Posted By Paul Leadbetter Joe The WELs should be treated as MELs; that is, they must not be exceeded. There are both short-term and long-term limits, as before. All of the old MELs, and some of the OESs, have become WELs but the HSE have decided to delete OESs that lacked a rigorous scientific basis. I think about 100 of the OESs have gone but you still have to control exposure (in line with the principles of good practice) if it cannot be prevented. Paul

Posted By Ron Hunter No disrespect, but if you don't understand that, are you the right person to be doing the COSHH Assessments? Competency and all that!