California moves forward with PEL for Peracetic Acid

This week California’s Health Effects Advisory Committee (HEAC) decided to move forward with a permissible exposure limit (PEL) for peracetic acid (PAA) of 0.2 ppm (8 hr time weighted average (TWA)) and a 0.4 ppm short term exposure limit (STEL) or 15 minute TWA. The meeting was held at the Harris State building in Oakland on December 12th and ChemDAQ’s Richard Warburton was there.

The STEL is the same as the ACGIH STEL TLV for PAA and so elicited little comment. The initial proposal for the 8 hour PEL was 0.15 ppm, ChemDAQ proposed 0.3 ppm (we were the only other organization that proposed a PEL), and the committee settled on 0.2 ppm. The HEAC recommendation will now go to the California’s Occupational Safety and Health Standards Board for further public comment and consideration before it becomes law.

The occupational exposure levels for gases and vapors vary from country to country and state to state and all ChemDAQ monitors have user adjustable alarms. If the 0.2 ppm PEL goes into effect, ChemDAQ users can adjust the alarm levels of their monitors accordingly.

If you would like more information on ChemDaq’s PAA monitoring systems, please contact Trinity Medical at 01 4604356 or by email at

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