Describe what constitutes a significant oil leak according to Maine regulations.

A significant oil leak, according to Maine regulations, is defined as a detectable release of oil to the ground or a waterway. This definition emphasizes the environmental impact and potential harm that even small amounts of leaking oil can cause. When oil is released into the environment, it can contaminate soil and waterways, harming ecosystems and potentially affecting drinking water supplies. Therefore, the focus on "detectable" means that any visible or measurable discharge should be taken seriously and addressed promptly to mitigate environmental damage.

In contrast, a minor stain on concrete may not constitute a significant release, as it does not imply a substantial or harmful amount of oil has leaked. An undetectable leak would not be classified as significant because it cannot be observed or measured, thus posing less immediate risk. A leak that is easily contained might indicate that the oil spill is manageable, but it does not necessarily denote a significant leak unless it is detectable and has potential impacts on the environment.