Proof in the Soil: PSI and Screening for a Former Sawmill

A concise, defensible Preliminary Site Investigation (PSI) and targeted soil screening at a former regional Queensland sawmill clarified contamination risk (timber-treatment residues, unknown fill, petroleum), updated the conceptual site model and set clear triggers for any further DSI or groundwater work — supporting sale, planning and due diligence.

Ensuring Safe School Development: Soil and Asbestos Investigations in Melbourne’s Northern Growth Corridor

Proposed school site with stockpiles in distance

iEnvi conducted a Preliminary Site Investigation and soil testing across a large greenfield parcel in Melbourne’s northern growth corridor. Surface sampling and stockpile checks found no asbestos or contaminant levels above NEPM Tier 1 screening criteria for sensitive land uses, supporting school development approval with practical construction-phase recommendations.

Preliminary Site Investigation, Inner Melbourne Residential Development

Aerial view of an inner Melbourne residential development site assessed by iEnvi

iEnvi completed a desk-based Preliminary Site Investigation (PSI) for a proposed residential development in inner Melbourne, Victoria. The PSI found a low risk of contamination, confirmed intrusive soil testing was not required, and enabled the planning application to proceed without an environmental audit.

Soil Investigation Clears Path for Safe Construction at Chemical Site, Victoria

iEnvi completed an asbestos- and contaminant-focused soil classification at an industrial chemical site in Melbourne, providing a compliant, cost-effective pathway for excavation and construction of a flammable goods storage area.

Compliance Investigation and Cost‑Effective Remediation of Asbestos‑Impacted Soil at a Northern Melbourne Industrial Site (VIC)

industrial site land

iEnvi investigated asbestos‑impacted soil and groundwater at an industrial site in northern Melbourne (VIC). Bonded asbestos in stockpiled soil was removed by hand‑picking (emu‑picking) and the remaining material verified for reuse as clean fill, avoiding costly landfill disposal while meeting EPA Victoria obligations under the General Environmental Duty.

Orchard Preliminary Site Investigation and Soil Sampling, Riverina NSW

iEnvi conducted a preliminary site investigation, soil sampling, and a geotechnical classification on an orchard to determine whether the site was suitable for a low density residential development. All requested tasks had to be completed quickly and to a high standard for the client to obtain financing.

iEnvi completed a rapid preliminary site investigation (PSI), soil sampling (60 samples) and geotechnical site classification for a 75‑lot low‑density residential proposal on former citrus orchard land in the Riverina region of NSW. Soils met NSW Excavated Natural Material criteria and the site was classified as moderately reactive (20–40 mm movement potential).

South Australia: 2 x PSI on Agricultural Land for 70- and 50-Lot Residential Developments

iEnvi can conduct preliminary site investigations and soil sampling anywhere in Australia. Recently we undertook such work in South Australia, for a developer who required fast turnaround on preliminary site investigations and soil sampling for two potential housing developments.

iEnvi completed two fast-turnaround Preliminary Site Investigations (PSI) near Adelaide, SA. One site showed significant risk from past loam mining and fill and requires a larger investigation, remediation and auditor sign-off; the second was suitable for a 50‑lot subdivision after limited sampling.

Preliminary Site Investigation for Child Care Centre — Sydney Northern Beaches

Desktop (Phase 1) preliminary site investigation for a proposed child care centre in Sydney’s Northern Beaches. The desktop study identified low contamination potential from on‑site history but recommended targeted soil sampling and an asbestos hazardous‑materials inspection before council proceeds with a development application.

Townhouse Development Preliminary Site Investigation, Sebastopol (Vic)

Case study: PSI, combined geotechnical and environmental drilling, 30 soil bores to 5 m, 15 primary soil samples. Delivered reporting for planning permit in ~2 weeks; cost reported just over $10,000. Practical takeaways for developers on compliance, demolition hazards and cost efficiencies.