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Soil washing (slowly) comes on steam

Slowly but surely soil washing of PFAS-containing soil is getting underway in the Netherlands. Upon enquiry from several soil washing companies, it appears that more than 50,000 tons of PFAS-containing soil has been successfully treated to date at a limited number of facilities.
Boskalis Environmental is one of the companies that
is currently busy cleaning PFAS-containing soil. This cleaning is intended as a pilot. The aim is to allow a long-term intake and processing. Other facilities are preparing pilot tests for cleaning PFAS contaminated soil as well. Most projects with PFAS contaminated soil are found from almost all over the Netherlands. This soil is contaminated with PFAS levels above the Class Industry standard (3, 7, 3, 3 ug/kg) and often also with other contaminants such as heavy metals, mineral oil or PAHs. The released soil is contaminated with PFAS by industrial activities, firefighting activities (use of firefighting foam) or by other diffuse sources.
In the Netherlands, a total of approximately 1.5 million tons of contaminated soil are cleaned by means of soil washing each year.
Given the total amount of treated PFAS soil of 50,000 tons, the share of PFAS soil is still small. We await with great interest the impact on the market when the final Framework of Action is announced.

Contact: Boskalis Environmental, Joop Jansen (joop.jansen@boskalis.com) or Wim Plaisier (wim.plaisier@arcadis.com)
 
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Boskalis Environmental starts soil washing test on PFAS-contaminated soil

PCTS partner Boskalis Environmental has recently started a test phase soil washing at their facility in the Netherlands. At the existing location in Amersfoort, Boskalis Environmental is allowed to process PFAS-contaminated soil, as approved by the Dutch regulatory body.

In processing 10,000 tons of soil containing PFAS, Boskalis based on rates dependent on the physical and chemical properties of the soil but were definitely competitive to other means of processing (for instance, thermal treatment).

The maximum allowable concentrations for processing are 15 µg/kg PFOS; 35 µg/kg PFOA; 15 µg/kg GenX; and 15 µg/kg for the other PFAS. These values are a factor 5 higher than the soil quality threshold values for reuse (industrial use), which was ‘3-7-3-3’ for the respective constituents.

During the trial, the efficacy of the soil washing process will be assessed. The separated and cleaned sand fraction will also be tested prior to its reuse as ‘class industry soil’.

During the soil washing process, the PFAS constituents are mainly concentrated in the sludge fraction. This fraction is firstly dewatered. Then, it will be transported to and deposited in a secured landfill. If discharge of water does not occur, the processed water is reused completely.

It is expected that, after completion of the test phase, the regulatory body will grant Boskalis Environmental the permit to process this type of soil as well.  

Contact Person: Boskalis Environmental, Joop Jansen (joop.jansen@boskalis.com); Telephone: 0651090364

Kenbri Fire Fighting joins PFAS Cleaning and Treatment Solutions

As of the 15th of November 2020, Kenbri Fire Fighting officially joined PFAS Cleaning and Treatment Solutions. Kenbri, an important service provider in fire prevention and firefighting, offers a wide range of services that encompass inspection, consultancy, rental, certification, maintenance as well as the engineering and construction of fire trucks. Kenbri is the official dealer for Rosenbauer firetrucks and firefighting foams from Fomtec and Angus.

Kenbri is a leader in the field of foam transitioning, particularly the transition of fluorine-containing firefighting foams (like AFFF and FP) to fluorine free foams (F3). This changeover is not easy as it requires intensive preparation (MoC, system change, testing and certification) and guidance during the actual process of the transition.