All of the uses in sections 12-292 through 12-294 of this article shall be screened by opaque walls, fencing or planting of not less than six feet (6') in height when abutting an R district. For the purposes of this chapter abutting shall include those dwellings across an alley. If the commercial structure is within one hundred feet (100') of a residential structure, regardless of zoning district, an opaque fence of not less than six feet (6') in height shall be constructed. Uses permitted on review in sections 12-292 through 12-294 of this article shall meet the screening requirements of subsections 12-301B and C of this article. No article or material shall be stored to a height in excess of five feet (5'). (Ord. 1990-9, 6-7-1990)