HB 4123 Summary

• Requires remedial actions to meet cleanup criteria for unrestricted residential use and restore affected aquifers to state drinking water standards unless technically infeasible.

• Establishes four cleanup categories (residential, nonresidential, limited residential, limited nonresidential) with default to residential category unless technically infeasible; allows site-specific criteria when categorical standards cannot be met.

• Creates framework for addressing groundwater venting to surface water through generic criteria, variances, mixing zones, ecological demonstrations, modeling demonstrations, and alternative monitoring points.

• Allows use of land and resource use restrictions (restrictive covenants, conservation easements, institutional controls) when cleanup to residential standards is technically infeasible, with requirements for recording and department notification.

• Makes provisions retroactively applicable to existing remedial action plans and court orders entered before June 20, 2012, allowing persons to modify response activities based on the bill's new standards.