Tetra Tech, Inc.

Tetra Tech, Inc., doing business as Tetra TECH Em Inc., is a large global consulting and engineering services firm headquartered in Pasadena, California, with a registered office in Oakland, California. The company provides comprehensive environmental assessment, remediation, compliance, and engineering services to federal agencies, with particular expertise in site investigations, cleanup verification, technical design services, and project management for complex environmental remediation projects. Tetra Tech specializes in supporting federal environmental programs, especially those focused on abandoned uranium mine assessments and remediation on and around the Navajo Nation in the Southwest.

Through its federal contract awards, Tetra Tech has demonstrated extensive capabilities in providing technical support for environmental remediation and site assessment services across multiple EPA regions and the U.S. Army Corps of Engineers. The company's work includes conducting removal site evaluations, engineering evaluations and cost analyses, remedial investigation and feasibility studies, time-critical and non-time-critical removal action planning and oversight, cleanup verification of temporary removal actions, and community involvement outreach services. Tetra Tech has received numerous delivery orders from the EPA Region 9 and EPA Region 6, with contract values ranging from approximately $96,000 to $14.3 million, addressing abandoned uranium mines, contaminated structures, and legacy mining sites in New Mexico, Arizona, and Utah. The company frequently partners with minority-owned and small business subcontractors, including Native American-owned enterprises such as Iina Ba Inc., Sundance Consultants LLC, and Dinetahdoo Cultural Resources LLC, as well as woman-owned small businesses including Gel Laboratories LLC and Environmental Data Services Limited, to support specialized functions such as laboratory analysis, cultural resource surveys, data validation, and field equipment rental. Tetra Tech's work is performed on a time and materials basis without small business set-aside designations, reflecting its status as a large business contractor, and has included task orders for environmental remediation services at formerly used defense sites through the U.S. Army Corps of Engineers.

Tetra Tech holds two primary federal contract indefinite delivery vehicles. The company's principal IDIQ is the $65 million Navajo Area Uranium Mines Response Assessment and Evaluation Services II (NAUMRAES II) contract awarded by EPA Region 9 on April 7, 2023, with an ultimate completion date of April 9, 2028. Under this single-award IDIQ, Tetra Tech has received over 30 delivery orders supporting technical assessment services for the investigation and remediation of abandoned uranium mines on and around the Navajo Nation in EPA Regions 6 and 9, with task order values ranging from approximately $74,000 to $14.3 million and cumulative awarded value exceeding $70 million. The NAUMRAES II contract authorizes work including removal site evaluations, engineering evaluations and cost analyses, remedial investigation and feasibility studies, technical design services, cleanup verification activities, data and records management, community involvement outreach, and development of program standards and training. Additionally, Tetra Tech holds a $50 million Multiple Award Task Order Contract (MATOC) for Environmental Remediation Services awarded by the U.S. Army Corps of Engineers Albuquerque District on September 26, 2022, with performance extending through September 25, 2027. This shared-capacity multiple award contract supports environmental remediation activities including site investigations, remedial actions, military munitions response, and environmental compliance services, with a $2,500 minimum task order floor. Under both contract vehicles, Tetra Tech has mobilized diverse subcontracting teams incorporating minority-owned, woman-owned, and small disadvantaged businesses to deliver specialized environmental assessment, laboratory, cultural resource, and technical support services essential to federal environmental remediation programs.