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This standard (EN 16321-2:2013) has been prepared by Working Group 7 "Stage II vapour recovery systems at filling stations" (secretariat: DIN, Germany) of Technical Committee CEN/TC 393 "Equipment for storage tanks and for filling stations" (secretariat: DIN, Germany). On the German side Working Committee NA 104-02-11 AA "Gasrückführung an Tankstellen" ("Vapour recovery at filling stations") of the Tank Installations Standards Committee (NATank) at DIN, the German Institute for Standardization e. V. participated in the preparation of the standard. The standard specifies the test methods for verification of vapour recovery systems at service stations (Stage II). It does not specify test methods for the air and vapour tightness testing of the vapour recovery systems at service stations.