III-3. COMPOSITE SAMPLING AND ANALYSIS
69
the maximum possible concentration in a
CONCLUSIONS
subsample would be 1.4 g/g. Previously
we have observed that sediment samples
Our 2000 sampling results did not reveal
with white phosphorus concentrations above
any reservoirs of white phosphorus in Areas
1 g/g frequently contain macroscopic white
A or C/D. The marsh of Northern C, which
phosphorus particles, the form lethal to
was never sampled intensively because of a
waterfowl.
dearth of open water habitat, may be the
We did not sample further in Northern C
source of the continued poisonings of telem-
because we were concentrating our efforts in
etry birds.
Area C/D. Since we did not detect any white
phosphorus in Area C/D, next year we will
focus on the marsh in Northern C (Fig. III-3-
REFERENCE
7), even though open water habitat makes up
a relatively small part of the marsh. However,
Racine, C.H., M.E. Walsh, C.M. Collins, D.
the dynamic nature of the pond borders im-
Lawson, K. Henry, L. Reitsma, B. Steele,
plies that we now must expand our compos-
R . Harris, and S.T. Bird (1993) White
ite sampling beyond open water ponds. Al-
phosphorus contamination of salt marsh
though there are no large ponds, there are a
sediments at Eagle River Flats, Alaska. CRREL
number of very small open water pools within
Contract Report to the US Army Environ-
the sedge marsh. These very small pools are
mental Center, Aberdeen Proving Ground,
used to some degree by dabbling ducks, es-
M D , AEC Report No. ENAEC-IR-CR-
pecially mallards.
93063.
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