costs actually incurred by the Secretary to carry out the conveyance, the Secretary shall refund the excess amount to the Department. (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 or, if such fund or account has expired at the time of credit, to an appropriate appropriation, fund, or account currently available to the Secretary for the purposes for which the expenses were paid. 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 conveyed under subsection (a) shall be determined by a survey satisfactory to the Secretary. (f) Environmental concerns The United States Air Force shall retain liability for all environmental closure and reclamation obligations that exist as of the date of the conveyance under subsection (a). (g) Additional terms and considerations The Secretary may require such additional terms and conditions in connection with the conveyance under subsection (a) as the Secretary considers appropriate to protect the interests of the United States. 2824. Land exchange, Naval Industrial Ordnance Reserve Plant, Sunnyvale, California (a) Land exchange authorized The Secretary of the Navy ( Secretary ) may convey to an entity ( Exchange Entity ) all right, title, and interest of the United States in and to the parcel of real property, including improvements thereon, comprising the Naval Industrial Reserve Ordnance Plant (NIROP) located in Sunnyvale, California in exchange for property interests that meet the readiness requirements of the Department of the Navy, as determined by the Secretary. (b) Land exchange agreement Exchange of the real property identified in subsection (a) shall be