All open property in the city which is used for the purpose of storing, processing or fabricating junk, farm chemical or other chemical products, petroleum products, building materials, farm, automotive or construction equipment or implements, or any substance, material or implement which by any statute or regulation is deemed to be inherently dangerous or extra hazardous shall be completely enclosed by a solid board, chain link or wire strand fence not less than five feet in height and otherwise designed and maintained to prevent the free access of the public.
(1994 Code, § 15.20.050)