Statoil Refinery Leak Ends, Unit down Posted by Joseph Keefe October 24, 2017 A naphtha leakage at Statoil (STO)'s Mongstad refinery in western Norway has now ended, but the plant's petrol-making unit remains shut and the company is investigating the causes of the accident, a company spokeswoman said on Tuesday. There were no reports of injuries, she added. Reporting by Ole Petter Skonnord Email