Answers to Frequently Asked Questions (FAQs) regarding the PFAS Investigation and Management Program are available below. As the investigations progress, FAQs will be added and updated.
Defence is undertaking a long term detailed site investigation of HMAS Stirling and surrounding areas to understand the extent and levels of per- and poly-fluoroalkyl substances (PFAS) including perfluorooctane sulfonate (PFOS), perfluorohexane sulfonate (PFHxS), perfluorooctanoic acid (PFOA) on, or in the vicinity of the base. Please refer to the Summary of the Investigation page on this website for more information.
The detailed environmental investigation will involve:
Sampling of the Garden Island nearshore environment will be undertaken as part of the extensive investigations.
In addition, testing for PFOS and PFOA was added to the 2016/17 summer water quality monitoring program for Cockburn Sound, which is annually coordinated by the Cockburn Sound Management Council from December to March.
The requirement for testing of any Garden Island nearshore marine life has yet to be determined.
Testing for PFOS and PFOA was added to the 2016/17 summer water quality monitoring program for Cockburn Sound, which is annually coordinated by the Cockburn Sound Management Council from December to March. Based on the results of this sampling, there is no evidence that PFAS contamination identified at HMAS Stirling has impacted water quality in Cockburn Sound. Further information is available on the Department of Water and Environmental Regulation PFAS Factsheet:
Current evidence suggests that there is no requirement for testing of PFAS on the mainland.
As part of the extensive investigations, bores will be sunk in and around the beaches, and around the high-water mark of Garden Island.
The Department of Fisheries Investigations have confirmed that the November 2015 Cockburn Sound fish deaths were likely caused by a bloom of microscopic algae. Contributing factors to algal blooms include elevated nutrients, water temperatures and reduced flushing.
The Department of Water and Environmental Regulation also conducted investigations into all reports of potential pollution or industrial causes of the fish kill. No potential pollution sources were identified.
Further details regarding the investigation are available at the following link:
Yes. Potable water for Garden Island is supplied from the Rockingham town water supply. Bore water is not used for domestic purposes on Garden Island.
Site investigations will be carried out with minimal impact on the environment, and there will be no impact to nearby housing as the investigation will focus on Garden Island. Prior to work starting, Defence will provide information on any potential impacts to those that may be affected by the work.
Some site investigations will require the use of a drilling machine. This machine will produce some noise. Mitigation measures will be adopted to ensure minimal impacts to Defence personnel.
Geosyntec Consultants Pty Ltd has been engaged to conduct a peer-review/audit function on the detailed environmental investigation. All site investigation reports produced as part of the investigation will be reviewed by Geosyntec. The reports will also be sent to a number of relevant Government agencies for comment.
The investigation started in May 2017, with sampling commencing in July 2017. Investigations will take approximately 12 months to complete. Throughout the investigation, Defence will continue to engage with stakeholders and the community to provide updates.
Once the detailed environmental investigation is finished, reports will be finalised and publicly released. Defence will engage with the local community including residents, business and other local stakeholders on the results.
Per- and poly-fluoroalkyl substances (PFAS) are a group of man-made compounds that have been used for various applications around the world since the 1950’s, including Australia.
PFAS are stable chemical compounds that do not break down in the environment. They remain in the environment, on properties and in trace amounts in humans for a long time.
PFAS have typically been used to make coatings and products that resist heat, oil, stains, water and grease across Australia and around the world. The image below shows some products that commonly contain PFAS.
Common household products and specialty applications where PFAS may be present include: the manufacture of non-stick cookware; fabric, furniture and carpet stain protection applications; food packaging; and in some industrial processes.
Visit the "What is PFAS?" page for more information.
Aqueous Film Forming Foam (AFFF) has been used in Australia and worldwide for many years to assist with fire training drills and emergency/disaster event training by government and private sector organisations. This includes Defence military base locations, civilian aerodromes and industrial facilities around Australia.
AFFF is the most effective firefighting medium for liquid fuel fires to ensure human safety in emergency situations. AFFF acts quickly to smother fuel, preventing contact with oxygen by adding a thin film of foam over the fire.
The detection of PFAS from the previous use of AFFF products is a national and international matter that is not unique to Defence.
From 2004, Defence commenced phasing out its use of legacy firefighting foams containing perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) as active ingredients. Defence now uses a more environmentally safe firefighting product called Ansulite. Ansulite does not contain PFOS and PFOA as active ingredients, only in trace amounts.
Ansulite is used by Defence only in emergency situations where human life is at risk, or in controlled environments to test equipment.
Any Ansulite used by Defence is captured and treated and/or disposed of at licensed waste disposal facilities, in accordance with best-practice regulations, and standards.
Defence-owned facilities have been upgraded, where firefighting foams are used, to create closed systems. Closed systems are designed to capture spent firefighting foam and minimise the risk of firefighting foam being released into the environment.
Defence cannot provide health advice as this is the role of respective State and/or local health authorities and practitioners. Defence’s position on health issues relating to PFAS aligns with the enHealth guidance statements as outlined by the Australian Government Department of Health.
According to the Environmental Health Standing Committee (enHealth) Guidance Statements on per- and poly-fluoroalkyl substances, released in June 2016, there is currently no consistent evidence that exposure to these PFAS causes adverse human health effects.
