The amount paid for the additional portion of real property, or any part thereof, which exceeds the permissible conveyance limitation under subsection c. of this section shall be used exclusively for the purposes of remediating that parcel of real property in accordance with the provisions of subsection d. of this section; provided, however, if any portion of that amount shall remain unexpended for the remediation of the parcel, that unexpended amount shall be deposited in a remediation trust fund as provided in subsection g. of this section.
N.J.S. § 13:1K-11.8