Idaho Administrative Code
Title IDAPA 58 - Environmental Quality, Department of
Rule 58.01.08 - IDAHO RULES FOR PUBLIC DRINKING WATER SYSTEMS
Section 58.01.08.545 - FACILITY AND DESIGN STANDARDS: TREATMENT PLANT STORAGE FACILITIES
Current through August 31, 2023
The design standards of Section 544 shall apply to treatment plant storage. (3-24-22)
01. Filter Wash Water. Filter wash water tanks shall be sized, in conjunction with available pump units and finished water storage, to provide the backwash water required by Section 521. Consideration must be given to the backwashing of several filters in rapid succession. (3-24-22)
02. Clearwell. When finished water storage is used to provide disinfectant contact time special attention must be given to tank size and baffling. An overflow and vent shall be provided. A minimum of two (2) clearwell compartments shall be provided to allow for cleaning or maintenance. Clearwells constructed under filters may be exempt from the requirements set out in Subsection 544.02.d. when the design provides adequate protection from contamination. (3-24-22)
03. Adjacent Storage. Finished or treated water must not be stored or conveyed in a compartment adjacent to untreated or partially treated water when the two (2) compartments are separated by a single wall, unless approved by the reviewing authority. (3-24-22)
04. Other Treatment Plant Storage Tanks. Unless otherwise allowed by the reviewing authority, other treatment plant storage tanks/basins such as detention basins, backwash reclaim tanks, receiving basins, and pump wet-wells for finished water shall be designed as finished water storage structures. In addition, these tanks/ basins shall be designed to allow for cleaning or maintenance through temporary tanks, standby pumping capabilities, or other means approved by the Department. (3-24-22)
