It shall be unlawful for any person to dispose of, dump, deposit or leave any solid waste within the county, on public or private property, except at a solid waste acceptance facility approved under this chapter, provided that, with the written permission of the owner, clean fill may be deposited upon private property. (1981 L.M.C., ch. 37, § 1; 1985 L.M.C., ch. 31, § 28.)