The interesting thing out of this is that even though I harbour a great distaste of him, his "defence" about the culpability of the QN operation on the environment may be correct. That is, it may be a legacy issue from the previous operation. QN may only be liable for either any further or new damage caused, or none at all (especially if the damage is actually better than the previous owner).
No one has really taken a good hard look into whether that claim is correct or not. Although suffice to say, even if they can prove that QN should really be liable for all the damage caused, it is still going to be difficult to almost impossible to get Palmer to cough up the money, which means that the government will be ordinarily saddled with the clean up bill. In any case, I don't think any one seems to be rushing to fix up the damage anyway.