PCBs: 2-chlorobiphenyl, 2,3- Dichlorobiphenyl, 2,4,5-Trichlorobiphenyl, 2,2’,4,4’-Tetrachlorobiphenyl, 2,2’3’,4,6-Pentachlorobiphenyl, 2,2’,4,4’,5,6’-Hexachlorobiphenyl, 2,2’,3,3’,4,4’,6’-Heptachlorobiphenyl, 2,2’,3,3’,4,5’,6,6’-Octachlorobiphenyl