Stratégie d’échantillonnage: ❒ détermination de l’objectif de la stratégie d’échantillonnage en ce qui concerne le but, la méthode d’échantillonnage et le nombre d’échantillons; ❒ accès aux informations pertinentes en ce qui concerne les bâtiments, les structures techniques et les structures de gestion (par exemple, ventilateurs, filtres, canalisations, systèmes de conditionnement d’air, etc) sont accessibles;
Sampling strategy ❒ goal of sampling strategy is defined as regards purpose, sampling method and number of samples ❒ access to relevant information regarding buildings, technical and managerial structures (e.g. fans, filters, ductwork, air-conditioning systems, etc.) ❒ define risk limits ❒ define geographical dispersion areas and moving objects in the area to be sampled ❒ define percentage of negative controls (field blanks) in the total number of samples and how to obtain them. Bulk sampling: bulk samples can help investigators characterise the presence of contamination on building materials