The executives also told an inquiry they weren't aware of possible contamination at the site before whistleblower and former CFA chief officer Brian Potter went to the media in late 2011.

Three former CFA senior executives were called to give evidence on Thursday at the Victorian parliamentary inquiry into the firefighting training college in Fiskville.

The centre was closed in March 2015 following the discovery of further contamination at the site.

There has been a strong community push to see the site reopened despite the evidence of contamination. 

Claire Higgins was chairperson of the CFA board between 2012 and 2015 and helped the board oversee its budget and allocation of government funding.

But Ms Higgins was unable to recall on Thursday how much money the board had approved for the reports and studies commissioned by the CFA as part of its investigation into Fiskville.

"How much money was spent by the CFA in commissioning these reports?" committee chair and Labor MP Bronwyn Halfpenny asked.

"How much has been spent on the legal costs defending the CFA?"

Ms Higgins said: "I don't know ...I don't recall those numbers."

Michael Wooten, the CFA's senior finance manager, also couldn't give a ballpark figure on the amount of funds spent.

"It seems surprising there wouldn't have been some sort of report that says 'hey, this is how much has been spent'," said Ms Halfpenny.

Since public hearings began in May, the inquiry has heard CFA management were aware there was contaminated sludge in one of its Fiskville dams and had commissioned their own tests for PFOS, a toxic chemical used in firefighting foam.

Euan Ferguson, who was the CFA's chief officer for five years before stepping down in November, on Thursday told the inquiry he had not heard any concerns, rumours or whispers about Fiskville before they were reported by the media.

The inquiry's final report is due in March after being pushed back a number of months due to delays. 

Little is known about when a new CFA training facility will open in the Ballan area. 

The government has committed funding for planning of a new facility, however,  have been unable to source a location for a training centre in the region. The government have reiterated the facility will definitely be built in the region.  

There is also no current funding for the actual construction leaving many to question what sort of facility will be built.