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Annual Site Environmental Report for 1999
Table 3.2 Samples Collected During
WAG 8 by SWMU and Media
Subsurface Surface Ground-
Soil Water water
SWMU 82 28 3 1
SWMU83 24 3 3
SWMU 84 35 3 25
SWMU 85 30 3 19
C-340 38 N/A "N/A
PCBs exhibited concentrations that exceeded
500,000 mg/kg for some congeners.
Radiological constituents are distributed
throughout the site at a maximum activity of
2,890 pCi/g for 234Th and a maximum activity ;of
2,740 pCi/g for 238U. Aside from the radiological
constituents and metals, it is not understood what
processes may have taken place in the C-340
Building that would have resulted in the release
of the PAHs, PCBs, or dioxinlfurans. Subsurface
soil-contained 99'fc at an activity of 7.36 pCi/g
and metals at maximum concentrations equal to
or less than twice background levels. The
isolated occurrences of contaminants found in
the subsurface soil indicate that infiltration of
gr~undwater is not a significant contaminant
migration pathway at the C-340 Building.
• determine if the contaminant sources
are contributing to contamination already
known to exist in deep groundwater or
surface water,
• assess risks to human health and the
environment posed by this contamination
• determine if remedial actions are
required to reduce these risks, and
• support selection of an appropriate
remedial action.
The WAG 3 RI consisted of 3 SWMUs
within the PGDP.These sites were SWMU 4, the
C-747 Contaminated Burial Cell; SWMU 5, the
C-746-F Classified Burial Yard; and SWMU 6,
the C-747-B Burial Yard.
Table 3.3 lists the total number of samples
collected at each SWMU by media. Soil and
water samples were collected and analyzed for
VOCs, SVOAs, PCBs, metals, and radionuclides,
An on-site screening of alpha, beta, and ga.rrmla
activities was used to identify the samples thai
might require radioisotopic analysis in a fixedbase
laboratory.
The Site Evaluation Report for Waste Area
Grouping 8 at the Paducah Gaseous Diffusion
Plant, Paducah, Kentucky (DOE 2000c)
provides conclusions and additional information
on WAG 8 SE activities.
Soil sampling in SWMU 4 indicated
significant levels of PCBs at depths of
approximately 3 ft below ground surface (BGS),
TCE and various degradation products (including
vinyl chloride and cis-I, l-dichloroethene) in
WAG 3
In 1999; the WAG 3 RI was initiated with
90% of the work being completed at the year's
end. Tbeprimary focus of the WAG 3 ru was~ to
collect sufficient information about surface soil,
subsurface soil, and shallow groundwater to
accomplish the following:
• evaluate potential sources of
contamination,
Samples Collected During
WAG 3 by SWMU and Media
Table,3~3
Subsurface Ground-
Sediment Soil water
SWMU4 5 221 163
SWMU5 7 55 80
SWMU6 3 81 96
Environmental Program Information
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