; or (B) on authorization by the Secretary, be disposed of by the eligible entity through a sale, lease, or other conveyance, in accordance with subsection (e). (2) Exception The removal of sediment from a stormwater detention basin or the movement or removal of minerals on a parcel of Federal land conveyed under subsection (b) that may be interfering with or precluding any public purpose shall not result in the parcel being considered to be no longer used for a public purpose under paragraph (1). (3) Requirements for sale, lease, or other conveyance (A) Fair market value The sale, lease, or other conveyance of a parcel of Federal land by an eligible entity under paragraph (1)(B) shall be for fair market value. (B) Disposition of proceeds Any gross proceeds received by an eligible entity from the sale, lease, or other conveyance of a parcel of Federal land under such paragraph shall be deposited in the special account. (4) Responsibility for remediation If a parcel of Federal land reverts to the Secretary under paragraph (1)(A) and the Secretary determines that the Federal land is contaminated with hazardous waste, the eligible entity to which the Federal land was conveyed shall be responsible for remediation of the contamination of the parcel of Federal land. (e) Applicable law Any lease, patent, or real estate transaction for Federal land conveyed under subsection (b) is affirmed and validated as having been completed pursuant to, and in compliance with, the Act of June 14, 1926 (commonly known as the Recreation and Public Purposes Act ; 44 Stat. 741, chapter 578