HB 5171 Summary

• Amends Michigan's Natural Resources and Environmental Protection Act to modify cleanup criteria for contaminated sites, establishing categories for residential, nonresidential, limited residential, and limited nonresidential uses.

• Requires the Department of Environmental Quality to develop cleanup criteria based on EPA-IRIS (Integrated Risk Information System) hazardous substance values, with carcinogenic risk set at 1 additional cancer per 100,000 individuals and a hazard quotient of 1.0 for non-cancer effects.

• Mandates the department revise cleanup criteria by December 31, 2014, and every 6 months thereafter to reflect current EPA-IRIS values, incorporating research on fate and transport, risk assessment, and best practices from other states.

• Requires property zoning consistency documentation for nonresidential cleanup approvals, unless current use is a legal nonconforming use or zoning changes are finalized by local government.

• Repeals specified Michigan administrative code rules (R 299.5101 through R 299.5752) effective December 31, 2014, and repeals the sunset provision from 2012 PA 446.