Section Env-Wq 713.11 - Aerated Lagoon Design: Distribution and Interconnection Piping(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.N.H. Admin. Code § Env-Wq 713.11
(See Revision Note at chapter heading for Env-Wq 700) #8590, eff 3-25-06
Amended byVolume XXXIV Number 46, Filed November 13, 2014, Proposed by #10693, Effective 10/15/2014, Expires10/15/2024.