reg 6 Prevention and reduction of exposure
(1) Where the results of a regulation 4 assessment reveal a risk to workers' health or safety from their exposure, the employer shall take the steps required by this regulation to prevent that exposure. (2) The employer shall replace the carcinogen or mutagen as mentioned in regulation 5(1). (3) Where that is not possible the employer shall ensure that the carcinogen or mutagen is, so far as technically possible, manufactured or used in a closed system. (4) Where a closed system is not technically possible, the employer shall ensure that the level of exposure of workers is reduced to as low a level as is technically possible. (5) In no circumstances shall exposure exceed the limit values set out in the table in Schedule 2. (6) Wherever a carcinogen or mutagen is used, the employer shall, in addition to the measures required by the preceding provisions of this regulation, take all the measures specified in Schedule 3. (7) In this regulation and in Schedule 2 “ limit value ” means, unless otherwise specified, the limit of the time-weighted average of the concentration for a carcinogen or mutagen in the air within the breathing zone of a worker in relation to a specified reference period as set out in that Schedule.