If, despite the measures taken by the employer to limit the risks, the exposure limit values are exceeded, the employer must take immediate action in order to reduce exposure to an authorised level.

1. Where, in given zones or agglomerations, the levels of pollutants in ambient air exceed any limit value or target value or concentration cap, plus any relevant margin of tolerance in each case, Member States shall ensure that plans or programmes are established for those zones and agglomerations in order to achieve the related limit or target value or concentration cap specified in Annexes XI and XIV.

This directive should also, therefore, be reviewed in 2008 in order for it to be possible to reduce the limit values further.

(s) "limit value" shall mean a value of Lden or Lnight, and where appropriate Lday and Levening, as determined by the Member State, the exceeding of which causes competent authorities to consider or enforce mitigation measures; limit values may be different for different types of noise (road-, rail-, air-traffic noise, industrial noise, etc.), different surroundings and different noise sensitiveness of the populations; they may also be different for existing situations and for new situations (where there is a change in the situation regarding the noise source or the use of ...[+++]the surrounding).

The proposal reduces the limit value for the number of asbestos particles to which workers may be exposed. In view, however, of the danger presented by asbestos, it is good that the rapporteur try to have the limit value reduced further.

"limit value" means a value of Lden or Lnight , as declared by the Member State , the exceeding of which causes competent authorities to consider or enforce mitigation measures and measures to reduce the causes of the exceeding of the limit values;