1. (a) Sidewall surfaces in trench systems shall be used in calculating the EDA.

2. (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

Source. (See Revision Notes #1 and #2 at chapter heading for Env-Wq 1000) #11184, eff 10-1-16; ss by #14486, eff 2-1-26, EXPIRES: 2-1-36