on the aluminum value, a low order detonation of an item containing tritonal may
have occurred in that puddle. The metal concentrations were very high but
considering the limited amount of water in the puddle, this represents a small impact
to the range.
4.2 Bravo Range
The Bravo Range is also located in front of Primerose Lake and is composed mainly
of sandy soil with little vegetation. The range was freshly tilled when we arrived on
site and many concrete bombs were lying on the ground close to the target (Figs. 17,
18). Since the vegetation was very scarce and the site looked very clean, vegetation
was sampled 70 meters in front of the target (two samples, one right, B-Br-T-Front
right and one left of the target, B-Br-T-Front left). Background vegetation and soil
samples (3 vegetation + 3 duplicates, 1 soil and 1 duplicate) were also collected. No
energetic materials were analysed in this range. No surface water samples were
collected in Bravo Range.
Vegetation
Some parameters exceeded the background level value and are in blue in Table III. Of
the 27 parameters analysed, only Cr, Fe, Pb, Na, Sr, Ti, V and Zn were detected at
values higher than the BGL, but concentrations were of the same order of magnitude
as in Phase I indicating limited or no accumulation. Some analytes identified as a
problem during Phase I, Al, Ba, Cd and Cu were not a problem during Phase II. It is
probably because the soil was moved during the cleaning of the sites and this
decreases the concentrations by mixing with cleaner deeper soil. Nevertheless, as in
Phase I, it is concluded that this site is not contaminated.
4.3 Jimmy Lake Range
In Jimmy Lake Range, the bombing circle and the 20-mm strafing areas were sampled
as illustrated in Figures 2 to 5. The practice target was used for concentric circular
sampling (Fig. 5) and the linear sampling strategy was used for the 20-mm firing
range. For the bombing circle, 30 soil samples including 4 duplicates were collected
in the circular sampling, while one vegetation sample, B-JL-BC, was collected. Two
vegetation samples, B-JL-BC-1 and B-JL-BC-2, were collected and used as
background samples. For the strafing areas, composite soil samples were collected in
transects that were split into A and B sections (Fig 2). Transects were perpendicular
to the direction of flight (West to East) and were placed at 20, 40, 60, 80, 100, 120,
140 and 160 % of a 120-m range, the 40 % transect being at the target locations (Figs.
2, 3). This strategy was used to detect any progression of the metal concentrations
from behind to the front of the targets. In the strafing area, 14 soil samples including 2
duplicates were collected between 0 and 100 %. In addition, 15 samples of vegetation
including 3 duplicates were taken at each transect except at 80 and 100% where no
vegetation was present. The soil samples collected in this range were comprised of
fine-grained sand. The Jimmy Lake Range is located between Jimmy Lake and
Primerose Lake. A total of 44 soil samples and 18 vegetation samples were collected
in this range. Energetic analyses were performed only on samples collected in the
circular strategy, since the strafing area is not supposed to contain energetics.
14
DRDC Valcartier TR 2004-204
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