Environmental protection: groundwater contamination; limitation period for filing actions; revise. Amends sec. 20140 of 1994 PA 451 (MCL 324.20140).

SB 393 modifies Michigan's groundwater contamination law by clarifying deadlines for filing lawsuits related to cleanup costs and environmental damages. It sets specific time limits: for cleanup costs incurred before July 1, 1991, the deadline is now July 1, 1994 (previously unclear), and for unregulated hazardous substances before July 1, 1994, claims must be filed within 6 years of remediation start. The bill retroactively applies these changes to clarify past legal ambiguities. This directly affects property owners, businesses, and government entities involved in historic groundwater contamination cases.