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Boskalis Environmental is a global leader in the large-scale treatment of mineral waste streams like soil, sediment, incinerator bottom ash (IBA) and mineral waste materials, from sewers, drains, pumping stations and street sweeping waste. We design and manage the entire integral process, from excavation, transport, treatment, quality control, re-use and disposal of the various material streams.

Company profile

Boskalis Environmental is involved in soil cleaning, the processing of dredged sediment, water and land remediations, resource reuse and depot management. We specialize in the large scale cleaning of contaminated soil and mineral waste. In doing so, we use techniques that we develop ourselves and installations that we design and build ourselves. We also take care of the entire process, including inspection, planning, transport and marketing of the partial flows.

Because we have our own technical service, engineering department and laboratory, we are able to carry out complex projects in full: from the preliminary research, the design and the project management, to the construction of the necessary installations, the implementation and the operations.

Boskalis Environmental works closely with Boskalis Netherlands and Boskalis International. Our products are used as building materials within Boskalis Netherlands (including Beaumix®). The Raw Materials Department takes care of its marketing and reuse in, amongst others, various projects of Boskalis Netherlands.


Contaminated sediment

Boskalis Environmental has worldwide experience in the execution of complex, wet remediation works, in ports and rivers. This involves a combination of dredging with the processing, reuse and/or disposal of (contaminated) sludge. We are experts in the field of separation of sand from and the dewatering of sediment. We have developed techniques and installations available for this purpose. Our goal is to recover as much reusable material as possible.


Depot management

In recent decades, Boskalis Environmental has specialised in the operational management and maintenance of large dredging depots. These depots are sometimes used for the temporary storage of dredged sediments before these sediments are processed into building material, or have a definitive character as a landfill.


Soil treatment

One of Boskalis Environmental's most important business activities is the large-scale cleaning of contaminated soil and mineral waste. In doing so, we take care of the entire process of acceptance, cleaning, various inspections, planning, transport and marketing of the sub-flows. Treatment with these plants takes place on the basis of physico-chemical separation, separating clean components from contaminated parts.


Process and wastewater treatment

Closely related to our soil treatment processes, is our knowledge in the field of process and waste water treatment.

An important step in the wet processing of soil and dredged materials is the removal of suspended solids from the process water, to enable reuse of this water. In principle, sedimentation could be used, but due to the fineness of the particles in combination with the large process water flow, accelerated sedimentation by means of flocculation is necessary.


Incinerator bottom ash washing

After a period of research and development, Boskalis Environmental has successfully designed a process for washing incinerator bottom ash (IBA) for use as a freely applicable building material. In July 2016, the joint venture Wash (Boskalis Environmental and HVC) started operations in the world's first fully- integrated bottom ash washing plant in Alkmaar.

Bodemsanering Droog Bebording 1

Soil remediation

Boskalis Environmental is (in particular) engaged in complex soil remedial projects in the Netherlands. We employ specialists who ensure that clean-ups are carried out in accordance with the applicable rules and safely. If necessary, we can use mobile treatment plants to clean contaminated soil on site.



Boskalis Environmental has its own dedicated laboratory that undertakes research activities such as sampling, geotechnical and environmental surveys and physical analysis. This is an added value for the client. The surveys carried out by our laboratory enhance the quality of our results, during both the preparation and execution of projects.


Cone Penetration Test

Boskalis Environmental' s laboratory is specialized in geotechnical analyses, soil investigations and installation of geotechnical monitoring instruments on projects worldwide. For the installation of the monitoring instruments, we use a Cone Penetration rig/unit, which are available truck or crawler based.

Soil Washing Plant

Mobile Soil Washing Plant

The Mobile Soil Washing Plant (MWSP) is designed to process mineral waste materials. The Washing Plant process is based on a number of in line process steps, each to be considered as separate plant modules. Our Soil Washing equipment focuses on beneficial use.


Polymer Dosing Unit

Boskalis Environmental has extensive experience with the use of polymers in their soil and sediment treatment plants. This knowledge is used for the development of the polymer dosing unit. The dosing unit is easy to install and has a small footprint.

Our equipment

Boskalis Environmental offers the following equipment:

Video: our history

Given the growth of Boskalis Dolman, Stuyvesant Environmental Contracting LLC and Stuyvesant Projects Realization Inc activities in Europe and North America respectively, a strategic decision was made in 2017 to bring these three organizations under one new label: Boskalis Environmental. The name states the relationship with our parent company, Boskalis, and our core business, environmentally sound and sustainable solutions. In this video, we present the most important milestones in our history.


Our employees are the most important key to the success of Boskalis Environmental. The safety of the people who work for and with us is therefore the highest priority. In order to keep our working environment incident – and accident free, Boskalis has introduced the safety program NINA. Which stands for No Injuries, No Accidents and is a clear vision on safety.

Quality and sustainability
In addition, we are affiliated with the quality system WOW and we have a strong sustainability ambition. This means that we continuously work on reducing CO2 emissions, invest in innovative and sustainable equipment and train our people in responsible use of our equipment and energy efficient use on our installations.

Read more about the CO2 goals at the website of Boskalis Nederland (Dutch only): click here 

Boskalis Environmental has the necessary process – and product certificates:

  • ISO 9001:2015: Quality
  • ISO 14001: 2015: Environment
  • OHSAS 18001:2007: International standard for health and safety 
  • VCA 2008/5.1
  • CO2 Prestatieladder

To download these cerificates, you can scroll down to the download section below.


Boskalis Environmental B.V.

Rosmolenweg 2
3356 LK Papendrecht
The Netherlands

Stuyvesant Environmental Contracting LLC

PO Box 8031
Princeton, NJ 08543-8031
United States of America

Contact Details

Contact Details EN3

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