Aluminum

October 7, 2016--EPA probes toxic Colorado mine tunnels, investigates possible harm to human health (Denver Post)

Sloshing knee-deep through acid orange muck in a dark mining tunnel, an EPA crew wearing air monitors and headlamps peered at a massive concrete plug, one of 13 installed in these cored-out mountains above Silverton. They are wrestling with the Environmental Protection Agency’s riskiest problem as post-Gold King disaster cleanup begins: whether to try to contain toxic mine


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