Bonanza grade gold is only 8 to 10 grams/ton. ETI far more.More than bonanza grade gold? To have derived 310 grams of gold from 151 kgs of concentrates means 2.05 Kgs per tonne. The next question is what exactly is the composition of the concentrate that this much (Gold only) was leached from. Is it the leaching formula plus original feedstock (derived from crushed circuit boards) plus electricity and know how? Sounds beyond fabulous on the surface.