Ord 2001-058 - Laserfiche WebLink

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(b) It is unlawful for a customer to cause or allow water from an auxiliary water supply to enter the city water system. (c) It is unlawful for a person to make a connection from the city water system to a customer's system where an actual or potential contamination hazard to the city water system exists and there is no air gap separation between the drinking water supply and the source of potential contamination. Where a containment air gap is impractical and, instead, an individual internal air gap or mechanical backflow prevention assembly is used, a backflow prevention assembly will be required at the service cOlmection in accordance with A WW A Standards C510 and C511, and A WW A Manual M14, on those establishments handling substances deleterious or hazardous to the public health. This requirement does not apply if the customer maintains an adequate cross-connection control program that includes an annual inspection by a certified tester. (d) It is unlawful for a person to make any connection from the city water system to any condensing, cooling or industrial process or any other system of nonpotable usage over which city water system officials do not have sanitary control, in a manner that does not fully comply with the requirements of subsection (c) above. It is unlawful for any person to cause or permit backflow from any such process to the city water system. (e) All backflow prevention assemblies must be tested upon installation by a certified tester, and must be certified to be operating within specifications. Backflow prevention assemblies which are installed to provide protection against hazardous contaminants must also be tested and certified to be operating within specifications at least annually by a certified tester. (f) Gauges used in the testing of back flow prevention assemblies must be tested for accuracy annually in accordance with the University of Southern California's Foundation of Cross Connection Control and Hydraulic Research and/or the American Water Works Association Manual of Cross Connection Control (Manual M-14). Each certified tester that performs tests related to the city water system must include test gauge serial numbers on all test and maintenance report forms to verify that the tester uses gauges tested for accuracy. (g) A test report must be completed by the recognized backflow prevention assembly for each assembly tested. The signed and dated original must be submitted to the city for record keeping purposes. If the tester chooses to use a report which differs from the TNRCC form, it must contain at least all of the information required by the TNRCC form. (h) Each certified backflow prevention assembly tester that performs tests related to the city water system must retain all test and maintenance reports for at least three years, and must make the reports related to the city water system available to the director at the director's written request. (i) The use of a backflow prevention assembly at a service connection will be considered an additional backflow prevention, and will not negate the need for use of backflow prevention on internal hazards as defined in this article or the plumbing code. CD It is unlawful for a customer to install, or to cause or permit the installation of, a bypass that has not been approved in advance by the director. All bypasses on backflow prevention assemblies must themselves include provisions for backflow prevention as described in this article. Sec. 86.591. Types of backflow prevention. (a) Air gap separation or A/G. An air gap installation separating the city water system from the customer's system is acceptable in all situations listed in this article as long as it is properly maintained. Since air gap installation separations are easily eliminated or bypassed, the director may perform field surveys and require the additional protection of a mechanical backflow prevention assembly. The air C:\TEMP\backtlow.doc 6