§ 20-140.7. Definitions.

Auxiliary water supply. Any water supply on or available to the premises other than the City of South Daytona's drinking water supply. These auxiliary waters may include water from another city's public water supply or any natural source such as a well, spring, river, stream, harbor and so forth; 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 City of South Daytona does not have sanitary control.

Back pressure. Any elevation of pressure in the downstream piping system (by pump, elevation of piping, or stream and/or air pressure) above the supply pressure at the point of consideration which would cause or tend to cause a reversal of the normal direction of flow through the backflow prevention device.

Back siphonage. A form of backflow due to the reduction in system pressure which causes a negative or sub-atmospheric pressure to exist at a site in the water system.

Backflow. The undesirable reversal of flow in a potable water distribution system as a result of a cross connection.

Backflow prevention device. A device, assembly or means designed to prevent backflow. Common types of backflow prevention devices are:

1.

Air gap. The unobstructed vertical distance through the free atmosphere between the lowest opening from any pipe or faucet conveying water or waste to a tank, plumbing fixture, receptor or other assembly and the flood level rim of the receptacle. These vertical, physical separations must be at least twice the diameter of the water supply outlet, never less than one inch.

2.

Reduced pressure backflow prevention assembly (RPZ). This device consists of two independently acting approved check valves together with a hydraulically operating, mechanically independent pressure differential relief valve located between the check valves and below the first check valve. These units are located between two tightly closing resilient seated shutoff valves as an assembly and equipped with properly located resilient seated test cocks.

3.

Double check valve assembly. This device consists of two internally loaded check valves, either spring loaded or internally weighted, installed as a unit between two tightly closing resilient seated shutoff valves and fittings with properly loaded resilient seated test cocks. This assembly shall only be used to protect against a non-health hazard.

4.

Dual check valve. A device designed for use under continuous or intermittent pressure situations consisting of two check valves in series.

Chief building official. The person responsible for administering and enforcing building and related codes, or their authorized deputy, agent or representative.

Contamination. Impairment of a potable water supply by the introduction or admission of any foreign substance that degrades the quality or creates a health hazard.

Cross connection. A connection or potential connection between any part of a potable water system and any other environment containing other substances in a manner that, under any circumstances would allow such substances to enter the drinking water system. Other substances may be gases, liquids or solids such as chemicals, waste products, steam, and water from other sources or any matter that may change the color to the water.

Cross connection control. A connection between a drinking or potable water system and a non-potable water system with an approved backflow prevention device properly installed and maintained so that it will continuously afford the protection commensurate with the degree of hazard.

Degree of hazard. The term derived from an evaluation of the potential risk to public health and the adverse effect of the hazard upon the drinking water system.

1.

Health hazard. A cross connection or potential cross connection involving any substance that could, if introduced into the drinking water supply, cause illness or death, spread disease or has a high probability of causing such effects.

2.

Plumbing hazard. A cross connection in a customer's drinking water system that has not been properly protected by an approved air gap or backflow prevention device.

3.

Non-health hazard. A cross connection or potential cross connection involving any substance that generally would not be a health hazard but would constitute a nuisance or be aesthetically objectionable if introduced into the drinking water supply.

4.

System hazard. An actual or potential threat of severe damage to the physical properties of the public drinking water system or the customer's drinking water system or of a pollution or contamination that would have a protracted effect on the quality of the drinking water in the system.

Industrial fluids. Any fluids or solutions that would constitute a health, system, pollution or plumbing hazard if introduced into a water supply. This may include, but not be limited to, polluted or contaminated waters; all types of process waters and used waters originating from the public drinking water system that 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 wells, springs, streams, rivers, bays, harbors, seas, irrigation canals or systems, and so forth; oils, gases, glycerin, paraffins, caustic and acid solutions and other liquid and gaseous fluids used in industrial or other purposes for firefighting.

Pollution. The presence of any foreign substance in water that tends to degrade its quality so as to constitute a non-health hazard or impair the usefulness of the water.

Public works director. The person in charge of the public drinking water system and invested with the authority and responsibility for implementation of an effective cross connection control program and for enforcement of the provisions of this article, or their authorized deputy, agent or representative.

Reuse. Water that is not safe for human consumption which is highly treated effluent from a wastewater treatment plant. Reuse water is generally used for irrigation purposes as a substitute for potable water.

Potable water. Water that is safe for human consumption as described by the public health authority.

Non potable water. Water that is not safe for human consumption or that is of questionable quality.

Service connection. The terminal end of a service connection from the public drinking water system, that is, where the City 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 for the service line ahead of any meter or backflow prevention device located at the point of delivery to the customer's water system. Service connection shall also include water service connection from a fire hydrant and all other temporary or emergency water service connections from the public drinking water system.

(Ord. No. 15-08 , § 1(Exh. A), 9-22-15)