EWC. Within the European Union there is a system concerning the classification of wastes, the European Waste Catalgue. This EWC is refered to in a number of EU directives and commission decisions. The actual "classification" system can be seen at the following external link:

http://www.europa.eu.int/eur-lex/en/consleg/pdf/2000/en_2000D0532_do_001.pdf?lang=_e