FAQs

This project is being delivered by Australian Gas Networks (AGN) to address legacy contamination from a former gasworks site. The aim is to remove impacted soil and ensure the site meets current environmental standards

The former gasworks is located in Rosewater, bordered by Alice, Henry and Rosetta Streets, Rosewater

The site includes a strata-titled unit complex and five individual residential properties.

The process includes:

• Excavating contaminated soil
• Transporting it to a licensed facility for treatment
• Backfilling with clean soil
• Reinstating surfaces

EPA approvals have been received for stage one works. AGN is preparing for on-site works. Once complete, lessons learned from stage one will be implemented, and documentation will be prepared and submitted for other stages will follow.

Properties will be reinstated and subject to an Environmental Audit to confirm that the properties continue to be safe residential use. EPA-endorsed Site Management Plans will be registered on property titles as part of compliance.

Works at stage 1 are expected to begin in July 2026

Standard hours: Monday to Friday, 7am-6pm.
Occasional weekend work may occur when required

Stage 1 is expected to take 3–4 weeks. Later stages are expected to be longer due to the area of land being remediated. We will communicate timeframes once more information becomes available.

Environmental site assessments included soil, groundwater, and vapour sampling under an EPA-endorsed Voluntary Site Contamination Assessment Plan (VSCAP).

• SA EPA (regulatory oversight)
• Independent EPA-accredited site auditor (GHD)
• AECOM (consulting & remediation management)
• TSA Riley (community engagement support)

From 1866–1922 the site was used as a gasworks facility where coal was converted into gas. Operations like these often leave behind by-products such as coal tar and ash which can be left in the soil long after the site ceases to operate.

• PAHs (polycyclic aromatic hydrocarbons)
• BTEX compounds (benzene, toluene, etc.)
• Heavy metals
• Coal tar

Groundwater has been assessed, and risks have been determined to be low.

The former gasworks operations left behind contaminated soil. Remediation is

being undertaken to meet current environmental regulations and ensure the land remains safe for residential use.

• Excavation of contaminated soil
• Odour and dust control
• Transport of waste to licensed facilities
• Site reinstatement and validation

It will be sent to EPA-licensed disposal or treatment facilities, depending on the contaminant type and classification.

During excavation you may notice temporary dust or odour. This is expected for this type of work. Dust and odour will be continuously monitored and managed to minimise impacts.

We use continuous air quality monitoring, water misters, odour-neutralising chemicals, and covered truck loads. Work may pause if thresholds are exceeded to protect community wellbeing.

The works will be carefully managed to minimise impacts on residents and the surrounding community. Measures include:

• Dust suppression (such as water misting)
• Odour management during excavation
• Continuous air quality monitoring
• Secure fencing and safety signage

The works are carried out in accordance with a Site Management Plan and are overseen by the EPA and an EPA-accredited Site Contamination Auditor.

Health risks are considered low under current use. However, to ensure future safety, remediation is required. Air and dust will be closely monitored during works.

You may see/hear/smell activity such as truck movements, excavation machinery, and occasional odour. We will notify you of high-impact workdays.

 Contractors follow strict environmental incident protocols. The site auditor and EPA will also be informed if an incident occurs. We are committed to keeping the community informed and will follow strict emergency procedures. You will be notified in the event of an emergency which may impact you or your property.

Air quality monitoring will be conducted at the site boundary and

within the community using:

• Real-time dust and vapour monitoring at fixed locations.

• Odour and vapour monitoring by qualified personnel during high-risk activities.

• Visual inspections and community feedback.

Monitoring results will be reviewed regularly, and any exceedances will trigger an immediate investigation and response.

Remediation will occur in small, carefully managed stages to reduce disruption and prevent off-site impacts.

Key controls include:

• Dust and odour suppression using water misting sprays on active work areas and stockpiles.

• Covering of stockpiles and loads to prevent dust and odour escape during transport.

• Minimising open excavation by covering or backfilling disturbed areas promptly.

• Work stoppage protocols if odour or dust exceeds trigger levels.

Occasional unpleasant odours during the works are expected. We will be monitoring air-quality closely but if you’re concerned, please contact the project team to discuss further.

Residents may experience:

• Occasional odour, particularly during excavation of deeper fill layers.

• Increased construction activity including trucks and excavation equipment.

• Light noise during standard working hours.

• Water misting used for dust and odour suppression.

• Site signage and traffic controls.

• SMS or email updates
• Door-knocks
• Letterbox notifications
• Factsheets and newsletters
• A project website

 Temporary relocation may be required for some properties where remediation works are taking place.

If relocation is necessary, the affected property owners and residents will be contacted directly to discuss arrangements. If you have not been contacted about relocation, your property is not currently identified as requiring this measure.

 Please contact us directly:

• community.engagement@agig.com.au
• Katherine Simmons (AGN): 0430 713 356
• Andrea Murphy (TSA Riley): 0432 254 094

A Communications and Engagement Plan has been developed. It includes pre-remediation communication, real-time updates, and a complaints handling protocol.