During the preparation phase of the operation, the employer shall put in place collective protection measures appropriate to the nature of the operations to be carried out, to prevent the dispersion of asbestos fibres outside the work area and to reduce the concentration of asbestos fibres to the lowest level technically possible.
These means include :
1° Dust suppression ;
2° Dust extraction at source;
3° Continuous sedimentation of airborne fibres;
4° Appropriate means of decontamination.