Environmental Engineering


Environmental Engineering

EI Australia’s in-house Environmental Engineering team consists of a range of scientists, engineers, certified environmental practitioners and licensed asbestos assessors. Our team specialises in the Contaminated Land Management (CLM) of soil, groundwater, surface water, vapour and hazardous ground gases. For over the last 25 years, our clients have had the confidence that we have the knowledge and experience of successfully applying practical and sustainable solutions.

  • CLM investigations, remediation and site validation for soil, groundwater, dewatering management, soil vapour and hazardous ground gases
  • Preliminary Site Investigation (PSI) and Detailed Site Investigation (DSI)
  • Remediation Action Plans (RAP)
  • Environmental Management Plans (EMP)
  • Construction Environmental Management Plan (CEMP)
  • Site validation
  • Soil Waste Classifications for landfill disposal
  • Acid Sulfate Soil Investigations
  • Environmental monitoring of landfills, soil gas, surface water, groundwater and air quality
  • Underground Petroleum Storage Systems(UPSS) monitoring, removal, decommissioning, validation and tank disposal
  • Human Health & Environmental Risk Assessments and fate and transport modelling
  • EPA Site Auditor and Council liaison to achieve project sign-off and plan approval
  • Expert witness for Land and Environment Court
  • Research and Development (R&D), Treatability Studies


Investigation and Remediation

EI Australia’s Contaminated Land Management (CLM) team has extensive knowledge in providing Phase 1 Preliminary Site Investigations (PSI), Phase 2 Detailed Site Investigations (DSI), Remediation Action Plans (RAP) and Site Validation Reports. Our team has the skill and experience to evaluate a range of sustainable remediation options in accordance with the State Environmental Planning Policy (SEPP 55) and develop an approach that is practical, affordable and technically feasible with regards to project outcomes and meeting with the regulator’s approval (i.e. council, EPA and Site Auditor).


Remediation of Site Contamination

In addition to any initial CLM investigations, EI Australia’s CLM team has the skill and experience to work with our clients to remediate soil and groundwater contamination in the ground (in-situ) or after excavation/ pumping (ex-situ).

After a thorough evaluation of a range of remedial options to select the most feasible and sustainable strategy, in consideration of impacts to the environment, as well as technical feasibility, projected clean-up timeframes and affordability, EI Australia can develop a remediation approach that meets with legislative, regulatory and Site Auditor approval and achieves the required project outcomes.

Remedial methodologies used successfully on previous projects have included:

  • Contaminated soils: bioremediation, in-situ stabilisation, encapsulation, vapour extraction and off-site disposal to licensed landfill; and
  • Contaminated groundwater: in-situ chemical oxidation, air-sparging/vapour extraction, ex-situ treatment with re-injection and monitored natural attenuation.


Waste Classification Assessment

EI Australia’s CLM team has the skill, knowledge and experience to help waste generator’s (i.e. contractors, builders, developers, landfill operators) to classify the wastes they produce in accordance with the NSW Environment Protection Authority (EPA) guidelines and exemptions. EI Australia understands that the classification and offsite disposal of soils is often a costly component of any construction project and should be completed with minimal delays. Our team of experts regularly provide technical, affordable and practical solutions to classifying waste for offsite disposal with expedited turn-arounds.


Feasibility Studies & Landfill Design

Government regulators increased emphasis on the control and management of landfill sites and the assessment of soil, vapour emissions and environmental impacts from migrating groundwater contamination requires experiences CLM practitioners to ensure compliance. Our capabilities and the services provided in relation to landfill sites are extensive:

  • Site selection
  • Hydrogeological and geotechnical investigations.
  • Longer term monitoring requirements.
  • Geotechnical engineering
  • Hydrogeological assessment
  • Surface water management systems
  • Landfill Cell design and Leachate Management Plans
  • Gas extraction system
  • Cover materials specifications
  • Landfill gas risk assessment
  • Landfill closure plans
  • Landfill licence compliance monitoring
  • EPA applications for waste in operational purposes
  • Cost estimates (closure)
  • Landfill Environmental Management Plans (LEMPs)

Given the nature of waste disposal operations and their consequent long-term implication on the environment, EI Australia has substantial experience in all aspects of landfill operation and management and is ideally placed to provide landfill owners/ operators with environmental management plans, which not only meet regulatory requirements, but are also practicable.

In addition to meeting legislative requirements, a performance-based landfill environmental management plan prepared on the basis of best management practices is also a valuable tool for managing the long-term liability of landfilling operations.


Our Environmental Team can assist with each of these services as and when required

Landfill Gas Emission Investigations and Leachate in Groundwater Monitoring

Assessments are commonly required for establishing baseline conditions and predicting future movement, quantity and quality of groundwater and the potential for leachate leaking from landfills to cause contamination.

Leachate Treatment

Our team is experienced in the design and implementation of leachate management plans and groundwater treatment systems at major landfills nationally, covering a wide range of geological conditions. Following site assessments and identification of potential problems, EI Australia will design and undertake or manage trials of various technologies incorporating physical, chemical and biological treatment.

Acid Sulfate Soils

The term Acid Sulfate Soils (ASS) is used to describe sulfide-rich, natural soils, sediments and peat deposits, which can lead to the formation of sulfuric acid as a result of material disturbance and exposure to the atmosphere. ASS occur all around the country and if left unmanaged the sulfide oxidation process can make the groundwater acidic, causing naturally-occurring heavy metals (such as iron, aluminium, arsenic and copper), to be leached from the soil and transported to surface water bodies. This can lead to adverse impacts on vegetation, aquatic organisms (including ‘fish kills’), as well as causing damage to steel and concrete structures (corrosion) such as pipes, culverts, bridge piers or retaining walls.

EI Australia has the skills, capability and experience to assist with the identification and management of all Acid Sulfate situations.

Underground Storage Tank Removal, Decommissioning, Validation

Our CLM team have a breadth of experience across both the upstream and downstream petroleum industry sectors including the assessment, remediation, and decommissioning of underground and above-ground petroleum storage systems (UPSS) in accordance with current legislation, regulatory understanding and requirements, and health and safety stewardship.

EI Australia supervise remediation and validation of underground storage tanks (USTs) in accordance with the following guidelines and standards;

  • POEO (2014) Protection of the Environment Operations (Underground Petroleum Storage Systems) Regulation 2014; and
  • Australian Standard (2016) The removal and disposal of underground petroleum storage tanks, AS 4976-2008 (Reconfirmed) dated 15 July 2016.
  • EPA (2014) Technical Note: Investigation of Service Station Sites;
  • DECCW (2008) Guidelines for Implementing the Protection of the Environment Operations (Underground Petroleum Storage Systems) Regulation 2008;

The management and supervision is required by a suitably qualified environmental professional to reduce volatilisation risks and ensure the remedial works are competed in accordance with the above requirements.

Talk to us!

For more information about how EI Australia can help you with your project, contact us on (02) 9516 0722 or email

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