Section Env-Wq 1018.05 - Size of Effluent Disposal Area for Trench Systems(a) Sidewall surfaces in trench systems shall be used in calculating the EDA only if the septic tank outlet is at a higher elevation than the top of the EDA.(b) The effective EDA for trenches shall be calculated as twice the effective sidewall surface added to the width, multiplied by the length and then multiplied by the number of trenches, as shown in the following equation: {trench length x [trench width + (trench depth x 2)] } x number of trenches
N.H. Code Admin. R. Env-Wq 1018.05
(See Revision Note at chapter heading for Env-Wq 1000) #9086, eff 2-9-08
Amended by Volume XXXVI Number 41, Filed October 13, 2016, Proposed by #11184, Effective 10/1/2016, Expires 10/1/2026.