- (a) A perimeter of 6 inches to 2-1/2 feet of septic stone shall be placed around the precast unit.
- (b) The horizontal distance of septic stone used shall not be more than 1/2 the inside diameter of the drywell or the narrowest inside dimension of the precast drywell unit.
- (c) A minimum of 12 inches of septic stone shall be placed under the unit.
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