A. Interceptors must be maintained by the user in continuously effective operating condition at all times, which minimally requires the following: (1) periodic removal of all accumulated grease, lint, oil, sand, sludge, solids, wastewater, and other materials; (2) thorough cleaning of the pretreatment device interior; and (3) necessary repairs to internal structures.

B. Users of gravity interceptors must fully pump out and clean the interceptor at a frequency such that the combined grease, lint, oil, sand, sludge, and solids accumulation does not exceed 25 percent of the total liquid volume capacity as measured at the static water level of the interceptor. Except as set forth in subsection C of this section, users of gravity interceptors must fully pump out and clean the interceptor at least once every 12 months unless granted a variance by the Director.

C. Users of gravity interceptors at food service establishments that capture FOG must fully pump out and clean the interceptor at a frequency of not less than once every three months unless granted a variance by the Director.

D. Users of hydromechanical interceptors must fully pump out and clean the interceptor at a frequency of not less than once every 30 days unless granted a variance by the Director. No hydromechanical interceptor may be allowed to go more than 90 days without maintenance.

E. The removed contents of an interceptor must be lawfully disposed and may not be reintroduced or decanted back into the interceptor, a sewer cleanout, another interceptor, or other non-allowed opening of a collection system or private sewer system.

F. The user must keep records and documentation of all cleaning, volume of waste removed, device capacity, waste disposal, repair, replacement, and maintenance required to demonstrate compliance with this section. Records and documentation must be available at the facility or site for a minimum of three years from the date created and be made available to the Director upon request.

G. The use of chemicals, enzymes, proteins, bacteria, grease solvents, emulsifiers, or other similar substances to dissolve FOG in lieu of physical cleaning is prohibited. (Ord. No. G-1935, § 2; Ord. No. G-3662, § 1; Ord. No. G-4635, § 1f, 2004; Ord. No. G-6740, § 1, 2020)