Central Edwardstown (formerly Southern Edwardstown)
Assessment works by Bridgestone
Intrusive environmental assessments undertaken in relation to a former automotive components facility jointly owned by Bridgestone Australia Ltd and Toyoda Gosei Ltd, identified soil and groundwater contamination in 1997 by environmental consultants engaged at the site.
At that time the EPA was notified of environmental contamination and the proposed plan for assessment and remediation.
Due to the historical manufacture of polyether and polyurethane products on site, chemicals of concern such as solvents, chlorinated hydrocarbons, petroleum hydrocarbons and other contaminants have entered the environment and impacted the soil and groundwater.
Bridgestone Australia Ltd has previously undertaken extensive assessment and remediation works associated with the contamination and bore owners, in the immediate vicinity of the site, have been advised not to use their bore water until further notice.
On-site and off-site investigations are ongoing and Bridgestone Australia Ltd have engaged a site contamination auditor to complete an audit to determine the nature and extent of site contamination and to determine what remediation is necessary for the site. On completion, the site contamination audit report will be submitted to the EPA. The area now under investigation is bounded by East Terrace, Ascot Parkt to the west, Oval Avenue and Flinders Street, Edwardstown to the north, Wheaton Road, Melrose Park to the east and Weaver Street, Edwardstown to the south.
Technical reports on this investigation are available on the EPA's Public Register. For information on how you can view or obtain a copy, click here.
Letters to residents
- Map of area under investigation, 7 July 2011
- Media release, 7 July 2011
Frequently asked questions
How did the EPA become aware of the contamination in Central Edwardstown?
The groundwater contamination in the area of Central Edwardstown is likely to be associated with known contamination arising from the former automotive components facility at Edwardstown, first identified in the 1990s.
Bridgestone Australia Ltd has undertaken extensive assessment and remediation works of this contamination and has previously notified the public of the contaminated groundwater, tested private bores in the nearby area and advised bore owners not to use their bore water until further notice. Since the completion of the remediation works, Bridgestone Australia Ltd have carried out ongoing groundwater monitoring and provided the results to the EPA.
What are the chemicals of concern?
The EPA has been aware of this contamination since 1997 and it is likely that the contamination is associated with leakages and spills which occurred since the 1940s associated with operations at the former Bridgestone facility.
TCE (trichloroethene) is a common industrial solvent and was used widely as a degreaser and metal cleaner. DCE (dichloroethene) is generally present as the result of the degradation and breakdown of TCE.
For more information on the chemicals of concern, please refer to the SA Health information on Chlorinated solvents in groundwater .
Can I use bore water?
Work to date has confirmed that the groundwater (bore water) in this assessment area is contaminated and should not be used for any purpose. Mains water and water from rainwater tanks are not affected by this contamination and home grown fruit and vegetables are safe to consume, provided they are not being watered with contaminated bore water.
Is there a soil vapour issue associated with the contamination arising from contaminated groundwater?
As part of the EPA assessment process in the area, the risk of vapour entering homes and buildings has been investigated. An independent contractor has predicted all of the 420 properties in the assessment area to be at the 'safe level within the indoor air level response range for TCE. ie less than 2µg/m3. Additional works will be undertaken in the coming months to determine the extent of the groundwater contamination, which will inform the EPA as to where a groundwater prohibition area may need to be established.
For further information on health-related queries, please contact SA Health on 8226 7100.
For site contamination related enquiries, please contact the EPA during office hours on 1800 729 175.