NSN provides a multitude of geotechnical services for pre-development investigations as well as subsidence damage evaluations, sinkhole investigations, and soil stability issues.  Our team of highly trained geologists has years of experience utilizing both traditional investigative methods and cutting edge technology to provide our clients with detailed and accurate answers to geotechnical problems.  Some of our services include:

• Geologic mapping
• Soils analysis
• Soil density determination for building foundation design
• Erosion potential
• Subsidence evaluations
• Sinkhole investigations
• Geophysical Surveys
• Multi-Electrode Electrical Resistivity (MER) [more info]
• Multi-Channel Analysis of Surface Waves (MASW) [more info]
• Ground Penetrating Radar
• Cone Penetration Testing (CPT)
• Standard Penetration Testing (SPT)
• Rock Coring
• Floor slab elevation mapping

Our combined use of geophysics and standard drilling methods provides a unique approach to subsurface evaluations of project sites.  The use of geophysical surveys allows us to rapidly map a specific area and identify anomalous subsurface features (fractures, cavities, ravel zones, etc).  The results of the survey enable us to design a focused drilling program that provides a significant cost savings to the client, while at the same time producing all of the necessary geotechnical information to the project engineer for a proper design.  Our Cone Penetration rig provides innovative drilling technology to our clients.  This system records soil densities and engineering properties (pore pressure, local friction, etc) every tenth of a foot in the subsurface, resulting in the highest resolution data sets possible for geotechnical investigations.  NSN also incorporates SPT drilling into many of our projects where physical samples of soils/rock are required to ground-truth geophysical data or undergo laboratory testing for engineering properties (shear strength, compressibility, etc).  NSN has performed both large-scale geotechnical investigations throughout the Caribbean for resort development, as well as hundreds of sinkhole investigations throughout the state of Florida on residential properties and public roadways.