The Immediately Dangerous to Life or Health (IDLH) value for chlorine has been subject to significant reevaluation since its inception in the 1970s. The history reflects a transition from an early consensus on occupational safety to more rigorous, data-driven toxicological assessments.
The history of ammonia’s Immediately Dangerous to Life or Health (IDLH) levels is a classic example of how occupational safety standards evolve as toxicological data becomes more refined. Since the concept was first introduced in the 1970s, the ammonia limit has undergone significant downward revisions based on a better understanding of acute human tolerance.
On 28 September 2019, a cargo tank containing styrene monomer on board the Cayman Islands-registered chemical tanker Stolt Groenland ruptured due to runaway polymerization. The catastrophic rupture released a large quantity of vapor into the atmosphere, which subsequently ignited. Fire-fighting efforts by the emergency services took over six hours and involved more than 700 personnel
So I asked Google Gemini… What are the LEL correction factors for the top 5 direct reading instruments? I asked this as I wanted a side-by-side comparison of the DIFFERENT correction factors for these five (5) different meters. Some of the variation is 100% greater, so the moral of the story is that when you
Low humidity makes most LEL (Lower Explosive Limit) detectors read lower than they should, because catalytic‑bead sensors depend on moisture for heat transfer and baseline stability. This can lead to under‑reporting of gas concentration, slower response, and—in extreme dryness—temporary sensor desensitization. Below is a clear, technically grounded explanation based on how LEL sensors work and
We continue to see NH3 LOPC events from piping and piping components. We could debate whether PSM/RMP has had an impact on this industrial sector. I have no idea what actually failed nor do I know the failure mode. What I do know is that NH3 makes the news weekly. Compared to Chlorine, #2 HHC/EHS
This is a response to a client regarding their question… do we need to use non-sparking tools in our flammable and combustible dust areas? This is a GREAT practice, but many people may be surprised that OSHA has to use its GDC to cite this requirement, as it is NOT an OSHA/NFPA/IFC requirement. Of course,
If you can’t tell, I am having a ball playing with these AI systems. And to be honest, my numbers were a bit more conservative than Gemini and Grok, but darn, they were excellent answers that are SOLID nonetheless. These AI tools may make amazing tools for PRE-PLANNING for Pool Fires and FOAM INVENTORY needs.
My question: How much water flow in GPM is necessary to cool a 1,000 gallon LPG tank that is involved in a pool fire to prevent it from experiencing a BLEVE? Their answer… Google Gemini is learning who I am! Given your work with SAFTENG.net, you likely know that while 55 GPM is the “engineering”
Yes, there are two (2) types of BLEVEs, and much like the myth that BLEVE’s only happen to Pressure Vessels with liquified flammable gases, COLD BELVEs account for nearly 25% of all BLEVEs. So what is the difference between the two? Super GROK explains it better than I could… A BLEVE (Boiling Liquid Expanding Vapor
Period: October 2024 – September 2025 Executive Summary During the fiscal period of October 2024 through September 2025, OSHA issued a total of 20 citations following 14 inspections related to Standard 1910.120. The total current penalty for these violations is $167,073, averaging approximately $8,354 per citation. The data indicate that the Manufacturing sector is the
The short answer is NO, but if we do, there’s a significant catch regarding its protection rating. Under OSHA standards (29 CFR 1910.134), you are technically allowed to perform a Qualitative Fit Test (QLFT) on a full-face respirator, but doing so limits its Assigned Protection Factor (APF) to 10. Here is the breakdown of why
