APPROVED. Accepted by the Department as either meeting an applicable specification stated or cited in this chapter, or suitable for the proposed use.

AUXILIARY WATER SUPPLY. Any water supply on, or available to, premises other than potable water supplied by the 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.

BACKFLOW. The undesirable reversal of flow in the potable water system caused by either backpressure or backsiphonage.

BACKFLOW PREVENTER. An approved assembly or means designed to prevent the reversal of the normal flow of water caused by either backpressure or backsiphonage.

BACKPRESSURE. Any elevation of pressure in a customer’s water supply system, above the pressure of the public potable water supply system, which could cause water or other liquids, mixtures or substances to flow from a customer’s water supply system into the distribution system of the public potable water supply system.

BACKSIPHONAGE. A reversal of the normal flow of water caused by a reduction of pressure in the potable water supply system which causes the flow of water or other liquids, mixtures or substances to flow from a customer’s water supply system into the distribution system of the public potable water supply system.

CERTIFIED TESTER. An individual certified and approved by an agency recognized by the Department to conduct testing on backflow prevention assemblies.

CONTAMINATION. An impairment in the quality of potable water, by sewage, industrial fluids, waste liquids, compounds or other material or fluids, to a degree which creates an actual hazard to the public health by poisoning or the spread of disease.

CROSS-CONNECTION. Any actual or potential connection or other arrangement of piping or fixtures, between a piping system containing potable water and piping system containing nonpotable water, waste fluids, industrial fluids or other fluids of questionable safety for human consumption, through which, or because of which, backflow may occur into the public potable water system. CROSS-CONNECTIONS include any temporary connections such as swing connections, removable sections, fourway plug valves, spools, dummy sections of the pipe, swivel or changeover devices or sliding multi-port tubes, hose connections or any other temporary or permanent devices, through which, or because of which, backflow can or may occur.

CUSTOMER WATER SUPPLY SYSTEM. The water distribution facilities within a customer’s premises commencing at the discharge point of the service connection.

DEPARTMENT. The City of San Luis Department of Public Works.

DISTRIBUTION SYSTEM. The network of conduits used to deliver potable water from the source facilities to the customer’s water supply system.

HAZARD, DEGREE OF. Evaluation of the potential risk to the public health and the adverse effect of the hazard upon the public potable water system.

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, pollution or plumbing hazard if introduced into the public potable water system. This may include, but shall not be limited to: polluted or contaminated waters; all types of process waters, wastewaters and used waters originating from the public potable water system which may have deteriorated in sanitary quality; chemicals in fluid form; plating acids and alkaline; 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 wells, springs, streams, rivers, bays, harbors, seas, irrigation canals or systems; or 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.

NONPOTABLE WATER. Water which is not safe for human consumption or which is of questionable quality for human consumption.

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 the water for domestic use.

POTABLE WATER. Any water that is safe for human consumption pursuant to the standards set by the Arizona Department of Environmental Quality.

PUBLIC POTABLE WATER SUPPLY SYSTEM. The source facilities and the distribution system under control of the City to the point where a customer’s water supply system commences. A customer’s water supply system commences at the discharge point of the service connection.

SERVICE CONNECTION. The terminal end of a service line from the public potable water system at its point of delivery to the customer’s water system where the Department loses jurisdiction and sanitary control over the water. If a meter is installed between the customer’s water supply system and the public potable water system, the service connection shall be the discharge-end of the meter. SERVICE CONNECTIONS shall also include a water connection from a fire hydrant and any other temporary or emergency water connections with the public potable water supply system.

SOURCE FACILITIES. All components and facilities utilized in the production, treatment, storage and delivery of potable water to the distribution system.

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 sanitary control of the Department. (Ord. 125 § 1, passed 9-11-1995. Code 2012 § 53.01.)