Correspondence released earlier this week between the Resource Planning and Development Commission and Gunns from 2005 showed the planning body had grave concerns that the timber company had not addressed the issue.

Bass Greens MHA Kim Booth raised the issue in Parliament yesterday, calling on the Government to publicly release all documentation compiled by the RPDC during its aborted assessment of the pulp mill.

Deputy Premier Lara Giddings maintained the Government was committed to ensuring that the pulp mill met "best practice environmental standards".

"Regulation of the project will be accordance with the stringent requirements of the pulp mill permit and will involve the assessment of documents and plans submitted by Gunns Limited," she said.

"The proposed mill is required to have a comprehensive system to collect and destroy total reduced sulphur compounds before they are released into the atmosphere."

Mr Booth sought to table the letters between then-RPDC head Julian Green and Gunns managing director John Gay in Parliament yesterday, but the Government voted down the move.

CLICK HERE TO READ THE RPDC LETTERS.