That's a BIG boom!! We dug up a LOT of various UXO on Guam during the 3 years that I worked there. The biggest was an unexploded naval projectile that was about 8" in diameter and 18" long. Protocol was to call the Navy who would come out and inspect it and if it needed to be blown up, they would call the Air Force UXO team to do it. For that particular projectile that had up dig a hole about 8' deep, they put an explosive charge on it, we backfilled the hole with coral sand and they set it off. Some UXO was allowed to be reburied where it was found.
