Asbestos Source Assessment and Clearance for a Development Site, South-West Sydney

Aerial imagery review and field validation sampling at a greenfield development site

iEnvi provided an independent asbestos source assessment and post-removal clearance at a greenfield development in south-west Sydney. The assessment determined the fragment originated from a historic stockpile, verification testing returned no asbestos detected, and the site was cleared to progress with development.

NBN Trench and Pit Works, Brisbane QLD

iEnvi supported a Tier 1 contractor delivering NBN trenching and pit works across a major Brisbane infrastructure precinct, managing PFAS and asbestos risk with in‑situ waste classification and immediate backfill to meet Commonwealth safety requirements and avoid costly hazardous disposals.

Metropolitan Bus Depots – Environmental Compliance and Investigations

Practical environmental investigations and compliance audits across four Melbourne bus depots established a defensible baseline, identified localised hydrocarbon impacts near refuelling areas, confirmed no landfill‑gas risk from adjacent closed tips, and delivered reporting and management measures to meet Victorian regulatory expectations.

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.

Fresh Lease, Clean Start: Baseline Check at a Busy Brisbane Logistics Hub

iEnvi completed a targeted, construction‑friendly Baseline Contamination Investigation at a large southern Brisbane warehouse and logistics facility to provide a defensible contamination snapshot for lease handover. The program combined desktop records review, GPR service clearing, targeted drilling (8 locations to ~8 m), 16 primary soil samples plus QA/QC for TRH, BTEXN, PAHs, metals and asbestos, and a Baseline Contamination Report signed by a CEnvP Site Contamination specialist.

From an EPA Clean-Up Notice to a Clear Path Forward

How a targeted investigation, waste classification testing and a pragmatic remediation strategy closed data gaps for asbestos‑contaminated imported fill in north‑west Sydney — turning a NSW EPA Clean‑Up Notice into a compliant, cost‑efficient remediation pathway.

From Quarterly to Biannual: Groundwater Monitoring that Keeps Risk Low

Practical groundwater monitoring that confirms monitored natural attenuation, meets regulator expectations, and supports a safe transition from quarterly to biannual sampling with clear triggers and contingency planning.