§ 52.05  CONTROL OF BACKFLOW AND CROSS-CONNECTIONS AND RELATED OPERATIONS.
   (A)   Responsibility. The water works shall be responsible for the protection of the public potable water distribution system from contaminants or pollutants through the water service connection. If, in the judgment of said water works an approved backflow prevention assembly is required as defined by I.A.C., 327 IAC 8-10, Rule for safety of the water system, the water works shall give notice in writing by mail to said customer to install such an approved backflow prevention assembly(s) at specific consumer's own expense; and, failure, refusal or inability on the part of the customer to install, have tested and maintain said assembly(s) shall constitute a grounds for discontinuing water service to the premises until such requirements have been satisfactorily met.
   (B)   Definitions. For the purposes of this section the following definitions shall apply unless the context clearly indicates or requires a different meaning.
      AIR-GAP. The unobstructed vertical distance through the free atmosphere between the lowest opening from any pipe or faucet supplying water to a tank, plumbing, fixture or other device and flood level rim of said vessel. An approved air-gap shall be at least double the diameter of the supply pipe, measured vertically, above the overflow rim of the vessel; and in no cases less than one inch.
      APPROVED. Accepted by the city as meeting an applicable specification stated or cited in this section, or as suitable for the proposed use.
      AUXILIARY WATER SUPPLY. Any water supply on or available to the premises other than the utility's approved public water supply. These auxiliary waters may include water from another utility's public potable water supply or any natural source(s) such as a well, spring, ricer, stream, etc., or USED WATERS or INDUSTRIAL FLUIDS. These waters may be contaminated or polluted or they may be objectionable and constitute an unacceptable water source over which the water utility does not have sanitary control.
      BACKFLOW. The reversal of the normal flow of water caused by either backpressure or backsiphonage.
      BACKPRESSURE. The flow of water or other liquids, mixtures or substances under pressure into the distribution pipes of potable water supply systems from any source or sources other than the intended source.
      BACKSIPHONAGE. The flow of water or other liquids, mixtures or substances into the distribution pipes of a potable water supply caused by reduction of pressure in the potable water supply system.
      BACKFLOW PREVENTER. An approved assembly or mean designed to prevent backflow.
      CONTAMINATION. An impairment of the quality of the potable water by sewage, industrial fluids or water liquids, compounds or other materials to a degree which created an actual or potential hazard to the public health through poisoning or through the spread of disease.
      CROSS-CONNECTION. Any physical connection or arrangement of piping or fixtures between two otherwise separate piping systems, one of which contains potable water and the other non-potable water or industrial fluids of questionable safety, through which, or because of which, backflow may occur into the potable water system.
      CROSS-CONNECTION CONTROL BY CONTAINMENT. The installation of an approved backflow prevention assembly at the water service connection to any customer's premises where actual or potential cross-connections within the customer's water system; or it shall mean the installation of an approved backflow prevention assembly on the service line leading to and supplying a portion of a customer's water system where there are actual or potential cross-connections which cannot be effectively eliminated or controlled at the point of the cross-connection.
      CROSS-CONNECTIONS CONTROLLED. A connection between a potable water system and a non-potable water system with an air-gap or approved backflow prevention assembly properly installed and maintained so that it will continuously afford the protection commensurate with the degree of hazard.
      DEGREE OF HAZARD. An evaluation of the potential risk to public health and the adverse effect of the hazard upon the potable water system.
      DOUBLE CHECK VALVE ASSEMBLY. An assembly of two independently operating, approved check valves with resilient seated shut-off valves on each end of the check valves, plus properly located resilient seated test cocks for testing of each check valve. The entire assembly shall meet the design and performance specifications as determined by laboratory and field evaluation programs resulting in an approval by a recognized and city approved testing agency for backflow prevention assemblies. To be approved these assemblies must be readily accessible for in-line testing and maintenance. Confined space installations will not be accepted.
      HEALTH HAZARD. Any condition, device or practice in the water supply system and its operation, which could create, or in the judgment of the city, may create a danger to the health and well-being of the water consumer.
      INDUSTRIAL FLUIDS SYSTEM. Any system containing a fluid or solution, which may be chemically, biologically or otherwise contaminated or polluted in a form or concentration such as would constitute a health, system, pollutions or plumbing hazard if introduced into an approved water supply. This may include, but not be limited to: polluted or contaminated water; all types of process water and USED WATER originating from the public potable water system which may have deteriorated in sanitary quality; chemicals in fluid form; plating acids and alkalines, circulating cooling waters such as from wells, springs, streams, rivers, irrigation canals or systems, etc.; oils, gases, glycerin, paraffin, caustic and acid solutions and other liquid and gaseous fluids used in industrial or other purposes or for firefighting purposes.
      NON-POTABLE WATER. Water which is not safe for human consumption or which is of questionable potability.
