There ought to be some sort of mkt for the sterile rock residue, too. Lining rail track, for instance -- this would save railroads from having to use any soil sterilant. Perhaps even pressing the residue shales into some sort of building material, even billiard tables.
This whole deal is nothing but win-win-win for the nation...which, I think, is why the envirokookfanaticdingbats are so adamant about not allowing kerogen from shale to be produced.
When the process is done do you have rubble or sand?