Section Env-Wq 713.10 - Aerated Lagoon Design: Inlet and Outlet Piping(a) Aerated lagoon piping systems shall be designed to avoid areas of stagnation, short circuiting, solids deposition, or dead zones in the lagoons.(b) Inlet piping shall be located 1/5 to 1/3 of the total water depth from the lagoon bottom, but not less than 2 feet above the bottom of the lagoon bottom. On lagoons 150 or more feet wide, multiple inlets shall be used to enhance distribution of the influent flow.(c) Outlets shall be designed to provide multiple draw-off levels. Draw-off capability shall be provided over as much of the operating depth as feasible.(d) All aerated cells shall have influent lines which distribute the load within the mixing zone of the aeration equipment to minimize short-circuiting.(e) The influent line shall discharge vertically on to a concrete apron no smaller than 4 square feet to prevent scouring and erosion.N.H. Admin. Code § Env-Wq 713.10
(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.