2710.91.00.50 - Other, containing polychlorinated terphenyls (PCTs) or polybrominated biphenyls (PBBs), whether or not also containing polychlorinated biphenyls (PCBs) at a concentration level of less than 50 mg/kg

This HTS classification covers waste oils that are specifically characterized by the presence of polychlorinated terphenyls (PCTs) or polybrominated biphenyls (PBBs). Importantly, these oils may also contain polychlorinated biphenyls (PCBs), but only at a concentration level below 50 mg/kg. This category is intended for those waste oil streams where PCTs or PBBs are a defining component, regardless of the presence of PCBs below a de minimis threshold.

The critical distinction for this category lies in the specific contaminants and their concentration. It is differentiated from its sibling category, 2710.91.00.10, by the presence of PCTs or PBBs and the explicit concentration limit for PCBs. Category 2710.91.00.10 exclusively addresses waste oils where PCBs are present at a concentration of 50 mg/kg or more, without specifying the presence of PCTs or PBBs. Therefore, the focus here is on waste oils contaminated with PCTs/PBBs, with a defined upper limit for PCB co-contamination.

As this classification represents a leaf node, there are no further subcategories. Classification under 2710.91.00.50 is final based on the identification and concentration of PCTs, PBBs, and PCBs within the waste oil. Importers and exporters should ensure laboratory analysis confirms the presence of PCTs or PBBs and the PCB concentration meets the specified < 50 mg/kg threshold for accurate declaration. Examples of such waste oils could include certain industrial lubricants or hydraulic fluids that have become contaminated with these specific persistent organic pollutants.