Chapter 13.08
WATER SYSTEM CROSS-CONNECTIONS
Sections:
13.08.030 Termination of water service.
13.08.040 Backflow preventers-Required.
13.08.080 Premises must be available for inspection.
13.08.100 Chapter supersedes building codes.
13.08.120 Annual inspection and testing.
13.08.010 Prohibited.
The installation or maintenance of any cross-connection with the public water supply of the town of Mattawa is prohibited, except as authorized herein. Any such cross-connection now existing or hereafter installed is declared subject to immediate termination of water service and any such cross-connection shall be abated immediately.
(Ord. 381 §1, 1999).
13.08.020 State provisions.
The control or elimination of cross-connections shall be in accordance with the provisions of the Washington Administrative Code (WAC 246-290-490). The policies, procedures, and criteria for determining appropriate levels of protection shall be in accordance with The Accepted Procedure and Practice in Cross-Connection Control Manual, as published by the Pacific Northwest Section, American Water Works Association, May 1990, Fifth Edition, or any superseding edition.
(Ord. 381 §2, 1999).
13.08.030 Termination of water service.
The town of Mattawa shall deny or discontinue water service to any customer failing to cooperate in the installation, maintenance, testing, or inspection of backflow prevention assemblies required and as stated in WAC 240-290-490.
(Ord. 381 §3, 1999).
13.08.040 Backflow preventers-Required.
As a condition of new or continued water service, approved backflow prevention assemblies shall be installed and maintained by all customers who:
A. Are industrial or commercial customers not entitled to an exemption under Section 13.08.060 of this chapter;
B. Operate commercial or residential fire sprinkler systems connected to their plumbing;
C. Operate irrigation systems connected to their plumbing and the town’s system;
D. Maintain cross-connections of their water system with air conditioning systems, medical apparatuses, or other devices or processes where chemicals or other objectionable substances may be siphoned into the water system;
E. Maintain efficient plumbing arrangements, which makes it impractical;
F. In the judgment of the director of public works, compromises the public health or safety.
(Ord. 381 §4, 1999).
13.08.050 Definitions.
An “approved backflow prevention assembly” means a backflow prevention assembly model approved by the state of Washington, Department of Health and the town of Mattawa. Unless an exemption is granted, the minimum requirement for a backflow prevention assembly shall be that it consists of a double-check valve assembly. The reduced pressure back-flow assembly shall be installed at the service connection immediately downstream from the water meter prior to any branch connections.
(Ord. 381 §5, 1999).
13.08.060 Vacuum breakers.
Vacuum breakers may be substituted for other backflow prevention assemblies required under this regulation where the director of public works determines that the circumstances and good engineering practices allow such substitution without compromising protection of water quality and public health. Where an industrial or commercial customer can demonstrate to the satisfaction of the director of public works that there are no cross-connections with the water supply on their premises and that no health hazard is posed by reason of the presence of toxic materials on the environment, the director of public works may grant the customer an exemption from the cross-connection requirements herein. Decisions made under this section shall be made at the sole discretion of the director of public works to carry out the cross-connection control programs of the town. Exemptions are subject to periodic review and way be revoked whenever a cross-connection is made or a risk to public health or water quality is present.
(Ord. 381 §6, 1999).
13.08.070 Enforcement.
The director of public works and such staff members as he or she may designate are delegated the authority to inspect, approve, and disapprove backflow prevention assemblies; to require corrections, modifications, repairs, or maintenance on backflow prevention assemblies and to inspect all premises of customers where backflow prevention assemblies may be required. A minimum standard for the maintenance and installation of backflow prevention assemblies shall be those set forth in the Accepted Procedures and Practice in Cross-Connection Control Manual, May, 1990, Fifth Edition, as published by the Pacific Northwest Section of the American Waterworks Association and any subsequent edition or amendment of said manual. The director of public works is authorized to establish higher standards for installation and maintenance of backflow prevention assemblies where he or she finds that good engineering practice, industry standards, or the protection of public health requires, such higher standards.
(Ord. 381 §7, 1999).
13.08.080 Premises must be available for inspection.
As a condition of a continued water service, customers shall make their premises, including buildings and structures, to which water is supplied accessible to town personnel periodically to determine whether backflow prevention assemblies are required or are properly installed and maintained. Testing and inspections will be made annually.
(Ord. 381 §8, 1999).
13.08.090 Permit required.
Prior to the installation of irrigation systems and backflow prevention assemblies, the customer shall obtain a permit from the town for such installation.
(Ord. 381 §9, 1999).
13.08.100 Chapter supersedes building codes.
The requirements herein for backflow prevention assembly installation shall apply even though building codes may not require back-flow prevention assemblies.
(Ord. 381 §10, 1999).
13.08.110 Private wells.
The town of Mattawa prohibits interconnection of private water supplies with the town’s distribution system. Auxiliary water supplies (private wells, piped irrigation sources, etc.) are a major control hazard and therefore must be effectively isolated from the domestic water supply.
The town of Mattawa’s cross-connection control policies and requirements for customers with private wells are as follows:
A. No backflow protection is required if the source is verified to be permanently inactive and abandoned in accordance with the requirements of the Department of Health.
B. If the well remains active, an approved reduced pressure backflow assembly is required at the service connection to provide a measure of protection against inadvertent interconnection of the supplies.
New services will be locked off until compliance is verified by the town of Mattawa. Visual inspection of piping is required for premises retaining active well systems.
(Ord. 381 §11, 1999).
13.08.120 Annual inspection and testing.
All backflow prevention assemblies are subject to annual inspection and testing. The cost of installation, annual performance testing, and any required maintenance of the backflow prevention assemblies is the responsibility of the property owner.
(Ord. 381 §12, 1999).