Borehole Siting Equipment
EnviroXcellence Services uses a combination of electromagnetic, resistivity profiling, magnetics and vertical electrical soundings to investigate the different rock types and associated aquifers.
Resistivity Profiling
Constant separation surveys are conducted at 20m and 40 01 station spacing to confirm magnetic data. Reference surveys may be carried out along existing boreholes to establish the array parameters, which are applicable to a particular area. The overall profiling depth is at least equal to the average water strike depth in an area.
Vertical Electrical Sounding (VES)
Vertical Electrical Soundings are carried out at anomalies identified from the profiling techniques to determine formation thickness and depths. As with the resistivity profiling where possible reference surveys are carried out at existing boreholes for data calibration purposes.
Electromagnetics
Electromagnetic readings are taken every 10m along the geophysical profile at different frequencies per station, with each frequency having the IN and OUT phase readings. The overall profiling depth is maximum 300m, depending on the frequencies selected.
Magnetic Traversing
Magnetic data will be collected at 10 01 station spacing to determine the lateral extent and dimensions of dykes, fractures, shear zones and faults.
Our geophysical equipment and software that is issued in geophysical surveys including groundwater investigations:
Equipment
- l x Apex Parametrics Max-min II
- 2 x G5 Magnetomete rs
- 3 x G41 Resistivity Meter
- 4 x Tarametre(VES)
Software
- MAG2DC software for modelling magnetometer data
- VES for Windows Schlumberger Soundings Modelling
Inversion Software for resistivity data
Aquitest
- Geosoft Oasis Montaj – processing and modelling software
- Interpex software – Resixplus