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