The Vaughan conditioning pump is a submersible chopper pump mounted on a portable stand and fitted with a high-velocity mixing nozzle. The conditioning pump recirculates the contents of the wet well, chopping and mixing to produce a homogeneous mixture that is easily pumped out. Floating mats are removed and solids that have accumulated on the floor are re-suspended. In one project, the pump paid for itself in 2.5 months. Its applications include lift station conditioning, influent station and channel conditioning, basin conditioning, holding tank conditioning, and digester cleanout and homogenization.