OK...If Volcanoes are not a good choice for disposing of nuclear waste,

HOW ABOUT....

Disposing of hazardous waste in a geological subduction zone? In this area waste materials would sink into the earth below the volcano to be taken down in vacuum cleaner style to the crust of the earth and not to be seen but in diluted form several hundred years later.

I say this thinking not all hazardous waste is that much waste. We NEED some of it that cannot be obtained anywhere else on earth. So some processing is in order here.