      PLUMBING HAZARD. A plumbing type cross-connection in a consumer's potable water system that has not been properly protected by an approved air-gap or approved backflow prevention assembly.
      POLLUTION. The presence of any foreign substance (organic, inorganic, or biological) in water which tends to degrade its quality so as to constitute a hazard to the public health and which does adversely and unreasonably affect such waters for domestic use.
      POTABLE WATER. Any water which, according to recognized standards, is safe for human consumption.
      REDUCED PRESSURE PRINCIPAL ASSEMBLIES. An assembly of two independently acting approved check valves together with a hydraulically operating, mechanically independent differential pressure relief valve located between the check valves and at the same time, below the first check valve, the unit shall include properly located resilient seated test cocks and resilient shut-off valves at each end of the assembly. The entire assembly shall meet the design and performance specifications as determined by a laboratory and a field evaluation program resulting in an approval by a recognized and city approved testing agency for back flow prevention assemblies. The assembly shall operate to maintain the pressure in the zone between the check valves at an acceptable level less than the pressure on the public water supply side of the assembly. At cessation of a normal flow the pressure between the two check valves shall be less than the pressure on the public water supply side of the assembly. In case of leakage of either of the check valves the differential relief valve shall operate to maintain the reduced pressure in the zone between the check valves by discharging to the atmosphere. When the inlet pressure is two pounds per square inch or less, the relief valve shall open to the atmosphere. To be approved these assemblies must be readily accessible for inline testing and maintenance and be installed in a location where no part of the assembly will be submerged. Confined space installations will not be approved.
      SUPERINTENDENT. The Superintendent of the Water Department of the city who is vested with the authority and responsibility for the implementation of an effective cross-connection control program and for the enforcement of the provisions of this section.
      SYSTEM HAZARD. An actual or potential threat of severe damage to the physical properties of the public potable water system or the consumer's potable water system or of a pollution or contamination which would have a protracted effect on the quality of the potable water in the system.
      USED WATER. Any water supplied by a water utility from a public potable water system to a consumer's water system after it has passed through the point of delivery and is no longer under the sanitary control of the water utility.
      WATER SERVICE CONNECTION. The terminal end of a service connection from the public potable water system; i.e., where the water utility loses jurisdiction and sanitary control over the water at its point of delivery to the customer's water system. If a meter is installed at the end of the service connection, then the service connection shall mean the downstream end of the meter is installed inside a building, then the water utility jurisdiction terminates at the downstream end of the outside shut off valve to the water service. There should be no unprotected takeoffs from the service line ahead of any meter or ahead of any backflow prevention assembly. Service connection shall also include water service connection from a fire hydrant and all other temporary or emergency water service connections from the public potable water system.
   (C)   Water system requirements.  The water system shall be considered as made up of two parts: the utility system and the customer system.
      (1)   The utility system shall consist of the source facilities and the distribution system; and shall include all air-gaps or approved backflow prevention assemblies properly installed and components of the facilities utilized in the production, treatment, storage, and delivery of water to the distribution system. The distribution system shall include the network of mains used for the delivery of water from the source to the customer's system.
      (2)   The customer system shall include those parts of the facilities beyond the termination of the utility distribution system which are utilized in conveying utility-delivered domestic water to points of use.
   (D)   Compliance. No water service connection to any premises shall be installed or maintained by the city unless the water supply is protected as required by state rules and the regulations of this section. If service of water to any premises by this section is not installed, tested and maintained, or if it is found that a backflow prevention assembly has been removed, bypassed, or if an unprotected cross-connection exists on the premises, service will not be restored until such conditions or defects are corrected.
   (E)   Inspection. The customer's system must be open for inspection at a reasonable time to authorized representatives of the city to determine whether there exist cross-connections, including violations of this section or regulations which are adopted through this section.
   (F)   Discontinuance of service. When a volatile condition becomes known, the Superintendent may deny or immediately discontinue service to the premises by providing for a physical break in the service line until the customer has corrected the condition(s) in conformance with the state statutes and city ordinances relating to plumbing and water supplies and the regulations adopted pursuant thereto.
   (G)   Installation of back flow prevention assembly. An approved backflow prevention assembly as defined by the IDEM Rule IAC 8-10, shall also be installed on each service line to a customer's water system at or near the property line or immediately inside the building being serviced; but, in all cases, before the first branch line leading off the service line wherever the following conditions exist:
      (1)   In the case of premises having an auxiliary water supply which is not or may not be of safe bacteriological or chemical quality and which is not acceptable as an additional source by the city, 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;
      (2)   In the case of premises on which any industrial fluids or any other objectionable substance is handled in such a fashion as to create an actual or potential hazard to the public water system, the public 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. This shall include the handling of process waters and waters originating from the utility system which have been subject to deterioration in quality; and
      (3)   In the case of premises having (1) internal cross-connection that cannot be permanently collected or controlled, or (2) intricate plumbing and piping arrangements or where entry to all portions of the premises are not readily accessible for inspection purposes, making it impractical or impossible to ascertain whether or not dangerous cross-connections exist, the public water system shall be protected against backflow from the premises by installing an approved backflow prevention assembly in the service line or lines where potential hazards could exist.
