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Superior service ...practical solutions!






In-house, state-of-the-art drilling equipment, methods and personnel. "

GSI's Drilling Division is staffed by highly-trained professionals who have experience with the Midwest's subsurface materials. Field personnel are all required to complete 40 hours of OSHA safety training and annual refresher courses. First Aid, CPR, Fire Extinguisher training and more are also required.

GSI maintains a large fleet of subsurface exploration equipment including truck and track-mounted drills, cone penetration and geoprobe equipment, and more. This in-house drilling capacity allows us to mobilize the right equipment and crew within hours. That means lower overall costs and increased efficiency matter how large your project.

For forty years GSI has offered a comprehensive package of outstanding services including innovative solutions to difficult drilling problems, highly trained, experienced drillers, efficient scheduling, and less down time than others in the industry.

GSI maintains a fleet of drill rigs of various sizes and types including geoprobe direct push equipment and a cone penetromteter with full support equipment. As technical experts in the industry, GSI offers innovative technologies such as cone electrometer testing with our Mobile In-Situ Lab to provide immediate results through on-site data analysis and reduction.

GSI uses cone penetration testing (CPT) to quickly develop soil profiles. Using a 20 ton truck- mounted CPT, GSI can determine rapid and economical determinations of soil stratigraphy, relative density, strength and hydraulic information such as hydraulic conductivity, static and pore pressures. The advantages of CPT are:  

Detailed hydrogeologic profiling at an avg rate of 400-500 ft / day

Continuous logs of site lithology

Real-time data

Piezometric data in addition to geotechnical parameters

In today’s fast-paced environment, owners, architects, engineers and contractors need high quality geotechnical information as quickly and inexpensively as possible. With Cone Penetration Testing, GSI can meet those needs with confidence.