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                              <gco:CharacterString>Guide INSPIRE sur les installations de suivi environnemental</gco:CharacterString>
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                  <gco:CharacterString>La mesure de la qualité de l’air ambiant est réalisée conformément aux recommandations du référentiel métier du Laboratoire Central de Surveillance de la Qualité de l’Air (LCSQA), dans le respect des exigences réglementaires en vigueur. Ces prescriptions visent l’ensemble de la chaîne de mesure, tant du point de vue des critères d’implantation des sites de mesure, du choix des méthodes d’analyse mises en œuvre, du suivi de la conformité métrologique du processus de mesure, de la validation et de l’agrégation des données de mesure.

Pour produire cette donnée en particulier, Air Pays de la Loire met en œuvre des systèmes de prélèvement. Ces derniers sont implantés dans des stations de mesure sur site. Ces prélèvements sont ensuite transmis à un laboratoire d'analyse pour déterminer des concentrations sur la période de prélèvement, puis intégrés au système central pour être expertisés (validations technique et environnementale). Les données par période sont ainsi validées puis agrégées en moyennes mensuelles, elles-mêmes agrégées en moyennes annuelles.

La couche d'information produite est disponible pour une exploitation à une échelle variant du 1/250 000ème au 1/10 000ème et peut être catégorisée par typologie de station :
Station de trafic : 1/10 000
Station de fond : 1/30 000 (urbaine) à 1/250 000 (rurale)
Station industrielle : 1/100 000</gco:CharacterString>
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