Tetra Tech awarded $90 million USAF environmental contract The U.S. Air Force has awarded Tetra Tech Inc. (Pasadena, Calif.) a $90-million multiple-award contract to provide comprehensive environmental engineering support services throughout Europe and Africa. Under the 10-year contract, Tetra Tech will assist the U.S. European Command and the U.S. Africa Command in conservation, compliance, pollution prevention, remediation, and O&M. Tetra Tech will conduct risk assessments and advanced data analytics, in addition to preparing remedial designs to support environmental programs in air, drinking water, wastewater, stormwater, solid waste, and management of hazardous substances and waste. The company will incorporate sustainability elements such as energy efficiency, water conservation, and renewable energy into project designs.