For the PEA, why did you choose to put off testing the purification proccess(caustic bake) at pilot plant scale to a later stage study(PFS, BFS)?
or
In regards to PEA, Why did you decide to keep the purification proccess at bench scale/lab scale while doing flotation at pilot plant scale.
I suspect it's a cost & time issue for bringing in the neccesary equipment but it would be good to hear it from management.