Table 15. Soilwater partition coefficients (Kd) in L/kg and
linear regression coefficients (R2) for Fort Leonard Wood
soils.
2,4,6-TNT
2,4-DNT
Soil
R2
R2
sample
Kd
Kd
4
10.0
0.82
2.6
0.72
5
8.9
0.64
6.4
0.88
8
3.6
0.20
3.7
0.93
1R
16.2
0.98
1.9
0.34
2R
14.9
0.97
4.7
0.57
6R
1.4
0.80
1.2
0.30
9R
2.0
0.68
2.6
0.54
12R
2.4
0.65
2.6
0.51
7b
1.9
0.52
1.5
0.54
16b
3.2
0.78
2.5
0.96
17b
4.4
0.99
3.7
1.00
23b
3.0
0.68
2.0
0.84
25b
2.5
0.82
2.1
0.92
for all the analytical results). ERCs were detected in 28
DNT, 2-ADNT, 4-ADNT, and 2,4,6-TNT. The highest
of these soil samples. Of these samples, 42 were of sur-
concentrations were detected in the soil segments near-
face soils; ERCs were detected in only four of them.
est the mines, generally in the 10- to 15-cm depth zone.
Concentrations as high as 4270 g/kg were detected in
Samples that were collected deeper and closer to the
this zone for 2,4,6-TNT, 3510 g/kg for 2,4-DNT, 2690
mine were much more likely to produce positive
g/kg for 2-ADNT, and 2760 g/kg for 4-ADNT.
detections. The chemicals of interest detected in these
soils (in order of their frequency of detection) were 2,4-
The frequency of detection was highest overall for
DNT, 2-ADNT, 4-ADNT, 2,4,6-TNT, 1,3-DNB, 2,6-
the TMA-5 mines. The concentrations of these four
DNT, and TNB (Table 16).
compounds declined rapidly for soil samples collected
There was a substantial difference in the frequency
nearer the surface for TMA-5 mines (Table 16). For
of detection of ERCs near the different types of mines
soils collected at the surface, concentrations were quite
(Table 16). The highest frequency of detection was for
low; the highest concentration found for 2,4-DNT at
the surface was 60 g/kg, for 2-ADNT was it 90 g/kg,
the TMA-5 mines, where ERCs were detected in 23 of
for 4-ADNT was it 70 g/kg, and for 2,4,6-TNT it was
the 94 samples collected (24%). The chemicals present
only 5.2 g/kg. The identity and concentrations of ERCs
most often, and at the highest concentration, were 2,4-
Table 16. Frequency of detection of ERCs in soil samples collected near buried mines in August
1998.
Number of detections
Total soil samples (surface samples**)
Mine
Soil samples
type
collected*
2,4-DNT
2,4,6-TNT
1,3-DNB
2-ADNT
4-ADNT
2,6-DNT
TNB
PMA-1A
20 (9)
3 (0)
3 (0)
3 (0)
4 (1)
4 (1)
1 (0)
0 (0)
PMA-2
9 (2)
1 (0)
1 (0)
1 (0)
0 (0)
0 (0)
1 (0)
0 (0)
TMA-5
94 (27)
23 (3)
20 (2)
15 (0)
23 (3)
23 (3)
9 (0)
1 (0)
TMM-1
20 (4)
0 (0)
0 (0)
0 (0)
0 (0)
0 (0)
0 (0)
0 (0)
*Numbers inside parenthesis in the Soil samples collected column refer to the number of surface soil samples that were
collected for a given mine type.
**Numbers inside parenthesis in the Number of detections columns refer to the number of surface soil samples in which
ERCs were detected for a given mine type.
14
to contents
Previous Page
