This document specifies the relevant characteristics of geosynthetic barriers, including polymeric geosynthetic barriers, clay geosynthetic barriers and bituminous geosynthetic barriers used as fluid barriers in the construction of hazardous liquid containment and secondary containment around storage facilities for hazardous liquids and the appropriate test methods to determine these characteristics. NOTE This document is not applicable to applications where a second geosynthetic barrier is installed immediately beneath an upper geosynthetic barrier in order to reduce the overall permeability of the barrier. Such double lined systems are the subject of the required characteristics for the relevant application. The intended use of these products is to control the leakage of fluids through the construction. This document is not applicable to geotextiles or geotextile-related products as defined in EN ISO 10318-1. This document provides for the evaluation of conformity of the product. This document defines requirements to be met by manufacturers and their authorized representatives with regard to the presentation of product properties.