Ontario Municipal Code Art. 2 Definitions

(a) “Air-gap separation” or “AG” shall mean a physical vertical separation of at least two (2) times the effective pipe diameter between the free- flowing discharge end of a potable water supply pipeline and the flood level of an open or non- pressurized receiving vessel, and in no case less than one (1) inch.

(b) "ANSI” shall mean the American National Standards Institute.

(c) “ANSI ISO 17024 accredited certifying organization” shall mean a State Water Board-recognized organization certifying backflow prevention assembly testers and meets CCCPH testing and performance standards.

(d) “Applicant” shall mean any person, firm, corporation, association, or agency who desires to obtain water, sewer, and/or recycled water service from the City.

(e) “Approved water supply” shall mean a water source that has been approved by the State Water Board for domestic use in a public water system and designated as such in a domestic water supply permit issued pursuant to of the Section 116525 of the California Health and Safety Code.

(f) “Auxiliary water supply” shall mean a source of water, other than an approved water supply, that is either used or equipped, or can be equipped, to be used as a water supply and is located on the premises of, or available to, a customer.

(g) "Backflow” shall mean an undesired or unintended reversal of flow of water and/or other liquids, gases, or other substances into the City’s water potable system.

(h) “Backflow prevention assembly” or “BPA” shall mean a mechanical assembly designed and constructed to prevent backflow, such that while in-line it can be maintained and its ability to prevent backflow, as designed, can be field tested, inspected and evaluated.

(i) “Backflow prevention assembly tester” shall mean a person who is certified by an American National Standards Institute ANSI ISO 17024 accredited certifying organization and holds a valid certification.

(j) “Backsiphonage” shall mean a form of backflow due to a reduction in system pressure, which causes a sub-atmospheric pressure to exist in the water system.

(k) “City” shall mean the City of Ontario, California.

(l) “City Council” shall mean the City Council of the City of Ontario, California.

(m) “City Manager” shall mean the City Manager of the City of Ontario, or his or her authorized representative.

(n) “Contaminants” shall mean any substance that shall impair the quality of water, in such a way as to create an actual hazard to the public health through poisoning, the spread of disease, etc.

(o) “Cross-connection” shall mean any actual or potential connection or structural arrangement between a public water system, including a piping system connection to the City’s distribution system and located on the premises of a customer or available to the customer, and any source or distribution system containing liquid, gas, or other substances not from an approved water supply.

(p) “Cross-Connection Control Policy Handbook” or “CCCPH” shall mean the State Water Board’s Cross-Connection Control Policy Handbook, which are standards and principles for California’s Public Water Systems.

(q) “Customer” shall mean a person, firm, or corporation who is the recipient of water service from the City.

(r) “Degree of Hazard” shall mean either a pollutant (non-health hazard) or contaminant (health hazard); derived from the assessment of the materials, which may come in contact with the City’s distribution system through a cross-connection.

(s) “Distribution system” has the same meaning as defined in of the California Code of Regulations, Title 22, Division 4, Chapter 2, Section 63750.50.

(t) “Double check detector backflow prevention assembly” or “DCDA” shall mean a double check valve backflow prevention assembly that includes a bypass with a water meter and double check backflow prevention assembly, with the bypass’s water meter accurately registering flow rates up to two gallons per minute and visually showing a registration for all rates of flow. This type of assembly may only be used to isolate low hazard cross-connections.

(u) “Double check detector backflow prevention assembly – type II” or “DCDA-II” shall mean a double check valve backflow prevention assembly that includes a bypass around the second check, with the bypass having a single check valve and a water meter accurately registering flow rates up to two gallons per minute and visually showing a registration for all rates of flow. This type of assembly may only be used to isolate low hazard cross-connections.

(v) “Double check valve backflow prevention assembly” or “DC” shall mean an assembly consisting of two independently acting internally loaded check valves, with tightly closing shut-off valves located at each end of the assembly (upstream and downstream of the two check valves) and fitted with test cocks that enable accurate field testing of the assembly. This type of assembly may only be used to isolate low hazard cross-connections.

(w) “Fire protection system” shall mean automatic fire sprinkler installations and/or private onsite fire hydrants served with potable water through a separate service connection.

(x) “Hazard assessment” shall mean an evaluation of an applicant, owner, or customer’s premises designed to evaluate the types and degrees of hazard at a user’s premises.

(y) “High hazard cross-connection” shall mean a cross-connection that poses a threat to the potability or safety of the City’s water supply. Materials entering the City’s water supply through a high hazard cross-connection are contaminants or health hazards.

(z) “Low hazard cross-connection” shall mean 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.

(aa) “ISO” shall mean the International Organization for Standardization.

(bb) “Premises” shall mean the lot, parcel, or property to which potable water is being supplied by the City or for which potable water service has been requested.

(cc) “Premises containment” shall mean protection of the City’s distribution system from backflow from a customer’s premises through the installation of one or more air-gaps or BPAs, installed as close as practical to the user’s service connection, in a manner that isolates the customer’s water supply from the City’s distribution system.

(dd) “Potable water” shall mean water furnished to the customer which meets applicable local, state and federal drinking water standards.

(ee) “Pollutants” shall mean any substance that impairs the quality of the water to a degree, which does not create a hazard to the public health but which does adversely and unreasonably affect the aesthetic qualities of such waters for domestic use.

(ff) “Readily accessible” shall mean capable of being reached for testing and/or maintenance, without the need of removing any access panel, door, or similar obstruction.

(gg) “Reduced pressure principle backflow prevention assembly” or “RP” shall mean an assembly with two independently acting internally loaded check valves, with a hydraulically operating mechanically independent differential-pressure relief valve located between the 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.

(hh) “Reduced pressure principle detector backflow prevention assembly” or “RPDA” shall mean a reduced pressure principle backflow prevention assembly that includes a bypass with a water meter and reduced pressure principle backflow prevention assembly, with the bypass’ water meter accurately registering flow rates up to two gallons per minute and visually showing a registration for all rates of flow.

(ii) “Reduced pressure principle detector backflow prevention assembly – type II” or “RPDA-II” shall mean a reduced pressure principle backflow prevention assembly that includes a bypass around the second check, with the bypass having a single check valve and a water meter accurately registering flow rates up to two gallons per minute and visually showing a registration for all rates of flow.

(jj) “Service connection” shall mean the terminal end of a service connection from the City’s distribution system (i.e., where the City may lose jurisdiction and sanitary control of the water at its point of delivery to the consumer’s water system) and the point in a water system where the City’s water supply can be protected from backflow using an air-gap or backflow prevention assembly. If a water meter is installed at the end of the service connection, then the service connection shall mean the downstream end of the water meter.

(kk) “State Water Board” shall mean the California State Water Resources Control Board.