Geophysical Survey Services in St. Louis & Southern Illinois
Understanding subsurface conditions is critical to the success of any construction, infrastructure, environmental, or development project. Geophysical surveys provide a non-invasive way to investigate underground features, identify potential risks, and gather valuable site data before excavation or construction begins.
At Quality Testing & Engineering (QTE), we provide professional geophysical survey services throughout the St. Louis Metro Area and Southern Illinois. Our experienced team utilizes advanced technologies to help engineers, developers, municipalities, and contractors make informed decisions while reducing uncertainty and project risk.
What Is a Geophysical Survey?
A geophysical survey uses specialized instruments to evaluate subsurface conditions without extensive drilling or excavation. By measuring variations in physical properties beneath the ground, geophysical methods can reveal important information about soil, rock, groundwater, buried structures, voids, and other underground features.
These surveys are often used to supplement traditional geotechnical investigations by providing broader site coverage and helping identify areas that may require further exploration.
Benefits of Geophysical Surveys
Geophysical surveys offer several advantages for project owners and design teams:
- Non-destructive site investigation
- Faster evaluation of large areas
- Reduced drilling and excavation costs
- Improved understanding of subsurface conditions
- Identification of underground anomalies
- Enhanced project planning and design
- Reduced construction risk
- Support for environmental and infrastructure projects
By identifying potential issues early, geophysical surveys can help prevent costly delays and unexpected field conditions during construction.
Corporate Office
803 W State St, O’Fallon, IL 62269
(618) 632-9900
(618) 632-9922
Regional Office
(By appointment only.)
206 S. Linn Ave. Wentzville, MO 63385
(636) 332-1153
(636) 332-5781
Our Geophysical Survey Capabilities
Ground Penetrating Radar (GPR)
Ground Penetrating Radar uses electromagnetic signals to detect and map underground features. GPR is commonly used for:
- Utility locating
- Concrete scanning
- Rebar detection
- Void detection
- Pavement investigations
- Underground storage tank identification
- Subsurface structure mapping
GPR provides real-time data while minimizing disruption to existing facilities and operations.
Electrical Resistivity Surveys
Electrical resistivity methods measure how electrical current moves through subsurface materials. This technique can be used to identify:
- Bedrock depth
- Groundwater conditions
- Sinkholes and voids
- Soil stratification
- Buried features
- Environmental contamination pathways
Resistivity surveys are particularly valuable for environmental investigations and geotechnical evaluations.
Seismic Surveys
Seismic methods evaluate subsurface conditions by measuring how seismic waves travel through the ground.
Applications include:
- Bedrock profiling
- Rippability studies
- Foundation investigations
- Transportation projects
- Site characterization
- Infrastructure planning
Seismic testing provides important information about subsurface material properties and engineering conditions.
Utility Detection & Mapping
Accurately locating underground utilities is essential before excavation begins. Our geophysical survey services help identify:
- Water lines
- Sewer systems
- Electrical conduits
- Gas lines
- Telecommunications infrastructure
- Unknown underground obstructions
Proper utility mapping improves safety and reduces the risk of costly utility strikes.
Industries We Serve
QTE provides geophysical survey services for a wide range of industries and project types, including:
Commercial Development
Support for office buildings, retail centers, warehouses, and industrial facilities.
Transportation Projects
Roadways, bridges, highways, airports, and transportation infrastructure.
Municipal Projects
Water systems, sewer improvements, utility upgrades, and public infrastructure.
Environmental Investigations
Site assessments, contamination studies, groundwater evaluations, and remediation projects.
Energy & Utilities
Power generation, transmission systems, substations, and utility corridors.
Educational & Institutional Facilities
Schools, universities, healthcare campuses, and public facilities.
Why Choose QTE?
For decades, Quality Testing & Engineering has provided dependable engineering and testing services throughout the St. Louis region and Southern Illinois. Our team combines advanced technology with practical field experience to deliver accurate, actionable data that supports successful project outcomes.
Clients choose QTE because we offer:
- Experienced engineering professionals
- Advanced geophysical equipment
- Fast response times
- Clear reporting and recommendations
- Comprehensive testing and consulting services
- Local knowledge and regional expertise
Our goal is to help clients better understand subsurface conditions so they can move forward with confidence.
Request a Geophysical Survey
Whether you’re planning a new development, evaluating existing infrastructure, or investigating subsurface conditions, QTE can provide the geophysical survey services you need.
Contact Quality Testing & Engineering today to discuss your project and learn how our geophysical survey solutions can support your goals.
QTE can help you clean up contaminants and bring you into compliance as quickly and cost-effectively as possible.
Quality Testing & Engineering, O'Fallon, IL / St. Louis, MO
Quality Testing & Engineering, with construction testing and engineering offices in O'Fallon, Illinois and Wentzville, Mo, serves the St Louis, Missouri metropolitan area as well as areas of Southern Illinois including O'Fallon, Illinois, Edwardsville, Illinois, Alton Illinois, Belleville, Illinois, Troy, Illinois, Columbia, Illinois, Scott Air Force Base, Illinois and other areas. We provide construction testing, environmental consulting and testing, geotechnical exploration, construction materials testing and other environmental services to the St Louis area, including Wentzville, Missouri, O'Fallon Missouri, St Louis County as well as all areas of Southern Illinois.
Quality Testing and Engineering products range in size from residential homes to Industrial/Refineries, heavy industrial projects such as power plants, refineries and factories. QTE works in commercial, educational, institutional, industrial, recreational, refinery, transportation and warehousing projects.