Looks like some News after lunch today.......https://www.stockwatch.com/News/Item?bid=Z-C:EMM-2959533&symbol=EMM®ion=C
Does't look like any of the metrics of the process have changed except for the product used, but price, availability, work hours ...seems like all costs are equal and the project economics still "robust" The study was done by Tetra Tech , so you got your two cents worth in there KolKut!
Cheers