Reference to Liquid-Level Limit Control Requirements for Atmospheric Tanks:
According to The International Fire Code (IFC 2021), Section 5704.2.7.5, atmospheric tanks containing hazardous materials must be equipped with a liquid-level limit control if their capacity exceeds 500 gallons.
This requirement ensures that overfilling is prevented, reducing the risk of hazardous spills, leaks, and fire hazards.
Purpose of Liquid-Level Limit Controls:
These controls automatically shut off or alert operators when the liquid level reaches a predetermined limit.
They prevent tank overfill and reduce the risk of hazardous material release, which can cause fires, explosions, or environmental contamination.
Clarification of Incorrect Answer Choices:
A: 55 gallons # Incorrect
55-gallon drums are not subject to the same overfill protection requirements as large atmospheric tanks.
B: 100 gallons # Incorrect
Too low based on IFC 5704.2.7.5, which sets the requirement at 500 gallons.
C: 250 gallons # Incorrect
Some local regulations may require monitoring for tanks of this size, but IFC specifies 500 gallons as the mandatory threshold.
Conclusion:
The correct and verified answer is D (500 gallons) based on IFC 5704.2.7.5, ensuring proper overfill protection for atmospheric tanks containing hazardous materials.