US lawIllinoisRegulationsTitle 35 — ENVIRONMENTAL PROTECTIONCHAPTER I: POLLUTION CONTROL BOARDPart 615 — EXISTING ACTIVITIES IN A SETBACK ZONE OR REGULATED RECHARGE AREASubpart F615.44435 Ill. Adm. Code 615.444Groundwater MonitoringLast amended: 2023Year: 2026Length: 24 wordsOfficial source Section 615 Section 615.444 Groundwater Monitoring The owner or operator of an existing on-site surface impoundment must comply with the requirements of Subpart B.Previous35 Ill. Adm. Code 615.443Next35 Ill. Adm. Code 615.445