Used cooking oil purchased for production of biodiesel was heavily contaminated with degreaser. This contamination created large amounts of gasses and caused swelling of flexitank and extensive damage of shipping container. Also when made into biodiesel, producer reported extensive damage was caused to vehicles engine injectors due to degreaser contamination. Finally, delivery volume was short and King Recycling owes us a $1, 091 refund which we have been trying to get back for 6 months now.