Phase 3 Site Investigation

A detailed Phase 3 Site Investigation would be required on a project where a Phase 2 site investigation is commissioned, some initial chemical and geotechnical testing is carried out and the results indicate that there is a requirement for further work, such as a site where significant levels of contamination are recorded. Exploratory holes are usually spaced around 25 – 50m apart depending upon the size of the site and any restrictions present. On some sites further investigation is then required to collect information at greater sampling densities & frequencies and at closer spacing between existing holes. This can provide more information about the underlying soils and there chemical contents which can have an effect on the quantities or soils that require removal or remediation at a site. We can ultimately save our client money by conducting a thorough Phase 3 Site Investigation and potentially reducing removal and remediation costs.

Phase 3 Site Investigation are not just limited to sites with significant contamination, but are also used on site where geotechnical information is required. I.e a phase 2 site investigation is carried out at a site and the ground conditions encountered are very variable and change significantly across the site, we would recommend that further work is carried out to gather more information between the existing exploratory holes. This information can be crucial to any foundation and substructure design. Without it structural engineers can over design foundations to cover all situations which can ultimately cost the client significantly more money. On the other end of the scale if foundations are designed without the correct information, then there can be a risk of total and differential settlement.

Contact Us

Call us now for a no obligation quote

Call Us0844 504 3901
We’ll beat genuine like for like quotes


Fully Accredited

GeoCon are members of the British Geotechnical Association, AGS, CHAS Accredited and registered with ISO 9001, 14001 and 18001.

Expert Service

GeoCon specialise in Ground Engineering and Engineering Geology focusing on site investigation for all sizes of projects.

Precise Reporting

Our skilled consultants, ensure all projects are delivered on time, contact us today to find out how GeoCon can help.

Nationwide Coverage

GeoCon SIte Investigations have six regional offices located in London, Manchester, Birmingham, Newcastle-Upon-Tyne, and Bristol.

Geocon Site Investigations