If the threshold set by article R. 1334-29-3 of the Public Health Code is exceeded in the buildings, equipment, installations or structures in which or in the environment of which the operation is carried out, the operations must be stopped immediately and corrective and preventive measures put in place to ensure compliance with this threshold.
The employer shall immediately inform the client and the competent prefect for the location of the worksite of the exceedance, its causes and the measures taken to remedy it.