System flushing and disinfection

An approved water system shall be flushed and disinfected after construction, repair, or modification and after an emergency situation, such as a flood, that may introduce contaminants to the system. A sample shall be collected from the water system and the results of the analysis shall be total coliform negative prior to placing the water system into service. P Statutory Authority: § 3.2-5121 of the Code of Virginia. Historical Notes: Derived from Virginia Register Volume 24, Issue 2 , eff. October 16, 2007; amended, Virginia Register Volume 32, Issue 22 , eff. July 12, 2016.