IAPS Soil Screening
Screening of soil containing Invasive Alien Plant Species (IAPS) material can be a very effective for many sites. Screening the soil involve removing viable rhizomes and other plant material by processing the soil through special designed machinery and screen mesh, leaving the processed soil clean of vegetation. The process soil can be re-used on site for landscaping etc.
Where ground permits, the screening of IAPS contaminated soil can reduce the volume of material for off-site disposal by over 70%, resulting in substantial savings in transport and waste disposal costs. Similarly, in the case of on-site programmes, such as cell burial or bunds, the reduced volume of material requiring burial can lead to considerable cost benefits.
With difficult or restricted sites, the use of soil screening can mean the difference between being able to implement a complete on-site solution instead of using the higher cost of off-site disposal.
Typical Soil Screening Machine
When soil screening is used as part of an on-site, bund or deep burial process, a designated area should be available on the site to allow the temporary storage of the screened soil material.
Where possible this should be an area where no future disturbance is planned, such as an area that will be used for landscaping.
All proposed work areas should be recorded and mapped and the site should be monitored and inspected in subsequent years to ensure that no risk material has succeeded in escaping the screening process.