Every establishment shall be provided with garbage and trash cans with fly-tight covers, made of metal or other approved material, for disposal of vegetable trimmings, food scraps and other refuse. A sufficient number of cans shall be available to prevent overloading, and tight-fitting covers shall be kept in place at all times. Garbage and trash cans shall be maintained in a sanitary condition and in good repair, and shall be cleaned at such intervals as the department may direct. Garbage and trash cans placed outside of the establishment shall be located on smooth, washable concrete or some other foundation approved by the health officer. Where there is an excess of vegetable trimmings or other waste material subject to decomposition, a fly-tight screened room shall be constructed of screen wire of not less than 14 meshes to the inch and all such excess waste material shall be kept in said screened room until removal from the premises. Where screened rooms are provided, the lower three feet of wall space shall be constructed of a smooth, washable material in a workmanlike manner, and maintained in good repair. (Ord. 855 § 2; prior code § 15.33).