During which circumstance would spills most likely result in intermittent discharges?

Spills are likely to result in intermittent discharges during various circumstances, including weather events, system malfunctions, and human error. Each of these factors can lead to situations where materials may be intermittently released into the environment.

Weather events, such as heavy rainfall or flooding, can overwhelm containment systems or lead to runoff, which might carry pollutants into nearby water bodies intermittently as conditions change. These discharges can vary in quantity and frequency depending on the severity and nature of the weather.

System malfunctions, such as a valve failure or a pump issue, can lead to unexpected releases of materials. If these failures are not continuous, the discharges may occur sporadically until the malfunction is addressed and system integrity is restored, leading to intermittent release patterns.

Human error can also contribute to spills that result in intermittent discharges. Mistakes in handling, or improper maintenance, may cause a spill that does not occur on a regular basis, thus contributing to the potential for intermittent discharge events.

Given that all these circumstances can independently lead to spills that result in intermittent discharges, it is accurate to conclude that the correct answer encompasses all scenarios.