Grease traps with a guaranteed capacity of twenty pounds of pure grease shall be installed with each kitchen sink outlet wasting into any public sewer of the city for establishments serving from fifty to three hundred meals per day. Grease traps with a guaranteed capacity of sixty pounds of pure grease shall be installed for any establishment where more than three hundred meals are served per day, and for the operation of any private or public wash rack as mentioned above. (Ord. 576, 2008; Ord. 199 §16, 1975. Formerly 13.12.170).