When using an MSDS to comply with the Process Safety Information requirement 1910.119(d)(1)(ii) Permissible exposure limits, is it ACCURATE to use the 8-hr TWA Permissible Exposure Limit (PEL) when the workers work 12-hour shifts? My article last week has stirred a lot of emotions from those who do a lot of “referencing” in their SOPs. So I was asked to poll the members to see what they think, so….