However, because PFAS compounds persist in humans and the environment, enHealth recommends that human exposure is minimised as a precaution.
Most people living in the developed world will have levels of PFAS in their body, as these compounds have been used in common household and industrial applications. The most common pathway is believed to be ingestion from PFAS contaminated food and drink.
Fact sheets and further information on the effects of PFAS on your health are available on the Department of Health Website.
If required, Defence will cooperate with State and Territory Governments to undertake human health and ecological risk assessments. These human health and ecological risk assessments test PFAS levels in animals and plants that are part of the human food chain, as well as some that are not.
The Department of Health is administering a voluntary blood testing program for those who have lived or worked in the Williamtown, NSW and Oakey, Queensland Investigation Areas. Where individual consent is given, the PFAS voluntary blood test results may be used as part of the epidemiological study. On 3 December 2017 the Australian Government announced that it will expand the voluntary blood testing program and epidemiological study to Katherine NT in early 2018.
More information on the Blood Testing Program can be found here.
Several organisations are undertaking environmental investigations into PFAS within their area of responsibility. In addition to Defence these include water service providers, State Environmental Protection Authorities and Airservices.
To see a list of all Defence PFAS Investigation and Management sites click here.
The detailed environmental investigations involve:
The Commonwealth Department of Health released the final Health Based Guidance Values (HBGV) for PFAS on 3 April 2017. These HBGVs were developed by Food Standards Australia and New Zealand (FSANZ), at the request of the Department of Health.
The HBGVs for PFAS are a precautionary measure to assist people, investigating agencies and affected communities in minimising their exposure to PFAS. Specifically, these final values will be utilised by Defence to assess risk and take further action as necessary.
For more information visit the Department of Health HBGV web page. The Department of Environment and Energy has published a National Environmental Management Plan that includes screening levels for PFAS in soil. These screening levels are derived using standard calculation methods described in the National Environment Protection (Assessment of Site Contamination) Measure.
The National Environmental Management Plan is available on the EPA Victoria website.
Requests from organisations and individuals for samples of contaminated soil and water should be sent to PFAS.Coordination@Defence.gov.au for review and consideration.
When a laboratory tests a sample for PFAS the result may be below the limit of reporting (<LOR). This either means that there is no PFAS in the sample or the amount of PFAS is too small for the laboratory to measure with any degree of certainty.
The limit of reporting is well below all health based guidance values and screening criteria. There is no need to change the way you use water, soil, plants or animals that have been tested and returned a result below the limit of reporting.
The Environmental Health Standing Committee of the Australian Health Protection Principal Committee (enHealth) advises that there is currently no consistent evidence that exposure to PFAS causes adverse human health effects.
However, because PFAS chemicals persist in humans and the environment, enHealth recommends that human exposure to PFAS chemicals should be minimised as a precaution. Defence adopts a precautionary approach and will assess eligible household’s drinking water requirements on a case-by-case basis.
If PFOS, PFHxS or PFOA are detected in your bore or tank water and you have no alternative drinking water source, the Project team will discuss possible management strategies and alternative water supplies with you.
As a precaution - and irrespective of any actual measured concentrations in bore and/or tank water - Defence will consider supplying eligible residents, within the investigation area with an alternative water supply for drinking and domestic use.
Further information about managing tank water can be found on the Guidance on use of rain water tanks.
Households within the defined Investigation Areas, that do not have a town water connection and drink bore water (directly or via rainwater tanks), are welcome to contact the Project Teams to discuss possible management strategies. These may include:
While Defence is aware that certain domestic filters claim to reduce PFAS levels in water, Defence cannot advise on the effectiveness of these filters. The purchase and maintenance of domestic filters is at the discretion of residents.
If your property is selected for testing as part of the investigation, you will receive a letter and consent form seeking permission to sample your property. You will be requested to contact the Project team to arrange a suitable date and time.
Not every property in the investigation area needs to be tested to estimate the extent of PFAS in the investigation area. If you would like to have your property tested you can ask the Project team. You will be asked to complete a Water Use Survey to assess your eligibility. Priority is generally given to properties within the investigation area and where residents use bore water for drinking.
Residential bores, extraction bores and tanks are sampled to measure water quality (with respect to PFAS) at the point it is used. The first flush sampling method is used to understand the quality of water that comes out of the bore or tank when the tap or pump is turned on.
If targeted PFAS compounds have accumulated in pipe work and are released into water during the first flush, the sample will include them.
The following steps are undertaken when using the first flush sampling method. These steps follow strict procedures, consistent with relevant Australian standards to ensure data integrity:
The best management activities for investigation sites are determined by site-specific factors such as the site’s hydrogeology, the nature and extent of PFAS detections and access to the site.
The detailed site investigation assists in determining the most appropriate management strategies for a particular site.
Visit the Management Activities page for further information on what management activities Defence is currently undertaking.
Defence will regularly update the investigation site community during the investigation. Updates will be delivered through community information sessions, advice from the Project team, factsheets and the website, including these FAQs.
For more information please contact the Defence environmental investigation Project team.
Individual claims for compensation will be considered on a case by case basis. How to make a claim is outlined on the PFAS financial claims page.
Note that Defence cannot advise landholders, property owners and residents about legal representation or conditions offered by legal representatives.