Intrusive Site Investigations (Phase 2)

 

Previous Stage- Phase 1 Desk Study 

Should the Phase 1 Desk Study identify a potential contamination risk resulting from current or historic use or industrial legacy, the next stage (EA CLR 11) is to undertake an Intrusive Site Investigation (Phase 2).

A Phase 2 investigation allows us to examine the ground conditions and contamination characteristics specific to a site, to determine firstly whether the suspected  contamination is present, and if it is, whether it is likely to represent a risk to human health/ controlled waters, or a long term financial liability to owners or developers.

Each investigation is designed and tailored to the specific Site and Contamination issues present, and with a view to your specific Objectives or constraints.

Using a variety of borehole drilling and excavation methods we examine ground conditions, take soil and groundwater samples and carry out a programme of chemical testing depending on the nature of contamination present or former use.

Analysis results feed back into the assessment, allowing us to revise our original risk assessment, and provide an indication of whether further investigation, or remediation works will be necessary.

In some cases, where risk is considerable, it may be necessary to model the site in greater detail, to determine the potential risk. This is referred to as a ‘Detailed Quantitative Risk Assessment’ (DQRA), and is described in greater detail here.

All of our site investigations are carried out in accordance with British Standards (BS 5930:2015, BS EN 1997-2:2007) and Eurocodes.

Next Stage- Remediation or Detailed Quantitative Risk Assessment