A permanent enclosure for temporary storage of garbage, refuse and other waste materials shall be provided for every use other than single-family dwellings in every zoning district, except where an approved mechanically-loaded steel bin is used for the purpose or where a property is entirely surrounded by screen walls or buildings. Trash enclosures shall be constructed so that contents are not visible from a height of five feet (5') above grade on any abutting street or property. (Ord. 91-9, 6-4-1991)