(a) "Underground injection" means the surface emplacement of fluids through a well.
(b) "Well" means either:
(1) A bored drilled, or driven shaft whose depth is greater than the largest surface dimension;
(2) A dug hole whose depth is greater than the largest surface dimension;
(3) An improved sinkhole; or
(4) A subsurface fluid distribution system as defined in 40 CFR 144.3.
N.H. Admin. Code § Env-Ws 384.02
#6521, eff 6-4-97 (See Revision Note at chapter heading for Env-Ws 300); ss by #7983, eff 11-1-03