Underground Services Location (USL) - SiGeo Concrete
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Underground Services Location

Ensure safe incident-free working and minimise financial losses, risks of damaging underground services on your all building and excavation projects.


Depending on the project objectives, we provide professional underground services location in accordance to AS5488-2013 Subsurface Engineering Standard, tailored to purpose, site and geographic location including highly-congested urban environment.


Understanding your needs, intended works, anticipated risk levels helps us suggest suitable risk management approaches that meet AS5488-2013 legal requirements, on-time and within project budget, as classed below.


  • Class-A survey where the Utility is (sighted, located, potholed, physically sighted and measured)


  • Class-B (traced, laterally, with depth detail, between two known points


  • Class-C: aligned from surface features


  • Class-D: any other method (E.g. DBYD plans only)


Profit, Safety and Risk Management


  • Personnel and equipment safety


  • Minimize risks, injuries and safety related incidents


  • Avoid service interruption, penalties and repair costs of damaged services


  • Reduce down-time


  • Work by excavation legislation


  • Knowing the risks aids better planning


Our underground services location procedure, marking and reporting is in accordance to accordance to AS5488-2013 Subsurface Engineering Standard. Depending on the risk management objectives / specifications, site location, depth and nature of targets, we utilise medium-to-low frequency (80-900 MHz frequency) Ground penetrating radar (GPR) technology to survey underground targets.

Electromagnetic Induction (E1MI)

Buried services may include metallic and non-metallic services including PVC conduits, Optical fibre lines etc.  Depending on size and depth of target, GPR may miss detection of PVC and small non-conductive objects. In addition to GPR, we utilise Electromagnetic induction (EMI) techniques using a transmitter (Tx) / receiver (Rx), tracing wire rods, Sondes for active locating or passive locating of all services including: Live, dead, inactive, abandoned, metallic or non-conductive.