- (a) Concrete chamber beds shall be as specified in Env-Wq 1017.02(a).
(b) For a conventional stone-and-pipe system, the following shall apply:
- (1) The bed thickness shall consist of a minimum of 12 inches of stone total, with a minimum of 6 inches of stone under the 4 inch diameter pipes, and a minimum of 2 inches of stone over the pipes;
- (2) The pipes shall be laid evenly spaced a maximum of 5 feet on center and level, with 2.5 feet of septic stone from the center of the perimeter pipe in a bed to the outside of the bed; and
- (3) The bed bottom shall be the bottom of the stone in the bed.
- (c) A bed with an ITA approval shall be as specified in the most recent manufacturer’s design manual approved by the department pursuant to Env-Wq 1024.
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