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PFAS Investigation &
Management Program

RAAF Base Pearce

RAAF Base Pearce PFAS Investigation

Summary of the Investigation

In April 2016, Defence commenced a detailed environmental investigation into the presence of per- and poly-fluoroalkyl substances (PFAS) on and in the vicinity of RAAF Base Pearce.

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) 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 mid 2018. Initial findings of the DSI can be found in the November Investigation Update factsheet.

Human Health and Ecological Risk Assessment
Based on the DSI findings, a Human Health and Ecological Risk Assessments (HHERA) commenced in late 2016. The HHERA will evaluate potential exposure pathways to people, plants and animals and will be used to inform potential actions to reduce PFAS exposure. The HHERA report is expected to be published in mid 2018. When the HHERA Report is published Defence will hold a community event to present the findings of the Report. Initial findings of the HHERA can be found in the November Investigation Update factsheet.
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.