Hazardous Materials

H2S claims two (2) lives in PRCS (1 entrant & 1 would-be rescuer)

RIP 🙏 Two young men, 20 & 21, die from hydrogen sulfide gas exposure during a well cleaning job. Three others were hospitalized. They were working at a recently sold home when a chemical reaction created deadly hydrogen sulfide gas in the confined space beneath the home’s porch. The workers were using muriatic acid to…...

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Line Break Gone Bad (Isolated the WRONG Cl2 RD and Contractor Work Permitting Failures leading to an 8K pound release)

On May 20, 2025, at approximately 8:15 a.m., approximately 8,000 pounds of toxic chlorine were released, seriously injuring one employee. The community was ordered to shelter in place, and the facility estimated that the incident resulted in approximately $23 million in property damage. On the day of the incident, the facility planned to replace a…...

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150-lb Liquid NH3 Cylinder BLEVEs during intentional heating

On October 8, 2024, at 8:15 p.m., a cylinder containing approximately 150 pounds of LIQUID anhydrous ammonia (NH3) exploded, seriously injuring four (4) employees at a plastics manufacturing facility. On the day of the incident, the facility planned to introduce anhydrous ammonia into equipment as part of a chemical treatment in preparation for turnaround maintenance…...

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Argon asphyxiates two workers leak checking a process

SAFTENG Comment:A basement is NOT by definition a “confined space”. That does not mean that a basement cannot have a hazardous atmosphere. Argon is 1.38 times heavier than air and with NO ventilation designed to remove this gas from a basement, it will displace the Oxygen leading to this horrific event. So many failures in…...

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Line Break w/ Hot Work Gone Bad (1/2 gallon of Flammable Liquid)

On March 22, 2021, at approximately 12:30 p.m., an explosion and fire occurred at a Refinery. The explosion and fire seriously injured one contract worker Leading up to the incident, the refinery was shut down for turnaround maintenance. The planned maintenance work included removing a section of carbon steel piping in the Fluidized Catalytic Cracking…...

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OSHA has issued a final decision to remove several withdrawn HAZLOC test standards from the NRTL Program’s List of Appropriate Test Standards

OSHA has issued a final decision to remove several withdrawn HAZLOC test standards from the NRTL Program’s List of Appropriate Test Standards. These final actions are detailed below in Table 1. Additionally, Table 1 lists the replacement test standard that OSHA has already incorporated into the NRTL Program’s List of Appropriate Test Standards (for informational…...

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Line Break Gone Bad (Failure to evacuate Hot Condensate)

A big part of an energy isolation/control plan for Line Break/Equipment Opening tasks is how to EVACUATE the stored energy after the isolation. In this case, it was STEAM that had cooled into hot condensate, which was NOT drained from the piping before work began to fix the steam leak. A VERY COMMON error made,…...

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Line Break Gone Bad (Steam with single valve isolation)

In many Line & Equipment Opening (LEO) safe work practices, some leeway will be granted to the workers AFTER the INITIAL “break” based on the level of ISOLATION they have protecting them. For example: A LEO has a double block and bleed arrangement on BOTH sides of the opening. During the initial “break,” the worker(s)…...

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Line Break in Pit (PRCS) fatality (H2S/CO; Would Be Rescuer dies)

On May 29, 2024, at about 3:15 p.m., several pounds of hydrogen sulfide and carbon monoxide gas were released at a Sugar Cooperative. As a result of the release, one employee was fatally injured, and another employee was seriously injured due to inhalation of the gases. The facility’s investigation found that, at the time of…...

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Line Break Gone Bad (H2S when changing pressure gage)

On May 4, 2023, at 6:25 a.m., approximately 790 pounds of a hydrocarbon mixture containing about 7,000 parts per million (ppm) of hydrogen sulfide were accidentally released at a Refinery. Exposure to the toxic hydrogen sulfide vapor seriously injured one employee. The facility’s investigation found that, on the day of the incident, pressure in a…...

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Hot Work on Vessel Bolts leads to explosion

On Friday, February 3, 2023, at approximately 10:46 p.m., a flash fire was accidentally released from a product purge vessel (“vessel”) flange during planned maintenance activities. The fire seriously injured four (4) contract workers. On January 29, 2023, the facility shut down its polyethylene unit for planned maintenance. Following the shutdown procedure, operators purged and…...

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