   (H)   Pre-existing facilities.
      (1)   Any backflow preventers or plumbing systems previously installed and/or approved by the city prior to the existence of this section will not be deemed compliant under the terms of this section simply due to their pre-existence and prior approval. The city will review the current operations and system hazards posed by any premises falling under this section to determine the acceptability of said preventer. If the backflow preventer(s) is found unacceptable, it shall be replaced in accordance with this section.
      (2)   Pre-existing facilities that have no backflow prevention device and where there is a definite present hazard shall be required to install an appropriate device, regardless of whether their plumbing system was previously approved by the city.
   (I)   Type of protective assembly. The type of protective assembly required shall depend upon the degree of hazard which exists as follows:
      (1)   In the case of any premises where there is an auxiliary water supply, the public water system shall be protected by an approved backflow prevention assembly as defined by the IDEM Rule IAC 8-10;
      (2)   In the case of any premises where there is water or a substance that would be objectionable but not hazardous to health if introduced into the public water system, the public water system shall be protected by an approved double check valve assembly;
      (3)   In the case of any premises where there is any material dangerous to the health such as to create an actual or potential hazard to the public water system, the public water system shall be protected by an approved air-gap separation or an approved reduced pressure principle backflow prevention assembly. Examples of premises where these conditions will exist include, but are not limited to sewage treatment plants, sewage pumping stations, chemical manufacturing plants, hospitals, mortuaries and planting plants;
      (4)   In the case of any premises where there are uncontrolled cross-connections, either actual or potential, the public water system shall be protected by an approved air-gap separation or an approved reduced pressure principle backflow prevention assembly at the service connection;
      (5)   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, the public water system shall be protected against back flow from the premises by either an approved air-gap separation or an approved reduced pressure principle backflow prevention assembly on each service to the premises; and
      (6)   In case of any premises having a lawn irrigation system, the public water system shall be protected by an approved pressure vacuum breaker backflow prevention assembly or an approved reduced pressure principle backflow prevention assembly.
   (J)   Approval of backflow prevention assembly. Any backflow prevention assembly required herein shall be a model and size approved by the city. The term APPROVED BACKFLOW PREVENTION ASSEMBLY shall mean an assembly that has been manufactured in full conformance with the standards established by the American Water Works Association (AWWA) entitled "AWWA C506-84 Standards for Reduced Pressure Principle and Double Check Valve Backflow Prevention Devices." Said assembly shall meet the laboratory and field performance specifications of the Foundation for Cross-Connection Control and Hydraulic Research (FCCC & HR) of the University of Southern California established by [material missing].
   (K)   Adoption of standards by reference. The AWWA and FCCC & HR standards and specifications specifically referenced in division (J) are hereby adopted and incorporated by reference.
   (L)   Duty to test and repair. It shall be the duty of the customer-user at any premises where backflow prevention assemblies are installed to have certified inspections and operational tests made upon installations at least once per year. In those instances where the city Water Superintendent deems the hazard to be great enough, the Superintendent may require certified inspections at more frequent intervals. These inspections and tests will be at the expense of the water user and shall be performed by a certified tester approved by the State of Indiana and the city. It shall be the duty of the city to see that these tests are made in a timely manner. If a customer-user does not have its backflow prevention assembly tested within 30 days of notification, the city may discontinue water service to the premises to maintain the safety of the public water system. These assemblies shall be repaired, overhauled or replaced at the expense of the customer-user whenever said assemblies are found to be defective. Records of such tests, repairs and overhauls shall be kept and made available to the city. The city shall maintain record of all testing for each required user.
   (M)   Exemptions. All presently installed backflow prevention assemblies which do not meet the requirements of this section that were approved devices for the purposes described herein at the time of installation and which have been properly maintained, shall be excluded from the requirement of these rules so long as the city is assured that they will satisfactorily protect the utility system. However, whenever the existing device is moved from the present location, fails testing or requires more than minimum maintenance or when the city finds that the assembly or its maintenance constitutes a hazard to health, the unit shall be replaced, at the consumer's expense, by an approved backflow prevention assembly meeting the requirements of this section.
   (N)   Certification of testers. Certified testers shall be listed with the city. In addition, certified testers will provide proof that test gauges used in testing backflow prevention assemblies have been calibrated and certified annually.
(Ord. 2-2016-1, passed 2-25-2016)