We would anticipate the same findings for soils in and around Lemon Lane. Actual analytical results are attached. The key tables for evaluation are tables 2.3 and 4.2. The total dioxin and dibenzofuran TEFs need to be five times higher in fish before they reach the risk levels derived for PCBs. It should be noted that the comparison is worst case, as whole fish PCB data was not available.
National surveys show that whole fish have about twice the contaminant levels as fish fillets.
Therefore, about ten times the amounts of dioxin and dibenzofurans, as TEFs, would be needed before they equaled the cancer risks from PCBs. Therefore, concentration levels for the dioxin and dibenzoffirans would need to be at least 20 fold greater to match those non-cancer risks from PCBs. These findings are not unexpected. PCBs dominate human health cancer and non-cancer risks, unless where fires have occurred which can generate dibenzofurans and dioxin, the later when chlorobenzenes or related compounds are present. Some questions have been raised regarding the need to test for dioxin like PCBs.