Arsenic and antimony are also highly toxic. So, my question was more along the lines of "how does one mine something with As and Sb in it without causing an environmental catastrophe?"

Does all gold come alongside As and Sb? If so, okay, then I'd have to think they know how to get around the As & Sb problem.

Who knows, maybe they also try to capture and refine all the As & Sb.... they'd be worth money, as they have industrial uses.

I'm just asking questions cos I enjoy learning the answers.