For the Geophysical/Environmental Investigations, the site is generally set up in a grid format in order to collect the data in a methodical manor which allows for optimal data management.
Grid scans are then collected along the grid lines at appropriate intervals for the purpose of the investigation. The data scans are analyzed, by the technician, as they are collected on site. The data is also saved on a memory card for future reference if needed.
Target anomalies are delineated on site for visual interpretation. The collected data may also be analyzed closer with State of the Art data processing software if needed. Data files and still images of target anomalies along with site pictures may be incorporated into an investigation report if requested.
All GPR Investigations and Reports are performed by an Environmental Professional with more than 15 years of experience in the industry and proficient with interpreting GPR data, allowing for detailed superior results.
There are many applications suitable for GPR, including but not limited to:
Cemetery Investigations, Buried Wells and Septic Systems, Forensics, Archaeological Artifacts, Drain Tiles, Plastic Irrigation Lines, Buried Survey Markers, Sewer & Water mains and leads, Environmental Assessments and more.
The picture on the left shows an investigation being conducted with the GPR at a Cemetery, detecting unmarked graves.
Ground Penetrating Radar (GPR)
GPR detects differences in dielectric constants beneath the surface.
The control unit emits a signal which is then amplified by the antenna and transmitted through the surface. When the signal meets the subsurface materials, it is returned back through the system to the control unit based on the strength, or amplitude, of the reflection and determined by the contrast in the dielectric constants and conductivities of the materials.
The results are displayed on the monitor as a 2 dimensional image of the subsurface. The signal penetrates farther in more permeable materials and returns quicker in dense materials. Click here for further information on how GPR works.
We utilize State of the Art GPR equipment manufactured by Geophysical Survey Systems (GSSI), the World Leader in Ground Penetrating Radar Technology.
The data files collected with the GPR equipment are kept on file for future reference and may be incorporated in a report if requested. However generally the results of the investigation are portrayed on site with actual identifiable marks that can be visibly seen and interpreted on site by anyone. The anomalies seen in the data are marked out on the ground and the known utilities are color coded to industry standards.