What exactly is a Phase 1 Desk Study?



A Phase 1 Desk Study can be a preliminary risk assessment from the collation and review of published facts regarding a sites historical, geological and environmental setting. Get more info about Phase 1 Desk Study Report


The goal of a Desk Study is always to decide a preliminary danger rating and to plan the subsequent stages of the site investigation. This can be achieved by identifying any prospective ground connected hazards and possible contamination sources, pathways and receptors exactly where there may very well be possible risks to human health, vegetation, controlled waters, structures and services.


High High quality, Comprehensive Phase 1 Desk Study Reports by Skilled Engineers!


Please note, Each and every Phase 1 Desk Study Must include things like a Walkover Survey. This can be a requirement by the Local Authorities! Acquiring a report devoid of a Walkover survey are most likely to be rejected or an extra Planning Situation are going to be added. Moreover, the threat of unforeseen site investigation expenses and liabilities drastically increases.


Do I need a Phase 1 Desk Study?

You will find usually two scenarios for requiring a Phase 1 Desk Study:


Building a Site - a Phase 1 Desk Study (Preliminary Risk Assessment) will usually be a requirement within the Planning Situations set out by the Local Authority Planning Department. Hence, A Desk Study Report is carried out to satisfy the numerous regulatory specifications of Planning Departments, Environmental Health Departments, the Atmosphere Agency, Building Control Departments and National House Building Council (NHBC).


Property Transactions (Due Diligence) - before acquiring a site or property, as a minimum requirement we advise a Desk Study is carried out to determine and evaluate any possible risks connected with all the site and the liabilities which the potential purchaser will acquire.


When must a Phase 1 Desk Study be undertaken?

A Phase I Desk Study is ordinarily carried out in the start from the site investigation process. The Desk Study characterises the site and delivers data and an initial conceptual ground model for the remainder (if expected) with the site investigation process.


What is included inside a Phase 1 Desk Study Report?


At Sub Surface our Phase 1 Desk Study Reports involve:


Executive Summary - a summary of the report and findings on one web page.


Site Information - Site Location, Site Boundaries, Present Land Use, Proposed Site Use, Particulars of the Walkover Survey.


Historical Appraisal - a review of historical Ordnance Survey plans with the previous uses and structures on site and also the quick surrounding area.


Geological Appraisal - Artificial Ground, Superficial Strata, Bedrock, Mining, Geomorphology, Natural Ground Subsidence, Radon Gas, and so on.


Environmental Appraisal - Prospective Contamination Sources, Pollution History, Landfill Sites, Hydrogeology and Hydrology, Flooding, and so on.


Conceptual Ground Model - a preliminary threat assessment of potential ground associated hazards and possible contamination sources, their pathways and receptors exactly where there might be prospective risks to human health, vegetation, controlled waters, structures and services.


Site Investigation- Recommendations (if required) which includes, 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 pay a visit to to site by an Engineer to undertake a thorough inspection in the site to confirm, amplify and supplement the details inside the Desk Study and to visually and olfactorily assess any possible zones of contamination.


What occurs if the site is inside a Coal Mining Region?

For sites situated within an region that might be impacted by mine workings (parts of Lancashire, Manchester, Yorkshire, Derbyshire, West Midlands, etc.), a Coal Authority Mining Report will be expected and incorporated inside the Phase 1 Desk Study.


In the event the Coal Authority Mining Report indicates that there is a doable threat to ground instability and subsidence, or if we believe there's a prospective for unrecorded mines beneath the site or mine entries, a Coal Mining Risk Assessment are going to be needed.


What are the Benefits of a Phase 1 Desk Study?

There are several benefits of carrying out a Phase 1 Desk Study prior to commencing an intrusive site investigation or getting a site, which includes:


Identifying potential geotechnical, environmental and health and safety problems, which could substantially have an effect on the site investigation and/or the project.


The formulation of a preliminary risk assessment allows for efficient targeting of project sources and avoids money getting wasted on inappropriate intrusive ground investigations.


Supply early warning of probable delays or spending budget implications via previously unknown site qualities.


Offers facts on achievable contaminants and anticipated locations of contamination.

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