Environmental assessment program update
The EPA has been assessing groundwater and soil vapour in Southeastern Edwardstown for historically used chemicals including trichloroethene (TCE), since 2015.
Works undertaken by environmental consultant AECOM during May and June 2016 focused on an area of approximately 1,340 properties in southeast Edwardstown and Ascot Park.
The human health risk assessment was updated on 30 June 2016.
All properties in the assessment area are considered to be safe, with predicted concentrations below 2 µg/m3 of TCE for indoor air.
In Janunary 2017, the EPA commenced additional work to delineate the extent of the contamination groundwater plume and soil vapour contamination. An additional 10 groundwater bores and 14 soil vapour bores were installed to delineate the lateral extent of TCE contamination.
As per previous EPA advice, please do not use bore water for any purpose. Mains water and water from rainwater tanks are not affected. Home grown fruit and vegetables are safe to consume, provided they are not watered with bore water.
For more information about the environmental assessment program, please contact the EPA on 1800 729 175 or via email. For any health-related enquiries, please contact SA Health on 8226 7100.
- Groundwater sampling locations, summer 2017
- Soil vapour sampling locations, summer 2017
- Soil vapour and groundwater sampling bore locations, June 2016
- Map of the assessment area
- Safe use of ground (bore) water
- Final results, 15 March 2016
- Environmental asssment program, November 2015
Letter to residents
Site assessment reports
- June 2016 | Maps | Report & App A/B | App C to G | App H to L | App M to T
- March 2016 | Report | Appendices a to h | Appendix I | Appendices j to u
- July 2015 | Report | Appendices a to f | Appendices g to l | Appendices m to s
Southeastern Edwardstown Community Working Group (CWG)
- Presentation, 12 July 2016
- Meeting notes, 10 May 2016
- Presentation, 10 May 2016
- Meeting notes, 16 March 2016
- Presentation, 16 March 2016
- Meeting notes, 23 February 2016
- Presentation, 23 Feburary 2016
- Presentation, 15 December 2015
- Presentation, 24 November 2015
- Terms of reference
The EPA established the Southeastern Edwardstown Community Working Group (CWG) as one of its key stakeholder engagement initiatives, to provide strategic interaction and information sharing with the community throughout the assessment program.
The CWG was formed in November 2015 and comprises a number of community members who are actively representing local communities and other key stakeholders. The focus and content of meetings are regularly refined to suit the assessment stages and to enable members to become a link for accurate information between the EPA and their local communities. Meeting notes, copies of the presentations and further information are available.
Contamination from trichloroethene (TCE) on two industrial sites has been identified through a previous testing program undertaken by the site owner. At the time, the EPA worked with the owner to determine appropriate next steps.
TCE is an industrial chemical used widely as a metal cleaner and degreaser. In the past, TCE was used in many applications including dry cleaning, extracting caffeine from coffee beans to make decaffeinated coffee and as an anaesthetic.
The purpose of the assessment program was to understand the nature and extent of groundwater and soil vapour contamination as a result of former industrial activities at two properties on Arabrie and Erudina Avenues, Edwardstown. These works have and continue to be managed by the EPA, as part of its role as South Australia’s environmental regulator.
Site contamination consultant, Greencap, drilled, installed and sampled a number of groundwater wells and soil vapour bores in the southeastern Edwardstown assessment area. The soil vapour testing assists in understanding whether any contamination is moving through the soil in a gas form.
Preliminary data from this work has shown evidence of the chemicals trichloroethene (TCE) and tetrachloroethene (PCE) in groundwater and soil vapour at several locations within the assessment area.
The data has only been subject to preliminary review and to understand any potential health impacts, further assessment work was necessary to better understand the environmental conditions in the area. The factual report containing a summary of the environmental assessment works is currently available.
The EPA will continue to work with the local community throughout all assessment works in the area. Residents and businesses within the assessment area will be notified of the results as they become available and all reports produced will be available online.