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installed prior to discharging any wastewater into a sanitary sewer <br />system. Such grease interceptor must comply with all conditions as set <br />forth in the State of Minnesota Administrative Rule 4715 and the Ramsey <br />County Public Health Department; <br />2. Property owners of any new commercial construction structure designed <br />to house multiple tenants on a single parcel shall be responsible to install <br />and maintain a single grease interceptor to serve each individual tenant. If <br />a property owner demonstrates to the Public Works Director that it is not <br />practically possible to install and maintain a single grease interceptor to <br />serve each individual unit located in the structure, in which case the <br />Public Works Director has the discretion to approve a plan for such <br />structure providing for more than one grease interceptor or a combination <br />of grease interceptors and grease traps to service such property, which <br />approval shall be in writing. Said approved plan shall include the <br />minimum number of grease interceptors and grease traps that can <br />reasonably serve the structure and the BMP program shall specifically <br />include service for all approved grease intercepts and grease traps; <br />3. The owner of any structure occupied by more than one FSE or FM/P shall <br />be jointly and severally liable with the owner of each FSE or FM/P served <br />by any grease interceptor or any grease trap for the servicing and <br />maintenance of that grease interceptor or grease trap and for any servicing <br />and maintenance of any sanitary sewer system located downstream from <br />said structure to remove any accumulations of FOG therefrom; <br />4. The Public Works Director may require existing FSE or FM/Ps and <br />owners of structures in which such FSE or FM/Ps are located which have <br />been identified as introducing FOG in any portion of the sanitary sewer <br />system, and which introduction of FOG, in whole or in combination with <br />other FOG contributors, has been responsible for causing the need for the <br />city to clean such portion of the sanitary sewer system more than twice in <br />a single calendar year to install grease interceptors or other FOG <br />equipment as deemed necessary to comply with this section. Such <br />installation shall be completed and operational within 180 days of notice <br />by the Public Works Director. <br />E. Grease interceptors. Maintenance and cleaning of grease interceptors. hi the <br />maintaining and routine cleaning of grease interceptors and any other grease <br />control device, the owner of the FSE or FM/P and the owner of the structure in <br />which it is located, if different from the owner of the FSE or FM/P shall be <br />responsible for the proper removal and disposal by appropriate means of the <br />captured material. If not performed by personnel under the direct control and <br />direction of any such owner, such removal and haul shall be performed by <br />currently licensed waste disposal haulers who are licensed for this activity. <br />1. Maintenance of grease interceptors shall be performed as frequently as <br />necessary to protect the sanitary sewer system against the accumulation <br />of FOG. Maintenance shall be performed as determined by inspection and <br />application of the 25-percent rule, or at intervals specified in the permit, <br />whichever is more frequent. Maintenance shall be performed at least <br />every 90 days. <br />a. The 25-percent rule requires that the depth of oil and grease (floating <br />and settled) in a trap shall be less than 25 percent of the total <br />Page 44 of 82 <br />