This chapter shall not apply to any property or premises where items are enclosed in a building or to any property or premises lawfully operated as business where the same is a part of an enterprise necessary to the operation of said business; provided, however, in the case of businesses whose inventory consists of the materials otherwise herein defined as junk or normally considered junk, the property upon which such items are placed shall be enclosed by a fence at least six feet (6') in height and of such a material that such fence shall reasonably prevent persons outside the premises from seeing the materials stored on the premises through the fence. However, nothing herein contained condones conditions which are otherwise a public or private nuisance. (Ord. 335, 7-10-1991)