An Act relative to liability for release of hazardous materials

This bill amends Massachusetts environmental laws to clarify when a hazardous material spill is considered a "condition of substantial release migration," which triggers mandatory reporting and cleanup responsibilities. It specifically defines these conditions to include scenarios where pollutants threaten human health, spread rapidly through soil or water, or enter public water supplies and sensitive areas like schools and homes. The legislation also introduces a new definition for "critical exposure pathways" to better identify routes where contaminants reach people through air or drinking water. By establishing these clearer criteria, the bill ensures that property owners and operators know exactly when they must take action to address environmental hazards.