"Infiltration trench" means an in-ground or underground trench filled with stone to which runoff is either piped directly or flows overland, from which the water percolates into the surrounding soil.
N.H. Admin. Code § Env-Wq 1502.35
(See Revision Note #1 at chapter heading for Env-Wq 1500) #9343, eff 1-1-09; (See Revision Note #2 at chapter heading for Env-Wq 1500) ss by #9817-A, eff 12-1-10