- (a) Oxidation ditch design shall be based on experience at other comparable facilities and meet the applicable requirements of Env-Wq 713.01 through Env-Wq 713.05 except as modified in this section.
(b) Oxidation ditch design shall comply with the following requirements:
- (1) Ditches shall be interconnected such that either ditch can be taken out of service temporarily and the ditches can be operated either in series or in parallel; and
- (2) Minimum horizontal velocity shall be not less than one foot per second.
Source. (See Revision Note at chapter heading for Env-Wq 700) #8590, eff 3-25-06; ss by #10693, eff 10-15-14; ss by #14258, eff 7-1-25, EXPIRES: 7-1-35