Has any one any experience of completing works in areas known to be high in Radon. A radon specialist has given us a safe working time limit for a basement of several hours per week. If anyone has a radon policy or procedure that I could see that would be great.

I agree with Brian - my University is allegedly within a low risk area but we have found a relatively high level in one basement area so pockets do exist. It appears that the 'map' is based on predicted levels arising from the geology and until actual readings are taken will remain so. If no monitoring has been undertaken in an area (as in our case) there will be no indication on the map. Vice versa...

The amount of time is based on exposure limits so yes it is dependant on how often you are entering the area. The problem is what other areas will your staff be working in? Is it possible that they will be exposed to other high Radon areas so difficult to work out a "safe" exposure limit on this one site info alone, what is ok for the staff working there full time may not be ok you and your staff. Radon is a complex situation and unfortunately we don't really fully understand the level of exposure to the UK workforce.

Sharks Speak to the companies radiation adviser - if high Radon levels have been identified they should have appointed one. They should be able to give you advice based on the amount of time your staff are exposed but as I say they may be reluctant to give firm times as they will not know other radon exposure.