Tetra Tech Awarded $24 Million EPA Brownfields Revitalization Program

Tetra Tech, Inc. (NASDAQ: TTEK) announced today that it was awarded a $24 million multiple-award, indefinite-delivery/indefinite-quantity contract to provide technical, analytical, and programmatic support services to the U.S. Environmental Protection Agency (EPA) Brownfields and Land Revitalization Program. Under the five-year contract, Tetra Tech will support EPA’s Office of Brownfields and Land Revitalization (OBLR) in its efforts to promote the assessment, cleanup, and revitalization of properties that are affected by the presence or potential presence of hazardous substances, pollutants, or other contaminants.

Tetra Tech will provide a variety of technical support services under the contract, including research and analytical support; program planning and reporting services; and communications, outreach, and training support, among other services.

About Tetra Tech ( www.tetratech.com)

Tetra Tech is a leading provider of consulting, engineering, program management, construction management, and technical services. The Company supports government and commercial clients by providing innovative solutions to complex problems focused on water, environment, energy, infrastructure, and natural resources. With more than 13,000 employees worldwide, Tetra Tech’s capabilities span the entire project life cycle.

Any statements made in this release that are not based on historical fact are forward-looking statements. Any forward-looking statements made in this release represent management’s best judgment as to what may occur in the future. However, Tetra Tech’s actual outcome and results are not guaranteed and are subject to certain risks, uncertainties and assumptions ("Future Factors"), and may differ materially from what is expressed. For a description of Future Factors that could cause actual results to differ materially from such forward-looking statements, see the discussion under the section "Risk Factors" included in the Company’s Form 10-K and 10-Q filings with the Securities and Exchange Commission.

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