Utility - GPR Surveys

Ground Penetrating Radar (GPR)

At Precision Surveys our state of the art Ground Penetrating Radar equipment and trained GPR service specialists are experienced in locating underground storage tanks, utility marking and locating service, locating voids, plastic pipe, and locating underground objects, no matter the material composition. GPR is a safe, non-invasive geophysical investigation method.

The company is fully insured and is also completely covered for general liabilities.

Electromagnetic Detection (EM)

Radio Frequency detection is used for locating conductive utilities such as electrical lines, steel, copper lines etc. In order to detect these utilities using electromagnetic survey techniques, a radio frequency is induced onto the utility.
 
The principle works on the basis that a current flowing along a conductor creates a magnetic field, which extends around the conductor in concentric circles. A receiver coil can be used to detect the amplitude of this magnetic field. The amplitude varies depending on the position and orientation of the receiver within the field.
 
Moving the receiver from side to side it is possible to follow the maximum signal response and therefore, the line of the buried service. This method can be used to locate electrical cables by traversing the object area in a grid pattern to scan for buried power cables. Telecom and communication cables can also be traced from chamber to chamber by inducing a current of known frequency onto a conductor with a current generator and then scanning the ground with a receiver set at the same frequency to locate their position and depth.
 
The depth of the utiltiy can be determined when an induced signal is used on a specific pipe or cable. The accuracy of this depth reading is in the order of 10% of the depth.
 
 

We can cater surveys to a variety of budgets, with the following options available:
 

• Radio Frequency / Passive Techniques (RD 8000 Locators) (Metallic Pipes and Cables)
• Manhole lifting and recording
• Ground Penetrating Radar (2D and 3D GPR – Metallic & Non-metallic Pipes / Conduits)
• Conductive Line Tracing (Non-metallic Pipes / Conduits)
• Radio Frequency Sonde Tracing (Non-metallic Pipes / Conduits)
• Full site survey (Utilities and Topo)