Hey sn, I actually thought you were being lazy but after looking...

Hey sn, I actually thought you were being lazy but after looking myself I realised that the info isn't there any more. Checked Comsec and PGO website.
From memory it has to be back filled and compacted with a clay layer over it, (capping).
You may get some info if you email them direct or google.
I did try google with no luck but I know that the info was still available in September and only dates back to some time a little earlier than that, ( this year).
I have also seen a previous report with plans of the same method of backfill that is now a requirement, which tells me they already had those expectations costed into aisc as they were aware of the requirements.
If you find it, Can you tag me with the link as I would like to keep a copy of it?
Others on this thread may also have it.

W