What is required around the fill opening of fuel tanks for spill protection?

The requirement for a containment basin around the fill opening of fuel tanks is essential for spill protection. A containment basin designed to hold between 5 to 25 gallons is specifically aimed at capturing any accidental spills or leaks during the fueling process. This capacity is generally considered adequate for containing small spills, thereby minimizing environmental contamination and ensuring safety.

The use of a gravel pit, a separate mixture of chemicals, or a large plastic tarp does not provide the necessary containment features needed for effective spill management. Gravel pits do not confine liquids, chemical mixtures may pose additional hazards, and tarps are not structured to contain spills effectively. Therefore, the correct approach is to implement a containment basin that offers a robust and compliant solution for spill protection around fuel tanks.