The best nontoxic and vegetation-supporting material, whenever available from the operation, shall be removed, conserved and redistributed for the final surface.
25 Pa. Code § 88.183
This section cited in 25 Pa. Code § 86.37 (relating to criteria for permit approval or denial); and 25 Pa. Code § 88.509 (relating to criteria and schedule for release of bonds on pollution abatement areas).