2600 W CASINO RD AVIATION TECHNICAL SERVICES 2019-04-09

#111111°*,,40,--/-1 PUBLIC WORKS vicaad„, TO: Water Customer FROM: Tim Markham, Cross Connection Specialist SUBJECT: Washington State requirement for backflow periodic test and maintenance The following text of the Washington Administration Code 246-290-490 Section 7 regarding the requirement for the testing and maintenance of backflow prevention assemblies is quoted below. "(7) Approved backflow preventer inspection and testing. (a) The purveyor shall ensure that: (i) A CCS inspects backflow preventer installations to ensure that protection is provided commensurate with the assessed degree of hazard; (ii) Either a BAT or CCS inspects: (A) Air gaps installed in lieu of approved backflow prevention assemblies for compliance with the approved air gap definition; and (B) Backflow prevention assemblies for correct installation and approval status. (iii) A BAT tests approved backflow prevention assemblies for proper operation. (b) The purveyor shall ensure that inspections and/or tests of approved air gaps and approved backflow assemblies are conducted: (I) At the time of installation; (ii) Annually after installation, or more frequently, if required by the purveyor for connections serving premises or systems that pose a high health cross-connection hazard or for assemblies that repeatedly fail; (iii) After a backflow incident; and (iv) After an assembly is repaired, reinstalled, or relocated or an air gap is replumbed. (c) The purveyor shall ensure that inspections of AVBs installed on irrigation systems are conducted: (I) At the time of installation; • (ii) After a backflow incident; and (iii) After repair, reinstallation, or relocation. (d) The purveyor shall ensure that approved backflow prevention assemblies are tested using procedures acceptable to the department, such as those specified in the most recently published edition of the USC Manual. When circumstances, such as, but not limited to, configuration or location of the assembly, preclude the use of USC test procedures, the purveyor may allow, on a case-by-case basis, the use of alternate (non-USC) test procedures acceptable to the department. (e) The purveyor shall ensure that results of backflow prevention assembly inspections and tests are documented and reported in a manner acceptable to the purveyor. (f) The purveyor shall ensure that an approved backflow prevention assembly or AVB, whenever found to be improperly installed, defective, not commensurate with the degree of hazard, or failing a test (if applicable) is properly reinstalled, repaired, overhauled or replaced. (g) The purveyor shall ensure that an approved air gap, whenever found to be altered or improperly installed, is properly replumbed or, if commensurate with the degree of hazard, is replaced by an approved RPBA." 5,\AMcmlcha\Word\TIM'S STUmSTATE REGS.doc