Soil Washing

Effective on a range of contaminants for granular or coarse grained material, soil washing works on the principle that contamination forms a surface coating on particles. Soils of different particle sizes are separated before treatment using a variety of processes such as high pressure washing, attrition scrubbing and fines flocculation. Granular material, once treated, can be processed and eventually re-used on site. As a result, only relatively small amounts of fine grained material, in which contaminants are more heavily concentrated, require removal off-site.