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Table 4.4   Concentrations of dioxin and furan congeners in soil, fishpond sediment, animal tissues and whole human blood, (pg/g dry weight [soils], pg/g wet weight [biological tissues]), central and southern Viet Nam, November 1997.
 
Sample Location and Type Polychlorinated dioxin/furan congener concentration (pg/g)    
Sample Total Total Total Total Total 2,3,7,8- Total Total Total Total Total Total % 2,3,7,8-
ID T4CDD P5CDD H6CDD H7CDD O8CDD T4CDF T4CDF P5CDF H6CDF H7CDF O8CDF TEQ T4CDD of TEQ
A So, Aluoi Valley, central Viet Nam (Exposed)                              
Soil (0 to 10 cm)                              
Manioc field 97VN001 6.61 8.26 1.56 8.49 10.92 142.29 0.64 3.17 0.87 0.55 0.92 1.61 7.01 94.3%
Ploughed field 97VN013 4.20 6.49 2.93 10.49 10.88 136.34 0.24 1.66 0.78 ND 0.78 1.95 4.53 92.7%
Former airbase 97VN051 897.85 897.85 7.76 24.35 68.44 563.84 10.46 30.30 23.59 8.19 19.83 16.50 901.22 99.6%
Former airstrip 97VN057 88.32 88.32 7.40 19.83 65.82 697.05 3.08 11.27 6.94 8.94 22.37 30.31 92.21 95.8%
Fish pond sediment                              
Fish pond #1 97VN005 5.2 9.9 13 10 5.3 64 0.3 2.3 1.1 0.3 ND ND 5.9 88.1%
Fish pond #2 97VN007 5.4 7.1 4.5 9.3 7.9 170 0.3 1.5 0.9 0.2 ND ND 6.0 90.0%
Fish pond #3 97VN009 8.5 11 3.3 5.8 9.4 220 0.5 2.2 1.1 0.2 ND ND 9.2 92.4%
Fish pond #4 97VN011 1.8 3.3 2.5 1.5 1.4 23 0.1 0.6 0.4 ND ND ND 2.0 90.0%
Animal tissue                              
Grass carp fat (pond#1) 97VN019 7.9 10 2.3 1.5 1.6 2.9 2.3 13 3.4 0.5 0.4 NDR 8.7 90.8%
Grass carp fat (pond#2) 97VN027 16 20 4.2 1.4 0.7 1.0 2.4 11 4.0 1.1 0.1 ND 16.7 95.8%
Grass carp fat (pond#3) 97VN031 21 25 4.0 0.6 0.8 3.3 4.0 15 5.0 ND 0.5 ND 22.4 93.8%
Grass carp fat (pond#4) 97VN039 34 41 9.5 1.8 0.2 0.6 4.4 15 5.3 0.6 0.2 0.1 35.4 96.0%
Duck fat 97VN045 6.1 7.0 3.4 0.8 ND 2.2 1.1 2.7 2.1 ND ND ND 7.0 87.1%
Human blood (lipid basis)                              
Males, age >25 97VN047 31 31 ND 6.9 10 52 ND ND 3.4 17 ND NDR 37.2 83.4%
Females, age >25 97VN048 11 11 ND ND 14 64 ND ND ND ND ND NDR 14.3 76.9%
Males, age 12 to 25 97VN049 21 21 ND ND 10 NDR ND ND ND 14 24 76 25.5 82.4%
Females, age 12 to 25 97VN050 12 12 ND ND 19 50 ND ND ND ND 12 ND 15.4 78.0%
Rang Rang, Ma Da forest region, southern Viet Nam (Exposed)                              
Soil (0 to 10 cm)                              
South of former airstrip 97VN075 7.86 10.13 1.41 7.22 6.62 16.58 1.03 4.02 1.54 0.51 ND 0.81 8.44 93.1%
North of Ma Da River 97VN077 19.10 24.88 8.94 26.37 7.54 26.86 2.48 8.98 5.42 1.13 1.44 1.40 20.33 93.9%
At former airstrip 97VN079 1.82 2.46 3.76 7.60 9.58 24.91 0.59 1.15 0.71 ND 1.07 ND 2.37 76.8%
Sediment                              
Fish pond near Ba Hao 97VN073 7.80 9.71 ND ND 5.85 29.51 0.59 0.88 1.07 ND 1.32 1.41 7.93 98.4%
Ba Hao Reservoir 97VN089 2.28 3.34 ND 7.59 10.40 18.76 0.27 2.12 ND ND 1.01 0.69 2.64 86.4%
ND = Not detected; for 'Total TEQ' calculations, if ND, ½ detection level was used.
NDR = Peak detected but did not meet quantification criteria; for 'Total TEQ' calculations, NDR was treated as ND.