Pyramid Geophysical Services

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Underground Storage Tank (UST) Investigations Using Geophysics

EM61 contour map for UST

Pyramid Geophysical Services has performed a multitude of Underground Storage Tank (UST) investigations throughout North Carolina using geophysical methods. These metallic USTs are often left behind at old fuel service stations that have closed down. Old home heating oil tanks are also often left in the ground after … [Read more...]

Filed Under: Case Studies Tagged With: EM, geophysics for UST, GPR, north carolina geophysics, Underground Storage Tank, UST

Seismic (MASW) Surveys to Investigate Top of Rock

MASW top of rock

One of the most common applications of near-surface seismic testing is to identify the depth of the top of a bedrock unit in the subsurface. The two most effective seismic methods associated with this application are: 1) Seismic refraction, and 2) Multi-Channel Analysis of Surface Waves (MASW). Most people who are … [Read more...]

Filed Under: Case Studies Tagged With: geophysics, MASW, north carolina geophysics, seismic, shear wave, top of rock

Slope Stability Analysis Using Geophysics

void under road

Pyramid Geophysical Services was contracted to assist in a comprehensive evaluation of subsurface geologic and hydrogeologic conditions along a causeway in South Carolina. The causeway was experiencing slope failures and ground collapses. These failures were thought to be the result of both the presence of buried … [Read more...]

Filed Under: Case Studies Tagged With: electrical resistivity, electromagnetic, GPR, ground collapse, MASW, seismic, slope geophysics, slope stability analysis, voids

Ground Penetrating Radar (GPR) Investigation of Shallow Bedrock

gpr bedrock

Ground penetrating radar (GPR) is an effective tool to rapidly image shallow bedrock under the right conditions. This project was conducted along a proposed pipeline alignment where geotechnical boring logs showed variable bedrock depth along the entirety of the alignment. The alignment consisted of a variety of ground … [Read more...]

Filed Under: Case Studies Tagged With: bedrock investigation, GPR, GPR rock, ground penetrating radar

Geophysical Ground Conductivity Mapping

conductivity map of coal ash

The use of electromagnetic (EM) geophysical methods to evaluate ground conductivity variations is an effective tool to resolve environmental issues. However, the EM profiling instruments commonly used (such as the Geonics EM31 ground conductivity meter) for such applications provide depth-averaged conductivity values … [Read more...]

Filed Under: Case Studies Tagged With: coal ash, conductivity, earth conductivity, electrical resistivity, electromagnetics, EM31, fly ash, geophysics, north carolina geophysics, resistivity

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Certifications and Affiliations

GSA Contract

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AFFILIATED COMPANIES

LPT Systems

Provider of lubrication, pump and tank systems and equipment, sales and service

Pyramid Environmental Services

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503 Industrial Avenue, Greensboro, NC 27406

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