What’s a Phase 1 Desk Study?
A Phase 1 Desk Study is usually a preliminary threat assessment from the collation and review of published data concerning a sites historical, geological and environmental setting. Get additional facts about learn more about this
The objective of a Desk Study is to establish a preliminary risk rating and to plan the subsequent stages of the site investigation. This is achieved by identifying any possible ground associated hazards and potential contamination sources, pathways and receptors where there may be prospective risks to human health, vegetation, controlled waters, structures and services.
Higher High quality, Complete Phase 1 Desk Study Reports by Expert Engineers!
Please note, Every Phase 1 Desk Study Will have to include things like a Walkover Survey. This can be a requirement by the Local Authorities! Acquiring a report without a Walkover survey are probably to be rejected or an added Planning Situation are going to be added. Furthermore, the danger of unforeseen site investigation fees and liabilities drastically increases.
Do I require a Phase 1 Desk Study?
There are generally two scenarios for requiring a Phase 1 Desk Study:
Developing a Site – a Phase 1 Desk Study (Preliminary Threat Assessment) will frequently be a requirement in the Planning Circumstances set out by the Local Authority Planning Division. Hence, A Desk Study Report is carried out to satisfy the numerous regulatory needs of Planning Departments, Environmental Health Departments, the Atmosphere Agency, Building Control Departments and National House Building Council (NHBC).
Property Transactions (Due Diligence) – prior to purchasing a site or property, as a minimum requirement we advocate a Desk Study is carried out to identify and evaluate any prospective risks associated together with the site as well as the liabilities which the prospective buyer will obtain.
When need to a Phase 1 Desk Study be undertaken?
A Phase I Desk Study is typically carried out in the start out in the site investigation process. The Desk Study characterises the site and offers details and an initial conceptual ground model for the remainder (if expected) of the site investigation process.
What exactly is included in a Phase 1 Desk Study Report?
At Sub Surface our Phase 1 Desk Study Reports include:
Executive Summary – a summary on the report and findings on one page.
Site Facts – Site Location, Site Boundaries, Present Land Use, Proposed Site Use, Particulars in the Walkover Survey.
Historical Appraisal – a review of historical Ordnance Survey plans of your past uses and structures on site and also the quick surrounding location.
Geological Appraisal – Artificial Ground, Superficial Strata, Bedrock, Mining, Geomorphology, Organic Ground Subsidence, Radon Gas, and so on.
Environmental Appraisal – Possible Contamination Sources, Pollution History, Landfill Sites, Hydrogeology and Hydrology, Flooding, and so on.
Conceptual Ground Model – a preliminary threat assessment of prospective ground related hazards and potential contamination sources, their pathways and receptors exactly where there may be prospective dangers to human health, vegetation, controlled waters, structures and services.
Site Investigation- Recommendations (if essential) including, Contamination Analysis, Ground Gas Monitoring, etc.
What exactly is a Walkover Survey?
All of our Phase 1 Desk Studies consist of a Walkover Survey (Site Reconnaissance). A Walkover Survey is usually a go to to site by an Engineer to undertake a thorough inspection in the site to confirm, amplify and supplement the information and facts within the Desk Study and to visually and olfactorily assess any possible zones of contamination.
What takes place if the site is within a Coal Mining Location?
For sites positioned inside an region that might be affected by mine workings (parts of Lancashire, Manchester, Yorkshire, Derbyshire, West Midlands, and so on.), a Coal Authority Mining Report will be needed and incorporated within the Phase 1 Desk Study.
If the Coal Authority Mining Report indicates that there’s a feasible risk to ground instability and subsidence, or if we think there’s a possible for unrecorded mines beneath the site or mine entries, a Coal Mining Risk Assessment might be essential.
What are the Benefits of a Phase 1 Desk Study?
There are lots of benefits of carrying out a Phase 1 Desk Study prior to commencing an intrusive site investigation or buying a site, including:
Identifying possible geotechnical, environmental and health and safety troubles, which could drastically have an effect on the site investigation and/or the project.
The formulation of a preliminary threat assessment makes it possible for for efficient targeting of project resources and avoids money becoming wasted on inappropriate intrusive ground investigations.
Supply early warning of attainable delays or price range implications via previously unknown site characteristics.
Delivers details on possible contaminants and anticipated regions of contamination.
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