What is a primary safety requirement for open yard storage of flammable liquids?

A primary safety requirement for open yard storage of flammable liquids is the presence of fire extinguishers. Having readily accessible fire extinguishers is crucial in providing immediate response capability in the event of a fire. Flammable liquids pose a significant hazard, as their ignition can result in rapid flame spread and major fire incidents. Fire extinguishers are vital for controlling small fires before they escalate, ensuring a safer environment for personnel and minimizing property damage.

While locking the storage area, using pallets, and labeling items are important safety and organizational practices, they do not directly provide the immediate fire suppression measures that fire extinguishers do. Locking the area helps prevent unauthorized access, storing materials on pallets can enhance air circulation and minimize moisture, and clear labeling is crucial for identifying hazards. However, none of these alternatives directly address the critical need for fire suppression in case of an emergency. Thus, the presence of fire extinguishers stands out as the most essential requirement for safety in the storage of flammable liquids.