ORD 2296 - Laserfiche WebLink

Ordinance No. 2296 Page 6 of 12 water supply. This may include, but not be limited to: polluted or contaminated waters; all types of processed waters and "used waters" originating from the public potable water system which may have deteriorated in sanitary quality; chemicals in fluid form; plating acids and alkalis, circulated cooling waters connected to an open cooling tower and/or cooling towers that are chemically or biologically treated or stabilized with toxic substances; contaminated natural waters such as from wells, springs, streams, rivers, bays, harbors, seas, irrigation canals or systems, etc.; oils, gases, glycerine, paraffins, caustic and acid solutions and other liquid and gaseous fluids used in industrial or other purposes or for firefighting purposes. "Low hazard cross -connection" means a cross -connection that has been found to not pose a threat to the potability or safety of the public water supply but may adversely affect the aesthetic quality of the potable water supply. Materials entering the public water supply through a low hazard cross - connection are pollutants or non -health hazards. "Pollution" means the presence of any foreign substance (organic, inorganic, or biological) in water which tends to degrade its quality so as to constitute a hazard or impair the usefulness or quality of the water to a degree which does not create an actual hazard to the public health but which does adversely and unreasonably affect such waters for domestic use. "Reduced pressure principle backflow prevention assembly" or "RP" means an assembly with -two independently acting internally -loaded check valves, with a hydraulically operating mechanically independent differential -pressure relief valve located between the two check valves and below the upstream check valve. The assembly shall have shut-off valves located upstream and downstream of the two check -valves, and test cocks to enable accurate field testing of the assembly. The entire assembly shall meet the design _and performance specifications and approval of a recognized and city -approved testing agency for backflow prevention assemblies. The device shall operate to maintain the pressure in the zone between the two check valves at a level less than the pressure on the public water supply side of the device. At cessation of the normal flow the pressure between the two check valves shall be less than the pressure on the public water supply side of the device. 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 devices must be readily accessible for in-line maintenance and testing and be installed in an above -ground location where no part of the device will be submerged. "State Water Board" means the State Water Resources Control Board or the local primacy agency having been delegated the authority to enforce the requirements of the CCCPH by the State Water Resources Control Board. "Water, nonpotable" means water which is not safe for human consumption or which is of questionable potability. "Water, potable" means any water which, according to recognized standards, is safe for human consumption. "Water service connections" means the terminal end of a service connection from the public potable water system; i.e., where the water purveyor 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. There should be no unprotected takeoffs from the service line ahead of any meter or backflow