Which quantity triggers compliance with emergency planning and community right-to-know reporting?

Which quantity triggers compliance with emergency planning and community right-to-know reporting?

• A. Any amount of listed substance
• B. A quantity at or greater than its threshold planning quantity
• C. Only when spilled
• D. Only if the substance is hazardous waste

Answer: (B)

The key idea is that emergency planning and community right-to-know reporting is triggered by the amount of a listed hazardous substance on site reaching or exceeding its threshold planning quantity (TPQ). Each listed substance has a TPQ value, and once the on-site quantity is at or above that level, the facility must participate in emergency planning and report to the local authorities and community as required by EPCRA. If the amount stays below the TPQ, those reporting requirements aren’t triggered.

That’s why the option stating “a quantity at or greater than its threshold planning quantity” is the best choice. It reflects that reporting depends on meeting or surpassing a defined threshold, not on any amount, spills, or waste designation alone.