Soil, in an amount sufficient to ensure ample material for vegetation, shall be removed, conserved and redistributed for the final surface layer. If soil is unavailable suitable mine spoil or other materials which will support vegetation shall be conserved and redistributed as the final surface.
25 Pa. Code § 88.86
This section cited in 25 Pa. Code § 88.87 (relating to vegetation-supporting material: available soil removal); 25 Pa. Code § 88.381 (relating to general requirements); and 25 Pa. Code § 88.493 (relating to minimum environmental protection performance standards).