I don't want to sound evil... but why? It's not like digging up low-intensity radioactive waste is going to end the world. Just look at how alive Chernobyl zone is... So let's say some people bring it up, they get sick and die, which makes people remember that radioactivity symbol = bad for the next several hundred years or so.

On a related note, wouldn't it make more sense to turn the radioactive waste into powder and dump it over a large area of sea or desert (Sahara is HUGE)? Given a large enough area it wouldn't even be detectable.