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(02) 8960 0555





Shop 2, 793-799 New Canterbury Road,Dulwich Hill, NSW 2203

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TRACE Environmental specialises in remediation of contaminated soil and groundwater. Our team of engineers and scientists will assess the remediation requirements to make your site suitable for a proposed land use, and/or comply with regulatory or contractual requirements.


We evaluate the most cost and time-effective options available to achieve the remedial objectives, and have saved clients significant amounts of money on many projects. Commonly, TRACE Environmental is engaged to complete a remediation project and gain regulatory approval when our competitors fail to deliver the expertise and experience required to deal with the often complex and unexpected challenges that remediation projects can generate.

Hydrocarbon and Solvent Remediation

TRACE personnel have completed works on numerous sites nationally with hydrocarbon contamination in soil and groundwater. The types of sites include service stations, depots, terminals, residential development sites, manufacturing and mining facilities.


Technologies utilised have included:

  • Multi-Phase Extraction (semi- permanent or mobile units)
  • In-situ and Exsitu Chemical Oxidation (ISCO/ESCO) 

  • Pump and Treat 

  • Soil Vapour Extraction (SVE) 

  • In-situ Air Sparging (IAS)
  • Tankpit Dewatering 

  • Bioremediation including Biopile and Biofilter setups
  • Phytoremediation
  • Soil Composting 

  • Monitored Natural Attenuation (MNA), including enhanced MNA

Liquid Waste Stream Evacuation and Groundwater Treatment

TRACE personnel have completed many major decommissioning and upgrade projects which have required waste fluid treatment prior to discharge to sewer, or dewatering to aid retanking of sites.

Treatment of excavation water 
is a common requirement on decommissioning sites with shallow groundwater or tankpit water.  TRACE can provide direct on-site treatment of water ensuring cost- effective discharge of fluids from the site.

Heavy Metal Remediation

Soil and/or groundwater contaminated with heavy metals are a common problem associated with former commercial and industrial sites. Heavy metals such as lead, chromium, mercury and arsenic can result in series threats to human health as well as the natural environment.


Remediation of soil impacted with heavy metals is typically limited to costly and basic technologies such as: excavation and landfill disposal, or soil washing. These technologies often now give way to more practical management techniques such as relocation, containment or chemical fixation (stabilisation) based on exposure and risk. However, care must be exercised as some of the heavy metals are prone to leaching from the soil they have impacted and as a result can contaminate nearby surface water or groundwater.


Options available for remediation of groundwater impacted with heavy metals include pump and treat methods, reactive barriers, chemical or biological precipitation, and monitored natural attenuation (for reduction of metals such as Cr6+ to Cr3+).

Bioremediation and Other Technologies

TRACE Environmental scientists and engineers have encountered many different types of contaminants at different sites requiring alternate types of treatment or management to render the site being suitable for its current of proposed future land use.


Contaminants such as organochlorine pesticides (OCPs), polychlorinated bi-phenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs), or phenols can be addressed via various methods. Many of these contaminants can 
be treated using bioremediation.   


Bioremediation is an environmentally friendly and sustainable technology which is economically feasible when large quantities of soil require remediation, and sufficient time and space is available to achieve the remediation goals.


Technologies utilised by TRACE personnel have included:

  • On-site soil enhanced bioremediation / landfarming for beneficial re-use
  • Multi Phase Extraction (Mobile and Fixed Systems)   
  • In-situ and ex-situ chemical oxidation (ISCO/ESCO)
  • Monitored natural attenuation and fate and transport modelling
  • Reactive groundwater treatment zones
  • Phytoremediation