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PCB congener profiles of the air above IHSC, Aroclors 1254 and 1016, and average congener profiles of East Chicago (EC) school outdoor air and East Chicago school indoor air from the four EC schools in this study. Profiles are normalized to total PCB concentration. Error bars represent the standard deviation. Profiles are grouped by color according to profile similarities as described in the text. PCBs discussed in the text are labeled in the relevant profiles.
