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ON THIS DAY IN SAFETY — October 26, 2017 · Kosambi, Tangerang Regency, Indonesia
At about 8:30 in the morning, a warehouse attached to a fireworks plant in Kosambi went up. The blast rattled windows four kilometers out. It threw roof panels off the building. At a junior high school down the road, students poured into the street crying, and their teachers walked them away from the smoke.
Inside the compound were 103 workers.
The fire started at the front of the building. That detail is the whole story. The front was where the gate was, and the gate was where the people weren’t — because the front was already burning. So they went the other way. They ran deep, toward the back wall, away from the heat and away from the only practical way out. Neighbors who got close enough heard screaming, and they heard banging on doors. A handful of workers made it out by going through the flames and climbing the front gate, and most of them came out burned. One woman was on fire when she got clear.
About three hours after the first explosion, there was a second one.
When police finally worked the site, they found most of the bodies concentrated in one area at the back of the factory. Forty-nine people died, including two who died later of their injuries. Forty-six were hurt. The first victim police identified was named Surnah, aged fourteen.
It remains one of the worst industrial accidents in Indonesia’s history, and the plant had been operating for less than two months.
THE SAFETY-LEADER READ: WHAT ACTUALLY FAILED
Two days later, the Indonesian National Police said what started it. Two welders, Subarna Ega and Husnul, had been told by their boss, Andri Hartanto, to weld in an area where finished fireworks were laid out on the ground. A spark reached roughly 4,000 kilograms of gunpowder. Husnul got out before it went. Subarna Ega was named a suspect and police believed he had died in the blast.
It is very easy to stop the analysis there: a spark, some powder, a bad call, done. That reading is comfortable because it ends with two or three people and asks nothing of the rest of us. It is also so incomplete that it teaches nothing.
Look at what the paperwork said. The government had licensed this facility in 2016 — as a toy factory. Manufacturing fireworks there was not permitted at all. The license covered ten employees. There were 103 people inside. Several of the dead were teenagers between fourteen and sixteen, and Indonesia’s national human rights commission later reported that the workers were underpaid.
So the hot work order wasn’t the failure. The hot work order was what a system like that produces on an ordinary Thursday.
A plant running at ten times its authorized headcount, under a license for the wrong product, two months into operation, has no functioning barrier between a welding torch and four tons of explosive. No permit desk to say no. No competent person to clear the combustibles. Nobody whose actual job is to notice that finished pyrotechnics are lying on the floor where someone is about to strike an arc. The supervisor who gave that order wasn’t working around the controls. There were no controls to work around.
And then the egress. Workers ran away from the exit — not because they panicked badly, but because they made the only rational choice available to them in the three seconds they had. Fire was between them and the gate. People move away from heat. If your building has one practical way out and the fire takes it, your evacuation plan is not a plan. It is a coin flip that you have already lost.
The HOP read is this: the welders behaved predictably, the crowd behaved predictably, and the outcome was built into the place before anyone clocked in. Error was not the cause. Error was the trigger on a loaded system.
THE STANDARDS A U.S. SAFETY LEADER WOULD REACH FOR
Nothing here is new law. As the U.S. standards read today (October 2026):
29 CFR 1910.36 — exit routes. More than one exit route is required where the number of employees, the size of the building, or its arrangement means a single route won’t get everyone out safely. Kosambi is the textbook case for why that rule exists.
29 CFR 1910.37(a)(3) — exit routes must be kept free and unobstructed. This fire adds the companion point: a route that a credible fire blocks is not a route.
29 CFR 1910.38 — emergency action plans. Written procedures for emergency evacuation, including route assignments, and a means of alerting employees.
29 CFR 1910.165 — employee alarm systems. The alarm has to be able to be perceived above ambient noise and light levels by every employee in the affected area.
29 CFR 1910.252(a)(2) — welding and cutting fire prevention. Combustibles relocated at least 35 feet from the work, or protected where relocation isn’t possible, and a fire watch where more than a minor fire might develop. Four thousand kilos of powder on the deck is not a 35-foot problem. It is a stop-work problem.
29 CFR 1910.109 — explosives and blasting agents, which governs how this material is handled and stored in the first place.
29 CFR 570.51 — Hazardous Occupations Order No. 1 under the Fair Labor Standards Act, which bars minors from work in or about plants manufacturing or storing explosives. Surnah was fourteen.
THE FULL EHS PICTURE
Environmental: a pyrotechnics fire is not a clean burn. Fireworks compositions carry oxidizers — perchlorates and nitrates — plus metal salts for color: barium, strontium, copper, sometimes antimony. Burn four tons of that uncontrolled and you get metal-bearing particulate over a residential neighborhood and a school, then firewater runoff carrying soluble perchlorate and metals into whatever drains the site. Nobody sampled a thing that morning. If you hold an energetic-materials or oxidizer inventory, firewater containment is an environmental control, not paperwork.
Health: the survivors were burn patients, and burn injury is the long tail of an event like this — months of care, permanent disability, lives rerouted. Then there is what the responders and neighbors breathed. And then there is the piece that doesn’t show on an injury log: this was a workforce of women and teenagers, underpaid, in a plant that wasn’t legally allowed to employ most of them. Occupational health is not separable from who is allowed to say “I’m not doing that.”
