Phase 2 - Site Investigation

It is advisable that a Phase 1 Desk Study be completed prior to the commencement of a Phase 2 Site Investigation.

A Site Investigation will draw from the findings of the Desk Study report and Conceptual Site Model (CSM), to allow a targeted approach to be taken, when formulating an effective intrusive investigation. The fieldwork will comprise the most appropriate exploratory techniques suited to the site considering access restrictions, conditions and investigation requirements.

Solmek work closely with experienced drilling contractors to offer common and advanced drilling services, the techniques available include:

  • Cable percussive boring with small percussive 'mini-rig' and cut-down systems available
  • Rotary drilling (open and cored) with Geobore 'S' and Symmetrix systems available
  • Window sampling and probing
  • Trial pitting
  • Hand auger
  • In-situ testing

Logs are produced of the ground conditions encountered on site; with electronic logging available on request, which record changes in strata, sampling depth, in-situ test data, water strike records and notes of visual and olfactory contamination etc.

Depending on the requirements of the investigation and the ground conditions encountered samples may be subject to geotechnical and environmental analysis.

At Solmek we have access to our own in-house UKAS accredited soil testing laboratory for a wide range of tests specified to BS 1377-1990. This gives clients the advantage of more rapid commencement of testing, an assured quality of service and closer communication between engineers and laboratory staff.

Sample integrity is most critical in relation to contamination analysis, therefore, samples are preserved in appropriate containers and stored during transport under controlled environmental conditions. Environmental samples are sub-contracted to MCERTS accredited laboratories for analysis.

The testing data is used to compile or refine risk assessments relating to pathways between on-site and off-site receptors detailed within the CSM. These receptors would generally include the end users of the site, construction workers, users of surrounding sites, vegetation, groundwater and surface water receptors, construction and utility materials and fabrics. The CSM is amended where new or more refined data is obtained, unacceptable risks are highlighted which may necessitate additional intrusive investigation and sample analysis. In this case, once a thorough understanding of the site conditions is obtained, a remediation statement would be the next logical step toward gaining planning approval.