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Weldon Spring Site Remedial Action Project
St. Charles County, Missouri
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Office: Oak Ridge Operations Office
Size:
226 acres (0.4 square mile)
NPL Status:
Quarry placed on the NPL on July 22, 1987 and Chemical Plant and Raffinate Pits
placed on the NPL on March 13, 1989.
Mission:
The Weldon Spring Site was developed by the U.S. Army for explosives production
during World War II, and was operated by the Atomic Energy Commission from 1955
to 1966 as a uranium processing plant.
Overview of Environmental Conditions:
Soil, surface water, groundwater, and building rubble contamination resulting
from the handling and disposal of uranium ore concentrates and scrap.
CERCLA/RCRA Remediation Funding in FY 95: $41,403,000
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Progress in Reaching Interagency Agreement
DOE and EPA Region VII entered into an FFA, signed on August 12, 1986. An
amended FFA was signed on June 30, 1992.
Specific Cost Estimates and Budgetary Proposals Involved in Each Interagency
Agreement
Funds budgeted for environmental restoration under the FFA at the site total
$58.5 million of appropriated funding for FY 96 and $67.5 million for FY 97
according to the request in the President's Budget.
Public Comments Regarding Interagency Agreements
The public comment period for the FFA began on March 22, 1992 and remained open
for 45 days. No comments were received during this period.
Progress in Conducting Remedial Investigations/Feasibility Studies
Initial work was started under a CERCLA/NEPA FFCA executed in 1986.
Subsequently, the site was placed on the NPL in July 1987. The Weldon Spring
Site project issued a work plan in August 1988 which presented the overall
strategy for accomplishing remedial actions. That strategy included the
development of an umbrella RI/FS for the Chemical Plant Area, an RI/FS for
Quarry bulk wastes, an RI/FS for Quarry residuals, and several interim response
actions. A need was subsequently identified to specifically address groundwater
at the Chemical Plant Area through an additional RI/FS.
Major accomplishments in FY 95 include:
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Completed the joint RA Work Plan for the Site Groundwater Operable Unit with
the Department of the Army in May 1995.
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Completed the Site Groundwater Sampling Plan in August 1995.
Progress in Conducting Remedial Actions
Remedial actions accomplished during FY 95 include:
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Completed construction and initiated testing of the Pilot Sludge Processing
Facility in December 1994.
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Completed acquisition of 2 million cubic yards of soil in the Soil Borrow Area
from the State of Missouri in July 1995. This Area will be utilized during
disposal facility construction.
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Demolished the last 4 buildings in the demolition packages in December 1994. To
date, 43 of the 44 buildings have been demolished.
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As of September 1995, treated a total of 100 million gallons of water at the
Quarry Water Treatment Plant and Site Water Treatment Plant.
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Completed excavation of 72,883 cubic yards in the Quarry bulk waste removal
effort in September 1995, for a cumulative excavated volume of 116,000 cubic
yards (approximately 96 percent of the total anticipated volume).
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Expect to complete construction of the Site Water Treatment Plant-Train 2
facilities in October1995.
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