In order to skim oil from an underground tank with a small, round access port, our customer required the oil removal capacity of a Model 6V skimmer, but with portability to move the system from one location to the next. Custom tube guides allow the collector tube to fit through the access port. The customer required that recovered oil to be collected in an elevated 55-gallon drum, so the skimmer is mounted on a 72-inch floor frame. In addition, the job required an explosion proof controller, which was to be mounted on the frame. All this was to be mounted on a counter balanced, specially designed cart.