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(A) An approved backflow prevention assembly shall be installed between the service connection and the point of potential backflow into a customer’s water supply system when in the judgment of the Director of Public Works a health, plumbing, pollution or system hazard exists. The device should be located after the water meter with a minimum of 12 inches and a maximum of 36 inches from the floor to the drain, a minimum of 12 inches from the well to the service pipe, adequate bracing to make the unit secure, 24 inches of unobstructed space from the face of the device for maintenance, repair and testing. The Director of Public Works may require a strainer and a manufacturer’s air gap device of approved type and size to be installed. A manufacturer’s approved air gap device will ensure that the proper air gap is maintained at all times.
(B) Backflow protection requirements of facilities connected to the city water system at the time of enactment of this code shall require the completion of appropriate backflow protection measures at these existing facilities in accordance with the following schedule:
(1) Phase I:
(a) Hospitals;
(b) Dental clinics;
(c) Medical clinics;
(d) Health clinics;
(e) Laboratories;
(f) Mortuaries;
(g) Nursing homes;
(h) Convalescent homes;
(i) Pharmaceutical plants;
(j) Cosmetic plants;
(k) Radioactive materials plants;
(l) Veterinary establishments;
(m) All city-owned facilities;
(n) Premises where, because of security requirements or other prohibitions, restrictions or other existing conditions, it is impossible or impractical to make a complete cross-connection premises survey;
(o) Automotive service stations;
(p) Car washes;
(q) Chemical processing plants;
(r) Chemical storage plants;
(s) Film laboratories;
(t) Film development facilities;
(u) Laundries;
(v) Dry cleaning facilities;
(w) Packing facilities;
(x) Petroleum processing plants;
(y) Petroleum storage plants; and
(z) Rendering plants.
(2) Phase II:
(a) Fire suppression systems;
(b) Premises utilizing boilers or water cooling systems;
(c) Premises utilizing water recirculating systems and pumps;
(d) Beauty salons;
(e) Barber shops;
(f) Swimming pools with connections to customer service pipes;
(g) Feed yards;
(h) Stock yards;
(i) Kennels; and
(j) Pet grooming salons.
(3) Phase III:
(a) Sand and gravel plants;
(b) Food processing plants;
(c) Beverage processing plants;
(d) Machine tool plants;
(e) Dye and metal processing plants;
(f) Metal plating plants;
(g) Multi-storied buildings greater than three stories in height;
(h) Paper product plants;
(i) Schools; and
(j) Multiple dwelling units served by one water service pipe.
(4) Phase IV: All nonresidential and residential facilities not included in Phases I through III.
(C) Upon notification by the city, the owner of an affected facility shall have 180 days to complete the required backflow protection measures. If the customer fails to complete protection measures, including submittal of initial certification test results to the city within 90 days, the water service line shall be shut off or penal provision enacted.
(D) Backflow preventers shall not be located in any area containing fumes that are toxic, poisonous or corrosive; nor in any area in which they could be damaged by freezing or by excessively high temperatures or pressures, vibrations, physical impact or structural stress; nor knowingly be allowed to conduct highly corrosive or sandy waters without a special testing and maintenance program to assure proper safe operation.
(E) The general and specific installation requirements as set forth in the most current edition of the Manual of Cross-Connection Control for those conditions or situations not otherwise provided for herein.
(F) Fire protection systems shall be equipped with not less than the backflow prevention assembly as described in the most current edition of the American Water Works Association’s Manual of Cross- Connection Control. Backflow preventers under this regulation and connected to fire protection systems shall be considered part of those systems. As such, they shall not be installed, moved, removed, replaced, shut off or in any way altered unless in strict compliance with the rules and regulations promulgated by the State Fire Marshal and shall be tested and repaired only by authorized fire protection system certified testers and a grade VI backflow test and repair technician. The backflow protection device shall be underwriters laboratory listed.
(G) The Nebraska Department of Health and Human Services regulations, Title 179, Ch. 2, as may be amended from time to time, are hereby fully incorporated as if set forth herein and are included within the terms and requirements of this subchapter.
(H) The city shall have the authority to issue any order consistent with the provisions of this subchapter in order to protect the public health and safety. Any order shall be in writing and shall clearly state the nature of the order, compliance requirements and set a reasonable date by which compliance must be met. All orders will be mailed to the customer certified mail, return receipt requested.
(I) When a containment type backflow assembly is installed, a thermo-expansion device must be provided for within the facility for which such assembly is installed.
(Prior Code, § 52.080) (Ord. 95-38, passed 12-18-1995) Penalty, see § 52.999
(A) The type of protection required under this subchapter shall depend upon the degree of hazard that exists as follows.
(1) An approved air gap separation or an approved reduced pressure principle backflow prevention assembly shall be installed where a public water supply system may be contaminated with any substance that could cause a system hazard or health hazard.
(2) An approved double check valve assembly shall be installed where a public water supply system may be contaminated with any substance that could cause a pollution hazard.
(3) An approved reduced pressure principle backflow prevention assembly shall be installed at the service connection where there exists a plumbing hazard.
(4) In the case of any premises where, because of security requirements or other prohibitions it is impossible or impractical to make a complete cross-connection survey of the customer’s potable water system, a reduced pressure principle backflow prevention assembly shall be installed at the service connection.
(B) An approved atmospheric or pressure vacuum breaker may be used as a backflow prevention assembly where it is not subjected to back pressures. The above assemblies shall be installed in accordance with the requirements of Nebraska Department of Health and Human Services.
(Prior Code, § 52.081) (Ord. 95-38, passed 12-18-1995) Penalty, see § 52.999
(A) Any approved backflow prevention assembly required by these provisions shall be installed at a location and in a manner approved by the Director of Public Works. For more instructions, see § 52.089, “Where protection is required.” The customer, at the customer’s sole expense, shall obtain and install the approved backflow prevention device(s) within 90 days of notice and as directed by the Director.
