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What is a "major release" in the context of UST monitoring?

A leak of a significant volume that poses a risk to the environment

In the context of Underground Storage Tank (UST) monitoring, a "major release" refers to a leak or spill of a significant volume of product. This type of release poses a considerable risk to the environment, including soil and groundwater contamination. Such substantial releases are of particular concern because they can lead to adverse effects on human health, ecosystems, and local water supplies if not quickly and effectively addressed.

Understanding the severity of a major release is crucial for UST operators, as regulations typically mandate immediate reporting and remediation efforts to mitigate environmental impacts. By contrast, other types of releases, such as minor spills or unnoticed small leaks, may not present the same level of urgency or risk to the environment, emphasizing the importance of distinguishing between varying levels of release incidents in regulatory compliance and environmental safety.

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A small leak that goes unnoticed

A release that occurs during the refueling process

A minor containment failure of a tank

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