In any I zone directly across the street from any R zone or A zone designated for residential use in the General Plan, the loading facilities shall be distant at least 30 feet from said street, and the structures at least 50 feet from said street. (Ord. 3153 § 2 (Exh. A), 2010; Ord. 1281 § 1, 1970; Ord. 1212 § 1, 1969; prior code § 33.514(H)(4)).