What is the minimum distance between above ground flammable or combustible storage tanks?

• A. 3 Feet
• B. 5 Feet
• C. 1 Foot
• D. 10 Feet

Answer: (A)

The key idea is reducing the chance of fire spread between tanks by providing a safe clearance. Keeping above‑ground tanks containing flammable or combustible liquids separated by a small but real gap helps limit radiant heat transfer from one tank to another and gives space for venting, maintenance, and firefighting access. Three feet serves as the basic minimum buffer that limits heat exposure and allows enough room to operate around the tanks. While some situations (larger tanks, different products, or specific code requirements) may call for greater distances, the baseline minimum commonly used is three feet, making it the correct choice.