## 3 Results and Discussion
### PCDD/F and DL-PCB Concentrations
The SAD sample contained a high percentage of 1,2,3,4,6,7,8-HpCDD (42%), which was different from the other sites. In other sites, the low-chlorinated PCDF concentrations were higher than other congeners, but no other constant trend was observed. These results may reflect a site-specific contamination source. \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \multicolumn{2}{c}{**Sampling Site**} & **NOR** & **NOT** & **GAM** & **SAS** & **ONA** & **MAT** \\ \hline \multirow{8}{*}{PCDDs} & 2,3,7,8-TeCDD & \textless{} LOD & \textless{} LOD & \textless{} LOD & n.a. & \textless{} LOD & \textless{} LOD \\ \cline{2-8}  & 1,2,3,7,8-PeCDD & \textless{} LOD & \textless{} LOD & 0.81 & n.a. & \textless{} LOD & \textless{} LOD \\ \cline{2-8}  & 1,2,3,4,7,8-HxCDD & \textless{} LOD & \textless{} LOD & 0.31 & n.a. & \textless{} LOD & 1.3 \\ \cline{2-8}  & 1,2,3,6,7,8-HxCDD & \textless{} LOD & \textless{} LOD & 1.7 & n.a. & \textless{} LOD & 4.1 \\ \cline{2-8}  & 1,2,3,7,8,9-HxCDD & \textless{} LOD & \textless{} LOD & 0.75 & n.a. & \textless{} LOD & 3.0 \\ \cline{2-8}  & 1,2,3,4,6,7,8-HpCDD & \textless{} LOD & \textless{} LOD & 5.7 & n.a. & \textless{} LOD & 17 \\ \cline{2-8}  & 0 CDD & 3.4 & 110 & 21 & n.a. & 7.6 & 51 \\ \cline{2-8}  & 2,3,7,8-TeCDF & \textless{} LOD & \textless{} LOD & 1.1 & n.a. & 1.0 & 2.0 \\ \cline{2-8}  & 1,2,3,7,8-PeCDF & \textless{} LOD & 1.2 & 0.38 & n.a. & 1.5 & 3.8 \\ \cline{2-8}  & 2,3,4,7,8-PeCDF & \textless{} LOD & 0.87 & 0.73 & n.a. & 1.0 & 1.1 \\ \cline{2-8}  & 1,2,3,4,7,8-HxCDF & \textless{} LOD & \textless{} LOD & 1.1 & n.a. & \textless{} LOD & 3.1 \\ \cline{2-8}  & 1,2,3,6,7,8-HxCDF & \textless{} LOD & \textless{} LOD & 1.3 & n.a. & \textless{} LOD & 3.2 \\ \cline{2-8}  & 2,3,4,6,7,8-HxCDF & \textless{} LOD & \textless{} LOD & 1.1 & n.a. & \textless{} LOD & \textless{} LOD \\ \cline{2-8}  & 1,2,3,7,8,9-HxCDF & \textless{} LOD & \textless{} LOD & \textless{} LOD & n.a. & \textless{} LOD & \textless{} LOD \\ \cline{2-8}  & 1,2,3,4,6,7,8-HpCDF & \textless{} LOD & \textless{} LOD & 1.6 & n.a. & 1.3 & 3.4 \\ \cline{2-8}  & 1,2,3,4,7,8,9-HpCDF & \textless{} LOD & \textless{} LOD & \textless{} LOD & n.a. & \textless{} LOD & \textless{} LOD \\ \cline{2-8}  & 0 CDF & \textless{} LOD & \textless{} LOD & \textless{} LOD & n.a. & \textless{} LOD & \textless{} LOD \\ \hline \multicolumn{2}{c}{Dioxins TEQ (pg-TEQ/g-dw)} & 0.00 & 0.33 & 1.86 & n.a. & 0.46 & 2.33 \\ \hline \multirow{8}{*}{non-_ortho_} & 3,4,4\({}^{\prime}\),5-TeCB(#81) & 5.3 & 4.9 & 48 & n.a. & 19 & 9.3 \\ \cline{2-8}  & 3,3\({}^{\prime}\),4,4\({}^{\prime}\),5-TeCB(#77) & 94 & 55 & 1100 & n.a. & 340 & 100 \\ \cline{2-8}  & 3,3\({}^{\prime}\),4,4\({}^{\prime}\),5-PeCB(#126) & 19 & 5.3 & 270 & n.a. & 51 & 40 \\ \cline{2-8}  & 3,3\({}^{\prime}\),4,4\({}^{\prime}\),5,5-HxCB(#169) & 1.3 & 3.1 & 12 & n.a. & 5.6 & 9.9 \\ \cline{2-8}  & 2\({}^{\prime}\),3,4,4\({}^{\prime}\),5-pentaCB(#123) & 4.1 & 2.0 & 55 & n.a. & 15 & 12 \\ \cline{2-8}  & 2,3\({}^{\prime}\),4,4\({}^{\prime}\),5-pentaCB(#118) & 220 & 97 & 5900 & n.a. & 1400 & 660 \\ \cline{2-8}  & 2,3,4,4\({}^{\prime}\),5-pentaCB(#114) & 6.7 & 3.5 & 130 & n.a. & 42 & 20 \\ \cline{2-8}  & 2,3,3\({}^{\prime}\),4,4\({}^{\prime}\),5-pentaCB(#105) & 100 & 46 & 2100 & n.a. & 390 & 270 \\ \cline{2-8}  & 2,3\({}^{\prime}\),4,4\({}^{\prime}\),5,5\({}^{\prime}\)-hexaCB(#167) & 11 & 9.2 & 510 & n.a. & 96 & 54 \\ \cline{2-8}  & 2,3,3\({}^{\prime}\),4,4\({}^{\prime}\),5-hexaCB(#156) & 18 & 13 & 1100 & n.a. & 160 & 110 \\ \cline{2-8}  & 2,3,3\({}^{\prime}\),4,4\({}^{\prime}\),5\({}^{\prime}\)-hexaCB(#157) & 6.8 & 3.4 & 200 & n.a. & 30 & 24 \\ \cline{2-8}  & 2,3,3\({}^{\prime}\),4,4\({}^{\prime}\),5\({}^{\prime}\)-hexaCB(#189) & \textless{} LOD & 3.0 & 34 & n.a. & 7.4 & 8.4 \\ \cline{2-8}  & DL-PCBs TEQ (pg-TEQ/g-dw) & 1.96 & 0.64 & 27.79 & n.a. & 5.37 & 4.34 \\ \hline \multicolumn{2}{c}{TOTAL TEQ (pg-TEQ/g-dw)} & 1.96 & 0.97 & 29.64 & n.a. & 5.83 & 6.68 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Cont.