PRESS RELEASE ARCADIS NV Nieuwe Stationsstraat 10 P.O. Box 33 6800 LE Arnhem The Netherlands Tel +31 26 3778 292 Fax +31 26 4438 381 www.arcadis.com ARCADIS AQUMEN Extends Facility Management Contract With DSM February 23, 2010 – ARCADIS (NYSE EURONEXT: ARCAD), the international design, consulting, engineering and management services company, today announced that ARCADIS AQUMEN, a joint venture of ARCADIS and British Carrillion, has signed a contract extension for its facility management contracts with DSM. The extension covers a 4 year period (3 years plus an option for a 1 year extension). The last contract with DSM was valid until January 1, 2011 and this will now be extended by three years. ARCADIS AQUMEN provides procurement and management services related to facility management on an annual basis for DSM with a total value of approximately € 20 million. The facility management and real estate services are delivered on plant and office locations of DSM. Activities include procurement and management of building maintenance, real estate management, catering, cleaning, and staff transportation. With this extension, ARCADIS AQUMEN will also contribute to the strategic cost saving program of DSM. “This contract extension signals DSM’s satisfaction with the quality of our services and the service orientation of the ARCADIS AQUMEN staff members. Through the cost savings we will provide additional added value to DSM in these economically difficult times,” said Bernt Bouwmeester, director of ARCADIS AQUMEN. “This provides a good basis for further growth of ARCADIS AQUMEN in 2010.” For more information please contact: Joost Slooten of ARCADIS at +31-26-3778604 or outside office hours at +31-6-27061880, or e-mail at joost.slooten@arcadis.com. About ARCADIS: ARCADIS is an international company providing consultancy, design, engineering and management services in infrastructure, environment and buildings. We aim to enhance mobility, sustainability and quality of life by creating balance in the built and natural environment. ARCADIS develops, designs, implements, maintains and operates projects for companies and governments. With more than 15,000 employees and over EUR 2.0 billion in revenues, the company has an extensive international network that is supported by strong local market positions. Visit us on the internet at: www.arcadis.com Imagine the result