DOP Pump 350L first with auger head then with cutter unit Years of uncontrolled production at a chemical plant had severely contaminated the Ebro River near Flix, Spain. The challenge was to remove the contaminated sediment without any turbidity and pumping it to a dewatering plant. Two DOP pumps provided the solution. The first one, a DOP350L was fitted out with an auger head and attached to a pontoon-based excavator. The auger head cut away the layers of contaminated sand and silt with high accuracy - the excavator had been fitted out with NAVGUARD positioning and survey sensors and software. See all deliveries