California Designated Operator Practice Exam

Under which condition may a local agency waive the requirement for overfill prevention equipment?

1. The tank fill point is in a protected area

2. The spill container is inadequate to collect any overfill

3. The tank system is filled by transfers of more than 25 gallons

4. The tank fill point is in an observable area

The correct answer is: The tank fill point is in an observable area

The correct choice highlights the importance of visibility and observation in preventing overfilling situations. When a tank fill point is in an observable area, it allows operators and personnel to closely monitor the filling process. This increased visibility can enhance safety by enabling staff to immediately respond to any issues that may arise during transfer, such as noticing a potential overfill situation in real-time. If the tank fill point is easily seen and monitored, it creates an opportunity for proactive measures to be taken, which can mitigate risks related to overfilling. Observability ensures that individuals are present to manage the fill process and react as necessary, making it a justification for waiving the need for additional overfill prevention equipment under certain conditions. In contrast, other conditions such as the presence of inadequate spill containers or the method of filling do not inherently provide the same level of oversight for potential overfill scenarios, making them less suitable for waiving the requirement for overfill prevention equipment.