Some times local LE, will handle those kind of things.
I know my neighbor found old dynamite primers in a box in a buiding on the farm, from her father who used them and 1/4 sticks of dynamite to remove stumps. When they opened up the wall to remodel, there was the dynamite too. He had stuffed it inside the wall next to an old chimney?? Stuff was at least 40 plus years old.