European Waste Catalogue (EWC) Code
10 01 22* – aqueous sludges from boiler cleansing containing hazardous substances
Chapter
10wastes from thermal processes
Sub-Chapter
10 01wastes from power stations and other combustion plants (except 19)
Individual Entry
10 01 22*
aqueous sludges from boiler cleansing containing hazardous substances
Mirror Hazardous
* Signifies Hazardous Waste

Mirror Hazardous - Some wastes are not automatically hazardous or non-hazardous - they are called mirror entry wastes. These wastes have a hazardous waste entry (or entries) marked with an asterisk (*), and an alternative non-hazardous waste entry (or entries) not marked with an asterisk