All demolition material shall be wetted frequently with amended water. All waste and refuse shall be removed from work area and site and disposed of appropriately. Backfill shall be clean fill only, e.g., topsoil, sand and the like. Any foundation floor shall be removed or breached and any old foundation walls shall be removed within two feet of the finish grade. Finish surface elevation shall be seeded for grass coverage and there shall be no stormwater runoff.