The chairman of the Environmental Protection Authority says he has made a decision on whether the agency should recommend the Government approve the James Price Point gas hub.
Last week, it was revealed four out of the five EPA board members were barred from contributing to a report on the Browse project because of potential conflicts of interest.
It was revealed four of the five board members were ruled ineligible to contribute because they have links with Woodside, its joint venture partners or the project's proponent, the State Government.
That left the EPA chairman Paul Vogel to make the decision, which will be revealed on Friday.
Dr Vogel has told the ABC it has been a long and thorough assessment, and he sought legal advice before making an informed decision.
"I actually have access to expert technical and scientific advice across the Office of EPA, the Department of Environment and Conservation, and any other agency that I deem necessary to inform my decision," he said.
"This has been a long and thorough assessment by the EPA, been going on for four years, which is an extraordinary length of time for a project, even a project of this nature." The State Opposition has said the Government needs to take more care when appointing board members to the EPA or risk damaging the organisation's reputation.
The opposition's Sally Talbot has questioned whether people with such close links to the mining industry should have been selected in the first place.
"We have the extraordinary situation where one of the biggest projects ever to come into our state effectively has no EPA to make the crucial decisions because four out of five of them are too close to industry to adjudicate," she said.
Integrity questioned A group opposed to the proposed gas hub at James Price Point has questioned the integrity of the EPA's recommendation on the project.
At the weekend, more than 100 people entered the site where preliminary work on the project has begun, to unfurl a protest banner.
The Broome Community No Gas Campaign group says the approval process is flawed.
The WA Wilderness Society's Peter Robertson has said it made a mockery of the whole idea of having a board and an EPA.
Dr Vogel's term as chairman is also about to expire and Mr Robertson says that creates a further conflict because he may be seeking re-appointment.
"We believe there is a perception of a conflict of interest in relation to the chairperson of the EPA," he said.
"I mean it wouldn't matter so much if there were four other people involved in this decision, maybe you would say that is acceptable." Dr Vogel has rejected the accusations.
"Whether I seek another term and whether Government wants me for another term is entirely up to me and Bill Marmion , it is no one else's business at all," he said.
Mr Robertson has written to the Environment Minister urging him to delay the report's release and appoint a new, independent panel to take over.