PCB, PCT, PBB, asbestos (dusts and fibers), ceramic based fibres similar to those of asbestos, leaded anti-knock compound sludges, tarry residues from pyrolysis, wastes, substances and articles containing, consisting of or contaminated with polychlorinated biphenyl (PCB) and/or polychlorinated terphenyl (PCT) and/or polybrominated biphenyl (PBB), including any other polybrominated analogues of these compounds, at a concentration level of 50 mg/kg or more