Supervised Dig & Dump
The recommendation within the Environment Agency Code of Practice is that Dig & Dump should be the method of last resort. We endorse that recommendation. However, there are certain circumstances where Dig & Dump is the optimum solution, in particular where other physical removal methods are not practical due to limited space or access to the site.
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.
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%.
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.
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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Key Benefits
Fast but expensive
Volumes reduced by expert supervision
Supervision ensures legal compliance
