Project summary
iEnvi was engaged to prepare a Preliminary Site Investigation (PSI) and a site‑specific Operational Environmental Management Plan (OEMP) to support a development application for converting a site in south‑west Brisbane to an automotive wrecking and stripping yard. The site inspection identified scattered oil and fuel drips on surface soils. Based on the consultant assessment, the overall site risk was considered low to moderate and manageable through pragmatic operational controls rather than a large soil‑sampling program.
This was a low risk site, that had minor contamination from wrecking in soil, typical of wreckers. Instead of a large soil sampling plan, based on the site risk, we focussed on prevention through management changes and an operational environmental management plan, and processes for safely managed oil and petrol stained surface soil. – Michael Nicholls
What we did
- Conducted a Preliminary Site Investigation (PSI) including a site history interview and a focused visual inspection by an experienced environmental consultant.
- Assessed the nature and extent of visible hydrocarbon staining and reviewed likely receptor pathways given local soils and site layout.
- Prepared a practical, site‑specific OEMP that sets out responsibilities, operational controls and actions for current and planned activities.
- Recommended periodic review (an annual environmental audit was advised) to confirm controls remain effective and that the site stays compliant with legislative obligations.
Key findings and risk approach
The PSI identified scattered areas of oil and petrol staining on surface soils consistent with wrecking activities. The consultant judged the site to be low–moderate risk overall because:
- staining was limited and largely on surface soils,
- local soil and geological conditions reduced immediate receptor exposure pathways, and
- most metal processing activity was proposed to be undertaken off‑site, limiting on‑site operational intensity.
Given those factors, iEnvi applied a risk‑based approach: practical operational controls in an OEMP were used to prevent contaminant migration and manage small areas of impacted soil, rather than immediately commissioning an extensive soil sampling program.
OEMP highlights — practical controls
- Site rules for vehicle maintenance and stripping areas to minimise spills and drips.
- Use of drip trays and bunded work areas where stripping or fluid removal occurs.
- Spill response procedure and readily available spill kits.
- Stormwater and drainage controls to prevent runoff of hydrocarbons to stormwater systems.
- Waste handling and segregation, and obligations for disposal of hydrocarbon‑impacted soil or liquid wastes.
- Staff training, roles and reporting lines to ensure controls are implemented and maintained.
- Record keeping and a proposed annual environmental audit to verify ongoing compliance and trigger additional investigation if operational changes or evidence of migration occur.
Compliance and regulatory context (Queensland)
Risk‑based site assessment and management should be consistent with the National Environment Protection (Assessment of Site Contamination) Measure (ASC NEPM) and Queensland Environment guidance. Where investigations identify contamination that may pose an unacceptable risk to human health or the environment, further assessment, remediation or notification to the regulator may be required. Queensland authorities also manage disposal permits for contaminated soil and maintain land registers where formal site management is necessary.
Practical takeaways for developers and buyers
- A focused PSI plus a tailored OEMP can be a cost‑effective route to manage low to moderate contamination risks and support a development application.
- Use a risk‑based decision process: targeted sampling is still appropriate where visual evidence, site history or receptors suggest higher risk.
- Operational controls (drip trays, bunding, spill kits, staff training) reduce the chance of contaminant migration and can avoid unnecessary soil excavation and disposal costs.
- Include an annual audit or review clause in the OEMP to provide confidence for authorities, financiers and purchasers that controls remain effective as the business operates and changes.
Need help with a wreckers site, PSI or OEMP?
iEnvi prepares proportional Preliminary Site Investigations and Operational Environmental Management Plans for automotive recyclers and other industrial sites. For practical, compliance‑focused advice call us on 13000 43684 or visit our contact page.