According to federal UST regulations, a spill or overflow of how many gallons must be reported?

Under federal UST regulations, any spill or overflow of 25 gallons or more must be reported. This threshold is set to ensure that spills are managed appropriately to prevent environmental damage and to protect human health. Reporting spills of this magnitude allows regulatory agencies to respond effectively and take necessary actions to mitigate risks associated with contamination.

Smaller spills may also pose risks, but the regulatory focus is on spills that reach a threshold where they could have significant environmental impacts. Therefore, understanding the importance of the 25-gallon reporting threshold is crucial for compliance with regulations and for safeguarding the environment.