Tetra Tech, Inc. (NASDAQ: TTEK) announced today that it has been awarded a $100 million remedial action contract by the Naval Facilities Engineering Command’s Atlantic Division. Through this 5-year indefinite delivery/indefinite quantity contract, Tetra Tech will provide environmental remediation services primarily for the Department of the Navy and Marine Corps installations. This single award contract supports the Navy's primary environmental remediation program covering the Atlantic area of responsibility including North Carolina, Virginia, Maryland, Connecticut, Maine, Massachusetts, the District of Columbia, Pennsylvania, West Virginia, Africa, and Vieques, Puerto Rico. 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 14,000 staff 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.