(A) All new restaurants and industrial users employing a fats, oils, and/or grease process shall install an approved oil/grease trap or interceptor before discharging to the POTW. In the case of other uses including preexisting restaurants and industrial users, grease, oil, and sand interceptors shall be provided when, in the opinion of the Public Works Superintendent, they are necessary for:
(1) The proper handling of liquid wastes containing oil or grease in excessive amounts as to cause plugging or maintenance problems within the collection system;
(2) Any flammable wastes; and
(3) Other harmful pollutants.
(B) Such interceptors shall be so located as to be readily and easily accessible for cleaning, inspection, and sampling, and shall be approved by the Public Works Superintendent prior to installation.
(C) Grease and oil interceptors shall be constructed of impervious materials capable of withstanding abrupt and extreme changes in temperatures. They shall be of substantial construction, watertight, and equipped with easily removable cover which, when bolted in place, shall be gastight and watertight.
(D) Where installed, all grease, oil, and sand interceptors shall be maintained by the owner, at his or her expense to provide continuously efficient operation through periodic removal of accumulated grease, scum, oil, or other floating substances and solids deposited in the interceptor. All cleaning residues shall be satisfactorily disposed of in an approved, environmentally acceptable manner. Authorized City employees shall be allowed access to grease traps and interceptors for the purpose of inspection and/or to verify compliance with this section. Fat waste, oil, or grease removed from such a facility shall not be disposed of in the sanitary or storm sewer. A record of disposal shall be submitted to the City for review within 15 business days.
(E) The use of hot water, enzymes, bacteria, chemicals, or other agents or devices for the purpose of causing the contents of a pretreatment device to be discharged into the sanitary system, or to avoid the installation of a pretreatment device is prohibited.