ISR mining works with the right ore host, PEN Alkaline mining...

ISR mining works with the right ore host, PEN Alkaline mining has been challenging for that reason with very poor low production results.
As for the field trails distance wells results were not much better than Aklaline, PEN needed to do a short well circuit to lift field trial results.

Acid will improve recovery rates the big question is by how much,..

For New holders go back 2 years and read field trail announcements.