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ROOT CONTROL MATERIAL <br /> Duke's will supply all components of the root control material; in order to insure the <br /> compatibility of said materials. All root control materials provided by Duke's will be <br /> specifically designed for use in sewers. Duke's crews will have Material Safety <br /> information available on site, including product labeling. <br /> Duke's will not use pour down products and /or products composed of acids or caustic <br /> compounds that are used to destroy roots or convey herbicide. <br /> Duke's will be responsible for all shipping, and storage of root control materials. <br /> Duke's is also responsible for the disposal of spent root control material containers. <br /> MANNER OF APPLICATION <br /> Application of the chemical root control agent will be by foaming in accordance with the <br /> best- recommended practice for conditions present in the line under treatment. All <br /> foaming procedures will be in strict accordance with the instructions on the container <br /> label. <br /> All solution will be mixed fresh, the day the work is to be performed. The water used to <br /> prepare the solution will be clear, cool, and free of acid, alkali, oxidizing agents, large <br /> amounts of oil, compounds or materials. <br /> A foam discharge hose will be inserted throughout the entire length of the sewer <br /> section to be treated. Hydraulic sewer cleaners or other such equipment that might <br /> damage the roots, thereby reducing the immediate absorption of the root control agent, <br /> will not be used in the treatment process. <br /> Chemical foam will be applied under pressure to assure that the entire sewer section is <br /> PP P <br /> completely filled with foam, and to assure that foam penetrates "wye" connections. <br /> The hose retrieval will be timed to evenly distribute the full quantity of foam throughout <br /> the entire area of treatment. The quantity of foam will be sufficient to completely fill the <br /> entire volume of the main line sewer, plus an additional 10% to allow for the <br /> penetration of material up connecting lateral sewers, and the Toss of material in <br /> manholes. Sewer service to homeowners will not be interrupted. <br /> An approved fresh water, backflow, prevention system will be provided, and will be <br /> used whenever filling any chemical storage tank with fresh water. <br /> MIXING AND HANDLING <br /> All liquid products will be packaged in re- usable containers that are DOT approved for <br /> such use. These containers will be part of a closed mixing and handling system. A <br /> closed mixing and handling system is provided in order to eliminate, or significantly <br /> minimize worker exposure to volatile liquid compounds. <br /> -2- <br />