Envirogen's core business is the application of biotechnology to remediate contaminated sites and waste streams. Envirogen specializes in proprietary methods of remediating and treating complex contaminants including ammonium percholorate (solid propellant for rockets and missiles), MTBE (fuel additive used to make gasoline burn cleaner) and 1,4-dioxane (explosives), many of which are recognized by industry, regulators and the national press as significant environmental challenges in the United States. Ammonium percholorate has been the recent subject of national news including several reports in the Wall Street Journal and New York Times.

"With the addition of Envirogen, Shaw will have a distinct technological and competitive edge to address the complex remediation of ammonium percholorate, MTBE, and other contaminates," said Tim Barfield, President of Shaw Environmental & Infrastructure. "This acquisition will allow Shaw E & I to take a leadership role in these key markets, by coupling our existing environmental capabilities with a more cost effective approach than the traditional approaches available in today's market."

The Shaw Group Inc. offers a broad range of services to clients in the environmental and infrastructure, power and process industries worldwide. The Company is a leading provider of consulting, engineering, construction, remediation and facilities management services to the environmental, infrastructure and homeland security markets. The Company is also a vertically-integrated provider of comprehensive engineering, consulting, procurement, pipe fabrication, construction and maintenance services to the power and process industries. The Company is headquartered in Baton Rouge, Louisiana with offices and operations in North America, South America, Europe, the Middle East and the Asia-Pacific region and employs approximately 17,000 people. For more information please visit our website at www.shawgrp.com.

For more information, please contact Bob Belk, Executive Vice President and Chief Financial Officer at 225/932-2500.

The Private Securities Litigation Reform Act of 1995 provides a "safe harbor" for certain forward-looking statements. The statements contained herein that are not historical facts (including without limitation statements to the effect that the Company or its management "believes," "expects," "anticipates," "plans," or other similar expressions) and statements related to revenues, earnings, backlog, or other financial information or results are forward-looking statements based on the Company's current expectations and beliefs concerning future developments and their potential effects on the Company. There can be no assurance that future developments affecting the Company will be those anticipated by the Company. These forward-looking statements involve significant risks and uncertainties (some of which are beyond our control) and assumptions and are subject to change based upon various factors. Should one or more of such risks or uncertainties materialize, or should any of our assumptions prove incorrect, actual results may vary in material respects from those projected in the forward-looking statements. The Company undertakes no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise. A description of some of the risks and uncertainties that could cause actual results to differ materially from such forward-looking statements can be found in the Company's reports and registration statements filed with the Securities and Exchange Commission, including its Form 10-K and Form 10-Q, reports and on the Company's web-site under the heading "Forward Looking Statement". These documents are also available from the Securities and Exchange Commission or from the Investor Relations department of Shaw. For more information on the company and announcements it makes from time to time on a regional basis visit our web site at www.shawgrp.com.

CONTACT:          The Shaw Group Inc., Baton Rouge
                  Bob Belk, 225/932-2500
                  www.shawgrp.com
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