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Ol/28/2013 <br /> spring, river, stream, harbor, and so forth; used waters; recycled water; or industrial <br /> fluids. These waters may be contaminated or polluted, or they may be objectionable and <br /> constitute an unacceptable water source over which the water purveyor does not have <br /> sanitary control. <br /> B. Backflow: The undesirable reversal of flow in a potable water distribution system as a <br /> result of cross connection. <br /> C. Backpressure: A pressure, higher than the supply pressure, caused by a pump, <br /> elevated tank, boiler, or any other means that may cause backflow. <br /> D. Backsiphonage: Backflow caused by negative or reduced pressure in the supply piping. <br /> E. Backflow Prevention Assembly: An assembly or means designed to prevent backflow. <br /> F. City: The City of Redwood City <br /> G. Contamination: An impairment of a potable water supply by the introduction or <br /> admission of any foreign substance that degrades the quality and creates a health <br /> hazard. <br /> H. Cross Connection: A connection or potential connection between any part of a potable <br /> water system and any other environment containing other substances in a manner that, <br /> under any circumstances would allow such substances to enter the potable water <br /> system. Other substances may be gases, liquids, or solids, such as chemicals, waste <br /> products, steam, water from other sources (potable or non-potable), or any matter that <br /> may change the color, add odor, or in any way change the quality of the potable water <br /> system. <br /> I. Customer-user: Any person or organization � whose premise contains a customer <br /> water system and who receives water or water service from the City's water system and <br /> whose name appears on the water bill for water serving that premise. <br /> J. Director: Director of Communitv Development for the City or <br /> authorized representative. <br /> K. Hazard, Degree of: The term is derived from an evaluation of the potential risk to public <br /> health and the adverse effect of the hazard upon the potable water system. <br /> L. Industrial-Fluids Systems: Any system containing a fluid or solution that may be <br /> chemically, biologically, or otherwise contaminated or polluted in a form or concentration, <br /> such as would constitute a health, system, pollution, or plumbing hazard, if introduced <br /> into an approved water supply. This may include, but not be limited to, polluted or <br /> contaminated waters; all types of process waters and used waters originating from the <br /> public potable water system that may have deteriorated in sanitary quality; chemicals in <br /> fluid form; plating acids and alkalies; circulating cooling water connected to an open <br /> cooling tower; and / or cooling towers that are chemically or biologically treated or <br /> stabilized with toxic substances; contaminated natural waters, such as wells, springs, <br /> streams, rivers, bays, harbors, seas, irrigation canals or systems, and so forth; oils, <br /> gases, glycerin, paraffins, caustic and acid solutions, and other liquid and gaseous fluids <br /> used in industrial or other purposes for fire fighting purposes. <br /> ATTY/FINAL ORD/2013/ORD.384/CROSS CONNECTION ORD.#2391 <br /> REV:01-17-13 PT FORMERLY MUFF#802 <br /> Page 4 of 13 <br />