Desk Studies
Desk studies collate and review existing information available on a site prior to intrusive works.
A desk study report, sometimes referred to as a preliminary geoenvironmental appraisal assessment is typically the first phase in any ground investigation. A desk study involves the collation and review of existing information relating to a particular site. Main sources of information include, but are not limited to:
- Landmark report (Envirocheck)
- Historical plans
- Mining report
- Petroleum officers report
- Geological maps
- Hydrogeological maps
- Radon maps and reports
- Site walkover surveys
- Local Authority searches
- Aerial photographs
The study assesses the risk of potential contamination and hazardous gas and reviews likely ground conditions. A site walkover survey is undertaken to allow a visual assessment of the site to be made, this ensures that further sources of contamination are identified in addition to those noted from the desk study information; it also highlights any further constraints or issues such as slopes and difficult access on to the site. Once the desk study information is obtained the phase 2 investigation can be designed accordingly.
The desk study is an important tool to fully assess a site prior to development. Without a desk study problems can often be encountered at a later phase of investigation or during construction which can prove costly. A desk study allows an appropriate investigation to be designed and undertaken and can provide insight into potential development constraints.