US lawIllinoisRegulationsTitle 35 — ENVIRONMENTAL PROTECTIONCHAPTER I: POLLUTION CONTROL BOARDSUBCHAPTER d: UNDERGROUND INJECTION CONTROL AND UNDERGROUND STORAGE TANK PROGRAMSPart 731 — UNDERGROUND STORAGE TANKSSubpart D731.14235 Ill. Adm. Code 731.142Hazardous Substances Systems (Repealed)Last amended: 1992Year: 2026Length: 8 wordsOfficial source Section 731 Section 731.142 Hazardous Substances Systems (Repealed)Previous35 Ill. Adm. Code 731.141Next35 Ill. Adm. Code 731.143