Inside oil tanks must have a vent alarm if holding more than _____ gallons of oil?

A vent alarm is required for oil tanks holding more than 11 gallons of oil to prevent overfilling, which can lead to environmental hazards and spills. Vent alarms serve as a safety mechanism, alerting the operator when the tank is nearing its full capacity. This regulation ensures that proper safety measures are in place for tanks that store significant quantities of oil, thus minimizing the risk of leaks and spills that could cause damage to the surrounding environment. Stipulating a minimum of 11 gallons reflects the need for vigilance in managing oil storage safely, aligning with best practices in oil handling and storage regulations.