The floors, walls, ceiling, partitions, posts, doors, and other parts of all preparation and processing areas shall be of such materials, construction and finish that they may be readily and thoroughly cleaned. The floors in all areas where water is used in the operation are to be so constructed and of such material as to be water tight and they shall be maintained in such condition as to stay water tight. All areas used for edible products shall be separate and distinct from those used for inedible products, such as fish meal reduction plants.
Cal. Code Regs. Tit. 17, § 12500