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PFAS Investigation &
Management Program

RAAF Base Williamtown

Williamtown Management Activities


Defence is undertaking a range of precautionary management activities in Williamtown. The aim of these activities is to remove PFAS from the environment and limit PFAS migration pathways.

Water Management Activities


Water Assistance

Defence is providing alternative sources of drinking water, as an interim and precautionary measure, to eligible residents located within the Williamtown management area. For further information read the Drinking Water advice on the support page.



Town Water Connections

As part of a long-term and precautionary measure for the supply of drinking water, Defence is funding Hunter Water to provide access to the reticulated water supply system to residents who live within the Williamtown Management Area. For further information, read the Hunter Water Connections advice on the support page or download the factsheet here.

Water Treatment Plants

Defence is operating multiple water treatment plants at RAAF Base Williamtown to remove PFAS from the Base and the surrounding area. Click on the tabs below for further information.

How do the plants work?

Emerging Compounds Treatment Technologies

Moors Drain | Former Fire Training Area | Southern Area

Synergy Resource Management

Lake Cochran

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Lake
Cochran

The Lake Cochran water treatment plant 

In operation since January 2017, the Lake Cochran water treatment plant is an interim measure to reduce the concentration of PFAS in water leaving Lake Cochran.

The plant combines various water treatment techniques consecutively to create a multi-barrier treatment process. Each of these techniques have been individually proven to reduce PFAS concentrations and by combining them, the Lake Cochran plant is able to reduce PFAS concentrations to below the levels of the adopted screening criteria.

The Lake Cochran water treatment plant was developed by Synergy Resource Management. Further information about the treatment technology is available on the Synergy Resource Management website.

The plant will continue to operate while a long-term solution for Lake Cochran is developed and implemented. Defence is working with industry to identify feasible options to manage or remediate Lake Cochran, this feasibly work is due to be completed in 2019.

2019 Water Sampling Results

The Water Sampling Summaries track the PFAS concentrations against the limits defined by the relevant adopted drinking water screening criteria. They include results for perfluorooctanoic acid (PFOA), 6:2 fluorotelomer sulfonic acid (6:2 FTS) and the sum of perfluorooctane sulfonic acid (PFOS) and perfluorohexane sulfonic acid (PFHxS).

The water quality data is drawn from water samples on both untreated and treated water. The summaries of water sampling results can be downloaded below.

2018 Water Sampling Results

The Water Sampling Summaries track the PFAS concentrations against the limits defined by the relevant adopted drinking water screening criteria. They include results for perfluorooctanoic acid (PFOA), 6:2 fluorotelomer sulfonic acid (6:2 FTS) and the sum of perfluorooctane sulfonic acid (PFOS) and perfluorohexane sulfonic acid (PFHxS).

The water quality data is drawn from water samples on both untreated and treated water. The summaries of water sampling results can be downloaded below.

2016/17 Water Sampling Results

The Water Sampling Summaries track the PFAS concentrations against the limits defined by the relevant adopted drinking water screening criteria. They include results for perfluorooctanoic acid (PFOA), 6:2 fluorotelomer sulfonic acid (6:2 FTS) and the sum of perfluorooctane sulfonic acid (PFOS) and perfluorohexane sulfonic acid (PFHxS).

The water quality data is drawn from water samples on both untreated and treated water. The summaries of water sampling results can be downloaded below.


The initial report was a summary of the results from 30 November 2016 until 9 March 2017.

Former Fire
Training Area

Water Treatment Plant
Former Fire Training Area & Southern Area Water Treatment Plants

Identified as a key source area for PFAS contamination, the former fire training area, located at RAAF Base Williamtown, has had a water treatment plant operational on site since July 2018.

The plant takes PFAS contaminated groundwater from a field of 15 extraction bores, specifically placed to target PFAS from the former fire training area, and then uses successfully proven resin technology to remove PFAS from the water before distributing the treated water via a collection of sprinklers.

The plant was developed by Emerging Compounds Treatment Technologies (ECT2). More information about the treatment technology is available on the ECT2 website.

2019 Water Sampling Results

The Water Sampling Summaries track the PFAS concentrations against the limits defined by the relevant adopted drinking water screening criteria. They include results for perfluorooctanoic acid (PFOA), 6:2 fluorotelomer sulfonic acid (6:2 FTS) and the sum of perfluorooctane sulfonic acid (PFOS) and perfluorohexane sulfonic acid (PFHxS).

The water quality data is drawn from water samples on both untreated and treated water. The summaries of water sampling results can be downloaded below.

2018 Water Sampling Results

The Water Sampling Summaries track the PFAS concentrations against the limits defined by the relevant adopted drinking water screening criteria. They include results for perfluorooctanoic acid (PFOA), 6:2 fluorotelomer sulfonic acid (6:2 FTS) and the sum of perfluorooctane sulfonic acid (PFOS) and perfluorohexane sulfonic acid (PFHxS).

The water quality data is drawn from water samples on both untreated and treated water. The summaries of water sampling results can be downloaded below.

Moors
Drain

Water Treatment Plant
Moors Drain Water Treatment Plant

Defence has installed a water treatment plant to remove PFAS from water leaving the Base via Moors Drains.

The plant has been operating since June 2017 and was the first of its kind in Australia. It uses a regenerable and strong adsorbent synthetic resin with ion exchange functionality to remove PFAS from water in Moors Drain, the treated water is then discharged back into Moors Drain before it leaves the Base. In April 2018 upgrade works were completed on the plant to increase its treatment capacity from 3 litres per second to 6-8 litres per second.

The plant was developed by Emerging Compounds Treatment Technologies (ECT2). More information about the treatment technology is available on the ECT2 website.

2019 Water Sampling Results

The Water Sampling Summaries track the PFAS concentrations against the limits defined by the relevant adopted drinking water screening criteria. They include results for perfluorooctanoic acid (PFOA), 6:2 fluorotelomer sulfonic acid (6:2 FTS) and the sum of perfluorooctane sulfonic acid (PFOS) and perfluorohexane sulfonic acid (PFHxS).

The water quality data is drawn from water samples on both untreated and treated water. The summaries of water sampling results can be downloaded below.

2018 Water Sampling Results

The Water Sampling Summaries track the PFAS concentrations against the limits defined by the relevant adopted drinking water screening criteria. They include results for perfluorooctanoic acid (PFOA), 6:2 fluorotelomer sulfonic acid (6:2 FTS) and the sum of perfluorooctane sulfonic acid (PFOS) and perfluorohexane sulfonic acid (PFHxS).

The water quality data is drawn from water samples on both untreated and treated water. The summaries of water sampling results can be downloaded below.

2017 Water Sampling Results

The Water Sampling Summaries track the PFAS concentrations against the limits defined by the relevant adopted drinking water screening criteria. They include results for perfluorooctanoic acid (PFOA), 6:2 fluorotelomer sulfonic acid (6:2 FTS) and the sum of perfluorooctane sulfonic acid (PFOS) and perfluorohexane sulfonic acid (PFHxS).

The water quality data is drawn from water samples on both untreated and treated water. The summaries of water sampling results can be downloaded below.

Southern
Area

Water Treatment Plant
Southern Area Water Treatment Plant

Emerging Compounds Treatment Technology (ECT2) has been engaged to install and operate a fourth water treatment plant near the Southern Area of RAAF Base Williamtown. The plant arrived at the Base in December 2018 and the plant was commissioned in April 2019. It is presently treating water from on-base locations, and it is anticipated that it will commence to treat water from off-base by the end of 2019.

Defence is finalising off-base extraction locations to the south of Lake Cochran with a pipeline planned to carry water to the treatment plant.