The way around this is to put the waste in an old salt mine. Salt deposits accumulated there in the first place because it's been dry for thousands of years due

The way around this is to put the waste in an old salt mine. Salt deposits accumulated there in the first place because it's been dry for thousands of years due to geological features like an impermeable rock dome overhead. The real problem is that nobody wants this waste dump in their state. The Yucca Mountain complex is pretty much perfect for this application but politicians killed it.