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When I first started tumbling with thio we had sweeps capabilities so the waste liquids were evaporated to a slurry and added sawdust (so it actually came out of the burn tray) when I had a full drum of the sweeps I assayed it and it had just a hair under an ounce of gold from over 200 half to full kilo stone lots. And the sweeps had about 350 ounces of silver in them. This was many moons ago but it was an insignificant quantity of gold from over 4000 oz of jewelry processed. So I never worried about using it on a customers material.

[QUOTE="4metals, post: 374911, member: 6914"] When I first started tumbling with thio we had sweeps capabilities so the waste liquids were evaporated to a slurry and added sawdust (so it actually came out of the burn tray) when I had a full drum of the sweeps I assayed it and it had just a hair under an ounce of gold from over 200 half to full kilo stone lots. And the sweeps had about 350 ounces of silver in them. This was many moons ago but it was an insignificant quantity of gold from over 4000 oz of jewelry processed. So I never worried about using it on a customers material. [/QUOTE]

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