Preliminary Site Investigation (Phase 1 ESA) Melbourne & Geelong
Identify environmental risk early with a thorough Phase 1 ESA from Terralis — trusted by developers, purchasers and lenders across Melbourne, Geelong and Rural Victoria.
Start Your Phase 1 ESA Today
A Preliminary Site Investigation (Phase 1 ESA) is the essential first step in understanding the environmental history and potential contamination risks of any land parcel. Terralis delivers comprehensive Phase 1 assessments across Melbourne, Geelong and regional Victoria, helping clients make informed decisions before purchase, development or financing. Our investigations align with NEPM (Assessment of Site Contamination) guidelines and EPA Victoria requirements.
Terralis conducts a thorough desktop review of historical aerial photographs, land title records, planning scheme overlays and EPA Victoria contaminated sites databases to establish a complete picture of past land use on your site. This review identifies historical activities such as industrial processing, fuel storage, waste disposal or agricultural chemical use that may have introduced contamination — forming the foundation for identifying Areas of Environmental Concern before any site visit is conducted.
Terralis performs comprehensive regulatory database searches including the EPA Victoria Environment Protection Authority site register, EPBC Act protected matters, groundwater extraction licence records, EPA notices and relevant planning overlays. These searches identify whether your site or surrounding properties are subject to existing regulatory obligations, contamination notices or environmental audit requirements — critical information for property purchasers, developers and lenders conducting due diligence across Melbourne and Geelong.
Following the desktop review, Terralis conducts a detailed site reconnaissance inspection to observe current site conditions firsthand. Our assessors record building materials, drainage patterns, surface staining, odours, stressed vegetation, chemical storage areas and any visible evidence of contamination or hazardous materials. This walkover is conducted systematically across all accessible areas of the site, with photographs and field notes forming part of the Phase 1 ESA documentation submitted to EPA Victoria and planning authorities.
Terralis conducts structured interviews with current and former site owners, occupiers, managers and neighbouring property holders to capture historical knowledge that does not appear in public records or database searches. These interviews often reveal past activities — such as on-site waste burning, chemical disposal, underground tank installations or historical fill events — that are critical to understanding contamination risk and identifying Areas of Environmental Concern on Melbourne and Geelong properties.
Areas of Environmental Concern
Based on the desktop review, database searches, site inspection and stakeholder interviews, Terralis formally identifies and maps Areas of Environmental Concern (AECs) — discrete areas of the site where historical activities or observed conditions indicate a plausible contamination pathway. Each AEC is documented with a description of the activity of concern, the likely contaminants, the potential exposure pathways and the receptors at risk, providing a structured basis for risk classification and further investigation recommendations.
Contamination Risk Classification
Terralis provides a clear, documented contamination risk classification — low, medium or high — for the site as a whole and for individual AECs identified during the assessment. This classification is supported by a transparent rationale that references the specific historical activities, observed conditions and regulatory context that informed the determination. The risk classification is a critical output for property purchasers, development financiers, conveyancers and planning authorities across Melbourne and Geelong.
Phase 1 ESA Report
Terralis prepares a detailed, NEPM-compliant Phase 1 ESA report that documents the desktop review, regulatory searches, site inspection findings, stakeholder interview outcomes and risk classification in a clear, well-structured format. Our reports are consistently accepted by EPA Victoria, lending institutions, planning authorities and EPA-accredited auditors across Melbourne and Geelong. The report is prepared by qualified environmental scientists and reviewed to ensure it meets current regulatory standards before delivery to the client.
The Phase 1 ESA report concludes with clear, actionable recommendations tailored to the site's risk classification and intended land use. Where a Phase 2 Detailed Site Investigation is recommended, Terralis provides specific scoping guidance identifying the AECs to be investigated, the appropriate sampling methods, the analytical suite required and indicative cost ranges — enabling clients to plan and budget for the next step with confidence before committing to further expenditure.
Frequently Asked Questions
Get answers to common questions about our environmental services and approach.
A Phase 1 ESA is a non-intrusive environmental site assessment that reviews historical land use to identify potential contamination risks. It is typically required before property purchase, development approval, or securing finance for commercial and industrial land in Melbourne and Geelong. Lenders, developers and EPA Victoria regulators commonly require a current Phase 1 ESA as part of due diligence.
Most Phase 1 ESAs are completed within 5–10 business days from site access, depending on the complexity of the site history and availability of records. Terralis offers expedited turnaround for time-sensitive transactions across Melbourne and Geelong — contact us to discuss your timeline.
No — a Phase 1 ESA is entirely non-intrusive. It relies on desktop research, database searches and a site walkover rather than physical sampling. If contamination risk is identified, a Phase 2 Detailed Site Investigation involving sampling would be recommended as the next step.
Our Phase 1 investigations are conducted in accordance with the National Environment Protection (Assessment of Site Contamination) Measure (NEPM), EPA Victoria guidelines, and relevant Australian Standards. This ensures reports are accepted by regulatory bodies and financial institutions across Victoria.
A Phase 1 ESA is typically the starting point for sites subject to EPA Victoria's audit framework. While it does not replace a formal audit, it informs whether further investigation is required and supports the appointment of an EPA-accredited auditor. Terralis can guide you through the full audit pathway if needed.
Far far away, behind the word mountains, far from the countries Vokalia and Consonantia, there live the blind texts. Separated they live in Bookmarksgrove right at the coast
What Our Clients Say
We’ve helped organizations across various industries achieve environmental compliance and sustainability goals.