The EPA are a funny mob aren't they. They carry on over a plan like this yet, multiple sites I've worked on, especially the biggest IO mine in the state, not mentioning any names, it's just on a hill, pumps out 100's of 1000's of litres of inadequately treated wastewater from mutiple sewage treatment plants every day. I don't think one of their plants has passed the water quality criteria for over 9 months..... but that's ok, the royalties to the WA government have magical powers.