What is a Phase 1 Desk Study and why might you need one?
The site investigation sector follows a phased approach to inspecting land. This is written into statute through various related British Standards.
Simply put, the investigation process begins with a desk study. This sets a firm foundation to progress the investigation process further if this is deemed necessary.
The Phase 1 is the initial stage of the investigation. It gathers data, relies on desk-based information, and builds a picture of a series of geohazards that may be impacting your build.
Confused?
You might well be! Across the UK, various bodies refer to a desk study differently. It may be that you have been asked for a:
The above are all the Phase 1 Desk Study Report. The Environment Agency have published some useful information relating to this process. We have provided a link to this information here.
Purpose?
For any development that requires geotechnical or geoenvironmental investigation, it is good industry practice to conduct a Phase 1 Assessment initially.
You may require a desk study in support of a planning related submission. Consultees at the council, Environment Agency (England and Wales) or SEPA (Scotland) may have reason to believe your project build may be at risk. Consequently, a Phase 1 will be requested. This should be completed by a competent, such as a qualified geoenvironmental engineer.
The Process
The Phase 1 Assessment must consider the following main elements:
The Outcomes
All parts of the study are used to prepare a Preliminary Risk Assessment and Conceptual Site Model.
All potential risks present on or beneath your site can be identified. The Desk Study can be used to design a meaningful and robust intrusive investigation. The latter is known as the Phase 2, where the investigation physically targets potential geohazards.
Investigation without a Phase 1 Desk Study is not advisable. Critical information relating to your building site may be missed, and this can have adverse implications at later stages of the project.