We're talking about the mature fine tailings. One of the things that has to be addressed by the industry is dealing with the stored, accumulated volumes. So in this consolidated treatment process, they dredge it up and pump it to big mixing chambers where they mix it with the fresh sand. And as those solids settle, they settle together. The clay particles are in the interstices of the sand--in between the sand grains--so the whole thing settles as a mass. That's where the clay ends up, mixed with the sand until it forms a solid surface. The water rises to the top, it's pumped off, and you're left with a solid surface. That's what they do with the clay.
Does that answer your question?