Okay, first let me say that every situation is quite different in terms of the operation and it gets rather complicated quite quickly with respect to running mine plans on your operation. What we did with our existing operation was to compare a mine plan using the existing technology at the time, which was consolidated tailings, and compared that time between what you might call tree-to-tree. The first tree that's harvested is compared to the first tree that's planted in reclamation. That mine plan was in the neighbourhood of 30 or 40 years. That's consistent with our reclamation on pond one, if you look at 1967 to 2007. When we rerun the mine plan using both our sand dumping technology as well as the TRO technology, which work hand in glove, we anticipate that we're able to go to a tree-to-tree type of number of more like 10 years. This is where the one-third number comes from in the prepared notes.
That's the best way that I can think of to answer that question. It is very specific to various mines. Of course, when it comes to certification there are a number of issues with that as well with respect to location of the reclaimed land and the certification process itself.