Rotary Drilling after Coal Mining Risk assessment

Site Investigation Services

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phase 1 desk study
phase 1 desk study
phase 1 desk study
phase 1 desk study
phase 1 desk study
phase 1 desk study

Site Investigation Services

Site Investigation Services

We undertake all aspects of site investigation services for an extensive range of clients; from initial soil analysis and feasibility/pre-purchase assessment, phase 1 desk study, flood risk assessments, contaminated land, slope stability, and basement impact to name a few….

The scope of the investigations and techniques used will depend on a range of factors including:

  • The prior use of the site
  • Anticipated geology and subsurface structures
  • The proposed development design and function
  • Known history of the site and the surroundings
  • If the site is in a coal mining area
  • If the site is in a flood zone

Our Site Investigation Services are an essential step in understanding your development site and ground conditions.

More Information on Site Investigation Services.

What Is the Site Investigation Process?

Site investigations are carried out with a phased approach

  • Phase 1 Desk Study
  • Phase 2 Intrusive Site Investigation
  • Phase 3 Post Site Investigations
  • Phase 4 Site Investigations Report

Step 1  – Complete the Phase I Desk Study and site walkover.

A Phase 1 Desk Study is a preliminary risk assessment report for a development site, often required for planning application approval.
Ideally, a Desk Study should also be accompanied by a walk over a survey conducted by an experienced practitioner. By compiling available information in relation to a site’s environmental, geological, hydrogeological, hydrological and mining setting, a cost-effective and focussed site investigation will be developed.

A Phase 1 Desk Study should always precede any ground investigation.Using the interpretive report to highlight potential development issues, environmental and cost liabilities requiring further investigation.

Step 2 – Phase 2 Intrusive Site Investigation

A Phase 2 assessment consists of an Intrusive Site investigation with quantitative risk assessment. The Phase 1 Desk Study will highlight the areas for further investigation and define the scope of these works. Any potential pollutant linkages can then be prioritised for investigation and depending on the Phase 1 Desk study report the appropriate investigation techniques utilised.

Site Investigation Intrusive Techniques Examples:
  • Cable Percussive Boreholes
  • Window Sample Drilling
  • Deep Window Sample Borehole
  • Rock Coring
  • Rotary Boreholes
  • Rotary Core Drilling
  • Dynamic Probing
  • Trial Pits
  • Trenches
  • Windowless Sampling Rig
  • Soakaway Testing
  • Modular windowless sampling drilling rig
  • Plate bearing testing
  • California bearing ratio (CBR) testing

Step 3 – Post Site Investigations

Once the preliminary site investigations have been completed the results are analysed. If further site investigations are required these can be completed by our multi-disciplined team. These could include:

  • Environmental Monitoring
  • Soil Testing
  • Geotechnical Monitoring
  • Slope Stability Assessment
  • Radon Monitoring
  • Remediation Designs
  • Gas protection measures.

Step 4 – Site Investigation Report

An interpretive report will then be compiled from all the information and data gathered from the ground investigations, testing, monitoring for the site.

Our Earth Environmental & Geotechnical consultants can discuss the details of the report and provide further services as required

Trial Pits

Trial Pits

Trial Pits are used for sub-surface site investigations and examination of the soil, rocks and groundwater. Trial pits ideally proceed construction works to determine the geology and the water table of that specific site and are typically between 1 and 4 metres deep.

Rotary Drilling

Rotary drilling is used to collect soil and rock strata samples, or to form deep observation boreholes. Rotary drilling is used for very dense soils and rock to investigate and analyse the sub-surface ground conditions up to a depth of 100m.

Cable Percussive Boreholes

Cable Percussion Boreholes

Cable percussion boreholes can be used to investigate the soil profile to a depth of up to 50m. Different cutting head heads are used for different soil types. Chisel for rock and hard layers, a shell for granular soils and a clay cutter for softer cohesive soils.

Windowless sampling drilling rig

Window Sampling

Window Sampling is used on soft ground and cohesive strata to extract soil, clay or sand samples for geotechnical or chemical analysis. Window sampling is a great technique to recover undisturbed samples for geotechnical and environmental analysis.