SERVICES

• preliminary geotechnical investigations
• design-level geotechnical engineering investigations
• slope and embankment stability studies
• pavement analysis and design
• seismic surveys
• floor flatness studies
• pile load test and driving observations
• drilled pier observations
• site-specific earthquake ground response analyses
• foundation investigations
• bedrock excavation and rippability studies
• due diligence feasibility studies
• geotechnical engineering laboratory services

• geologic hazards investigations
• engineering geologic investigations 
• liquefaction evaluations
• landslide investigations and mitigation
• rock and soil slope stability investigations
• instrumentation installation and analysis
• field geophysical investigations
• seismic refraction surveys – rippability studies and groundwater studies
• quarry evaluations and reserve estimates
• construction geology

• soil and groundwater investigations
• review of geotechnical engineering and engineering geologic reports
• distressed structure investigations 
• review of project civil and structural engineering plans and details
• investigations of materials properties of existing structures
• engineering and geologic analyses
• preparation of geotechnical remediation reports
• preparation of drainage improvement plans
• review of remediation plans prepared by contractors and engineers
• assistance in mediation, arbitration or litigation proceedings
• expert witness testimony
• inspection and testing during remediation construction 
• litigation support and expert witness testimony

TerraTek produces comprehensive Phase I Environmental Site Assessment reports that exceed the minimum requirements of the American Society of Testing and Materials (ASTM) E1527-13 and the US EPA’s All Appropriate Inquiry (AAI) standards. Our identification of environmental risk and remediation measures enables proposed development plans and project funding to proceed smoothly, while helping clients reduce liability and complete due diligence requirements, including CERCLA’s innocent landowner, contiguous property owner or bona fide prospective purchaser defense. 

• Phase I environmental site assessments
• Phase II environmental site assessments

Our  Construction Testing & Inspection Division provides full-scope geotechnical, materials testing, and third party inspection services utilizing our certified/accredited/licensed laboratory facilities and personnel.  These services include:

•  Soils compaction testing 
•  Stabilized base and subbase materials inspection 
•  Rigid and flexible pavement construction testing 
•  Deep foundation excavation inspection 
• Pile driving inspection
• Asphalt compaction testing 
• Fireproofing inspection
•  Reinforced concrete inspection 
•  Masonry inspection 
•  Compressive strength of concrete 
•  Compressive strength of masonry, mortar, and grout 

TerraTek maintains in-house soil and materials testing laboratories managed by registered civil engineers. Tests are performed in conformance with ASTM and AASHTO test methods in accordance with local transportation and building code standards. Some of the laboratory testing services we provide are: 

• Atterberg Limits Tests (ASTM D4318)  
• Grain-Size Analyses (ASTM D422)
• Grain-Size Analyses with hydrometer (ASTM D422)  
• CBR Testing (VTM-8)
•  Standard Proctor Moisture Density Relationships (ASTM D698)
• Modified Proctor Moisture Density Relationships (ASTM D1557)
• Natural Moisture Content  
• Direct Shear (ASTM D3080)
• Compressive strength testing of concrete cylinders (ASTM C39)
• Compressive Strength of Mortar Cubes/Cylinders (ASTM C170)
• Compressive Strength of Grout Prism Specimen (ASTM C1019)