That's way too much explosive. My old buddies in New Mexico used a piece, like 1/2 of a stick of dynamite. First drill a hole with an auger for the stick to slip into. It goes at an angle under the center of the stump. Stick a blasting cap in the end, cautiously push it into the hole, and fill with dirt. If done correctly, it makes a thump, not a bang. The stump will heave up several inches and a lot of the dirt will get shaken off the roots. Then, it can be removed with a mattock, saw, and maybe axe. Having the roots all standing alone really helps, and the chainsaw blades last a lot longer. If the kids get hold of the dynamite, they do some dumb stuff, and it makes a lot of noise, but doesn't do any work. In California, you cannot buy dynamite without some kind of license. If you do this correctly, you can remove a stump 10 feet away from the house without doing any damage.