Bodies recovered after chemical tank implosion at Washington paper mill
cbsnews.com> The tank that failed was holding white liquor — a chemical commonly used in paper and pulp processing, which consists of sodium hydroxide and sodium sulfide. Authorities previously said the tank had an approximate capacity of 900,000 gallons, and was about two-thirds full at the time of the incident. Local authorities estimated Wednesday that roughly 25,000 gallons of material may remain inside the damaged tank, and it is leaking out slowly.