tection and the concentrations for ADNTs, 2,4-DNT,
greater than for 2,4-DNT or 2,4,6-TNT. Generally, when
and 2,4,6-TNT in surface soils for the two TMA-5 mines
ERCs were detected in soil collected along an edge or
are presented in Figure 7. Similar plots for the two
at a corner of the mine, they were also detected in sur-
PMA-1As are shown in Figure 8.
face samples collected 7 cm away from that position.
For the TMA-5s, surface ERCs remained heteroge-
Concentrations of ERCs remained in the thousands of
neously distributed around their perimeters, with no
micrograms per kilogram under the mines, indicating
detectable ERCs directly above them (Fig. 7). In most
that there appears to be no reduction in ERCs evolving
cases surface concentrations of the ADNTs were much
from these mines, a year after burial. If anything, the
TMA-5 (EX-292)
July 1999
Surface Soil
N
Height= 113 mm
W
E
S
8
2
DNT
70 mm
TNT
Am-DNT
312 mm
22
4
8
3 48
15
2 78
432
30
2 479
a. EX-292.
TMA-5 (EX-253)
July 1999
27 5
Surface Soil
4
N
Height= 113 mm
W
E
S
DNT
70 mm
TNT
Am-DNT
312 mm
9
104
14
b. EX-253.
Figure 7. Locations of various ERCs detected in surface soil near buried TMA-5 land mines
in July 1999.
22
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