Reference

OSHA never writes 'yellow A-frame' into a standard. What 29 CFR 1910.22 requires is that walking-working surfaces be kept clean, orderly, and — where possible — dry, and that hazardous conditions be corrected or guarded. Posted warnings during mopping and spills are the universally recognized way…

OSHA's sanitation standard (29 CFR 1910.141) sets the floor for general industry: toilet facilities provided by workforce size, kept sanitary, with hand-washing provision — and employees must have availability, meaning prompt access without unreasonable restriction (a point OSHA has reinforced in…

What Happens If a Respirator Doesn't Fit: A respirator that does not seal properly against the face stops working as rated. Fit failure collapses the assigned protection factor (APF) - a half-face respirator with an APF of 10 can deliver as little as 2× protection if the face seal leaks.

Can You Reuse an N95: N95 filtering facepiece respirators (FFRs) are designated as single-use devices under NIOSH's 42 CFR Part 84 approval system. NIOSH does not approve any N95 for routine reuse.

NIOSH vs. OSHA Explained (2026 Guide): NIOSH (National Institute for Occupational Safety and Health) is a research and certification agency within the CDC that approves PPE and sets recommended exposure limits.