MI SB0605

Establishes new reporting requirements for hazardous substance releases, including notification to the department within 24-48 hours for reportable quantities and 30 days for off-site migration, with immediate remedial actions required upon discovery.

Creates mandatory "due care plans" for property owners/operators who know their property is a facility, requiring submission within 180 days of reporting with specific provisions for monitoring, operation, maintenance, and documentation of compliance.

Replaces "postclosure plans" and "postclosure agreements" with "remedial action closure reports" that must include land use restrictions, financial assurance mechanisms, monitoring requirements, and annual reporting obligations to ensure long-term effectiveness of remedial actions.

Establishes a "response activity review panel" of 15 qualified experts to resolve technical and scientific disputes regarding assessment of risk, response activity plans, and closure reports, with panel recommendations subject to director approval.

Adds civil fine penalties for late submissions of required reports and plans (up to $1,000 per day after 14 days late) and creates a new misdemeanor for failure to implement due care plans (fines $500-$5,000 per violation).