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    Protecting communities from contamination

    Lubrication oil and diesel spillages from trains over a prolonged period led to light non-aqueous phase liquid (LNAPL) contamination in groundwater at a train depot in Hampshire, UK. The contamination had begun to migrate off-site and contaminate site protection wells belonging to neighbouring properties. The 6-ha depot is alongside the railway lines.

    RemedX, an RSK company, designed a remediation strategy that would not disrupt ongoing depot operations or require track possessions of the main line. The apparent LNAPL thickness in a well can indicate hydrogeological conditions that inform the remediation strategy.

    The strategy targeted LNAPL removal through pumping followed by in-situ surfactant flushing, in which surface active agents (surfactants) act as detergents to lower the surface tension between the contaminant and water. This technique requires a 5% surfactant solution to be injected into the wells, which had a measurable thickness of LNAPL.

    The contaminated groundwater and injected surfactant are then pumped out from the accessible wells and into tanks to be treated. RemedX reduced the LNAPL levels with three surfactant enhanced removals. Groundwater gauging and sampling determined the water table depth and tested for hydrocarbons after the first and second surfactant events. After the third surfactant injection, the LNAPL concentrations were reduced to a point at which the Environment Agency agreed to monitored natural attenuation, a method that enables contaminants to reach safe levels through natural processes such as volatilisation, degradation or dispersion without deliberate human intervention.

    Owing to the siteโ€™s proximity to the railway lines, RemedX staff needed to be personal track safety trained to minimise the risks on-site and enable the team to use a flatbed railway vehicle to move equipment between locations across the site. Equipment could then be transported close to existing boreholes.

    • Location: England
    • Project status: Complete
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    ๐Ÿ‘ท Did you know that the UK #construction industry contributes around 40% of the countryโ€™s total #carbonfootprint?

    ๐Ÿ“Œ Sarah Cook, Chartered Geologist and Associate Director of RSK company Leap Environmental Ltd, presented Leapโ€™s foundation carbon calculator in one of our latest webinars.

    ๐Ÿ—๏ธ This tool has been developed to consider embodied carbon associated with foundations and will enable developers to identify carbon costs and potential savings early in the #design process.

    Find out all about our past and future events in our story!

    #RSKEvents #RSKGroup #RSKfamily #sustainability #constructionindustry #building #carbonemissions #carboncalculator #co2
    ...

    ๐Ÿ‘ Barcelona-based RSK company Amphos 21 is set to take part in one of the most extensive groundwater chemistry modelling projects that has ever been conducted.

    ๐Ÿ–ฅ๏ธ What does this exciting project entail? What is the ultimate goal? Find out all the details in our story!

    #RSKGroup #RSKfamily #groundwater #supercomputer #sustainability #sustainable #enviromental #waterindustry
    ...

    #selfiesonsite ๐Ÿคณ

    Scott and Piotr ready to get started on steel fencing works for East West Railway Company!

    ๐Ÿ“ธ @lewisjimmy83

    Want to join our team? View our latest opportunities ๐Ÿ‘‰ www.rskgroup.com/careers

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

    ๐Ÿ’ก All-Energy 2022 starts Tomorrow!

    ๐Ÿค #RSKGroup will be exhibiting at the event, alongside two of our companies: Stephenson Halliday and Headland Archaeology (UK) Ltd

    ๐Ÿ“Œ Come visit us:
    ๐—ฅ๐—ฆ๐—ž ๐—š๐—ฟ๐—ผ๐˜‚๐—ฝ - Stand D60B
    ๐—ฆ๐˜๐—ฒ๐—ฝ๐—ต๐—ฒ๐—ป๐˜€๐—ผ๐—ป ๐—›๐—ฎ๐—น๐—น๐—ถ๐—ฑ๐—ฎ๐˜† - Stand H58
    ๐—›๐—ฒ๐—ฎ๐—ฑ๐—น๐—ฎ๐—ป๐—ฑ ๐—”๐—ฟ๐—ฐ๐—ต๐—ฎ๐—ฒ๐—ผ๐—น๐—ผ๐—ด๐˜† - Stand J61

    We would love to see you there!

    ๐Ÿ“… 11-12 May 2022
    ๐Ÿ“ SEC, Glasgow

    #RSKFamily #RSKevents #renewables #energy #renewableenergy #sustainability #enviroment #ecofriendly
    ...

    ๐Ÿก Housing Brighton, a conference organized by CIH Events, starts Tomorrow!

    ๐ŸŸข #RSKGroup is one of the proud sponsors of this event.

    ๐Ÿ’ก Housing Brighton is your opportunity to gain invaluable insight into the future of #housing in England.

    ๐Ÿ“… 10-11 May 2022
    ๐Ÿ“ Hilton Brighton Metropole

    #RSKEvents #property #house #construction #home #innovation #housingbrighton
    ...

    ๐—ฃ๐—ฒ๐—ฑ๐—ผ๐—บ๐—ฒ๐˜๐—ฒ๐—ฟ ๐—–๐—ต๐—ฎ๐—น๐—น๐—ฒ๐—ป๐—ด๐—ฒ ๐Ÿฎ๐Ÿฌ๐Ÿฎ๐Ÿฎ: ๐—ข๐—ณ๐—ณ ๐˜๐—ผ ๐—ฎ ๐—ณ๐—น๐˜†๐—ถ๐—ป๐—ด ๐˜€๐˜๐—ฎ๐—ฟ๐˜ ๐—ถ๐—ป ๐˜„๐—ฒ๐—ฒ๐—ธ ๐Ÿญ

    ๐Ÿšถ Colleagues across the family of businesses shared their thoughts and pictures, as well as some tips for week 2 of the #RSKSteps challenge, in our latest article in our story!

    ๐Ÿ˜ƒ What do you enjoy the most about #walking? Tell us in the comments below!

    #RSKGroup #RSKfamily #wellbeing #health #steps #walk #hiking #nature #landscape
    ...

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