under subsection (a), including survey costs, costs for environmental documentation, and any other administrative costs related to the conveyance. If amounts are collected from the District of Columbia in advance of the Secretary incurring the actual costs, and the amount collected exceeds the costs actually incurred by the Secretary to carry out the conveyance, the Secretary shall refund the excess amount to the District of Columbia. (2) Treatment of amounts received Amounts received as reimbursement under paragraph (1) shall be credited to the fund or account that was used to cover those costs incurred by the Secretary in carrying out the conveyance. Amounts so credited shall be merged with amounts in such fund or account, and shall be available for the same purposes, and subject to the same conditions and limitations, as amounts in such fund or account. (e) Description of property The exact acreage and legal description of the property to be exchanged under this section shall be determined by surveys satisfactory to the Secretary of the Interior. (f) Rules of construction Nothing in this section may be construed— (1) to affect any obligations of the Secretary of the Interior with respect to the Robert F. Kennedy Memorial Stadium Campus under the National Environmental Policy Act of 1969 ( 42 U.S.C. 4321 et seq.) or the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 ( 42 U.S.C. 9601 et seq.)