Tag
Atmospheric Testing
2 OSHA and HazCom articles tagged "Atmospheric Testing" — practical, CFR-cited guidance verified against primary sources.
Safety
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.
Aug 10, 2026
14 min read
Safety
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.
Mar 9, 2026
17 min read