TOPA and PFAS Precursor Detection
One uncertainty regarding per‐ and polyfluoroalkyl substances ( PFAS) is the total oxidisable precursor assay (TOPA).
Michael Nicholls
Water Quality Sampling for Cattle Watering and Irrigation, Scenic Rim QLD
iEnvi assessed water from two surface dams and one groundwater bore at a Scenic Rim property in Queensland to determine suitability for livestock watering and feedstock irrigation. Results were compared to ANZECC 2000 guidelines, finding water suitable for stock with some crop restrictions.
Contaminated Waste Soil Management — Sydney Sports Ground
iEnvi managed PCB‑ and asbestos‑contaminated fill excavated for light footings at a Sydney western suburbs sportsfield, achieving regulatory approvals for interstate disposal and reducing council disposal costs by using targeted asbestos clearance, testing and specialist PCB destruction options.
Auto Wreckers — PSI and Operational Environmental Management Plan, Brisbane
Preliminary Site Investigation (PSI) and a proportionate Operational Environmental Management Plan (OEMP) prepared for an automotive recycling (wrecking) yard in south‑west Brisbane to manage scattered hydrocarbon staining without extensive soil 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.
Construction Environmental Management Plans (CEMP)
Construction environmental management plans (CEMP) are basically the who, what, when and where of on-site environmental management during construction activities.
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.
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.