Washington Paper Mill Tank Failure: 11 Dead and a River Contaminated

Added: 2026-05-29

[00:00:00]A chemical tank at a paper mill in Long View, Washington, catastrophically failed Tuesday morning. Around 500,000 gallons of one of the most costic liquids used in industrial manufacturing was suddenly and violently released.

[00:00:12]Workers are dead. Others may never be recovered. This is Stashed. I'm Pat, mechanical engineer and firefighter.

[00:00:20]On May 26th, 2026, at around 7:15 in the morning, emergency crews responded to the Nippon Dino Wave packaging company in Log, Washington. It's a craft pulp and paper mill that's been part of the community since 1953 and they employ right around a thousand people. A 900,000galon storage tank containing a chemical called white liquor failed catastrophically. The Long View Fire Department described it as a mass casualty scene. Two workers are confirmed dead. Nine more may never be recovered. Eight additional employees were injured along with one responding firefighter. Washington Governor Bob Ferguson called this the deadliest industrial tragedy in modern state history. The tank failed right in the middle of a shift change, probably the worst possible time for something like this to happen. Now, white liquor, the name sounds almost harmless, like something you'd find behind a bar, but it's not. White liquor is a strong alkaline industrial chemical, primarily sodium hydroxide and sodium sulfide.

[00:01:17]It's used in the craft pulping process to literally cook the wood chips into pulp. It dissolves the bonds between fibers and it's really good at it. To understand why this chemical is so dangerous, you need to understand pH.

[00:01:30]The pH scale runs from 0 to 14. Zero is the most acidic. Think battery acid.

[00:01:35]Seven is neutral, pure water, and 14 is the most alkaline anything gets. White liquor maxes out that scale at 14. Some say it's a little bit above. And to understand how costic that really is, you have to realize that this scale is logarithmic. That means every single step is not a little worse, it's 10 times worse. PH14 isn't slightly more costic than a pH13. It's 10 times more costic. Compare that to water neutral at pH of 7. White liquor is 10 million times more alkaline. To put that in practical terms, if I had one gallon of white liquor and I wanted to dilute it, get it to a pH of 7, I would need 10 million gallons of water. Even after 10 million gallons of water, it's still not truly safe. You need acid to chemically neutralize it. This stuff is brutal. It will cause severe burns on contact with the skin. It will destroy our eyes. At sufficient concentration, it will dissolve organic material. And about 500,000 gallons of this just went where it wasn't supposed to go. I just hit 75,000 subscribers. My goal is 100K this year. Now, this tank was right around 1100 ft from the Columbia River, one of the most important waterways in the Pacific Northwest. and it made it there.

[00:02:47]The company's own monitoring systems confirmed two separate spikes of high pH discharge heading towards the river. One at the moment of failure and one about three hours later. Now, let's talk about what actually happened to this tank because the media couldn't even agree on the word to use for it. Explosion, implosion, rupture. They used all three.

[00:03:05]Here's what we know. This was a catastrophic structural failure. Not a fire, not an explosion. At least not in the traditional sense. Based on what has been reported and what I know about tanks like this, there are a few plausible mechanisms. This tank should have an interior liner to protect the steel against the highly corrosive material it's holding. White liquor, again, pH of 14, it's really aggressive on metal over time. If that liner developed a small leak, and all liners do at some point, the costic material gets behind it and starts attacking the tank. The other possibility, and that word implosion points here, involves a vacuum. If pumps were drawing product out of the tank and the makeup air vents failed or if they're blocked, the tank could develop negative internal pressure. At a certain point, the external atmospheric pressure, it wins.

[00:03:50]That tank collapses inward and it does it violently. Either way, this was a catastrophic failure. Look at the images from the scene. Cars thrown around the parking lot, buildings damaged. That tank was in the middle of a parking lot with no secondary containment around it.

[00:04:06]Now, to be fair, secondary containment is designed to catch a leak, typically a slow release. They aren't really designed to stop a title wave, and that's what happened here. Even if containment had been there, it's likely it would not have changed the outcome of this incident. Now, for the response, the first step will be to remove the roughly 25,000 gallons of material still sitting in that damaged tank. From there, the material that was released can't just be washed away. Diluting this won't get you anywhere. They'll need to neutralize it through chemistry. adding acid to react with and cancel out that alkalinity. The process is already underway and crews are monitoring pH levels at pumping stations and areas around this incident and they're really concerned about more of this product flowing into the Columbia River. The investigation will determine the cause, but the questions around inspection history, liner integrity, and pressure relief systems are going to be front and center. Now, I really don't want to sound gruesome, but I want to be real with you because I think it's important to paint an honest picture of what's going on here. This transitioned from a rescue to a recovery fairly quickly and unfortunately I really don't know if there will be anything to recover. My heart goes out to the workers, their families, and the entire Long View community. The fire chief said it best himself. The responders who showed up that morning have friends and family who work in that building. This one hits close to home for everyone involved.