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SEWER CLEANING <br />The designated sewer manhole sections shall be cleaned using hydraulically <br />propelled, high-velocity jet, or mechanically powered equipment. Selection of the <br />equipment used shall be based on the conditions of lines at the time the work <br />commences. The equipment shall be capable of removing dirt, grease, rocks, <br />sand, and other materials and obstructions from the sewer lines and manholes. <br />If cleaning of an entire section cannot be successfully performed from one <br />manhole, the equipment shall be set up on the other manhole and cleaning again <br />attempted. During initial stages of cleaning, low flow rates can be helpful. On <br />final cleaning, the line segment should be completely isolated. <br /> <br />ROOT REMOVAL <br /> <br />Roots shall be removed in the designated sections where root intrusion is a <br />problem. Special attention should be used during the cleaning operation to <br />assure almost complete removal of roots from the joints. Any roots which could <br />prevent the seating of sealants of the packer or could prevent the proper <br />application of chemical sealants shall be removed. Procedures may include the <br />use of mechanical equipment such as rodding machines, bucket machines and <br />winches using root cutters and porcupines, and equipment such as high-velocity <br />jet cleaners. Chemical root treatment may be used at the option of the owner. <br /> <br />MATERIAL REMOVAL <br /> <br />Debris such as dirt, sand, rocks, grease, and other solid or semisolid material <br />resulting from the cleaning operation shall be removed at the downstream <br />manhole of the section being cleaned. <br /> <br />DISPOSAL OF MATERIALS <br /> <br />Debris removed during sewer line cleaning shall be disposed of at only approved <br />and/or specified sites in strict accordance with all local, state, and federal <br />regulations. <br />