pulse propagation. USA Cold Regions Research
identified are absent in the 1995 data. This means
and Engineering Laboratory, MP 1951.
that all foreign material has most likely been
removed. The lack of significant EMI anomalies
Environmental Science and Engineering, Inc.
(1991) Poleline Road Disposal Area remedial
corroborates this conclusion.
investigation, Fort Richardson, Alaska. Seattle,
The 1995 investigations east of the baseline
Washington.
further define the depth to and extent of the
anomalous areas T-1 and T-2. Both areas contain
Lawson, D.E., J.C. Strasser, S.A. Arcone, A.J.
high-amplitude EMI anomalies that we interpret
ground-penetrating radar and electromagnetic in-
to be significant concentrations of metallic debris.
duction surveys of the Poleline Road site, Fort
In addition, the EMI survey indicates scattered,
Richardson, Alaska. Contract Report to U.S. Army
small, near-surface objects across the entire site.
Engineer District, Alaska.
The GPR profiles tell us that targets lie approxi-
Morey, R.E. (1974) Continuous subsurface profil-
mately 1.5 to 3.0 m below the surface and that
ing by impulse radar. In Proceedings of Engineering
some of these targets are presumably large (e.g.,
Foundation Conference on Subsurface Exploration for
the size of a 55-gal. drum). A broad GPR horizon,
Underground Excavation and Heavy Construction.
present on most profiles, may represent a former
ground surface, buried after debris disposal. This
American Society of Civil Engineers, New York,
pp. 213232.
surface may have been the floor of broad pits
OHM Remediation Services Corp. (1995) Exca-
within which metallic materials were concen-
vation of the Poleline Road Disposal Area, Fort
trated. Alternatively, this surface may have been
Richardson Army installation Anchorage, Alaska.
the natural ground surface onto which material
Phase I, II and III Final Report. Pleasanton, Cali-
was dumped and covered. An intense and con-
fornia.
tinuous GPR horizon in the T-1 area suggests
Schmoll, H.R., and E. Dobrovolny (1972) Gener-
trench burial techniques. There are no current
alized geologic map of Anchorage and vicinity,
plans for further removal of this buried debris
Alaska. U.S. Geological Survey, Washington, D.C.,
from PRDA.
Map I-787-A.
Strasser, J.C., A.J. Delaney, D.E. Lawson, and
S.A. Arcone (1995) Geophysical investigations of
LITERATURE CITED
the Poleline Road Disposal Area, Fort Richardson,
Arcone, S.A., and A.J. Delaney (1985) Dielectric
Alaska. Contract Report to U.S. Army Engineer
studies of permafrost using cross-borehole VHF
District, Alaska.
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