DNAPL Assessment and Remediation and Dry Cleaner Properties
Dense nonaqueous phase liquids (DNAPL) are a group of halogenated semi-volatiles, non-halogenated semi-volatiles, and halogenated volatiles with a greater density than water.
Michael Nicholls
Beneficial reuse of clean or remediated soil — reduce cost and landfill on property developments
Reusing remediated or clean excavated soil on-site or between nearby projects can save hundreds of thousands of dollars, reduce landfill and quarry demand, and speed delivery — if managed with appropriate soil science and EPA approvals.
Preliminary Site Investigation (PSI) for a Childcare Development Application — Western Sydney
iEnvi completed a rapid Preliminary Site Investigation (PSI) to support a developer converting a post‑war residence to a childcare facility in Western Sydney. The PSI followed NEPM guidance and NSW child‑care planning requirements, found low contamination risk, and recommended asbestos inspection prior to renovation.
Remediation of Coatings Manufacturer Site, Western Sydney
iEnvi provided a site-specific, commercially focused remediation program for a Western Sydney coatings manufacturer, combining UST removal, source-zone treatment and a four-month Multiphase Vapour Extraction campaign to manage solvent impacts and restore asset value.
National regulation and guidance for PFAS – The PFAS NEMP
iEnvi receive frequent requests from clients to help manage disposal of impacted materials, products, land or groundwater contaminated by per- and poly-fluoroalkyl substances…
NSW Duty to Report Contamination under the Contaminated Land Management Act 1997
The NSW EPA released new Guidelines on the Duty to Report Contamination in July 2015, replacing the 2009 version.
Mercury Human Health Risk Assessment near Mine Site, Tasmania
iEnvi conducted a targeted soil, sediment and surface water sampling programme near a scheelite mine and municipal water intake in Tasmania to assess potential human health risks from mercury. Results indicated likely minimal risk in sampled areas but limited sampling and incomplete site history mean follow-up actions were recommended.
Hexavalent Chromium Groundwater and Soil Remediation – Steel Processing
Remediation program for Cr6+ impacted soils and fractured-basalt groundwater at a long‑running steel processing facility. Summary of contamination, in‑situ treatment techniques trialled, pilot results and commercial considerations for redevelopment and liability management.
Sediment and Soil Remediation — Southern China
Overview of a multi‑site sediment and soil remediation programme in Southern China (from 2012). Remediation combined delineation, in‑the‑dry excavation, solidification/stabilisation and beneficial reuse of treated material as engineered fill.
Asbestos and Waste Tyre Advice — NSW Government Drainage Dam Project
Practical environmental and regulatory advice provided during a NSW Government drainage dam construction project where impacted fill, asbestos and waste tyres were exposed on Crown Land. Advice focused on safe legal waste management, maintaining construction progress and proposing a long‑term Environmental Management Plan.