Greens leader Meredith Hunter and MLA Amanda Bresnan yesterday met the taskforce's chairman, Chief Minister's Department chief executive Andrew Cappie-Wood.

After the meeting, a Greens spokesman said the meeting was ''confidential'' and no details could be disclosed.

Chief Minister Jon Stanhope said this week the taskforce had identified ''a number'' of alternative sites for the $1billion data centre and power station, but it had found the preferred site near Macarthur was the most suitable. He has since declined to disclose any more of the taskforce's findings.

Opposition Leader Zed Seselja criticised Mr Stanhope yesterday for revealing only the findings that supported the Government's view the project should not be moved.

Mr Seselja had initially been told he would be briefed on Tuesday, but talks have now been put off until tomorrow.

He was told yesterday the postponement was due to Mr Stanhope being ''not fully briefed''.

''I am not sure why the Chief Minister deems it appropriate to make self-serving public comments on an issue that his office has told my office he is not fully briefed on,'' he said.

The proponents, Technical Real Estate, want to stick to the Hume site.