The active service station on the corner of Diagonal road and Brighton Road.

Hi Steven, The City of Holdfast Bay have provided the following information regarding bore water usage: • The Glenelg Oval used 20900 Kl of bore water and 1964 kl of mains water in the 12 month period dated September 2017 to September 2018. Council uses bore water to irrigate the outfield and spectator mounds (approx 2.1 ha) and mains water to irrigate the Centre wickets and practise wickets Representatives from the City of Charles Sturt have informed us that: • Woodville oval bore use was 20,964Kl during the period 1st September 2017 through to 2nd May 2018. I hope that this has addressed your question and invite you to please contact other councils directly if you require more information.

It would be benefit the community if we all had access to the same information. If the bore in Glenelg Oval is over 100 metres deep, I should be able to look that up in some publicly available register. If we had a vertically scaled diagram that showed the 'clay membrane' that separates the two aquifers so we could see how thick it is. We would be less anxious about the possibility of seepage between the aquifers if the diagrams and the information was better. After all, the water in the tertiary aquifer is a public resource and who is using it and how much is being used should be publicly available. The organisations and the people using bore water are accessing a public asset and have a moral and ethical responsibility to use it wisely for future generations. The pressure of the bore water from the tertiary aquifer should be monitored regularly to be pre warned about possible future problems.

The school across the road from this petrol station does not access bore water. They do however use the Glenelg Football Club Oval which has a bore which is drilled to a depth of 106 meters - so it will not be impacted by the contamination or the GPA. Under the shallow contaminated aquifers, there are massive deep aquifers within Tertiary sediments. These are often the ones that are used by the schools, councils and some industries for irrigation and manufacturing processes. These aquifers are protected from infiltration of the contaminated aquifer above by a thick confining clay layer that sits above these deep aquifers. The EPA understands that the tanks at the service station were replaced in 1992. Based on the historical and recent groundwater monitoring data received by the EPA there are no indications that any of the existing underground fuel infrastructure (including tanks) are actively leaking. The EPA is aware of site contamination of groundwater beneath the site, due to a historical leak of fuel product, with the plume extent generally limited to the site and beneath Brighton Road to the west. The EPA is currently regulating the site owner in regards to the assessment and remediation of this plume.