Press release

Papendrecht, 2 February 2017

Royal Boskalis Westminster N.V. (Boskalis) announces, together with Inashco, that it will process all bottom ash produced by Attero for a period of ten years. The contract was awarded to ACCN (Ash Cleaning Company Netherlands), a joint venture between Boskalis Environmental and Inashco. The total value of the contract will be in excess of EUR 100 million over the ten-year period and is partly dependent on the market prices of the recovered metals. Boskalis holds a 50% stake in ACCN with the results being accounted for as an associate.

Attero's waste-to-energy plants in Moerdijk and Wijster in the Netherlands produce around 450,000 tons of incinerator bottom ash per year. ACCN is building a state-of-the-art plant at Nauerna in the Port of Amsterdam area to process the bottom ash, based on a washing process developed by Boskalis Environmental. Once processed, almost all of the bottom ash is suitable for re-use as a raw material, allowing Boskalis to contribute to the circular economy. The mineral fraction, consisting of sand and granulate, will be used as a freely applicable building material in Boskalis' civil engineering works while the valuable and rare metals can be marketed as commodities by Inashco. In this way the combination Boskalis - Inashco provides an integrated solution and takes care of the washing and processing of the incinerator bottom ash on behalf of Attero. Furthermore, the agreement enables Attero to meet its Bottom Ash Green Deal obligation to the Dutch government.

FOR FURTHER INFORMATION

Investor relations:
Martijn L.D. Schuttevâer
ir@boskalis.com

Press:
Arno Schikker
press@boskalis.com

T +31 78 6969310

Royal Boskalis Westminster N.V. is a leading global services provider operating in the dredging, maritime infrastructure and maritime services sectors. The company provides creative and innovative all-round solutions to infrastructural challenges in the maritime, coastal and delta regions of the world with services including the construction and maintenance of ports and waterways, land reclamation, coastal defense and riverbank protection. In addition, Boskalis offers a wide variety of marine services and contracting for the oil and gas sector and offshore wind industry as well as salvage solutions (SMIT Salvage). Furthermore, Boskalis has a number of strategic partnerships in harbour towage and terminal services (KOTUG SMIT Towage, Keppel Smit Towage, Saam Smit Towage and Smit Lamnalco). With a versatile fleet of 1,000 units Boskalis operates in around 75 countries across six continents. Boskalis has over 8,200 employees, excluding its share in partnerships.

This press release can also be found on our website www.boskalis.com.

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