(B) Existing backflow prevention assembly approved by the Director of Public Works prior to the effective date of this rule and which are properly maintained shall, except for inspection, testing and maintenance requirements be excluded from the requirements of these provisions, but only if the Director of Public Works determines that the devices will satisfactorily protect the public water supply system and are approved for this installation. One hundred percent closing shutoff ball valves for testing shall be provided on existing backflow prevention assembly if deemed necessary for proper testing by the Director of Public Works. If deemed necessary by the Director of Public Works that an existing backflow prevention assembly requires replacement, it shall be replaced with an approved backflow prevention assembly.
(Prior Code, § 52.082) (Ord. 95-38, passed 12-18-1995) Penalty, see § 52.999
(A) No person shall install or maintain a water service connection to any premises where a booster pump has been installed on the service line to or within the premises, unless the booster pump is equipped with a low pressure cut-off designed to shut off the booster pump when the pressure in the service line on the suction side of the pump drops to 20 pounds per square inch gauge or less.
(B) It shall be the duty of the water customer to maintain the low pressure cut-off device in proper working order.
(Prior Code, § 52.083) (Ord. 95-38, passed 12-18-1995) Penalty, see § 52.999
(A) Yard hydrants or hose bibs which would be used by the customer to provide water to mix pesticides, fertilizer or other chemicals for direct use or aerial application to surface areas shall be equipped with an antisiphon vacuum breaker or where a cross-connection could occur.
(B) All underground lawn and garden sprinkler systems shall be equipped with an approved backflow prevention device, but annual testing is not required.
(Prior Code, § 52.084) (Ord. 95-38, passed 12-18-1995) Penalty, see § 52.999
(A) All proposed installations of fire suppression systems shall be reviewed by the Director of Public Works to determine the appropriate type of backflow prevention assemblies required.
(B) All proposed fire suppression systems requiring an antifreeze solution shall use a pharmaceutical grade antifreeze. The customer shall provide to the Director of Public Works annually a certification identifying the type of pharmaceutical grade antifreeze which is used. A double check valve backflow prevention device shall be installed in an approved manner.
(C) A double check valve of an approved type shall be installed on all proposed fire suppression systems not utilizing antifreeze, but this may be done only when there are no other cross-connections.
(D) (1) All existing fire suppression systems shall meet the requirements of divisions (B) or (C) above, whichever applies. An inspection by a certified fire suppression specialist shall be done to determine whether pharmaceutical grade antifreeze(s) have been utilized. This shall be done at the expense of the customer.
(2) If it cannot be certified that only pharmaceutical grade antifreezes have been used, then a reduced pressure principle backflow prevention assembly shall be installed as approved by the Director of Public Works. This also shall be done at the expense of the customer.
(E) In the event cross-connections such as those found in using auxiliary water supply systems or in providing other water additives such as foaming agents are necessary for the proper operation of the fire suppression system, then a reduced pressure zone backflow prevention assembly shall be installed in an approved manner unless the agent possesses a non-health hazard. If the agent possesses a non-health hazard, then a double check valve assembly can be used.
(Prior Code, § 52.085) (Ord. 95-38, passed 12-18-1995) Penalty, see § 52.999
(A) The Director of Public Works shall deny or discontinue, after notice to the customer thereof, the water service to any premises when the following occur:
(1) Any backflow prevention assembly required by these regulations is not installed or maintained in a manner acceptable to the Director of Public Works;
(2) It is found that the backflow prevention assembly has been removed or bypassed;
(3) An unprotected cross-connection exists on the premises;
(4) A low pressure cut-off required by these provisions is not installed and maintained in working order; or
(5) The Director of Public Works is denied entry to determine compliance with these regulations.
(B) The Director of Public Works shall immediately deny or discontinue, without notice to the customer thereof, the water service to any premises wherein a health hazard exists which constitutes an immediate threat to the safety of the public water system. The Director of Public Works shall notify the customer within 24 hours of the denial or discontinuation of service.
(C) Water service to the premises shall not be restored until the customer has corrected or eliminated the conditions or defects in conformance with these regulations and to the satisfaction of the Director of Public Works.
(Prior Code, § 52.086) (Ord. 95-38, passed 12-18-1995)
(A) Any backflow prevention assemblies required herein shall be of a model and size approved by the Director of Public Works. The term APPROVED BACKFLOW PREVENTION ASSEMBLY shall mean a device that has been manufactured in full conformance with the standards established by the American Water Works Associations (AWWA) entitled: Current AWWA C506-69 Standards for Reduced Pressure Principle and Double Check Valve Backflow Prevention Devices.
(B) The standards and specifications have been adopted by the Director of Public Works. Final approval shall be evidenced by a certificate of approval issued by an approved testing laboratory certifying full compliance with the standards and specifications.
(C) The Director of Public Works shall keep a current list of all certified suppliers and their appropriate list of makes and models of backflow prevention devices which the Director of Public Works has deemed approved.
(D) (1) The Director of Public Works may require a strainer and a manufacturer’s air gap device of approved type and size to be installed in conjunction with required backflow prevention devices.
(2) The installation of strainers shall preclude the fouling of backflow device(s) due to foreseen and unforeseen circumstances occurring to the water supply system such as water main repairs, water main breaks, fires, periodic cleaning and flushing of mains causing fouling of backflow device(s).
(3) A manufacturer’s approved air gap device will ensure that the proper air gap maintained at all times.
(Prior Code, § 52.087) (Ord. 95-38, passed 12-18-1995) Penalty, see § 52.999
REGULATIONS
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