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<br />frequently as required by the director. The certified tester must maintain the test gauge to a ::1:2% <br />accuracy. <br /> <br />(c) Responsibility of certified tester. When employed by a customer, the certified t~ster is responsible <br />for the testing of the customer's backflow prevention assemblies. The tester is responsible for the <br />competency and accuracy of all tests and reports performed or submitted by the tester, and for all work <br />done by any persons under the tester. <br /> <br />(d) Immediate reports by cert!fied tester. If a backflow prevention assembly test fails, or an assembly <br />malfunctions, the certified tester must immediately notify the director and the customer in writing, and <br />the tester must take all reasonable steps, including the cessation of water service through the assembly, <br />to prevent the contamination of the city water system. <br /> <br />(e) Inspection and repair. Each customer, when repairing or overhauling backflow prevention <br />assemblies, must use a licensed plumber who is a certified tester. The certified tester will make reports <br />of the repair to the customer and the director on the TNRCC test and maintenance report form. The <br />certified tester must include in the report a list of materials or replacement parts used. The tester must <br />ensure that parts recommended by the manufacturer of the assembly or device being repaired are used <br />in the repair or replacement of parts in the assembly or device. <br /> <br />(f) Procedure and equipment. It is unlawful for a certified tester to change the design, material, or <br />operational characteristics of a backflow prevention assembly during repair or maintenance without prior <br />approval of the director. All work performed by a certified tester's assistants must be performed in the <br />tester's presence, and the tester is responsible for all such work. <br /> <br />Sec. 86.575. Responsibilities of customers. <br /> <br />(a) Each customer has the primary responsibility of preventing contaminants from entering the <br />customer's system or the city water system. This responsibility starts at the point of deli:\{ery, and <br />includes the customer's complete internal water system. <br /> <br />(b) Each customer, as a condition of providing water service, must allow city water and wastewater <br />department personnel access to the customer's property to inspect and survey the customer's system for <br />potential contamination and backflow hazards. <br /> <br />(c) The customer, at the customer's expense, must install, operate, test and maintain approved <br />assemblies as required by this article. After any repair or overhaul of an assembly, the customer must <br />have it tested by a certified tester to ensure it is in proper operating condition. A customer must apply <br />for and obtain a permit from the director or the building official for the repiping or relocation of a <br />backflow prevention assembly. Upon completion of any such work, the customer must have the <br />assembly retested by a certified tester. The customer must maintain accurate TNRCC test and <br />maintenance report forms for all tests and repairs made to backflow prevention assemblies, and must <br />provide the director with copies of these reports on request. <br /> <br />Sec. 86.576-86.589. Reserved. <br /> <br />DIVISION 3. STANDARDS AND REQUIREMENTS <br /> <br />Sec. 86.590. General requirements. <br /> <br />(a) The TNRCC Rules & Regulations for Public Water Systems, as amended from time to time, will <br />govern the design, construction, operation and maintenance of the city water system with respect to cross <br />connection control and backflow prevention. Each customer must comply with all applicable provisions <br />of these rules and regulations. <br /> <br />C:\TEMP\backflow.doc <br /> <br />5 <br />