
Is Exactly 10% LEL Safe? OSHA Defines It Two Ways — and Enforces the Stricter One
OSHA's definition says a hazardous atmosphere is flammable gas 'in excess of 10 percent' of the LEL — so 10.0% reads as acceptable. Every other OSHA document says the opposite. This article shows what the enforcement directive actually settles, with verbatim citations.

Who Dies in Confined Spaces: 1,030 Deaths, and Why So Many Are Rescuers
The Bureau of Labor Statistics counted 1,030 confined-space worker deaths from 2011 to 2018, and NIOSH's landmark finding is that more than 60% of confined-space fatalities are would-be rescuers. This study lays out the data — the causes, the gases, the rescuer multiplier — and the OSHA Subpart AA rules written to stop each one.

Why Hot Work Keeps Killing: 15 CSB Investigations and the OSHA Rules Behind Them
The U.S. Chemical Safety Board has investigated 15 fatal hot-work incidents since 2001, and they share one pattern: a flammable atmosphere in or around a tank, and no gas monitoring before the torch. This study lays out the CSB record, the seven lessons it drew, and the exact OSHA standards that cite what the CSB investigates.

Confined Space Training by Role: Entrant, Attendant, Supervisor
A permit-required confined space entry has four trained roles, and each owes different duties. This guide covers what the authorized entrant, attendant, entry supervisor, and rescue team must know under 1926 Subpart AA.

Confined Spaces in Construction (Subpart AA) vs General Industry (1910.146): Don't Cite the Wrong Standard
Construction confined space work falls under 29 CFR 1926 Subpart AA, not 1910.146. Here is the exact difference, a section-by-section CFR map, the controlling-contractor rules, and how to avoid citing the wrong standard.

Confined Space Entry: OSHA Permit-Required Guide for Construction
Complete guide to confined space entry in construction under 29 CFR 1926 Subpart AA. Covers permit-required vs non-permit spaces, atmospheric testing order, the entry permit, rescue duties, multi-employer coordination, and the citation traps that get contractors fined.

Digital Permits for Construction: Hot Work, Confined Space, Excavation & Scaffold
Digital permit-to-work systems replace paper for hot work, confined space, excavation, and scaffold — closing the proof gap that gets contractors cited. What each permit must capture, the exact CFR that governs it, and how to build an audit trail OSHA accepts.