ARCADIS AQUMEN Extends Facility Management Contract With DSM

AMSTERDAM, 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 EUR 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."

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

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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 at arcadis.com.