"Properly shredded garbage" means the wastes from the preparation, cooking, and dispensing of food that have been shredded to such a degree that all particles will be carried freely under the flow conditions normally prevailing in public sewers, with no particle greater than one half inch (1.27 centimeters) in any dimension. (Ord. 1979-6 § 1 (1.07) (part), 1979)