What quantity of PCBs must be reported to the EPA in case of a spill?

The correct answer reflects the EPA's regulations regarding the reporting of spills that involve polychlorinated biphenyls (PCBs). Under the Toxic Substances Control Act (TSCA) and the regulations that pertain to PCBs, any spill involving more than 10 pounds must be reported to the EPA. This threshold is established to ensure that significant releases that could pose risks to human health and the environment are monitored and addressed, thus facilitating timely response efforts.

Understanding this requirement is essential for compliance with environmental regulations and for maintaining safety standards in situations where PCBs are present. The focus on a specific quantity, rather than any quantity, balances the need for regulatory oversight with practicality, ensuring that minor spills do not overwhelm reporting resources. This threshold helps prioritize incidents that might have more serious implications for health and the environment.