A. D. Envirotech (ADE) specialises in the four major stages of contamination investigations set by the NSW DECCW (EPA) in Guidelines for Consultants Reporting on Contaminated Sites, 1997:

Stage I	Preliminary site investigation (PSI) Identifies past and present potentially contaminating activities Provides a preliminary assessment of site contamination
Stage II	Detailed site investigation (DSI) Gives comprehensive information on type, extent and level of contamination
Stage III	Site remedial action plan (RAP) Details the procedures to be implemented to reduce the risk to the environment to acceptable levels for the proposed site use
Stage IV	Validation and long-term monitoring Assesses and statistically confirms that the remediated site complies with the clean-up criteria set for the site

When petroleum or hazardous materials release involves contamination of soil or groundwater, it is essential to understand the magnitude of the contamination before a cleanup can begin. This investigation, commonly known as Phase II Assessment, involves subsurface sampling and field and laboratory analysis. ADE offers a complete and comprehensive service in contamination investigation using the best available technology. Once the extent of contamination is understood, ADE can usually provide a variety of solutions to a property owner so that the most feasible solution can be selected. Cost is an important factor in any remediation project and ADE specialises in identifying cost as part of a thorough investigation.

ADE applies advanced geophysical techniques when studying the subsurface environment at potentially contaminated sites. The geophysical methods significantly optimise drilling and sampling. Utilising our state-of-the-art geophysical equipment we reduce the risk of undetected targets and the overall cost of the investigation.

The following 3D image represents the underground conductivity variations at one of our sites in Sydney. The sampling program concentrated on the areas of high underground conductivity (presented in purple) and significantly reduced the cost of the investigation.

ADE use in-house drilling teams applying specially adapted drilling and sampling equipment conforming to the NSW DECCW (EPA) requirements. Field work is carried out in accordance with our endorsed quality control procedures accredited by EPA auditors.

ADE maintains the highest standards of security when conducting environmental assessments. All the details of the investigations are strictly confidential.

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