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Combine your site surveys with substantial cost savings...

The survey data obtained from a single site visit is linked to a common datum, all in one file, with the added ability to upgrade to a full topographic drawing for a small additional cost.

For more information on how SUMOplus+ can facilitate your Design and Build Program,

call 0845 456 1104 today!

With the pressure on for Design and Build Contractors to submit detailed design and planning in ever reducing time scales, reliable and comprehensive information is essential before you can assess the development risk and start detailed design.

And it’s not just the unknown buried utilities that affect the design process and cost money... it’s the other buried obstructions as well, such as voids, culverts and foundations. You won’t find them with a conventional utility survey.

SUMOplus+ supplies the information in a systematic approach to promote early design decisions from the first day on site:


Real Time Utility Mark-out

A non-invasive survey is carried out to identify buried utilities onsite, the results of which are visible on the ground on the day of the survey, so possible restrictions are highlighted immediately and early design and planning decisions can be made.


Utility Mapping

Detailed drawings follow within 7 days, with the results of the Utility Mark-Out Survey and the assessment of the ground penetrating radar data plotted on a topographical drawing in a DWG AutoCAD file, with an “easy to use” layering format.


Development Risk Drawings

These follow a few days later when our geophysical engineers have carried out an in-depth analysis of the Geophysical data identifying any potential buried obstructions and underground anomalies not normally revealed in a conventional utility survey.

A new approach to site investigation

Our advanced level survey solution combines utility, geophysical and topographic survey techniques. This gives you a complete picture of all above and below ground obstructions, including features you won’t find with a conventional utility survey.

Not only does this significantly reduce the development risk, but there is huge cost savings.
It collects all of the data from a single supplier, on one site visit and links to a common datum in one file.

Project : Imperial Wharf, London

Project : Imperial Wharf, London

The reason for the survey

A ground conductivity survey was carried out over the site of a former Victorian gas works. The site at the time of the survey had been cleared leaving a surface of hardcore rubble and concrete slabs. It was known that extensive contamination of the soils had occurred consistent with the production of town gas from coal. Substantial foundations from the former gas works were also thought to be present. The purpose of the survey was to assess the site for buried foundations and evidence of contaminated ground.

The survey methodology

The survey was carried out with a Geonics EM31 ground conductivity meter collecting data at 1m centres along transects 2m apart. Both quadrature (conductivity) and inphase (metal detecting) data for the vertical dipole position only were collected. This provided "imaging" to a max depth of 6m.

Imperial Wharf 1.jpg
Imperial Wharf 3.jpg

The results

The survey found two extensive blocks of foundations some 35m long and 10m wide separated by some 20m. The inphase data shows a marked level of activity. This suggests the foundations may contain structural steelwork or heavy reinforcing. Around the easterly foundation is a marked "halo" of lower conductivity readings. This was interpreted as a pollution plume probably associated with the former use of the site as a gas works.