Hard to quantify that without doing a site survey. Consider that 8 oz of aviation gasoline detonates with the force of 15 sticks of dynamite. The night time air show exhibitions at the Miramar Naval Air Station included detonation of 55 gallon drums of gasoline. They would set off about 10 drums in quick succession to simulate a bombing pass. The explosions rattled the windows in my house 2 miles from the runway. The whole sky was a blazing orange for about a minute.
Feel free to scale up your storage tanks against that example.
marker