All food or food products intended for human or animal consumption shall be kept or stored in rodent-free and rat-proofed containers, compartments, rooms, buildings or structures. No person shall use any building or structure which is infested with rodents or which, in the opinion of the chief of environmental health, is likely to become infested with rodents for the manufacture, preparation, storage, display or service of any food or food product, unless such building is made free of rodents and is rodentproofed. (Ord. 4883-NS § 1 Exhibit A, Ch. 5 Art. 3 § 2, 1976)