Dual phase or multiple phase extraction (DPE, MPE) is also referred to as Vacuum Enhanced Recovery, VER. A suction tube with an opening located just below a free product phase slurps products phases, soil vapour and some groundwater. The three different media are separated above ground and each medium is treated individually. Microbial degradation of contaminants is intensified in the unsaturated zone (Bioventing). The technology is applicable for the treatment of LNAPL (light non-aqueous phase liquids).