|  | Indoor air(ng/m3)a | House dust (micrograms/gram)a | Serum (ng/g lipid) | ||||
---|---|---|---|---|---|---|---|---|
Home | Participant | Initial PCBs, LR [52,105,153] | Follow-up PCBs LR (BR) [52,105,153] | Initial PCBs [52, 105, 153] | Follow-up PCBs [52, 105, 153] | Total PCBs (# congeners detected)b | Sum 10 PCB congenersc | 4,4'-DDEd |
1 | 1-A | 23 [19, 4, <2] | 21 (<68) [10, 2.9, 7.7] | 21 [1.1, 14, 5.8] | 190 [15, 53, 119] | 1630 (13) | 1520 | 848 |
 | 1-Be |  |  |  |  | 993 (11) | 967 | 208 |
2 | 2-A | 35 [25, 6.7, 3.6] | 8.0 (13) [8, <2.8, <2.8] | 68 [16, 35, 17] | 140 [37, 34, 69] | 760 (16) | 652 | 292 |
 | 2-B |  |  |  |  | 179 (5) | 179 | 96 |