South Australia’s Environment Protection Authority

Southeastern Edwardstown Community Working Group

Tuesday 10 May 2016

Welcome and introductions

Rachel Hudson

Principal Adviser, Community Engagement

Agenda

1. Welcome and introductions

2. Review of last meeting notes

3. Design and scope of new works

4. How to improve air quality in your home

5. Questions

6. Next meeting proposed for Tuesday 12 July 2016

2. Review of past meeting notes

The environmental assessment program determined whether vapour intrusion was likely to be occurring at properties within the assessment area.

The highest predicted indoor air level was reported as 3.4

µg/m3 (micrograms of TCE per cubic metre of indoor air).

This falls at the lower end of the ‘Investigation’ response

range.

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TCE indoor air level response range

Indoor Air Level: Indoor Air Level: Indoor Air Level: Indoor Air Level: Indoor Air Level:

Above detection – Nothing detected 2 - <20 µg/m3 20 - <200 µg/m3 200+ µg/m3

less than 2 µg/m3

No immediate There may be a There is a health Safe Safe health concerns health risk risk

2. Review of past meeting notes

The report found that soil vapour contamination is likely to be coming from contaminated groundwater.

The soil vapour results identified another potential source

area, located to the north-east of the EPA assessment

area at the Railway Tce/Adelaide Tce boundary.

The full nature and extent of the groundwater plume and

soil vapour contamination was not able to be delineated

by the results from the last round of assessments.

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3. Design and scope of new works

Dale McGill

A/Principal Adviser, Site Contamination

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Figure 1: South-Eastern Edwardstown

Assessment Area

Residenttal Commercial. ndustry or vacant

Education Public instituton

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ASCOT PARK

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._.Ass•ssment Area • • • EPAA~s_~ssrrentJ..rea • ..Apri 2016

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3. Design and scope of new works

Twenty groundwater bores and

twenty soil vapour testing

bores are in the process of

being installed in Edwardstown

and Ascot Park.

Bores are being installed in the

west of the assessment area

across train line, and in the

north east to more accurately

define the potential source of

contamination.

South Australia's Environment Protection Authority

Figure 2: South-Eastern Edwardstown

Assessment Area

CIExis1ing EPA Assessment Area

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Figure 3: South-Eastern Edwardstown

Assessment Area

CIExisting EPA Assessment Area

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3. Design and scope of new works

Bore installation is

commencing this week and

continuing through until late

May 2016.

The next report, including

data, an updated conceptual

site model and revised risk

assessment is expected in late

June 2016.

4. SA Health

Dr Ian Delaere

Manager – Toxicology

5. Questions

What do the TCE predictions mean for pregnant women both

working or living in South Eastern Edwardstown (at the locations

where the predictions are highest?).

Any other questions?

Thank you and next meeting

Next meeting is proposed for Tuesday 12 July 2016, after the report has been submitted and reviewed by the EPA.