Agent Orange Footprint Still Visible in Rural Areas of Central Vietnam

Table 2

The contents of individual PCDD/F levels in soils and sediments (pg WHO-TEQ/g); 𝑛=52.

Congeners	Min	Max	Average	Standard deviation	Median	MAD
2,3,7,8-TCDD	<DL	5.50	0.449	1.06	<DL	<DL
1,2,3,7,8-PeCDD	<DL	2.80	0.069	0.407	<DL	<DL
1,2,3,4,7,8-HxCDD	<DL	0.920	0.021	0.132	<DL	<DL
1,2,3,6,7,8-HxCDD	<DL	1.40	0.042	0.204	<DL	<DL
1,2,3,7,8,9-HxCDD	<DL	2.30	0.139	0.369	<DL	<DL
1,2,3,4,6,7,8-HpCDD	<DL	3.30	0.171	0.474	0.051	0.026
OCDD	<DL	5.70	0.408	0.851	0.180	0.113
2,3,7,8-TCDF	<DL	0.036	0.001	0.005	<DL	<DL
1,2,3,7,8-PeCDF	<DL	<DL	<DL	<DL	<DL	<DL
2,3,4,7,8-PeCDF	<DL	0.083	0.002	0.012	<DL	<DL
1,2,3,4,7,8-HxCDF	<DL	0.084	0.003	0.017	<DL	<DL
1,2,3,6,7,8-HxCDF	<DL	0.084	0.002	0.012	<DL	<DL
1,2,3,7,8,9-HxCDF	<DL	<DL	<DL	<DL	<DL	<DL
2,3,4,6,7,8-HxCDF	<DL	0.055	0.002	0.009	<DL	<DL
1,2,3,4,6,7,8-HpCDF	<DL	0.280	0.016	0.041	<DL	<DL
1,2,3,4,7,8,9-HpCDF	<DL	0.005	<DL	0.001	<DL	<DL
OCDF	<DL	2.20	0.094	0.377	<DL	<DL
WHO-PCDD/F TEQ (pg/g)	<DL	24.7	1.42		0.231

MAD: median absolute deviation; <DL: value under detection limit of the analytical method.