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Geotechnical Exploration & Soil Testing Services

Are you looking for soil testing services in the St. Louis area? QTE explores below the surface of your potential site to arm your design professionals with the necessary data to provide you with the quality foundation you need to last the lifetime of your project. QTE is flexible enough to work with you to generate as much data as you require.

With decades of combined experience, our skilled team of geotechnical engineers, field staff, laboratory technicians, licensed geologists and certified scientist provide geotechnical services including field explorations, laboratory testing and foundation and site development recommendations. QTE’s geotechnical engineers are also trained to respond to a wide range of emergency situation soil-related issues including:

  • Failure Analysis and Corrective Action Recommendations
  • Soil Stabilization, Slopes and Sinkholes
  • Retaining Walls and Foundations

QTE explores the subsurface conditions to provide your design professionals with critical data for shallow and deep foundation design, ground improvement methods, seismic analysis, and flexible and rigid pavement design. QTE also performs global stability analyses of cut or fill slopes, which may include retaining walls. Our field staff has the experience and certifications to carry your project beyond the design phase and through construction.  Our firm is one of just a few accredited testing laboratories in Southern Illinois.

Our field staff has the experience and certifications to carry your project beyond the design phase, through construction and into the building you ultimately require. At QTE we are the experts in St. Louis Soil Testing services.

QTE also performs Environmental Testing & Consulting and Construction Materials Testing.

Subsurface Exploration

  • Traditional Drill Rig
  • Rotary Air Drill
  • Test Pits

Laboratory Geotechnical Testing

  • Triaxial Compression
  • Permeability
  • Shear Strength
  • Soil Density
  • Atterberg Limits
  • Unconfined Compression
  • Swell Pressure
  • Consolidation
  • Resistivity
  • Grain Size Distributions
  • Proctor Compaction Tests

Site Development Recommendations

  • Shallow Foundations
  • Auger Cast Piles
  • Drilled Piers
  • Rammed Aggregate Piers
  • Seismic Design Considerations
  • Settlement Potential
  • Shrink/Swell Potential
  • Mine Subsidence Potential
  • Influence of groundwater on the design and construction
  • Suitability of on-site soils for use in structural fill
  • Engineering criteria for placement of structural fill
  • Pavement subgrade recommendations
  • Suggested construction monitoring program for foundation construction

Construction Monitoring

  • Foundation observation
  • Controlled engineering fill density testing
  • Settlement monitoring
  • Soil stabilization recommendation and monitoring

St Louis Soil Testing Services For Construction

St Louis Soil Testing For ConstructionSt Louis contractors count on Quality Testing & Engineering when they need a geotechnical engineer or soil engineers who stand behind their work. Whether your construction project involves installing septic systems, pouring foundations or any other application, QTE can help.

Quality Testing and Engineering’s O’Fallon, IL and St Louis, MO offices can help you with your subsurface exploration requirements. We employ traditional drill rig technology as well as rotary air drill and can assist with test pits.

QTE uses in-house labs to conduct geotechnical testing. We can assist with triaxial compression testing, permeability testing, shear strength testing soil density and soil compaction testing as well as monitoring soil conditions. We can help with liquid limit or Atterberg limits testing, unconfined compression, swell pressure, consolidation, resistivity grain size distributions tests and Proctor compaction tests.

We work with all types of soil to determine moisture content and to help you determine what types of structures soil can support.

Builders in the St Louis area know that they can stand by our site development recommendations for shallow foundations, auger cast piles, drilled piers, rammed aggregate piers, seismic design considerations, settlement potential, determining soils ph level, shrink-swell potential and other considerations. We are experts at determining influence of groundwater on design construction as well as suitability of on site soils for structural fill. We can help you determine engineering criteria for placement of structural fill as well as making pavement sub-grade recommendations.

Our team of structural engineers, geologists and technicians have been advising on commercial and home build projects for decades. Consider QTE for soil sample analysis and soil construction analysis in the St Louis and Southern Illinois area.


QTE’s laboratory is overseen by Wayne Smith, Soil Scientist, and Hobson Fizette P.E.. The full-time and part-time engineering technicians and are AASHTO accredited and validated by the USACE.

The benefits of choosing QTE to provide laboratory services include:

  •  Competitive Rates
  • Ability to Meet Tight Deadlines
  • Pickup/Drop-off Services

QTE can help you clean up contaminants and bring you into compliance as quickly and cost-effectively as possible.

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



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.