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PFAS Investigation &
Management Program

RAAF Base Darwin

RAAF Base Darwin PFAS Investigation


Summary of the Investigation

In March 2017, Defence engaged Coffey to conduct a detailed environmental investigation into the presence of per- and poly-fluoroalkyl substances (PFAS) on and in the vicinity of RAAF Base Darwin.

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

There are three main stages to the investigation:

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) is in progress. The DSI involved sampling of soil, sediment, surface water, groundwater, small fish and edible produce. The sampling results are being analysed and once complete, a detailed report will be prepared and shared with relevant government and regulatory bodies as well as the community. The DSI report is expected to be finalised and published in January 2018.

Human Health and Ecological Risk Assessment
Based on the initial findings of the DSI, a Human Health and Ecological Risk Assessment (HHERA) will be conducted. The HHERA will evaluate potential risks to the human population and ecology and inform actions to mitigate risks.
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 information sessions, updates are provided through the project website, direct mail and information sheets as new information becomes available.