Japanese knotweed removal - the supervised "Dig & Dump" method
When to use "Dig & Dump"
The recommendation within the Environment Agency Code of Practice is that "Dig & Dump" should be the method of last resort. We agree as there are effective alternatives that are both cheaper and better for the environment.
One such alternative is our Xtract method, where we process the infested soil on site to remove the offending knotweed rhizome, so that the soil can be re-used on site.
However, there are some circumstances where technical considerations make alternatives impractical leaving Dig & Dump as the chosen method.
What does "Dig & Dump" involve?
Dig & Dump involves the physical excavation either by us or under our expert supervision of all soils containing viable Japanese knotweed rhizome. These are then loaded into a lorry, and transported to a licensed landfill site, for disposal.
How does Environet reduce volume and cost?
With expert supervision it is usually possible to substantially reduce the volume of soil being classified as knotweed infested, as it is possible with a trained eye to establish the depth and lateral spread of the rhizome system. The volume can sometimes be reduced by as much as 50%. We have flexible pricing formula to either share the risk on volume with you, or if you prefer a fixed lump sum quote, we may take the entire volume risk.
How does Environet ensure compliance with environmental legislation?
Particular care is required to ensure no viable rhizome is spread either on or off site during the operation. Procedures are put in place to ensure all of the Environmental Protection Act 1990 “Duty of Care” requirements are met. Environet is a registered waste carrier and ensures all waste is consigned to licensed sites authorised to accept Japanese knotweed.
Usually it is necessary to import clean fill material to backfill the excavation, but this depends upon the mass balance of the site in question.
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