The BC Safety Docs Blog
Practical writing on confined spaces, atmospheric testing, hazard assessments, and the paperwork that keeps BC crews safe — from people who've worked the emergency response side of it.
Confined Spaces · Atmospheric Testing
The gap between normal air and legally oxygen-deficient is 14,000 ppm. H2S is IDLH at 100. A space can hold ten times the lethal concentration of hydrogen sulphide and your oxygen sensor will not move — here's the math, and what it means for your entry permit.
July 9, 2026 · 5 min read · Read article →