"Drive shoe" means a hardened steel cylinder designed to be welded or threaded onto the end of the steel well casing and manufactured to provide a seal to the bedrock surface.
N.H. Admin. Code § We 101.16
#6448, eff 1-29-97; ss by #7306, eff 6-13-00; ss by #9177, eff 6-13-08 (from We 101.15 )