A California health advisory committee mulled the potential occupational exposure hazards of 10 substances – including arsine and gallium arsenide, which it has discussed before – on Dec. 14, ahead of eventual discussions on setting permissible exposure limits (PELs), but has not made any specific recommendations yet. The Health Expert Advisory Committee (HEAC), which offers recommendations to Cal/OSHA in tandem with the state's Feasibility Advisory Committee (FAC), also started preliminary discussion of ethanol, hydrogen sulfide, methyl isobutyl ketone, n-Propanol, three phthalates [butyl ben
December 30, 2025