The natural ground surface shall be prepared by removing the vegetation and, if required
by the director, shall be notched by a series of terraces prior to the placement of
any fill. No fill shall be placed over any water, including wetlands and streams,
refuse dump, nor upon a soft, soggy or springy foundation; provided, that this requirement
may be waived by the director if the permittee submits an engineer's report substantiating
the permanence and safety of the fill.