
Construction
Asbestos in Construction: OSHA 1926.1101 PEL, Classes I-IV Work & Required Controls
OSHA's construction asbestos standard 29 CFR 1926.1101 sets a 0.1 f/cc PEL, a 1.0 f/cc excursion limit, and four classes of asbestos work, each with its own engineering controls, regulated-area rules, and worker protections. This is the full breakdown.
Jun 25, 2026
16 min read

Construction
Hexavalent Chromium in Construction (1926.1126): PEL, Welding & Required Monitoring
OSHA's construction hexavalent chromium standard 29 CFR 1926.1126 sets a 5 µg/m³ PEL and a 2.5 µg/m³ action level. OSHA names welding on stainless steel as a major exposure source.
Jun 25, 2026
8 min read