Does anyone know of any qualification and/or training you need before you can do spot sampling in the workplace using gas detector tubes and a sample pump?

Most important thing to do is read the insructions for the tube VERY carefully, ie number of pump strokes, correct scale. Also the instructions for the sample pump too eg. how to know when the pressure has equalised. Be aware that gas tec type tubes are probably at best an indication of the presence of a substance (albeit this can even have interference) and the accuracy is not always good and subject to user interpretation. Depending on what you are using it for and how the sample was collected be wary of the results as it can give VERY different consequences. For example taking a sample right over a tin of paint could give a large positive reading, however taking a reading in their general work area or breathing zone may be completely different. One would identify a source, the other the actual exposure level. If this is going to be a regular task and you feel that they need to know more, or to be able to do more techincal / accurate measurements there is a course the BOHS do on work place hazard monitoring M102. Des

Thanks for you posts guys, that's the same thoughts I had on this subject. Basically we know we have Ozone generated from 25% chromium welding at the welding zone. We had an independent consultant company do tests and a report for us and we have implemented their recommendations. One of the recommendations was to use ozone filtering cartridges on our air fed welding masks. The air intake for these masks are kept on the welders back at waist height, away from the welding zone. I wanted to confirm the presence of ozone at this area also to back up the consultants recommendations for some of the welders who feel the ozone filters are too heavy and bulky.