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2. Discharge any wastewater containing FOG into the sanitary sewer system except in compliance with the BMP program for that facility; 3. Introduce any additives into the sanitary sewer system for the purpose of FOG or h' logically or chemically treating any substance introduced into any sanitary sewer system the purpose of treatment or pretreatment of wastewater, unless with a specific written _ dation by the Public Works Director; 4. Discharge wastewater at temperatures in excess of 160 degrees Fahrenheit to any grease interceptor or grease trap; 5. Operate grease interceptors if the unit has accumulated waste, both FOG and food solids, accounting for 25 percent or more of its wetted depth measured from the static water level to the interior tank bottom, with FOG and solids accumulation, exceeding 25 percent of the total operating depth of the grease interceptor; or 6. Discharge any FOG or any other solid materials removed from the grease control device to the sanitary sewer system. D. FOG interceptors installation requirements. 1. Except as provided for in subsection 802.15.M, any structure designed for or intended to be used for an FSE or FM/P must have a grease interceptor installed prior to discharging any wastewater into a sanitary sewer system. Such grease interceptor must comply with all conditions as set forth in the State of Minnesota Administrative Rule 4715 and the Ramsey County Public Health Department; 2. Property owners of any new commercial construction structure designed to house multiple tenants on a single parcel shall be responsible to install and maintain a single grease interceptor to serve each individual tenant. If a property owner demonstrates to the Public Works Director that it is not practically possible to install and maintain a single grease interceptor to serve each individual unit located in the structure,_inwhich case the Public Works Director has the discretion to approve a plan for such structure providing for more than one grease interceptor or a combination of grease interceptors and grease traps to service such property, which approval shall be in writing. Said approved plan shall include the minimum number of grease interceptors and grease traps that can reasonably serve the structure and the BMP program shall specifically include service for all approved grease intercepts and grease traps; 3. The owner of any structure occupied by more than one FSE or FM/P shall be jointly and severally liable with the owner of each FSE or FM/P served by any grease interceptor or any grease trap for the servicing and maintenance of that grease interceptor or grease trap and for any servicing and maintenance of any sanitary sewer system located downstream from said structure to remove any accumulations of FOG therefrom; 4. The Public Works Director may require existing FSE or FM/Ps and owners of structures in which such FSE or F 'Ps are located which have been identified as introducing FOG in any portion of the sanitary sewer system, and which introduction of FOG, in whole or in combination with other FOG contributors, has been responsible for causing the need for the city to clean such portion of the sanitary sewer system more than twice in a single calendar year to install grease interceptors or other FOG equipment as deemed necessary to comply with this section. Such installation shall be completed and operational within 180 days of notice by the Public Works Director. E. Grease interceptors. Maintenance and cleaning of grease interceptors. In the maintaining and routine cleaning of grease interceptors and any other grease control device, the owner of the FSE or FM/P and the owner of the structure in which it is located, if different from the owner of the FSE or FM/P shall be responsible for the proper removal and disposal by appropriate means of the captured material. If not performed by personnel under the direct control and direction of any such owner, such removal and haul shall be performed by currently licensed waste disposal haulers who are licensed for this activity. 1. Maintenance of grease interceptors shall be performed as frequently as necessary to protect the sanitary sewer system against the accumulation of FOG. Maintenance shall be performed as determined by inspection and application of the 25-percent rule, or at intervals