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City from any loss or damage that may be directly or indirectly occasioned by the installation of the building sewer. 6. Repair required on abandonment of sewer service by a property owner must be performed by a licensed contractor approved hired by the City. The cost shall be borne by the property owner. 7. A separate and independent building sewer shall be provided for every building, except where one building stands at the rear of another on an interior lot and no private sewer is available or can be constructed to the rear building through an adjoining alley, court, yard or driveway. The building sewer from the front building may be extended to the rear building and the whole considered one building sewer. The City does not and will not assume any obligation or responsibility for damage caused by or resulting from any such connection aforementioned. 8. Old building sanitary sewers may be used in connection with new buildings only when they are found, on examination and tested by the Public Works Supervisor or his representative, to meet all requirements of this Chapter. 9. The size, slopes, alignment, materials of construction of a building sewer, and the methods to be used in excavating,placing of the pipe,jointing,testing and backfilling of the trench, shall all conform to the requirements of the State of Minnesota Building and Plumbing Code or other applicable rules and regulations of the City. In the absence of code provisions or in the amplification thereof, the materials and procedures set forth in appropriate specifications of the ASTM and WPCF Manual of Practice No. 9, shall apply. 10. Whenever possible, the building sewer shall be brought to the building at an elevation below the basement floor. In all buildings in which any building drain is too low to permit gravity flow to the public sewer, sanitary sewage carried by such building drain shall be lifted by an approved means and discharged to the building sewer. 11. No person(s) shall make connection of roof downspouts, foundation drains, areaway drains, or other sources of surface runoff or groundwater to a building sewer or indirectly to the wastewater disposal system. 12. The connection of the building sewer into the public sewer shall conform to the requirements of the State of Minnesota Building and Plumbing Code or other applicable rules and regulations of the City, or the procedures set forth in appropriate specifications of the ASTM and the WPCF Manual of Practice No. 9. All such connections shall be made gastight and watertight, and verified by proper testing to prevent the inclusion of infiltration/inflow. Any deviation from the prescribed procedures and materials must be approved by the City prior to installation. ---