seismic refraction

Advanced Geoscience, Inc. is an international geoscience field services and consulting firm based in Los Angeles, California and Reno, Nevada USA, established in 1997. The firm is staffed by geophysicists, geologists, and hydrogeologists who perform subsurface geophysical and geological investigations, groundwater, mineral, and oil and gas exploration, near-surface geophysical surveys for geotechnical studies and underground construction, and non-destructive evaluation of earth structures such as dams, levees, tunnels, harbor bulkheads, and concrete pile

borehole seismic velocity (downhole, crosshole, tomography)concrete-scanning radardigital signal processingElectrical Resistivity Imagingelectromagnetic induction and ground conductivity surveysgravity and micro-gravity surveysground penetrating radar (GPR)Impact-Echoimpulse response techniquesinduced polarization surveysmagnetometer surveysmulti-channel analysis of surface waves (MASW)non-destructive evaluationseismic reflection surveyssonic pulse echosurface waveswaveform analysis

Burgess Engineering and Testing, Inc. is a locally owned and operated civil engineering firm and construction material testing laboratory based in Moore, Oklahoma. The company has worked on over a billion dollars worth of engineering and construction projects and provides geotechnical and construction material testing services with rapid response times.

asphalt mix designconcrete inspectionsconstruction material testingcoringdrilling and samplingFalling Weight Deflectometer testingfoundation designgeotechnical investigationsGround Penetrating Radarpavement designpavement evaluationsoil stabilization mix designsteel and welding inspectionsutility potholing

Certerra Subsurface delivers integrated subsurface investigation services including geophysical surveys, drilling, utility investigation, leak detection, and infrastructure assessment. The company provides technology-enabled testing, inspection, and certification services to assure quality and advance innovation in infrastructure, helping engineers, mine operators, and environmental professionals understand underground conditions and reduce uncertainty.

airborne surveysCCTV pipe inspectiondownhole geophysical imagingdrillingelectrical resistivitygeophysicsGround Penetrating Radarleak detectionpotholingSamplingutility surveying

GeoSearches Inc is a full-service geophysical company established in 2000, with 45 years of field experience behind it. It runs non-intrusive, non-destructive geophysical surveys nationwide and worldwide, having acquired data on four continents. Staffed offices are in Cleveland, Ohio and Knoxville, Tennessee. The company selects methods based on the question, target depth and ground conditions, and combines methods when a single dataset would be ambiguous.

3D laser scanningBorehole Loggingconcrete imagingelectrical resistivity tomographyElectromagneticsGround Penetrating Radarinfrared thermographyLiDARmagneticsMASWmicrogravityReMiscan to BIMseismic reflectionseismic site classificationsoil thermal resistivity testingSUETDEMutility locating

Geo SubSea, LLC was formed in 2015 to meet the consulting needs of the offshore industry and marine survey marketplace. The company provides marine survey and offshore industry consulting, with experience in all aspects of marine and freshwater projects from conception to operation to decommissioning, and has supported offshore wind projects globally.

benthic habitat mappingcoringdata processinggeophysical surveysgeotechnical investigationsgradiometerinspection with ROVs and AUVsinterpretationmagnetometermultibeam bathymetryoceanographic sensor deploymentpositioning and navigationproject managementseismic reflectionside scan sonartechnical report writing

GES is a group of professionals in geotechnical engineering, environmental consulting, and special inspection and construction materials testing. Founded in 1992 by Greg DeSart, the firm has four offices in Las Vegas, Reno, Mesquite and St. George, serving Nevada, Arizona and Utah. Its laboratory is AASHTO accredited and complies with ASTM standards.

asbestos surveysconstruction materials testingdrilling and well monitoringgroundwater monitoringPhase I and II ESA'srefraction microtremor (ReMi) evaluationsremediation planssettlement evaluationsslope stability analysissoil stabilizationspecial inspectionssubsurface exploration and testing

GeoTek Hawaii, Inc. is a group of innovative geoscientists, engineers, and skilled technicians who perform subsurface analysis using more efficient, less expensive, accurate, and minimal disturbance data acquisition methods.

auger drillingelectromagnetic surveyinggeotechnical/SPTGround Penetrating Radargroundwater samplinginjection and bioremediationin situ detectionmagneticsmonitoring wellssoil gas and soil vapor samplingsoil samplingsubsurface analysisutility locate/clearance