Section 58.01.08.546 - DISTRIBUTION SYSTEM STORAGE FACILITIES01.Design. The applicable design standards of Section 544 apply to distribution system storage.02.Isolation. Finished water storage structures which provide pressure directly to the distribution system must be designed so they can be isolated from the distribution system and drained for cleaning or maintenance without causing a loss of pressure in the distribution system. This requirement may be met through available temporary tanks, redundant pumping capabilities, or other temporary means approved by the Department. If the finished water storage structure provides fire flow for the PWS, the PWS owner must provide the local fire authority advance notification of cleaning or maintenance events which isolate the structure from the distribution system and reduce available fire flow to less than the minimum required by the local fire authority.03.Drain. Drains must discharge to daylight in a way that will preclude the possibility of backflow to the reservoir and, where practical, be provided with an expanded metal screen installed within the pipe that will exclude rodents and deter vandalism. The drain will, when practical, discharge at an elevation between twelve (12) and twenty-four (24) inches above the receiving surface, and discharge over a drainage inlet structure or a splash plate.04.Level Controls. Adequate controls must be provided to maintain levels in distribution system storage structures. Level indicating devices must be provided at a central location.Idaho Admin. Code r. 58.01.08.546