Desktop utility records search (survey type D)
This survey type would be in the form of a report identifying all known utility owners and their assets within an area including a list of affected and non-affected providers, along with any plans, maps, and diagrams provided. The deliverable would be in the form of a pdf document containing all information.
Site reconnaissance (survey type C)
This survey is accompanied by a desktop utility report (survey type D). It will involve a site reconnaissance visit to identify features that may indicate the presence of a service such as; manholes, valves, utility markers, street furniture and historic excavation scars. The deliverable will be in the form of a records overlay onto an existing topographical survey or OS base plan.
Detection (survey type B)
This survey is accompanied by a desktop utility report (survey type D). The detection survey is a non-penetrative survey conducted using at least 2 geophysical survey techniques. A consultation with the client during the quotation phase will identify the methodology used to conduct the survey. The final deliverable will be in the form of an AutoCAD file with a quality/confidence level assigned to all located services and accompanied by a written report and photographic record.
Verification (survey type A)
This type of survey can complement a detection survey (survey type B). By visual inspection, we can obtain further information to improve the confidence level and obtain additional information about a particular service. Visual inspection of a service can be via access points such as manhole / inspection chamber or by its excavation and exposure. For further details about confined space entry or utility excavation please contact us to discuss further.
Ground Penetrating Radar (GPR) Ground-penetrating radar (GPR) uses radar pulses to image the subsurface. This non-destructive method uses electromagnetic radiation in the microwave band (UHF/VHF frequencies) of the radio spectrum and detects the reflected signals from subsurface structures. The successful detection and mapping of buried utilities involve the combination of several techniques, the results of which are synthesized down to a single interpreted plot. The techniques and methodologies used will primarily depend on upon the required outcome for the survey, the site conditions and the type of pipes or cables being targeted.
Benefits: Comprehensive site investigation Non-intrusive and safer way of mapping Alleviates the need for digging and the disturbance of sensitive sites Advantages over other techniques Early detection of warning signs Quick, reliable diagnosis