Clear, practical guidance for site owners, developers and environmental managers on recognising a hydrocarbon sheen versus measurable LNAPL in groundwater, when a risk-based duty to notify regulators can be triggered in Australia, and how to manage next steps to reduce transaction, development and compliance risk.
iEnvi completed a Delineation Investigation (DI) at an aerosol and paint manufacturing site in northwest Sydney. The DI installed three groundwater monitoring wells, 13 soil bores and two stormwater points, collecting 8 groundwater, 39 soil and 2 stormwater samples. Findings showed minor soil hydrocarbons (one local exceedance), groundwater elevated dissolved metals likely related to background geochemistry, and isolated vapour-intrusion exceedances — prompting targeted sub‑slab vapour testing and further risk-management recommendations to meet NSW EPA expectations.
In-situ UPSS abandonment by foam filling at a Hervey Bay site where building constraints prevented tank removal, with AS4976-2008 compliance and follow-up closure advice.
UPSS assessment and Detailed Site Investigation for a rural service station in Far North Queensland, defining petroleum impacts and supporting acquisition and management decisions.
Confidential PSI and DSI for a former service station in inner Sydney, defining soil, groundwater and vapour impacts for legal advice, liability assessment and redevelopment planning.
Baseline environmental investigation for petrol station lease renewal in Granville, confirming low residual risk and supporting continued operation without a Section 105 notification.
Low‑flow groundwater monitoring was completed at a decommissioned underground petroleum storage site in Perisher Valley. Results identified no ecological or human‑health groundwater risk; recommendations and compliance notes provided for property transactions in Snowy Mountains National Park.
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.
Practical, cost‑conscious remediation and long‑term management of petroleum contamination at Council depots using a monitored natural attenuation (MNA)‑led strategy supported by targeted product removal, hydrogeological testing and fate‑and‑transport modelling.