Treasury OIG should determine the feasibility of performing additional testing over portions of the remaining untested grant balance. If DC is unable to provide support Treasury OIG should recoup the funds or request that DC management provide support for replacement expenses, not previously charged, that were eligible during the CRF period of performance. Further, based on DC's responsiveness to Treasury OIG's requests and its ability to provide sufficient documentation, and/or replace unsupported transactions charged to CRF with valid expenditures, Treasury OIG should determine the feasibility of conducting an audit for Grants greater than or equal to $50,000 payment type.