What is required for a release of hazardous substances to necessitate notification?

The requirement for notification of a hazardous substance release is grounded in the concept of Reportable Quantity (RQ). Each hazardous substance is assigned a specific RQ, which determines the minimum amount that, if released into the environment, requires a notification to authorities. This is done to ensure appropriate response actions can be taken to mitigate any potential risks to human health and the environment.

The idea behind setting these thresholds is to focus resources and attention on substantial releases that pose a significant threat, rather than on minor spills that may not pose a serious risk. Thus, if the quantity of the substance released meets or exceeds its established Reportable Quantity, notification is mandatory to ensure that the situation can be addressed effectively.