1. (a) Flocculation following chemical coagulant mixing shall be completed in channels or tanks that meet the following requirements:

   1. (1) At least 2 flocculation tanks or channels having a combined detention period of between 20 and 30 minutes shall be provided;

   2. (2) Mixing shall be balanced to avoid under-mixing or over mixing such that:

      1. a. Chemicals are completely dispersed;
      2. b. Flocculated particles do not settle; and
      3. c. Flocculated particles are not sheared; and
   3. (3) Independent controls for each tank shall be provided.
2. (b) Settling tank design shall conform to Env-Wq 711.
3. (c) A means of dewatering all tanks shall be provided.

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