- (a) Self-cleaning velocities shall be present in aerated lagoon distribution piping.
- (b) To prevent erosion due to discharge at the termination of distribution and interconnecting piping, the piping shall discharge vertically on a concrete apron 4 feet square, as a minimum.
- (c) Interconnecting piping shall discharge vertically near the lagoon bottom and at the dike, thereby reducing erosion effects.
- (d) Piping shall be ductile iron, stainless steel, HDPE, or SDR 35 PVC.
- (e) Distribution and interconnection piping clean-outs shall be provided.
- (f) Seepage collars shall be provided around any pipes penetrating the dike. The collars shall extend a minimum of 2 feet radially from the pipe.
- (g) Flow distribution structures shall be designed to effectively split hydraulic and organic loads equally to primary cells.
- (h) All primary cells shall have individual influent lines that terminate approximately at the mid-point of the cell width and at approximately 2/3 of the cell length away from the outlet structure to minimize short-circuiting.
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