Furthermore, we examined fine-grained debris, probably accumulating for decades in the gutter of the roofing. This material showed a contamination of 28,410 pg dl-PCB-TEQ/g d.m., stimulating the definite GSK1838705A that dl-PCBs erode by atmospheric weathering from the surface of roofing plates and accumulated in debris of the gutter.
3.3. dl-PCB congener profiles
Fig. 2. Bar graph of percentage share of dl-PCBs determined in soil, stable dust, ACP, gutter debris, hens and eggs.Figure optionsDownload full-size imageDownload as PowerPoint slide
3.4. Concentrations and patterns of indicator PCBs
Fig. 3. Bar graph of percentage share of non-dl-PCBs determined in soil, stable dust, ACP, gutter debris, hens and eggs.Figure optionsDownload full-size imageDownload as PowerPoint slide
3.5. Levels of PCDD and PCDF congeners
Results of PCDD/Fs and PCBs found in samples of ACP-surface material, soil, laying hens and eggs.MatrixPCDD/Fsdl-PCBsPCDD/Fs + dl-PCBsNon-dl-PCBsACP-surface6.223.529.795,800Soil (backyard 1)3.842.646.4104,000Hens (backyard 1)0.5710.611.229,600Eggs (backyard 1)1.110.711.830,500PCDD/Fs and dl-PCBs are expressed in ng WHO-TEQ/kg d.m. in soil and ACP material and in pg WHO-TEQ/g of lipid in eggs and laying hens. Non-dl-PCBs are expressed in ng/kg d.m. for soil and ACP and in ng/kg lipid for eggs and laying hens. d.m. = dry matter.Full-size tableTable optionsView in workspaceDownload as CSV