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Authorities in Longview, Washington, say the death toll from a catastrophic chemical tank collapse at the Nippon Dynawave Packaging Company pulp and paper mill has risen to 11. Officials reported early Friday that six additional bodies were recovered from the wreckage, and three workers who remain missing are now presumed dead. The 900,000-gallon storage tank, containing “white liquor” — a highly caustic alkaline mixture of sodium hydroxide and sodium sulfide used in pulping — suffered a sudden structural implosion early Tuesday during a shift change, releasing over 500,000 gallons. Investigators and emergency crews continue recovery and safety operations at the site.

Prepared by Olivia Bennett and reviewed by editorial team.