On 10 April 2013, IARC*, the international body for cancer research, a United Nations agency, changed the classification of the PCB agent from Group 2A to Group 1.
This means that PCB, which had previously been considered "probably carcinogenic", is now included among the agents that are "carcinogenic for humans".
See the summary or download the original report from the IARC website

In particular, this reclassification is based on the selective deteremination (out of 209 possible congeners) of the 12 most dangerous "Doixin Like" congeners (PCB: 77, 81, 105, 114, 118, 1123, 126, 156, 157, 167, 169 and 189) correlated to their Toxicity Equivalent Factor (TEF).
This issue has been one of the strengths of Sea Marconi since its founding; over the last 20 years, guidelines as well as industry standards (e.g. CEI 10-38 2003 and CENELEC CLC/TR 50503-2010 Art.6.61 page 14; Annex H; Annex I) on the management of electrical equipment with oil contaminated by PCBs have benefited from the contribution of Sea Marconi's expertise and experience.

At the last international conference in Geneva, there was talk of 2028 as the target year for the complete decontamination of PCBs worldwide; nevertheless, the regulatory scenario in the world is extremely diverse: in Italy and Europe the limit for PCBs is 50 mg/kg (even if the threshold of 25 mg/kg is a shield against possible temporary stocking, transfer of oils or future revisions of the standard), but in some countries the limit has been reduced to 2 mg/kg. Then there are cases such as Japan where the legal limit for PCB is 0.5 mg/kg.
Naturally, Sea Marconi is at the forefront in the battle against PCB. Already in the 1980s, the company had developed and patented a solution (CDP Process®) which is now considered the best available technique (BAT) according to the Ministry of Environment for the decontamination of in-service or end-of-life electrical equipment contaminated with PCBs .
Sea Marconi's "PCB-Free Programme" includes products, services and technologies aimed at proper management of the life cycle (LCM - Life Cycle Management) of transformers, capacitors, reactors and so on with oil and PCBs. Among these are, for example, ACCREDIA accredited analyses of PCBs and subsequent diagnoses; the CDP Process®, namely the treatment for the removal of PCBs from oil and transformers with patented reagents and proprietary units; there are also kits for in-field establishment of PCB content (SM-TCPS Kits); training at Sea Marconi or at the customer; management of environmental crises as a result of contamination of soil, water and air.
Sea Marconi is constantly carrying our research on PCBs and the new IARC classification encourages us to continue the development of analytical methods for the establishment of selected PCB congeners.
_________
* IARC, or CIRC, is the acronym for International Agency for Research on Cancer, or Centre International de Recherche sur le Cancer, the international body, based in Lyon, France, which sets risk classification guidelines related to tumours caused by chemical and physical agents, among other activities. The intergovernmental IARC is part of the World Health Organization (WHO) of the United Nations.