In a preliminary departmental decision, the Secretary shall have the burden of establishing a prima facie case for the recovery of funds, including an analysis reflecting the value of the program services actually obtained in a determination of harm to the Federal interest. The facts to serve as the basis of the preliminary departmental decision may come from an audit report, an investigative report, a monitoring report, or other evidence. The amount of funds to be recovered shall be determined on the basis of
section 1234b of this title.