Phase 1 Desk Study

What is Phase 1 Desk Study?

A Phase 1 Desk Study is the basis for creating a robust Site Investigation. Also sometimes referred to as a Preliminary Risk Assessment, the Desk Study is a critical component in developing a preliminary Conceptual Site Model (CSM) to identify potential pollutant linkages.

During the desk study process, we meticulously compile site-specific data, encompassing geology, hydrogeology, hydrology, site history, mining & quarrying, landfill & waste, any potential land contamination and regulatory concerns from entities like the Local Authority and the Environment Agency. This comprehensive approach enables our Geo-Environmental Consultants to construct a detailed environmental profile of the site. By identifying potential contamination sources, pathways, and receptors, we establish ‘pollutant linkages’—a prerequisite for further investigation (refer to our Phase II Site Investigations page).

Phase 1 Site Investigations can also help identify the anticipated ground conditions beneath proposed structures for geotechnical purposes.

What’s included in a Phase 1 Desk Study?

Site Walkover Survey

Conducting a site walkover survey is crucial for comprehensively documenting key features on your site. Our focus includes identifying potential geohazards like land contamination, hazardous ground, and documented subsidence areas. Additionally, we evaluate ecological and environmental factors, addressing issues like invasive weeds and relevant on-site and neighbouring features.

Historical & Geological Site Review

We analyze your site’s history to uncover potential hazards from previous uses. If risks are identified, we conduct a targeted soil investigation, utilizing the latest British Geological Survey techniques. This thorough investigation assesses soil, rock, and minerals beneath your project, ensuring the integrity of structures and safety for future use. Phase 2 Ground Investigations are tailored based on the finding from the Phase 1 Preliminary Risk Assessment/Desk Study.

Coal Mining Risk Assessment

Mining and mineral extraction was once prevalent across the UK and can cause potential risks like ground instability, especially in coal, chalk, and gypsum extraction areas. Our preliminary mining and coal risk assessments examine historical plans and records and ensures thorough site scrutiny. If your development is located in a high-risk area where mining was previously conducted, the Coal Mining Risk Assessment will contribute to the targeted intrusive Ground Investigation that is undertaken in the Phase 2 Site Investigation.

Preliminary Geotechnical & Geoenvironmental Assessment

Your Phase 1 Desk Study includes a preliminary Geotechnical Assessment pinpointing potential geological constraints. Early detection of hazards like poor ground conditions is vital. If risks are identified we will ensure your Phase 2 Ground Investigation is tailored to provide a thorough assessment so that we can develop pragmatic solutions. Our Geoenvironmental Assessment will also assesses early-stage contamination hazards to manage any risks from past activities near your site.

Conceptual Site Model (CSM)

We’ll provide an assessment of your geotechnical and geoenvironmental risks and provide tailored advice for your project. We may recommend a Phase 2 Site Investigation – but only where we identify potential risks. Our geotechnical and land contamination specialists identify constraints and develop effective, minimally disruptive solutions. We collaborate with regulatory authorities for safe, robust, and acceptable technical recommendations.