Old building materials containing asbestos that were found on the grounds of a Perth primary school have been deemed a very low risk to health.
West Australian Department of Education spokesman John Fischer said an environmental consultant assessed materials on surface soil at Gooseberry Hill Primary School and his advice had been endorsed by the Department of Health.
Mr Fischer said the low level of asbestos detected in the soil did not require the area to be sealed, but had been covered with compacted gravel as a precaution.
Parents had also tested the materials and the results would be passed on to an independent auditor, the department said.
Shire of Kalamunda president Andrew Waddell said the council had also undertaken testing and was advised the asbestos was low risk, but a final report was yet to be completed.
"It's well bonded, so it's not friable. And the air quality as well is not showing any evidence of any fibres," he told ABC radio on Wednesday.
"That doesn't mean we're not taking it deadly seriously - we are - and we're going to continue to ensure that it's removed."
Mr Waddell said concerned parents had alerted the council after seeing large amounts of asbestos out in the open - and 300kg had been removed over a 20-hectare area in the past month.
The asbestos was illegally dumped in the area up to 50 years ago and subsidence had brought it to the surface, he said.
"There is a small hot spot near the back of the school oval and I think that's the area most people are concerned about, and there's where we put a great deal of our attention."
