The following words and terms when used in this title shall have the following meanings, unless the context clearly indicates otherwise. In addition, other technical terms used shall have the meanings or definitions listed in the latest edition of “Glossary, Water and Wastewater Control Engineering” prepared by a joint editorial board representing the American Public Health Association, American Society of Civil Engineers, American Water Works Association, Water Pollution Control Federation, and as defined in the Manual of Cross-Connection Control, Eighth Edition.
A. APPROVED. Accepted by the Department as meeting an applicable specification stated or cited in this chapter, or as suitable for the proposed use.
B. AUXILIARY WATER SUPPLY. Any water supply on or available to premises other than the potable water supplied by Lake Havasu City. These auxiliary waters may include, but shall not be limited to water from another purveyor’s public potable water supply or any natural sources such as a well, spring, river, stream, harbor or treated effluent, wastewaters or industrial fluids. These waters may be polluted or contaminated or may be objectionable and constitute an unacceptable water source over which the Department does not have sanitary control.
C. BACKFLOW. The reversal of the normal flow of water caused by either back pressure or back siphonage.
D. BACK PRESSURE. Any pressure increase in the downstream piping system that is above the pressure of the potable water source which causes a reversal of the normal direction of flow.
E. BACK SIPHONAGE. A reversal of the normal flow of water caused by a reduction of pressure in the potable water supply systems which cause the flow of water or other liquids, mixtures or substances from a customer’s water supply system into the distribution system of the public potable water supply system.
F. 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 creates an actual or potential hazard to the public health by poisoning or the spread of disease.
G. CROSS-CONNECTION. Any physical connection or arrangement of piping or fixtures between 2 (or more) otherwise separate piping systems, 1 of which contains potable water and the other non-potable water or industrial fluids of questionable safety, or any other supply of unknown or questionable quality through which or because of which, backflow may occur into the potable water system. This would include any temporary connections, such as: swing connections, removable sections, 4-way plug valves, spools, dummy section of pipe, swivel or changeover devices, hydrant connections, or sliding multi-port tube.
H. BACKFLOW PREVENTER. An assembly or means designed to prevent backflow.
1. 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 the flood level rim of the 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 case less than 1 inch.
2. REDUCED PRESSURE PRINCIPLE ASSEMBLY. An assembly of 2 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 seated shut off valves at each end of the assembly.
3. DOUBLE CHECK VALVE ASSEMBLY. An assembly of 2 independently operating approved check valves with properly located resilient seated test cocks and resilient seated shut off valves at each end of the assembly.
4. PRESSURE VACUUM BREAKER ASSEMBLY. An assembly containing an independently operating loaded check valve and an independently operating loaded air inlet valve located on the discharge side of the check valve. Must be equipped with properly located resilient seated test cocks and resilient seated shut off valves at each end of the assembly.
I. CUSTOMER WATER SUPPLY SYSTEM. The water distribution facilities within a customer’s premises commencing at the discharge point of the water meter.
J. DEPARTMENT. The Lake Havasu City Operations Department.
K. DIRECTOR. The Lake Havasu City Operations Director or designee.
L. DISTRIBUTION SYSTEM. The network of conduits used to deliver potable water from the source facilities to the customer’s water supply system.
M. HAZARD, DEGREE OF. An evaluation of the potential risk to the public health and the adverse effect of the hazard upon the public potable water system.
N. INDUSTRIAL FLUID SYSTEM. Any system containing a fluid or solution which is chemically, biologically or otherwise contaminated or polluted in a form or concentration such as would constitute a health, system, pollutional or plumbing hazard if introduced into the public potable water system. This may include, but not be limited to: polluted or contaminated waters, all types of process 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 alkalies; circulating 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 well, 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 fire fighting purposes.
O. NONPOTABLE WATER. Water which is not safe for human consumption or which is of questionable quality.
P. POLLUTION. The presence of any foreign substance (organic, inorganic or biological) in water which tends to degrade its quality or impair its usefulness to a degree which does not create an actual hazard to the public health, but which does adversely and unreasonably affect such water for domestic use.
Q. POTABLE WATER. Any water which is safe for human consumption pursuant to the standards set by the Arizona Department of Environmental Quality.
R. PUBLIC POTABLE WATER SUPPLY SYSTEM. The source facilities and the distribution system under control of the Department to the point where a customer’s water supply system commences. A customer’s water supply system commences at the discharge point of the water meter.
S. ANNUAL FLOW AND VALVE CONFIDENCE TEST. Flow test to be performed in accordance with Lake Havasu City Fire Department procedures and disassembly of the single check valve (and/or alarm check) to determine if the valve components are in good working condition and function as designed.
T. SOURCE FACILITIES. All components and facilities utilized in the production, treatment, storage and delivery of the potable water in the distribution system.
U. USED WATER. Any water supplied by the Department from the public potable water system to a customer’s water system, after it has passed through the service connection and is no longer under the quality control of the Department.
V. SERVICE CONNECTION. Each multi-family commercial or industrial establishment to which potable water is supplied from the distribution system.
(Ord. 13-1090, § 58, passed 3-12-2013; Ord. 94-441, § 1, passed - -1994)
