Wednesday, March 04, 2015 1:58:42 PM
Maybe Dunphy can comment on it, but I cannot fathom how they can operate this system without permits, no matter how environmentally safe they say it is. And, we don't know that this is the system being used on the Keystone ores. From the Youtube video, it looks like a ball mill and a shaker table, nothing at all like what Equitorial/First Nevada are promoting.
Tailings from a placer operation and tailings from a hard rock mine are entirely different. Placer operations are essentially sand and gravel operations, and the tailings are just washed sand and gravels and considered inert. Tailings from hard rock operations are the rejected portion of the ore, and have the potential to contain significant concentrations of heavy metals (arsenic, lead, mercury, etc.) and reactive sulfides. That's why ADEQ has a permit process in place for hard rock mines - not only for tailings, but for the waste dumps, and for the ores themselves.
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