This standard specifies a method for the on-site installation, retrieval and testing of geosynthetic samples, irrespective of the particular degradation mechanisms to which they are exposed. The method is also appropriate to test for mechanical damage, much of which occurs during installation, and to provide an owner with information about the state of the geotextile or geotextile-related product in his structure. NOTE the durability of geosynthetics is assessed by short-term accelerated under conditions more extreme than those experienced in service. In order to establish the validity of these it is essential to compare their predictions with these made on material extracted from site.