How many feet around the dispensing unit must be kept clear of combustible materials?

The correct answer is that a minimum of 10 feet around the dispensing unit must be kept clear of combustible materials. This requirement is essential for safety reasons, as it helps to prevent fires and reduce the risk of accidents in areas where flammable liquids are stored and dispensed. Keeping a clear zone around fuel dispensing units allows for the effective management of spills and prevents any potential ignition sources from coming into contact with combustible materials. This safety measure is part of regulations that aim to protect both people and property in environments where hazardous materials are commonly used.