Emergency services responded en masse to the Shell Pernis refinery in Rotterdam on Monday night after a leak of hydrofluoric acid was discovered. Less than 48 hours earlier, emergency services also responded to the refinery when a short circuit in a high voltage cable caused a fire, NU.nl reports.
A very low concentration of the hazardous substance leaked when flushing pipes, according to the local safety office. The leak was discovered around 10:15 p.m. By 00:30 a.m. the Shell staff managed to close the leak. The acid did not leak off the Shell premises.