US lawIndianaRegulationsTitle 312 — Natural Resources CommissionArticle 13 — ARTICLE 13. WATER WELL DRILLERS AND WATER WELL PUMP INSTALLERSRule 1 — Definitions13-1-4312 IAC 13-1-4312 IAC 13-1-4 "Bentonite" definedLast amended: 2023Year: 2027Length: 20 wordsOfficial source Cite as Ind. Admin. Code tit. 312, r. 13-1-4Sec. 4. "Bentonite" means clay material composed predominantly of sodium montmorillonite that meets American Petroleum Institute specifications Standard 13-A (1985).Previous312 IAC 13-1-3.7Next312 IAC 13-1-5