Waste management, page-2

Residues are mostly stored in TSFs and RSFs.

The residues first come from the plant as slurries (water plus solids) and are dumped into huge flat "ponds", where the solids settle. FGD/NUF slurries are settled together, separately from WLP. This is a huge amount of storage; these lined ponds are also called TSFs or temporary storage facilities.

The settled solids are removed and put in a "drying shed", where they continue losing water, mostly by evaporation aided by mechanical turning. Then they are put in piles that are compacted by heavy equipment traffic; these piles are called RSFs or residue storage facilities and can be under a roof or not.

The only other place I am aware residues are stored is in the earthworks surrounding the settling ponds and so on, which are occasionally raised (that's a lot of storage, too). Only FGD/NUF can be used for earthworks.

All water, including runoff from the top and seepage from the bottom of piles and earthworks is collected, recycled and treated in one manner or another.

Those are the facts as far as I can determine.

It is my opinion that the RSF under the roof is WLP. I can't "prove" that.