estimating costs for remediation of development sites.
Internally, we also offer guidance and direction on environmental communications with input into risk management strategies, community engagement and media responses.
Tonsley Village Environmental Management
As with any residential development on land that was not previously zoned residential land, Renewal SA has undertaken an environmental site contamination audit ahead of Peet Limited commencing development of Tonsley Village. The audit confirmed that the site is suitable for the residential development.
This environmental audit also requires ongoing monitoring of the environmental conditions to ensure there are no unexpected changes. Renewal SA’s continued commitment under this environmental audit including regular testing of ground water and soil vapour is currently undertaken every six months in accordance with the Auditor-endorsed Environmental Management Plan (EMP).
The latest October 2019 test results concluded that no additional actions are considered necessary and the risk profile has not changed.
Clovelly Park and Mitchell Park Environmental Management Project – Phase 2
In 2015 Renewal SA entered into a Voluntary Site Contamination Assessment Proposal with the Environmental Protection Authority and has now completed environmental investigations in Clovelly Park and Mitchell Park.
Renewal SA entered into this Voluntary Site Contamination Assessment Proposal with the Environment Protection Authority (EPA) to carry out further investigations in the areas of Clovelly Park and Mitchell Park to determine the nature and extent of soil and groundwater contamination.
These investigations – Phase 2 – built upon those undertaken by the EPA in 2014, which indicated that further testing and assessment work was necessary to understand whether the groundwater plume extended north of Alawoona Avenue in Mitchell Park.
Phase 2 involved a series of investigations through 2015–2018 to:
provide additional information in relation to environmental conditions in the area;
assist with delineation of groundwater contamination north of Alawoona Avenue in Mitchell Park;
find the north-western extent of the groundwater contamination in the Mitchell Park/Marion area; and
confirm that the contamination previously reported in this area had not changed, while better defining the extent of the contamination.
The investigations have also involved:
the installation of several new groundwater wells in Mitchell Park and Marion, to assist in better defining the north western extent of the groundwater contamination;
a risk assessment in slab on ground and crawl space homes from vapour potentially rising up through the soil from groundwater – which did not identify any health risk to residents; and
a basement survey in targeted areas of Mitchell Park with no basements identified, thus confirming the earlier assessment of risk.
Interim Audit Advice was produced by the independent Site Contamination Auditor confirming that groundwater contamination in the area has been delineated. The auditor also concluded that the risks to residents in the notification area do not exceed the acceptable levels set by the EPA. The auditor agrees with earlier advice to the community not to use bore water for any purpose.
The Site Contamination Audit has now been completed with the audit statement and report submitted to the EPA in April 2020.
The conclusions of the audit confirm those of the Interim Audit Advice and no further work is planned by Renewal SA.