Tetra Tech provides laboratory services in the water, geotechnical, and infrastructure sectors. Tetra Tech uses its in-house laboratory facilities to provide solutions in the water and infrastructure sectors. Our researchers conduct both chemical and biological analyses for municipal, commercial, and private clients. 

Toxicological Analysis 

Tetra Tech conducts biological and toxicological analyses at its state-of-the art ecological testing facility, which is accredited through the National Environmental Laboratory Accreditation Program (NELAP). Tetra Tech’s ecological testing facility routinely performs:

  • Aquatic, sediment, and soil laboratory toxicity tests for site water, sediments, soils, chemicals, wastewater effluents, and leachates
  • In-situ toxicity tests using either surrogate or indigenous species in acute or chronic toxicity exposures
  • Water effect ratio toxicity studies
  • Toxicity Identification/Reduction Evaluation (TIE/TRE) testing
  • Bioaccumulation studies

Tetra Tech’s ecological testing facility routinely cultures surrogate test species and has tested more than 25 different species including amphipods, polychaetes, fish, annelids, insects, and crustaceans.

Biological and Chemical Analysis

Tetra Tech’s staff also has decades of experience designing and implementing biological assessment protocols, including those for field sampling, laboratory processing, data management, and indicator analysis for evaluating ecological health. Our field technicians perform ecological assessments for streams, large rivers, lakes and reservoirs, wetlands, and estuarine and near-coastal waters at spatial scales ranging from regional to national levels. 
 
Our researchers analyze water samples at municipal facilities to ensure compliance and optimize facility performance. Analytes may include pH, turbidity, conductivity, chlorine residuals, ammonia, and many others that are commonly tested for water characterization. In addition to in-house laboratory work, testing can be performed in the field using portable equipment, such as pH probes or ultraviolet (UV) meters. Our drinking water laboratory carries out studies for clients based on their design needs including, but not limited to, jar testing for coagulation and flocculation, disinfection by-product (DBP) testing, and chlorine demand/decay studies. 
 
Tetra Tech provides bench-scale testing and treatability studies for industrial and municipal clients, where we design and conduct experiments to help clients determine the best treatment processes for consistently removing contaminants of concern to below target concentrations. These tests serve to guide our clients in developing the best processes for designing new water and wastewater treatment facilities. For existing treatment facilities, Tetra Tech helps clients optimize treatment processes to minimize chemical dosages and reduce waste to save on overall operating costs.

Geotechnical Analysis

Tetra Tech’s geotechnical testing facilities in the United States and Canada are among the most advanced in North America. We have provided a wide range of testing services directly to owners, contractors, manufacturers, government agencies, and other consulting firms. Fully equipped facilities are available for materials testing, geotechnical testing, and product testing.
 

Tetra Tech’s fully automated geotechnical laboratory in the United States includes most geotechnical tests (strength, permeability, compressibility, classification etc.) required for designing infrastructure and resource projects. The laboratory has been inspected and qualified by the U.S. Army Corps of Engineers for geotechnical testing and the Geosynthetic Accreditation Institute Laboratory Accreditation Program for geosynthetics testing and has a United States Department of Agriculture soil permit to import foreign soils for testing purposes.

Tetra Tech can handle significant volumes of the common laboratory tests including, but not limited to, the following:

  • Compressive strength testing of concrete cylinders utilizing calibrated testing machines
  • Particle size analysis on aggregates or granular soils (sieve analysis)
  • Determination of natural moisture content in soils
  • Atterberg Limits test (plasticity index testing)
  • Standard or modified proctor test for compaction testing
  • Measurement of mass, volume, and density of concrete, asphalt, or soil samples
  • Properties and strength analysis of asphalt, binders, cement, aggregates, concrete, and soil

Tetra Tech’s Canadian laboratory facilities are recognized and certified by Canadian Council of Independent Laboratories (CCIL) as Category 0, I, and II concrete testing laboratories in accordance with the Canadian Standards Association (CSA) Standard A283. Our Canadian laboratory facilities are also recognized in asphalt testing for Type A (Marshall Design), Type B (Marshall and Superpave Mix), with Type C, D and Superpave properties for aggregates.

Related Projects

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Characterization Study

Characterization Study of Commercial Harbor Dredged Sediment

Determining toxicity and bioaccumulation potential for suitability of open ocean disposal of sediment dredged from five commercial harbors in Hawaii

Wing Rehabilitation at Suncor Plant

Wing Wall Rehabilitation at Suncor Plant 85

Conducting mechanically stabilized earth wall rehabilitation design and construction monitoring of three walls at Suncor’s oil sands facility

Alaska Pipeline Project, Geotechnical and Engineering Services, Canadian Pipeline Section

Alaska Pipeline Project, Geotechnical and Engineering Services, Canadian Pipeline Section

Provided Arctic engineering services through the development stage of the Yukon portion of the Alaska Pipeline project

EPA Aquatic Resource Surveys

U.S. National Aquatic Resource Surveys

Assessing the condition of the United States’ lakes and streams