Ground Penetrating Radar (GPR) is a Geophysical method that uses radar pulses to image the subsurface. For Engineering application, it locates Buried structures, Utility lines and Studying soils and bedrock. For Environmental remediation, It is use to define Landfill, Contaminant plumes and other remediation sites.

Soil Resistivity is a measure of how much the soil resists the flow of electricity, soil resistivity measurements have a three fold purpose.

1. Data is used to make sub-surface Geophysical Surveys as an Aid in identifying Depth to Bedrock and other geological phenomena.
2. Resistivity relates to an increase in corrosion activity.
3. Soil Resistivity directly affects the design of grounding system.

SEISMIC REFRACTION SURVEY( ASTM D5777)
The seismic refraction method is based on the measurement
of the travel time of seismic compression waves  refracted at the interfaces between
subsurface layers of different velocity

850 meters Seismic Refraction Survey Limay Bataan

MULTICHANNEL ANALYSIS OF SURFACE WAVE (MASW)

 One of the seismic survey  methods evaluating the elastic condition (stiffness)

of the ground for geotechnical engineering purposes which utilized Shear wave in the process.

• MASW DATA ACQUISITIONS

• 2D MASW active survey Cement Plant,Norzagaray,Bulacan

•   1D MASW Active and Microtremor(Passive) survey Power plant,Toril Davao

Equipments: ABEM, Sweden;4.5 Hz,10Hz Gisco geophone,USA

CROSSHOLE SEISMIC (ASTM D4428)
The seismic cross hole method provides a designer with information pertinent
to the seismic wave velocities of the materials in question. This data maybe
used as input into static/dynamic analyses, as a means for computing shear modulus, young’s
modulus, and Poisson’s ratio, or simply for the determination of anomalies

• v  Crosshole test power plant Cagayan

DOWN HOLE SEISMIC TEST (ASTM D7400)

The method provides  in-situ P and S wave velocities essential for use in geotechnical foundation designs. The results are used in analyses of soil behavior in both static and dynamic. Another use is to estimated shear wave velocities in geotechnical designs in liquefaction assessment of soils.

Manufacturer: Soils Engineering & Geophysics, Inc. – Mississippi, USA