You know, that's an interesting thought.... Disposal vs storage. What classifies as "disposal?" Physically altering something? I'm going to think on this a little.

Edit: and apologies for not commenting on your link. You are correct, those are sites of commercial byproduct. From my understanding, the WIPP is only utilized for federal nuclear waste. At the moment, the US does not have a permanent geological storage/disposal facility for commercial waste. Each of those on that map are most facilities that used to have a reactor nearby.

But definitely in the size of a few foot all fields. At least for the North American WIPP site (been there in person a few times).

https://www.wipp.energy.gov/