Posted By Smurfer We all know that COSHH requires exposure to asthmagens (and carcinogens) to be controlled to as low a level as reasonably practicable, which normally would mean LEV and RPE to a high standard. However, what controls would be considered necessary if sampling had been unable to detect the substance of concern? e.g. if a WEL was 10mg/m3 and your limit of detection was 0.1mg/m3. My gut feeling is that no additional controls would be required, otherwise we'd be all running around the local high street wearing RPE. ;-)

Posted By Adrian Watson It depends upon the sampling methodology and results. If the sampling is in accordance with BS 689:1996 and the revevant MDHS's then you would be able to rely on the results being low enough to justify taking no further action, providing you have met the test of "reasonably practicalability" . Regards Adrian Watson

Posted By Frank Hallett Hi Smurfer It actually comes down to how you [corporately] define that wonderful phrase "reasonably practicable" and how you [corporately and personally] define what workplace precautions and supporting risk control systems may be necessary. On the face of it, and assuming that the atmosphere measuring was done by a competent person, you will probably only need to implement a relevant form of atmosphere and health monitoring; but not necessarily health surveillance. Frank Hallett

Posted By Smurfer Thanks for your responses guys.