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    Remediation and monitoring for a tar-polluted industrial site, Belgium  

    Two centuries of industrial use left a brownfield site in Belgium heavily contaminated with tar. The site developer wanted to turn the area into a small, modern business site for local companies. However, as soil is contaminated at both surface and deeper levels, remediation and long-term monitoring are necessary.

    The site is polluted with low- and high-viscosity tar, and the main contaminant is a relatively light tar with low levels of volatile aromatics and phenols. As tar is denser than water, it sinks through the water-saturated soil where small droplets become trapped in the soil pore spaces and become dense non-aqueous phase liquid (DNAPL). DNAPL tar products are difficult to detect and treat. On the Belgian site, DNAPLs reached 18 m depth and contaminated groundwater over a 40,000-m2 area.

    RSK conducted an extensive risk assessment and considered best-available techniques to create a remediation action plan. The plan aimed to minimise the source contaminants as much as possible and remove the DNAPL. The plan proposed several remediation techniques including excavating source contaminants, removing DNAPL by pump-and-treat methods, and geohydrological control.

    Site redevelopment is ongoing, with a major remediation goal of removing the dispersion risks caused by DNAPL and preventing a widespread groundwater plume. Even though the planned DNAPL removal is expected to take 10 years, RSK is committed to removing the health and safety risks posed by this tar pollution.

    • Location: Belgium
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    📸 #selfiesonsite 🤳

    Ryan Dunderdale, Senior Surveyor at Central Alliance, providing technical support and on-site training to datum plate install teams down in Bristol.

    Want to join our team? View our latest opportunities 👉 www.rskgroup.com/careers

    #RSKgroup #behindthescenes #meettheteam #RSKfamily #RSKonsite #engineering #construction
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    🌟 In the June edition of our #employeespotlight, we spoke with with Rosie Pearce at Stephenson Halliday and Carmen Snowdon at WRc Group to find out about their recent achievements 🏆

    👏 Congratulations to you both!

    Click the link in our bio to find out more!

    #rskfamily #employeeapprecitation #team #landscapeinstitute #instituteofwater #architecture
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    Click the link in bio to learn more!

    #RSKGroup #RSKfamily #diversity #inclusion #mentalhealth
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    #RSKSteps came to an end on Tuesday 31 May after a month of stepping adventures.

    𝗜𝗻 𝗻𝘂𝗺𝗯𝗲𝗿𝘀:
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    ✔️332,268,416 steps
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    Read more about this fantastic challenge in our bio!

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    #RSKEvents

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    💡 We will showcase real-life examples to demonstrate how RSK is responding and developing capabilities to assess these emerging #contaminants.

    Find out more and register now in our bio!

    #RSKGroup #RSKfamily #PFAScontaminants #foreverchemicals #chemicals
    ...

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