costs for any treatment facilities necessary to meet Federal and State environmental requirements. (2) Calculation The calculation of the amount under paragraph (1) shall take into account the maximum estimated cost of reclamation, as determined by the best available science, and administrative costs associated with a government agency reclaiming the site. (c) Duration The financial assurance required under this section shall be held for the duration of the mineral activities and for an additional period sufficient to cover the responsibility of the operator for reclamation, long-term maintenance, and effluent treatment as specified in subsection (g). (d) Adjustments (1) In general The Secretary concerned may adjust the amount of the financial assurance required under this section and the terms of the acceptance of the financial assurance as needed as the land subject to the relevant permit is increased or decreased, the costs of reclamation or treatment change, or pursuant to section 304(f), but the financial assurance shall otherwise be in compliance with this section. (2) Review The Secretary concerned shall review the financial assurance every 3 years and as part of the permit application review under section 304(g). (e) Release The Secretary concerned may, upon request, after consultation with the Administrator of the Environmental Protection Agency, notice and opportunity for public comment, and inspection by the Secretary concerned, release, in whole or in part, the financial assurance required under this section if the Secretary concerned makes both of the following determinations: (1) Reclamation or restoration covered by the financial assurance has been accomplished as required by this Act. (2) The terms and conditions of any other applicable Federal requirements, and State requirements applicable pursuant to cooperative agreements under section 308, have been fulfilled. (f) Release schedule The release referred to in subsection (e) shall be according to the following schedule: (1) After the operator