Environmental Investigation

Key points.

  • Testing both on the Holden site and at neighbouring properties has indicated no unacceptable health risk to residents or Holden’s employees.
  • TCE and PCE are present in groundwater at low concentrations (no imminent risks).
  • Groundwater is approx.18-20 metres below the ground surface, with clay soils above, therefore reducing vapour migration to the surface compared with sites with shallow groundwater.

(To enlarge, click on the image)

(To enlarge, click on the image)

  • Industrial activities on nearby properties have resulted in co-mingled plumes of chlorinated solvents in groundwater.
  • Soil contamination is highly localised to very specific, small locations on site.
  • The majority of the site is free of significant soil contamination.

Routine environmental investigations have been underway at the Holden Elizabeth site since 1999.

Environmental background

In 2011, groundwater contaminated with Trichloroethene (TCE) and Tetrachloroethene (PCE) was discovered at a depth of 18-20 metres beneath the Elizabeth manufacturing site and Holden notified the Environmental Protection Authority (EPA) of this finding.

Since that time, an ongoing and thorough environmental investigation program has taken place to assess TCE and PCE as well as other chemicals associated with vehicle manufacturing.

While other chemicals have been found, they are small in number and their impacts are highly localised (restricted to small areas).

Currently, there is no identified health risk to residents or anyone working at the Holden site.

We continue to work closely with the Environment Protection Authority (EPA) in South Australia, which regulates environmental investigations. Holden has also engaged an EPA-accredited independent site contamination auditor and the environmental investigation process we have voluntarily initiated is regulated by the EPA.

Visit the EPA South Australian website to learn more about our Voluntary Investigation agreement.