At each permanent underground oil storage station, what is the fire extinguisher requirement?

The requirement for permanent underground oil storage stations to have two portable fire extinguishers is based on safety protocols established to manage the risks associated with flammable liquids. Having two extinguishers ensures that there is always one available for use, even if the first one becomes inoperable during a fire incident. This redundancy is crucial in emergencies where quick response time is essential to contain fires and minimize damage.

The specific mention of the weight of rock dust is also pertinent, as rock dust serves as a fire retardant and can help prevent the spread of flames, adding another layer of safety in an environment where oil storage is present. Requirements like these are established to comply with safety regulations that aim to protect workers, facilities, and the environment from the dangers associated with oil storage. Having two operational extinguishers aligns with best practices for fire safety and emergency preparedness in such potentially hazardous environments.