Safety: single-exit occupancy, no credible alarm, hot work with no permit, incompatible materials stored with the process, a headcount the structure was never evaluated for. Any one of those is a finding. Together they are a fatality waiting for a date on the calendar, and October 26 was the date.
TRENDING NOW
1) CSB: a company has spent nearly three years not answering the phone.
On October 19, 2026, the U.S. Chemical Safety Board announced that Yenkin-Majestic/OPC Polymers has failed to implement — or even substantively respond to — any of the five safety recommendations the CSB issued after the April 2021 explosion and fire at the company’s resin plant in Columbus, Ohio. One employee died of burns and smoke inhalation. Eight more went to hospitals with third-degree burns and fractures; one needed a leg amputation after being crushed under collapsed debris.
The CSB found the cause was a reactor manway cover installed on an operating kettle that was not properly designed, constructed, or tested, plus a failure to follow basic pressure-vessel integrity quality assurance. Pressurized naphtha vapor and resin escaped through the manway seal, found an ignition source, and went. The agency also found the emergency plan and training deficient: no adequate audible and visual alarms, and no requirement to wear flame-resistant uniforms.
The CSB sent the recommendations on December 4, 2023, and again on February 5, 2026. On September 1, 2026 the company pleaded guilty to a federal criminal charge related to the incident; on September 10 the CSB’s Stephen Klejst wrote again. No response.
SO WHAT FOR SAFETY LEADERS: CSB recommendations aren’t enforceable, and that is exactly the point. The gap between “we are not legally required to answer” and “we are the kind of company that answers” is the only part of your safety culture that money can’t buy. If a letter about a dead employee can sit unanswered in your building for three years, you do not have a management system — you have a legal department. Go find out who in your org would receive that letter, and whether anyone would tell you it arrived.
2) Cal/OSHA: $212,500 over a tunnel collapse, and the designer got cited too.
On October 15, 2026, Cal/OSHA announced citations totaling $212,500 against two employers following a tunnel collapse near Knights Ferry, California. On April 14, 2026, a collapse 200 feet inside the Canyon Tunnel project trapped two workers. Twyla Capurro, a 35-year-old geologist, was killed. The other worker was seriously injured.
The citations were issued September 30, 2026 by Cal/OSHA’s Mining and Tunneling Unit. Drill Tech Drilling & Shoring, Inc. was cited $95,000 — one serious accident-related ground control violation and one willful-serious accident-related tunnel support violation. Provost & Pritchard Engineering Group, Inc., which designed the 12,000-plus-foot irrigation diversion tunnel, was cited $117,500 for a serious training violation plus those same two violations. Cal/OSHA found both employers let work proceed without removing or adequately supporting ground already identified as dangerous. Provost & Pritchard has appealed; a separate Bureau of Investigations case is open.
SO WHAT FOR SAFETY LEADERS: two things. First, “identified as dangerous” is the phrase to sit with — somebody knew. The hazard wasn’t hidden; the stop was. Second, the design engineer was cited alongside the contractor, including for training. If your firm specs the ground support, owns the competent-person inspection scheme, or signs the means-and-methods, your exposure does not end at the property line. Go read who in your contract documents is responsible for declaring ground unsafe, and whether that person has the authority to halt the heading.
FAIL OF THE DAY
A maintenance tech is cutting out a section of rusted handrail on a mezzanine. He’s done it a dozen times. He pulls the permit, gets the fire watch, sweeps the area, checks 35 feet in every direction on his level. All clean. He strikes the arc.
Thirty seconds later the fire watch is yelling. Slag has dropped through the open grating of the mezzanine floor into a cardboard gaylord of oily rags on the level below. The rags are smoldering. The extinguisher handles it. Nobody is hurt, and nobody files anything until the next shift’s supervisor smells it.
THE HOP READ: he did the procedure correctly and still nearly started a fire. He checked 35 feet horizontally, which is what the rule says and what the training taught, and he was standing on a floor with holes in it. Gravity doesn’t appear on the permit form. The gaylord was below him because that’s where the rag bin always goes, staged by someone who had never been told that the grating above is a hot work zone twice a year.
Two people did their jobs. The hole in the floor did the rest. If your hot work permit has one radius field on it, it is a two-dimensional control on a three-dimensional building. Ask for the vertical.
Got a fail or a near-miss? Hit reply, or visit https://scantoconfess.com — we’ll feature it anonymously — no names, no company, no blame. Just the lesson, so the next crew doesn’t learn it the hard way.
DO THIS ONE THING
Today, walk your evacuation route backwards — and start from the worst spot in the building, not the door.
Pick the place a fire is most likely to start: the hot work area, the oxidizer or flammables storage, the dust collector, the charging bank, the paint booth. Stand there. Now assume it’s involved and you can’t go through it. Walk out from where your people actually are, and count how many of them end up with only one way to go.
The workers at Kosambi didn’t fail to find the exit. The exit was on fire, and there wasn’t a second one. That is a design question you can answer on a Monday afternoon with a clipboard, long before it becomes a question your crew answers in three seconds.
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Please stay Safe & Hydrated!!!