(A) All businesses and school buildings within the corporate limits of the city in which there are in use any dishwashing machines, scullery and pot sinks, steam cookers, or other fixtures discharging grease-laden waste shall be provided with approved grease traps or interceptor to prevent grease from entering any soil, waste, pipe, or any other line of the city sewer system.
(B) Grease traps or interceptors must be approved for design and application by the State Plumbing Inspector, and shall have a certified minimum grease-retention efficiency of 90% and be sized in accordance with the established standards to correspond with the type and flow rate of the fixture.
(C) Grease traps shall be maintained in a clean and sanitary condition and shall be cleaned at designated intervals necessary to insure the exclusion of grease from the drainage system.
(D) All existing businesses and school buildings within the corporate limits of the city in which a grease trap or interceptor is not present at the time of the enactment of this chapter, shall have 60 days from the date of the enactment to provide for the installation of the approved grease trap or interceptor as provided for within the provisions of this chapter.