Posted By Adrian Watson Scott, I'm sorry to say this is one occassion if you need to ask, you cannot do. The process is not simple even if you do have the knowledge. Get a competent occupational hygienist to help you. The information required by the risk is no different from any other. Reg 6(2) states "The risk assessment shall include consideration of - (a) the hazardous properties of the substance; (b) information on health effects provided by the supplier, including information contained in any relevant safety data sheet; (c) the level, type and duration of exposure; (d) the circumstances of the work, including the amount of the substance involved; (e) activities, such as maintenance, where there is the potential for a high level of exposure; (f) any relevant occupational exposure standard, maximum exposure limit or similar occupational exposure limit; (g) the effect of preventive and control measures which have been or will be taken in accordance with regulation 7; (h) the results of relevant health surveillance; (i) the results of monitoring of exposure in accordance with regulation 10; (j) in circumstances where the work will involve exposure to more than one substance hazardous to health, the risk presented by exposure to such substances in combination; (k) the approved classification of any biological agent; and (l) such additional information as the employer may need in order to complete the risk assessment." I know that this is not the answer you wanted. Regards Adrian Watson FFOHS Registered Occupational Hygienist