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O1/28/2013 U. Water System, Customer: The Customer-user's water system shall include those parts of the facilities beyond the termination of the City distribution system that are utilized in conveying City delivered domestic water to points of use. Sec. 38.38 Requirements for Backflow Protection A. Conditions Necessitating Backflow. In the case of premises having any of the following, the public water system shall be protected against backflow from the premises by installing an approved backflow prevention assembly in the service line, appropriate to the degree of hazard: 1. An auxiliary water supply or a supply that is not or may not be of safe bacteriological or chemical quality and that is not acceptable as an additional source by the City. 2. Industrial fluids or any other objectionable substances are handled in such a fashion as to create an actual or potential hazard to the public water system. This shall include the handling of process waters and waters originating from the utility system that have been subject to deterioration in quality. 3. Internal cross connections that cannot be permanently corrected and controlled. 4. Intricate plumbing and piping arrangements. 5. Where entry to all portions of the premises is not readily accessible for inspections purposes, making it impracticable or impossible to ascertain whether or not dangerous cross connections exist. B. Type of Backflow Protection. The type of protective assembly required under subsection 38.38(A) shall depend upon the degree of hazard that exists. 1. The public water system shall be protected by an approved air gap separation, or a reduced pressure principle backflow prevention assembly if approved by the Director, on each service to the premises for the following degrees of hazard. a. In the case of any premises where there is an auxiliary water supply. b. In the case of any premises where there is any material dangerous to health that is handled in such a fashion as to create an actual or potential hazard to the public water system. Examples of premises where these conditions will exist include sewage treatment plants, sewage pumping stations, chemical manufacturing plants, hospitals, mortuaries, and plating plants. c. In the case of any premises where there are cross connections, either actual or potential. d. In the case of any premises where, because of security requirements or other prohibitions or restrictions, it is impossible or impractical to make a complete in-plant cross connection survey. ATTY/FINAL ORD/2013/ORD.384/CROSS CONNECTION ORD.#2391 REV:01-17-13 PT FORMERLY MUFF#802 Page 6 of 13