Tetra Tech, Inc. (NASDAQ: TTEK) announced today that it has been awarded its third consecutive contract to support the U.S. Environmental Protection Agency’s (EPA) Regional Superfund Program serving Iowa, Kansas, Missouri, Nebraska and nine tribal nations. Through the Superfund Technical Assessment and Response Team (START IV) contract, Tetra Tech will provide technical support services including emergency preparedness and response, assessment and inspection, and data management. This $50 million, single-award contract is for a five-year period. “Tetra Tech has been supporting EPA’s START program since 1995,” said Dan Batrack, Tetra Tech Chairman and CEO. “We are committed to continue our longstanding support to EPA in providing rapid response for managing hazardous substances that can pose a threat to human health or the environment.” 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.