Aecom Technology Corp. on Tuesday said that it is one of about 40 companies to get a five-year contract to provide environmental restoration and remediation services to the U.S. Air Force.

The Los Angeles provider of professional, technical and management support services said that the five-year contract with the U.S. Air Force Center for Engineering and the Environment has a total worth to contractors of up to $3 billion.

The contract will have the company overseeing the removal of groundwater-extraction and soil-vapor extraction treatment systems at the March Air Reserve Base in Riverside County. The company also will perform the remediation of surface soils at the General Mitchell Air Reserve Station in Wisconsin.

Shares were down 43 cents, or 1.8 percent, to $23.28 in midday trading on the New York Stock Exchange.

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