Idaho Administrative Code
Title IDAPA 58 - Environmental Quality, Department of
Rule 58.01.16 - WASTEWATER RULES
Section 58.01.16.470 - FACILITY AND DESIGN STANDARDS FOR MUNICIPAL WASTEWATER TREATMENT OR DISPOSAL FACILITIES: SETTLING
Universal Citation: ID Admin Code 58.01.16.470
Current through August 31, 2023
01. General. (3-31-22)
a. Where
settling is being used, a minimum of two (2) units capable of independent
operation are desirable and shall be provided in all plants where design
average flows exceed one hundred thousand (100,000) gallons/day. Plants not
having multiple units shall include other provisions to assure continuity of
treatment. (3-31-22)
b. The design
of settling facilities shall include a minimum of two (2) units with flow
splitting. Sizing shall be calculated for both design average and design peak
hourly flow conditions, and the larger surface area determined shall be used.
(3-31-22)
c. The plant design shall
allow for isolation of each unit. The plant design shall allow for sludge and
scum removal. (3-31-22)
d. Baffling
shall be designed to control solids carry-over. (3-31-22)
e. The minimum side depth for primary
settling facilities shall be ten (10) feet. (3-31-22)
f. The minimum side depth for secondary
settling facilities shall be twelve (12) feet. (3-31-22)
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