Areas surrounding flammable liquid storage tanks and electric substations and transformers shall be kept free from dry grass, weeds, underbrush and other combustibles for at least how many feet in all directions?

Areas surrounding flammable liquid storage tanks and electric substations and transformers shall be kept free from dry grass, weeds, underbrush and other combustibles for at least how many feet in all directions?

• A. 25 feet
• B. 10 feet
• C. 50 feet
• D. 5 feet

Answer: (A)

Keeping the area around flammable liquid storage tanks and electrical substations and transformers free of combustibles creates a protective firebreak. This clearance reduces the fuel available for a fire and helps prevent ignition from heat, sparks, or arcs reaching nearby vegetation or other combustibles. The required distance is twenty-five feet in all directions, forming a circular buffer that also provides space for inspection and firefighting access. Smaller clearances would leave too much fuel close to ignition sources, while a much larger distance isn’t the standard here, making this twenty-five-foot rule the practical safety minimum.

Keeping the area around flammable liquid storage tanks and electrical substations and transformers free of combustibles creates a protective firebreak. This clearance reduces the fuel available for a fire and helps prevent ignition from heat, sparks, or arcs reaching nearby vegetation or other combustibles. The required distance is twenty-five feet in all directions, forming a circular buffer that also provides space for inspection and firefighting access. Smaller clearances would leave too much fuel close to ignition sources, while a much larger distance isn’t the standard here, making this twenty-five-foot rule the practical safety minimum.