Earthing drawings are sometimes of poor quality, defaced or have been lost. In these cases, it is difficult to carry out earthing assessments in CDEGS as the earth electrode layout is not known. For these situations, ERM is able to use electromagnetic location equipment and/or ground penetrating radar to locate buried earth electrode or any other services and produce new CAD layout drawings showing the located earthing and services.
Using a combination of an EML (electromagnetic locator) and GPR (ground penetrating radar) ERM via LSTC have the capability to complete an accurate PAS128 underground utility survey of utility/services including earthing.
With a variety of direct and induction methods earthing can be accurately traced and mapped out using an EML.
The GPR is also an essential tool in this process as it capable of locating broken or damaged services and non-conductive buried services which the EML cannot trace.