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Site specific congener profiles for Cleveland sites 15(a) and 20(b) and Chicago sites 18(c) and 45(d). Site 15 for Cleveland and site 18 for Chicago represent high ∑ PCB concentrations and are well correlated to Aroclor mixture profiles. Site 20 for Cleveland and site 45 for Chicago represent low ∑ PCB concentrations and are poorly correlated to Aroclors, exemplifying the differences in congener profiles in intra-city environments.
