Lumns Lane Hero
Lumns Lane Hero

Lumns Lane Chemical Landfill

A chemical manufacturer’s historic in-house disposal facility. The site accepted a wide variety of hazardous chemical sludges and residues, including VLL radioactive wastes over a long period. Some of these materials deposited were also thixotropic and therefore could not be easily handled or disturbed.

The site was un-engineered, and in consultation with the Environment Agency required the owners to address a variety of factors to mitigate the long-term impacts. Due to changes in environmental legislation over the last century, information related to the site and waste properties was sometimes limited. The protection and safety of our operatives had to be carefully managed and innovative solutions created to manage risk.

A chemical manufacturer’s historic in-house disposal facility. The site accepted a wide variety of hazardous chemical sludges and residues, including VLL radioactive wastes over a long period. Some of these materials deposited were also thixotropic and therefore could not be easily handled or disturbed.

The site was un-engineered, and in consultation with the Environment Agency required the owners to address a variety of factors to mitigate the long-term impacts. Due to changes in environmental legislation over the last century, information related to the site and waste properties was sometimes limited. The protection and safety of our operatives had to be carefully managed and innovative solutions created to manage risk.

Booth Ventures firstly had to reinforce and regrade the existing waste mass to ensure stability, create access to all areas, and to prepare it for future works. Low-lying areas within the site were then raised with imported material to create a profile that shed water. Thixotropic areas were carefully blended with imported materials to improve the strength of the waste mass. The site also contained two leachate lagoons, pipelines, and structures that were decommissioned and demolished.

A geosynthetic clay liner (GCL) was then engineered across the site in phases to cap the existing waste and reduce infiltration. An above cap restoration layer was placed to protect GCL and allow the establishment of a comprehensive surface water management system. These included the protection of certain areas with erosion-resistant materials, the formation of weirs, and rock armouring. Finally, the newly capped site was grass seeded to improve the visual impact and control run-off.

The former chemical landfill at Lumn’s Lane is now decommissioned and safely restored. The project was completed in partnership with the site owner and environmental consultants who provided external verification.

Environmental surveillance shows a substantial and increasing decline in monitoring and the site was used by a delegation by the EA and HMRC as an example of good site practice.

PROJECT HIGHLIGHTS

  • LANDFILL NOW DECOMMISSIONED
  • THE SITE INCLUDED VLL RADIOACTIVE WASTES
  • SITE USED BY THE EA AS AN EXAMPLE OF GOOD PRACTICE

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