327 IAC 6.1-2-31.5
327 IAC 6.1-2-31.5 "Lagoon" defined
Cite as Ind. Admin. Code tit. 327, r. 6.1-2-31.5
Sec. 31.5. "Lagoon" means a type of storage structure that is constructed wholly or partially below the original grade of the earth surface.
A steel tank that is installed partially below ground is not a lagoon but a storage structure under 327 IAC 6.1-8.