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PFAS Investigation &
Management Program

RAAF Base Learmonth

RAAF Base Learmonth PFAS Investigation


Summary of the Investigation

In September 2017, Defence commenced a detailed environmental investigation into the presence of per- and poly-fluoroalkyl substances (PFAS) on and in the vicinity of RAAF Base Learmonth.

The objective of this environmental investigation is to identify the nature and extent of PFAS in the environment from the use of legacy firefighting foam at the Base.

The three stages to the investigation are outlined below:

Preliminary Site Investigation
The first stage of the investigation, the Preliminary Site Investigation (PSI), has been completed.

Detailed Site Investigation
The Detailed Site Investigation (DSI) involved sampling on-base and in the surrounding region. The DSI Report is available on the publications page.

Human Health and Ecological Risk Assessment
Based on the DSI findings it has been determined that a Human Health Risk Assessment, to further assess the potential exposure-risks to people, is not required. A preliminary desktop Ecological Risk Assessment will be undertaken to further understand if detectable concentrations of PFAS, identified during the DSI, have the potential to pose an unacceptable exposure risk to the environment.
Further information on the investigation process can be found at the investigation process page.

The findings from the investigations will be used to identify and prioritise site specific management actions to address PFAS contamination.

Defence is committed to regularly updating the community throughout the investigation. As well as community engagement events, updates are provided through the project website, newsletters and factsheets as new information becomes available.