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<p>[QUOTE=&quot;calcol, post: 2759008, member: 77639&quot;]Hope your dad is careful.&nbsp; Mercury can be used to extract and purify gold in a way that is safe for the operator and for the environment.&nbsp; Main safety technique is to capture all vapors and condense them back to liquid mercury.&nbsp; Many small operators don&#039;t know that they should or don&#039;t know how or don&#039;t care.</p><p><br /></p><p>Cal[/QUOTE]</p><p><br /></p>

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