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Contaminated Land

ACCON UK offers a comprehensive service in the field of contaminated land assessment, undertaking Phase 1, 2 and 3 investigations.

Phase 1 Desk Study

The Phase 1 desk study identifies any potential sources of contamination resulting from the current and historical activities at the site by reviewing available information from sources such as archives, plans and records, databases and information from regulatory authorities. In this way we can discover the past and current activities at a site and assess them for potentially contaminative processes, in order to determine the potential for the presence of contamination. A Conceptual Model is produced identifying the risk of contamination occurring on a site and determining what the risks are to future users of the site.

The Phase 1 study also identifies any potentially sensitive receptors, e.g. humans, surface watercourses, aquifers, buildings or ecological receptors and also collates the information relating to the site’s environmental setting i.e. geology, hydrogeology, industrial activity, location of controlled waters, pollution incidents and proximity to open/closed landfill sites.

This information is then used to undertake a qualitative Risk Assessment through the development of a conceptual model for the site. The conceptual model identifies any Significant Pollutant Linkages which may be present. If Significant Pollutant Linkages are present then a Phase 2 site investigation may be required to quantify the risk and also to assess the potential for environmental liability associated with the site.

Phase 2 Site Investigation

An intrusive site investigation is undertaken to investigate each aspect highlighted by the Phase 1 desk study. The Phase 2 investigation is designed and implemented using a variety of in-situ exploratory methods, depending on the size of site and type of contaminants identified by the desk study as being potentially present. We often appoint specialist contractors for the Phase 2 Site investigations depending on the scale of intrusive work required.

Phase 3 Remediation

If remediation is required following the Phase 2 works, then a site specific remediation methodology can be produced; this involves consultation with the regulatory authorities to ensure satisfactory design and implementation of the remediation programme.

Identifying risks to development and best practice solutions