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Hi, I am pretty new to contaminated land work, (6 months)and have managed to get my head around a lot of the risk assessment work but am now stumped when it comes to PCBs, and was wondering if there is anyone who may be able to give me some advice? We have picked up PCBs (7 congeners) in soil at a site (see below for an example of concentrations); PCB 28, <1 ug/kg PCB 52, 21 ug/kg PCB 101, 22 ug/kg PCB 118, 12 ug/kg PCB 138, 42 ug/kg PCB 153, 54 ug/kg PCB 180, 68 ug/kg from my understanding these are nastys and shouldn't be picked up at all, has anyone had any experience of carrying out a risk assessment with PCBs that might be able to give me some guidance or point me in the right direction? Its not something we have had to deal with before! Any advice would be greatly appreciated! Thanks, Heather