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    Protecting properties in Denton

    In the late 1970s, a former brickworks in Denton, near Manchester, UK, was transformed into residential housing. By the late 1980s, residents had begun recording issues with landfill gas and toxic leachate. The site’s history of heavy chemical use – a mixture of industrial, commercial and household waste, and sludge – had severely contaminated the area and the undefined landfill boundary compounded the issues. Tameside Metropolitan Borough Council installed a gas extraction system, but it proved ineffective. The RSK group was tasked with examining the physical extent of contamination and designing a remediation strategy. Because of the sensitive nature of the site, our specialists exclusively used resistivity imaging for surveying the site.

    Once on the ground, we began accumulating ground-penetrating radar and electromagnetic conductivity measurements in as many residents’ gardens as possible to supplement the resistivity data. We calibrated all the geophysical data using the data from previous intrusive investigations to constrain and validate our interpretations. The electromagnetic conductivity measurements showed a wide distribution of conductive materials, particularly a zone of active leaching in the southern end of the site, underneath several houses. The results of the resistivity survey indicated three layers within the landfill: the thin top layer was covering material, the second layer was a low-resistivity material likely to have high leaching activity, and the bottom layer was moderately resistive and likely represented the glacial clay underlying the site. We estimated the depth of waste at about 7–10 m.

    In combination with borehole data, the geophysical data has improved the conceptual site model of the landfill. Its geometry and the areas of leachate are better defined, which is vital in determining the proximity of the landfill to properties and for future remediation. Tameside Metropolitan Borough Council was delighted with our strategy and geophysical data, “the [geophysics data] is really useful as it fills in the gaps, indicates where the landfill starts and helps us determine the risk to properties from gases and vapours”.

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    😮 80% of all brownfield development sites in the UK are impacted with asbestos in the soil or made ground at some level.

    📌Join us on this webinar that will outline some of the major issues involved in the control of asbestos in made ground in site development, the potential impacts on options appraisal and techniques that can be used to minimise issues arising from these.

    𝗦𝗽𝗲𝗮𝗸𝗲𝗿: Toby Gibbons, Operations Director of RSK Asbestos
    𝗠𝗼𝗱𝗲𝗿𝗮𝘁𝗼𝗿: Melissa Fox, Managing Director of RSK Asbestos

    Register now in our bio!

    #RSKevents #asbestos #sitedevelopment #development #construction #engineering #brownfielddevelopment
    ...

    🍃 To respond to the ongoing climate crisis, we need more renewable energy.

    🌎 Recent global events have further highlighted the urgency of a smoother transition to net zero.

    ✔️ In this edition of our series Climate Realities, RSK Renewable Energy Director Mike Kelly explores the opportunity for offshore wind to contribute significantly to the UK’s response to the climate crisis and national energy demand.

    Read more in our bio!

    #RSKGroup #climatechange #climatecrisis #sustainability #environment #environmental #renewables #renewableenergy
    ...

    📸 #selfiesonsite 🤳

    RSK Staff had an amazing time attending the Tameside Careers and Apprenticeship Exhibition!

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

    #RSKgroup #behindthescenes #meettheteam #RSKfamily #RSKonsite #education #careers #careerfair #apprenticeship
    ...

    🌳 How can businesses improve their relationship with nature?

    📌 Join Dr Rossa Donovan, Technical Director at Nature Positive, on a webinar that will explore how well the business community understands its dependencies and impacts on nature and how that translates into corporate strategies.

    Find out more and register now in our bio!

    #RSKEvents #RSKGroup #RSKfamily #nature #business #sustainability #environment #environmental
    ...

    📸 #selfiesonsite 🤳

    RSK Tanzania has been out completing a reconnaissance field study for a proposed solar farm at Kilambo village in Iringa.

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

    #RSKgroup #behindthescenes #meettheteam #RSKfamily #RSKonsite #construction #careers
    ...

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