Kensal Green

Customer:National Grid

Value: £6.6 million

The remediation of a former gas works site for redevelopment for commercial, industrial, housing and leisure uses.

The site had complex logistical issues and significant constraints: it was bounded by the Grand Union Canal, Ladbroke Grove Rail Facility, live Transco apparatus, a food retail store and a canal basin. Access to the site required careful liaison with adjoining stakeholders to ensure continuity of working with minimal disruption to the public.

The works included:

  • Removal of 130,000 tonnes of contaminated material.
  • The import of 40,000 m3 of fill material.
  • Bioremediation of 8,000m3 of material
  • The removal of tar tanks buried structures.
  • The processing of 20,000 m3 of hard material for re-use on site.
  • Treatment of contaminated groundwater using carbon filters, settlement tanks, and oil/water separators, treating a total of 18,000m3.
  • Screening of 30,000 m3 of soils to minimise waste disposal and maximise re-use on site.
  • Installation of clay walls and associated temporary works.

As part of the project the access to the Grand Union Canal had to be sealed to allow the removal of the existing canal basin and its reconstruction in a new location within the development. A double-skin sheet piled wall was installed at the entrance using the Gikon method to minimise noise disruption and potential damage by vibration to the surrounding area and facilities.

Once the entrance had been sealed the new pile walls to the basin were installed. A pre-boring operation had to be carried out to ensure any obstructions were removed prior to installation. The value of the piling works was approximately £200,000.

VHE worked closely with adjoining stakeholders to ensure continuity of working with minimal disruption to the public, and will always try to minimise any disruption our remediation services cause. For more information on our remediation works, such as bioremediation and land remediation projects, please contact us on:01226 320150

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