I. EXECUTIVE SUMMARY
5
surface sediment for white phosphorus analysis. We collected five com-
posites, all of which were positive with white phosphorus concentrations
ranging from 0.023 to 6.90 g/g. We also collected eight discrete samples,
two of which were blank, and the remaining six ranged from 0.00014 to 6.38
g/g. This pond needs further remediation.
III-3. COMPOSITE SAMPLING AND ANALYSIS FOR
WHITE PHOSPHORUS IN UNTREATED PONDS
Marianne E. Walsh, Charles M. Collins, and Ronald N. Bailey
Mortality of telemetry mallards indicates that localized areas of contami-
nation (hotspots) may still be present in Northern C, Area C/D, and possi-
bly Area A. In 2000, we continued to collect composite samples from Areas
A and C/D where previous sampling was sparse or non-existent. We also
sampled some small open water pools within the marsh of Area C and the
northern part of Pond 146, which is undrained. All of the new samples in
Areas A and C/D were blank. In Area C, one composite sample from the
marsh was positive; white phosphorus concentration was 0.03 g/g. This
concentration is high enough to be of concern.
III-4. 2000 WEATHER DATA FOR EAGLE RIVER FLATS
Charles M. Collins
May and June are normally the driest months of the core drying season
needed for treating contaminated pond bottom sediments. This year the
timing of the last spring flooding tide in early May allowed us to deploy
equipment and pump the ponds out so that we could take advantage of the
warmer temperatures of late May to start the drying process. June and early
July provided nearly ideal drying conditions except for an occasional rain-
storm.
The summer of 2000 had normal to slightly above-normal temperatures
for May and June. There were thirty-eight days from mid-May to mid-Au-
gust 2000 with maximum temperatures of 20C or more. This compares to
only thirty days during the summer of 1999 and only eighteen days during
the summer of 1998. Temperatures were below normal for August and Sep-
tember.
Precipitation was minimal from late May through almost all of June, with
a precipitation total from 24 May through 28 June of only 8 mm. Thirteen of
the days with maximum temperatures of 20C or more also occurred in this
dry spell, contributing to the excellent sediment drying conditions during
this period.
III-5. EAGLE RIVER FLATS WIRELESS REMOTE IMAGING SYSTEM
Christopher R. Williams and Gary M.Trachier
A remote imaging system proved to be useful for monitoring the daily
operations of the Pond Pumping Remediation Project at Eagle River Flats.
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