A Phase 2 Ground Investigation is an intrusive site assessment carried out to confirm ground conditions, geotechnical properties, and potential contamination risks.

Crucially, Phase 2 forms part of the Land Contamination Risk Management (LCRM) framework and is typically required to discharge planning conditions following a Phase 1 Desk Study.

Key Objectives

  • Confirm ground conditions and variability
  • Assess geotechnical properties for foundation design
  • Identify contamination risks to human health and groundwater
  • Evaluate stability issues (e.g. made ground, mining, slopes)
  • Provide parameters for design and remediation

Typical Methods

  • Trial pits – shallow ground inspection
  • Boreholes (cable percussion / rotary) – deeper profiling
  • Window sampling – rapid, shallow investigation
  • In-situ testing (e.g. SPT, CBR)
  • Laboratory testing – classification, strength, contamination
  • Groundwater/gas monitoring where required

Why It Matters

Phase 2 reduces uncertainty and ensures that risks identified in Phase 1 are properly assessed and managed, allowing safe, compliant, and cost-effective development.

 

Summary

As part of the LCRM process, a Phase 2 GI is a key step in progressing a site through planning, providing the data needed to move from risk identification to design and remediation.

Related Projects