What is the purpose of "reportable quantities" in HAZMAT transport?

The purpose of "reportable quantities" in HAZMAT transport is to establish thresholds for regulatory reporting requirements. This means that when the amount of a hazardous material reaches a certain specified threshold, the transporter is obligated to report its presence and details about it to regulatory authorities. This system is crucial for public safety and environmental protection, as it allows for the monitoring and management of hazardous substances that could pose a risk if released into the environment. By having defined reportable quantities, regulatory agencies can ensure that proper procedures and safety measures are followed when transporting hazardous materials, thereby minimizing the risk of accidents and ensuring that appropriate responses can be enacted if needed.