32
3.7
57
5.3
30
27
<d
Tire 1
Tire 2
2.8
56
7.3
80
3.4
9.5
5.4
67
6.9
2.7
37
2.0
<d
3.8
<d
<d
<d
4.6
9.7
<d
<d
<d
30
5.6
<d
<d
6.0
12
1.1
<d
<d
Wheel
<d
<d
2.6
10
5.4
Sampler
1.8
3.3
<d
2.2
25
<d
1.8
20
Legend
15
Surface
15 cm
30 cm
45 cm
10
Samples Collected
5m
HMX (g/kg)
Fort Richardson, AK
Hand Grenade Range
15
10
5m
Pit
Pit
Figure 14. Fort Richardson hand grenade range distribution of HMX
Overall, subsurface concentrations of these explosives-related analytes
decline rapidly below the surface soil at Fort Richardson. Because this grenade
range has a much harder surface than the range at Fort Lewis, much less mixing
of the soil profile is likely. Analytes found at depth were more likely to have
arrived there by leaching than by remixing due to heavy activity as observed at
Fort Lewis.
31
Chapter 2 Characterization of Explosives Contamination at Military Firing Ranges
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