Anhydrous HF leaked from the liquid valve as two workers were on top preparing to connect a Anhydrous Hydroflouric ISO Tank for offloading. They accidentally fully opened the quarter turn valve. An estimated 8 tons of HF was released. 5 people including the 2 workers perished, 18 responders, workers, reporter wound-up in the hospital, almost 3000 villagers from 2 villages downwind of the facility were treated for irritation, exposure.