A grease, oil and sand interceptor (trap) shall be installed and maintained in continuously efficient operating condition at the expense of the property owner when, in the determination of the City of Burton or POTW Manager, an interceptor is necessary for the proper handling of liquid wastes containing grease in excessive amounts or any flammable waste, sand, or other harmful ingredient. An interceptor shall be required for every restaurant, fast food outlet, automotive repair shop or garage, car wash, or any other type of establishment or use as determined necessary by the City of Burton or POTW Manager. An interceptor shall not be required for a single-family detached residential or multiple-family residential dwelling unit when used solely for residential living purposes. All interceptors shall be of a type and capacity approved by the City of Burton and the POTW Manager, and shall be located so as to be readily and easily accessible for cleaning and inspection. Interceptors shall be constructed of impervious materials capable of withstanding abrupt and extreme changes in temperature, and shall be of substantial construction, watertight, and equipped with easily removable covers which when in place shall be gas-tight and water-tight.