HGP4 and ore samples

In the past you have indicated that the lab is quite busy with analyzing new ore samples. With the technology we have now, what is the percentage of these samples that HGP4 can successfully get the gold out of with 90%+ efficiency? I realize you might have to tweak the lixiviants formula for higher efficiency. Are you running into gold samples that we currently can not remove 90%+ of the gold at the current time?

Myanmar replaces Myitsone Dam Construction With Gold Mining

"Unregulated gold mining, often using mercury and cyanide, has been ravaging lands and rivers across Kachin State for several years, causing erosion, alteration of river flows, and toxic pollution," said the Kachin Development Networking Group in a statement today.
http://www.ens-newswire.com/ens/oct2011/2011-10-21-01.html