A post I made on another board regarding a discussion about what makes an atm a hazardous atm…
just exceeding a PEL does not make the atm hazardous under the PRCS std.
You are correct that OSHA has stated an atmosphere that contains a substance at a concentration exceeding a permissible exposure limit intended solely to prevent long-term adverse health effects is NOT considered to be a hazardous atmosphere on that basis ALONE.