A. Grease, oil, and sand interceptors shall be provided when required by State or Federal law, or, in the opinion of the City Engineer, they are necessary for the proper handling of liquid wastes containing grease in excessive amounts, or any flammable wastes, sand, or other harmful substances.

B. All interceptors shall be of a type and capacity as customarily necessary for such collections and approved by the City Engineer and shall be easily accessible for cleaning, inspection and sampling.