Lawnbowler, what gold/silver that is not recovered from the present process goes to the tailings pile. There are many possible reasons for this but mostly it's metalurgical which means sometimes the process can be tweaked higher through grind, tank time, reagent mix, etc. In the case of ECU at present our oxide ore has some sulphide content and as I made note of a couple of days ago the company is considering a flotation circuit to float this sulphide bound gold and silver which could increase recoveries another 12-18%. Optimization is an ongoing process with mills.