I. – Radon activity by volume is measured using passive integrated radon measurement devices under conditions that guarantee the representativeness of the measurement.
II. – The analysis of these passive integrated radon measurement devices is carried out by bodies accredited by the French Accreditation Committee or by another member body of the European Cooperation for Accreditation that has signed multilateral mutual recognition agreements.
As part of the accreditation procedure, these bodies participate, at their own expense, at least once every three years in intercomparison tests organised by the Institut de Radioprotection et de Sûreté Nucléaire.
The accredited bodies draw up analysis reports which they send to the clients within a maximum of two months of receiving the integrated radon measurement equipment.