RemedX and parent company RSK had a successful Brownfield Awards 2020 when they took home both the Best Re-use of Materials and the Best Infrastructure Project award for their work on the £1.86-billion Mersey Gateway project. The winners were announced on 19 November at a virtual awards ceremony.

The Mersey Gateway scheme, for which RSK provided extensive environmental support and RemedX undertook specialist remediation work, is a remarkable example of civil engineering resulting in a 2.3-km, six-lane toll bridge spanning the River Mersey and associated new and upgraded linking infrastructure. The bridge opened in October 2017, but the project included extensive earthworks and remediation that were not completed until October 2019.

The legacy of heavy industry, particularly chemical manufacture and processing, in the areas adjacent to the river meant that a wide range of ground contamination was present. The project utilised detailed risk assessments and range of techniques to achieve successful remediation and enable the reuse of more a million tonnes of soil, thereby avoiding off-site disposal. RemedX and RSK worked closely with its project partners to develop and apply a highly innovative solution to remediate and allow reuse of large quantities of arsenic-contaminated soil within the scheme.

As RSK’s specialist remediation contractor, RemedX worked in partnership with the main contractor to ensure that the soil remediation remained compliant with all the soil, groundwater and surface water treatment completed under its mobile treatment permit. The additional services RSK provided to the client included contaminated land consultancy (including staff on long-term secondment), site investigation, remediation supervision, archaeology, regulatory liaison and wider environmental services. RSK in-house laboratory Envirolab provided chemical testing throughout the project.

You can find out more about the project and RemedX’s work in a recent Environment Analyst interview featuring RSK’s Haydn Keen, Project Director, and Stephen Pettitt, RSK Technical Director and Contamination Specialist for the Merseylink Civil Contractors Joint Venture.

Now in its 16th year, the Brownfield Awards (formerly the Brownfield Briefing Awards) are dedicated to recognising best practice in the brownfield, regeneration and contaminated land industry. Parent company RSK also secured joint top spot in the Best Public Engagement and Participation category for its involvement in the high-profile Buchanan and St Ambrose High School Campus Independent Review. In total, RSK companies were shortlisted in five categories this year.