the site is suitable for development as a repository under the guidelines established under subsection (a), including a safety case that provides the basis for confidence in the safety of the proposed nuclear waste facility at the proposed site; (B) an evaluation by the Administrator of the effects of site characterization activities on public health and safety and the environment; (C) a reasonable comparative evaluation of the proposed site and other proposed sites; (D) a description of the decision process by which the site was recommended; (E) an assessment of the regional and local impacts of locating a repository at the site, including the extent to which nuclear wastes are, or are planned to be, stored or disposed of within the State; and (F) potential conflicts with— (i) a compliance agreement requiring removal of nuclear waste from a site