Home / Disasters and Accidents / Chemical Tank Implosion: 11 Dead, Probe Finds Prior Warnings
Chemical Tank Implosion: 11 Dead, Probe Finds Prior Warnings
29 Aug
Summary
- Tank deemed at risk of failure nearly a year prior to implosion.
- Company ignored inspection findings and repair recommendations.
- Disaster resulted in 11 worker fatalities from burns and injuries.
A chemical tank at a paper plant in Washington, which imploded and caused the deaths of 11 workers on May 26, 2026, had been identified as being at risk of failure almost a year before the incident. Federal investigators reported that Nippon Dynawave Packaging, the plant's owner, received inspection reports in July 2025 detailing 'significant thinning' of the tank's walls.
Despite multiple inspections and recommendations for internal inspection and repairs, the company did not perform any. Nippon Dynawave continued to use the 1.2 million-gallon tank, which holds a mixture used in paper pulp production. The company president stated that the preliminary report lacks important context and urged patience for the full investigative process.
The implosion sent a wave of caustic liquid, heated to 200 degrees, flooding the area and causing severe chemical burns and blunt-force injuries to the 11 deceased workers. Investigations are ongoing to determine the precise cause, with a disruption elsewhere in the plant reportedly driving the tank's liquid level to 90 percent capacity at the time of failure.
Environmental regulators have also made an initial determination of 35 environmental violations against Nippon Dynawave Packaging related to the spill and its aftermath. Contaminated water entered storm and wastewater systems, some flowed into the Columbia River, and nearby ditches experienced fish deaths, prompting cleanup efforts.
