For the purposes of this chapter, the following definitions shall apply:
A. Air-Gap Separation (AG). "Air-gap separation" means a physical break between a supply pipe and a receiving vessel. The air-gap shall be at least double the diameter of the supply pipe measured vertically above the top rim of the vessel, in no case less than one inch.
B. Approved Backflow Prevention Device. "Approved backflow prevention device" means devices which have passed testing laboratory and field evaluation tests performed by a recognized testing organization which has demonstrated their competency to perform such tests to the California Department of Health Services.
C. Approved Water Supply. "Approved water supply" means any water supply whose potability is regulated by a state or local health agency.
D. Auxiliary Water Supply. "Auxiliary water supply" means any water supply on or available to the premises other than the approved water supply.
E. AWWA Standard. "AWWA standard" means an official standard developed and approved by the American Water Works Association (AWWA).
F. Backflow. "Backflow" means a flow condition, caused by a differential in pressure, that causes the flow of water or other liquids, gases, mixtures or substances into the distributing pipes of a potable supply of water from any source or sources other than an approved water supply source, whether caused by back siphonage, backpressure or otherwise.
G. Contamination. "Contamination" means a degradation of the quality of the potable water by any substance which creates a hazard to the public health or which may impair the usefulness or quality of the water.
H. Cross-Connection. "Cross-connection," as used in this chapter, means any actual or potential connection between a potable water system used to supply water for drinking purposes and any source or system containing unapproved water or a substance that is not or cannot be approved as safe, wholesome and potable. By-pass arrangements, jumper connections, removable sections, swivel or changeover devices or other devices through which backflow could occur, shall be considered to be cross-connections.
I. Double Check-Valve Assembly. "Double check-valve assembly" means an assembly of at least two independently acting check-valves including tightly closing shutoff valves on each side of the check-valve assembly and test cocks available for testing the water-tightness of each check-valve.
J. Health Agency. "Health agency" means the California Department of Health Services.
K. Local Health Agency. "Local health agency" means the Los Angeles County department of health services.
L. Person. "Person" means an individual, corporation, company, association, partnership, municipality, public utility or other public body or institution.
M. Premises. "Premises" means any and all areas on a property which is served or has the potential to be served by the public water system.
N. Public Water System. "Public water system" means a system for the provision of piped water to the public for human consumption which has five or more service connections or regularly serves an average of twenty-five individuals daily at least sixty days out of the year.
O. Reclaimed Water. "Reclaimed water" means a wastewater which as a result of treatment is suitable for uses other than potable use.
P. Reduced Pressure Principle Backflow Prevention Assembly. "Reduced pressure principle backflow prevention assembly" means an assembly incorporating two or more check-valves and an automatically operating differential relief valve located between the two checks, a tightly closing shut-off valve on each side of the check-valve assembly, and equipped with necessary test cocks for testing.
Q. Service Connection. "Service connection" means and refers to the point of connection of a water user's piping to the water supplier's facilities.
R. Unprotected Cross-Connection. "Unprotected cross-connection" means any cross-connection not outfitted with an air-gap separation, double check-valve assembly or reduced pressure principle backflow prevention assembly.
S. Water Supplier. "Water supplier" means the person who owns or operates the approved water supply system. For the purposes of this chapter, the term "water supplier" shall mean the city.
T. Water User. "Water user" means any person obtaining water from an approved water supply system.
(Ord. 89-09-1041 § 1 (part))