All garbage and rubbish containing food wastes shall, prior to disposal, be kept in leak-proof, nonabsorbent containers which shall be kept covered with tight-fitting lids when filled or stored, or not in continuous use; provided, that such containers need not be covered when stored in a special vermin-proofed room or enclosure, or in a food-waste refrigerator. All other rubbish shall be stored in containers, rooms or areas in an approved manner. The rooms, enclosures, areas and containers used shall be adequate for the storage of all food wastes and rubbish accumulating on the premises. Adequate cleaning facilities shall be provided, and each container, room or area shall be thoroughly cleaned after the emptying or removal of garbage and rubbish. Food waste grinders, if used, shall be installed in compliance with state and local standards and shall be of suitable construction. All garbage and rubbish shall be disposed of with sufficient frequency and in such a manner as to prevent a nuisance. (1961 code § 6.06.120.)