launching area (Figures 2 and 3). At 15 m from the launch site, soil samples were
collected at 6.2, 7.4, 8.8, 10.1, and 11.3 m from a reference wall that separated
Range 2 from Range 3. At 20 m, samples were collected at 6.2, 7.8, 9.1, and
10.2 m from the reference wall in a similar manner. Also at 20 m, a set of seven
surface samples was collected in a wheel pattern at 11.5 m from the wall. At
25 m, samples were collected at 6.3, 7.7, 8.6, 10.0,11.2, 12.0, and 13.4 m from
the reference wall. At each sampling location a surface sample (0 to 1.0 cm) and
a discrete depth sample (at 10 cm) were collected, except for the samples col-
lected in the wheel pattern, where only surface samples were collected. All soil
samples were collected using stainless steel trowels, which were carefully wiped
with a clean paper towel, washed with acetone, and air dried between samples.
Figure 3. Launching area of hand grenade range at Fort Lewis
A deep (approximately 93-cm
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