A sustainable and environmentally friendly method, Dig and Cell Burial is ideal if you have enough space on your land for the knotweed waste to be relocated.
On-site burial
Under the Environment Agency’s ‘Knotweed Code of Practice 2013’, Japanese Knotweed waste can be buried on the same site it was excavated from if you have sufficient space. The burial is either at 5 metres deep or 2 metres if encapsulated in a protective root barrier.
Instead of removing the controlled waste material to landfill, which incurs both transportation and landfill tax costs, we identify a suitable location on your existing site to bury it safely.
Encapsulation
With this method buried knotweed waste is wrapped within a permeable root barrier. This is usually 2 metres below finished ground level to protect against future human or animal disturbance.
Because of the potential for future movement as the ground settles, we recommend that burial is in areas of open space, rather than under buildings or other construction, as far as possible. However, we can bury the waste under structures if suitable engineering is in place.
To prevent future accidental damage, the cell burial will be recorded on the site’s Knotweed Management Plan.
Contamination
Before cell-burial takes place soil samples are taken and tested for other potential contaminates. If high levels of contaminates are found then onsite burial may not be possible. If this is the case the waste will need to be removed to specially licensed landfill sites.
