NAC445A.54038. Inclusion of features for reliability in design and construction of facility.

The following features for reliability or alternatives acceptable to the Division or the appropriate district board of health must be included in the design and construction of any facility to treat groundwater:

     1. If required, alarm devices to indicate failures in the coagulation, filtration and disinfection processes. The alarm must notify the person designated by the public water system as responsible for taking corrective action or, if the facility is unmanned, have the capability to shut the plant down until corrective action can be taken.

     2. If required, standby replacement equipment to ensure continuous operation and control of unit processes for coagulation, filtration and disinfection.

     3. Unless it is otherwise justified by an engineer and approved by the Division or the appropriate district board of health, multiple filter units are required to provide redundant capacity if filters are out of service for backwash or maintenance.

     (Added to NAC by Environmental Comm’n by R126-05, eff. 10-31-2005)