US lawIllinoisRegulationsTitle 35 — ENVIRONMENTAL PROTECTIONCHAPTER I: POLLUTION CONTROL BOARDSUBCHAPTER d: UNDERGROUND INJECTION CONTROL AND UNDERGROUND STORAGE TANK PROGRAMSPart 731 — UNDERGROUND STORAGE TANKSSubpart C731.13135 Ill. Adm. Code 731.131Operation and Maintenance of Corrosion Protection (Repealed)Last amended: 1992Year: 2026Length: 11 wordsOfficial source Section 731 Section 731.131 Operation and Maintenance of Corrosion Protection (Repealed)Previous35 Ill. Adm. Code 731.130Next35 Ill. Adm. Code 731.132