PAS 128 Surveys

GEOTEC Surveys detect and accurately record the position, depth, route and type of buried services and utilities in line with PAS 128, detection level B, using ground penetrating radar (GPR), radio frequency detection (EML), cover lifting & topographical survey techniques. 

This includes water, power, gas, telecommunications, fibre optics, drainage and other sub-surface features. 

Survey works can be completed using cart-based or vehicle mounted GPR Systems, depending on the site characteristics and the PAS methodology required for that particular site.

A manhole photograph schedule and PAS 128 survey report will also accompany our final survey results drawing (in PDF and AutoCAD formats). 

By allocating a quality score to each detected service, we are able to demonstrate to the client, the confidence level with which this particular feature has been detected and to what accuracy tolerance. This is invaluable to the design process. 

Want to know more about PAS 128 Surveys?

PAS 128 Example Survey Results & Detection Levels

Our experienced surveyors are multi-trained in the on-site disciplines of Radio Frequency Services Tracing, GPR & Topographical Surveying as well as the office based functions of GPR data post processing & AutoCAD 2D & 3D. 


An example of a survey where we have several unidentified ground penetrating radar targets present, as well as confirmed buried services and utilities.

This tool also allows us to confirm the presence of metallic and conductive services that have already been detected through radio frequency detection / electro-magnetic locating (RFD / EML).

GPR Surveys

Vehicle Mounted GPR Surveys

Utility Mapping / Buried Services Surveys

Service Clearance / Marking Out Surveys

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