US lawIllinoisRegulationsTitle 35 — ENVIRONMENTAL PROTECTIONCHAPTER I: POLLUTION CONTROL BOARDPart 616 — NEW ACTIVITIES IN A SETBACK ZONE OR REGULATED RECHARGE AREASubpart E616.42335 Ill. Adm. Code 616.423Groundwater MonitoringLast amended: 2023Year: 2026Length: 18 wordsOfficial source Section 616 Section 616.423 Groundwater Monitoring The owner or operator must comply with the requirements of Subpart B.Previous35 Ill. Adm. Code 616.422Next35 Ill. Adm. Code 616.424