The Department of Education and Training has released figures showing 35,000 cubic metres of material will be removed from the site by the end of this year.
Budget estimates show the remediation work is set to cost $11.6 million, about one third of the $31 million site redevelopment bill.
Acting Deputy Director of general infrastructure services Graham Atkins said the origin of the material containing the asbestos was unknown.
“But it is thought it was dumped on the land before the Wynnum North State High School was developed (there) in the early 1960s,” Mr Atkins said.
Aerial photos taken in the late 1950s show the oval area once owned by former Wynnum Mayor John Greene as part of his Cooroona property was a natural swamp and bushland.
She said the oval was not built when the school opened and students would venture into the bushland.
“We had kids getting bee and wasp stings because it was all overgrown,” she said.
Lindsay Horne, who was the school’s sports master from 1970, remembered the oval had been completed when he started teaching there in 1967.
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