Hon DAVID PARKER: Now that the Mataura site has been cleared up, the focus will move to the removal of material stored elsewhere in Southland. We will also continue to work with Rio Tinto and New Zealand Aluminium Smelters on the disposal of spent concrete cell linings that are stored at the Tīwai site. I think, perhaps, the wider lesson that we need to learn from the Mataura dross issue is that it's wrong for companies to be able to disavow responsibility for the by-product of their own production systems, and over the next year or two the Government will be considering whether companies should be able to contract out responsibility for disposal of their own hazardous waste. We'll consider whether legislative change is necessary to ensure that legal responsibility for hazardous waste rests with the producers of it.