Ground Penetrating Radar Surveys can assist with identifying underground buried anomalies such as underground storage tanks, voids, utility services, rebar, archaeological features and tunnels.
UTEC GPR surveyors are highly trained and experienced in the use of ground penetrating radar and the interpretation of the data.
Using post processing software we can offer you a full 3D view of your site underground showing any anomaly which may have been identified by the GPR.
Adopting a grid system on site, our surveyors will use industry leading radars such as the IDS Detector Duo to map out your site. Once completed our 3D post processing programme will give you a comprehensive overview of the site and highlight any underground object that may have been detected.
All Utility and GPR surveys are carried out in accordance with TSA guidelines up to and including a level 6 survey which offers the most comprehensive level of survey with the highest expectation of picking up all services and other underground obstructions. Intrusive investigation on selected targeted areas can be used to verify results.
Level 1; Desk top survey involving a search of existing utility records. This can be consolidated onto one plan in CAD and overlain onto base mapping as an option. Can be used to target more detailed fieldwork.
Level 2; A visual ‘walk-over’ survey carried out as a site visit. This would normally be in addition to a Level 1 survey and act as a reconnaissance on large projects to advise on the letting of the main utility survey. The site visit would be much enhanced if the results of the Level 1 survey were to hand for the walk over survey.
Level 3; Electro-magnetic location survey in passive and active mode with located services being marked onto ground surface. Includes cover lifting to allow line threading / sonding. Recorded manhole survey can be added as an option. Advisable to have Levels 1 & 2 surveys carried out in addition.
Level 4; A Level 3 survey but with the addition of Ground Penetrating Radar (GPR) in stake out mode to supplement EML results. Advisable to have Levels 1 & 2 surveys carried out in addition
Level 5; A Level 3 survey but with recorded close centered GPR over an agreed % of the whole site complete with off-site post data collection processing, analysis and interpretation. Line & depth marked onto digital site plans in CAD
Level 6; A Level 3 survey but with the addition of recorded GPR survey over 100% of the site with off-site post data collection processing, analysis and interpretation. Line & depth marked onto digital site plans in CAD. Intrusive trial holes to verify results can be added as an option.
The above information is based on extracts from: The Essential Guide to Utility Surveys (Detailed Guidance Notes for Specifying a Utility Survey), by The Survey Association.