OAR 437-002-2026: Permissible Exposure Limit (PEL)

(1) Time-weighted average (TWA) PEL. The employer must ensure that no employee is exposed to an airborne concentration of beryllium in excess of 0.2 µg/m3 calculated as an 8-hour TWA. (2) Short-term exposure limit (STEL). The employer must ensure that no employee is exposed to an airborne concentration of beryllium in excess of 2.0 µg/m3 as determined over a sampling period of 15 minutes.