"Landfill" means a disposal facility or part of a facility where hazardous waste is placed in or on land and that is not a pile, a land treatment facility, a surface impoundment, an underground injection well, a salt dome formation, a salt bed formation, an underground mine, or a cave.
N.H. Admin. Code § Env-Hw 104.04
(See Revision Note at chapter heading for Env-Hw 100) #9360, eff 1-28-09