Tennessee Department of Environment and Conservation - DOE Oversight Division. Status Report to the Public - December 1999 Page: 22 of 72

Creek Watershed - Bethel Valley. The City of Oak Ridge is located north of the
Bear Creek Valley Watershed, as is Pine Ridge. The Upper East Fork Poplar
Creek Watershed borders the Bear Creek Valley Watershed on the east.
Shallow groundwater in the eastern end of Bear Creek Valley is contaminated
with uranium and chlorinated solvents, also known as
dense non-aqueous phase liquids (DNAPLs). Deep
Shallow groundwater in the groundwater is also contaminated with DNAPLs, which
eastern end of Bear Creek tend to sink through groundwater and fractured or
Valley is contaminated with porous rocks. A portion of these contaminants dissolves
uranium and chlorinated into the groundwater and escapes into the stream that
solvents. runs through the valley.
Other contaminants that have migrated into surface
water include nitrates and uranium from the S-3 Ponds
Area, uranium and VOCs from the Oil Landfarm Area, and VOCs from the Bear
Creek Burial Grounds.
The major sites in Bear Creek Valley are:
/ S-3 Ponds: Used from the 1950s through the 1980s for disposal
of more than 2 million gallons of nitric acid solutions each year,
they are now closed under the Resource Conservation and
Recovery Act (RCRA).
/ Oil Landfarm Area: Used to dispose of organic wastes, contami-
nated waste oils, and coolants, it has been partially remediated.
/ Sanitary Landfill 1: Used between 1968 and 1982 for the disposal
of non-contaminated materials, it was closed in 1983 and capped
according to TDEC requirements.
/ Boneyard/Burnyard: A series of unlined trenches used for the dis-
posal of contaminated debris and wastes and for the burning of
magnesium chips and wood, in operation from 1943 until 1970;
only the Hazardous Chemicals Disposal Area portion of the site
has been capped.
/ Bear Creek Burial Grounds: Used from 1955 to 1991 as the main
solid waste disposal area for the Y-12 Plant and for disposal of
industrial wastes from ORNL, ETTP, and areas out side the ORR.
Here the "Walk-in Pits" were used for the disposal of shock-sensi-
tive and pyrophoric materials. The Walk-in Pits and other parts of
the burial grounds have been closed under RCRA. The burial
Grounds are estimated to contain approximately 40 million
pounds of Uranium metal and hydroxides (primarily U-238) that
have been buried in unlined pits and trenches.

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Tennessee Department of Environment and Conservation - DOE Oversight Division. Status Report to the Public - December 1999, report, December 1, 1999; United States. (https://digital.library.unt.edu/ark:/67531/metadc724924/m1/22/ocr/: accessed May 27, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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