Table 4. Concentrations of HMX and RDX (mg/kg) by SW-846 Method 8330 at firing range 48

Table 4. Concentrations of HMX and RDX (mg/kg) by SW-846 Method

8330 at firing range 48 (location 148).

Sample

015 cm

1530 cm

3045 cm

4560 cm

HMX

RDX

about equal concentrations in grids A, B, and C,

from grids C and D. RDX was only detected in

but mean concentrations were always less than 0.4

surface samples from grid A at sampling location

mg/kg for RDX and TNT, and less than 1.0

1-48, and the maximum RDX concentration was

mg/kg for the 4- and 2-AmDNTs (Table 3).

only 0.44 mg/kg; TNT, 2-Am-DNT and 4-Am-

In sampling area 1-48, explosives residues were

DNT were also occasionally detected in soils from

found consistently at very low concentration in

location 1-48, but all concentrations were below

grid A, just adjacent to the tank. Again HMX had

0.1 mg/kg.

the highest concentration, but here the maximum

Overall, these results confirm that the concen-

value detected was only 1.43 mg/kg (Table 4). Very

tration of explosives residues in soils at the inland

low concentrations of HMX were also detected in

firing ranges is related to the proximity of targets.

grid B, but HMX was not detected in any samples

In addition, it appears that the concentrations

13