I think that you know the answer to your question, PRC is...

I think that you know the answer to your question, PRC is finished what sane person would work in a toxic environment like that and with this history.
It will have to be openast if they ever reopen it. An Oz mining expert reckons currrent managment were not up to the task regarding safety according to herald report.

The other poster probably meant air as giving oxygen to rescuers or having pure 0xygen is toxic and explosive.