Bunds & Cell Burials
A bund is an area of Invasive Alien Plant Species (IAPS) contaminated soil. Bunds are used where cell burial is not possible and is usually only suitable for large sites, as small infestations with limited above ground growth, can be very big.
The bund method is used when it is not possible to treat Japanese knotweed in the area where it was originally located by moving it to an area within the same site that is not in use now or in the future.
Bunds should ideally be located at least 10m away from site boundaries to prevent spread. The bund can be raised, on top of the ground or placed within an excavation.
The material within the bund will be regularly treated to prevent growth and spread.
Bunds should use a root barrier membrane if being constructed in an area free of IAPS.
Small Treatment Bund
Cell burial or ‘Deep burial’ is a method of controlling an area of Invasive Alien Plant Species (IAPS) contaminated soil. Cell burials are used where space allows and off-site disposal is undesirable.
Cell burial involves preparing an area with root barrier membrane and burying the material on-site to a depth of at least 5m. Once buried, the IAPS material shall then be covered with a root barrier membrane layer before being in-filled to 5m deep with inert fill or topsoil.