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Fact Sheet
April 2008
Second Five-Year Review to Begin, Valley Park TCE Site, Valley Park, St. Louis County, Missouri
INTRODUCTION
The U.S. Environmental Protection Agency (EPA) and the Missouri Department of Natural Resources (MDNR) conduct regular reviews on Superfund sites where cleanups have been completed. These reviews are required by the Superfund law [42 U.S.C. Section 9621(c)]. The Agencies have started the second five-year review of the Valley Park TCE Superfund site in Valley Park, St. Louis County, Missouri.
Background
The Valley Park TCE site is located within Valley Park, Missouri and unincorporated areas to the east of the city. The site consists of soil and ground water contaminated by chlorinated solvents within the Meramec River alluvial aquifer.
In 1982, MDNR detected volatile organic compounds (VOCs) including tetrachloroethene (PCE), trichloro-ethene (TCE) and 1,1,1-trichloroethane (TCA) in samples collected from three Valley Park municipal wells. In response to the contamination, the city of Valley Park installed equipment to remove VOCs from drinking water. Since 1988, Valley Park residents have been connected to the St. Louis County public water system. Therefore, Valley Park residents are no longer using contaminated water for domestic purposes.
EPA and MDNR determined that the sources of contamination originated from a former Wainwright Industries property and a current Valley Technologies, Inc. property located in Valley Park. Wainwright and Valley Technologies both used chlorinated degreasers and solvents for cleaning purposes.
The site has been managed according to the two, separate source areas.
Operable Units 1 and 3 (OU1 and OU3) are the ground water and soil cleanups at the former Wainwright source area, respectively.
Operable Unit 2 (OU2) involves the cleanup of the soil and ground water at the Valley Technologies source area.
The site was placed on the National Priorities List on June 10, 1986. Cleanup actions were defined in Records of Decision (ROD) for OU1and OU3 in 1994 and for OU2 in 2001. Both RODs were modified as defined in 1996 and 2005 Explanation of Significant Difference documents. The remedies for both source areas included:
- Excavation of the most highly contaminated soils.
- Soil vapor extraction of soils contaminated at lower levels.
- Extraction and treatment of contaminated ground water.
The remedial actions for both RODs have been constructed and implemented. The operation and maintenance of the systems are ongoing.
Wainwright Industries is conducting the cleanup action at their former property following a consent decree with MDNR. EPA is conducting the cleanup action at the Valley Technologies property. Both Wainwright and Valley Technologies have settled their respective liabilities with EPA.
The first Five-Year Review report was completed in September of 2003.
The Five-Year Review
The Agencies will study the site information during this second five-year review and inspect the site to determine if the remedy continues to protect human health and the environment. The Agencies encourage members of the community to ask questions and report any concerns about the site.
A final report will be prepared at the end of the review and will be available at the site information repositories.
Additional Information
The site Administrative Record is available during normal business hours:
Valley Park Public Library
320 Benton St.
Valley Park, Mo.
EPA Records Center
901 N. Fifth St.
Kansas City, Kan.
Questions or requests for information can be submitted to:
Fritz Hirter
Community Involvement Coordinator
EPA Region 7
901 N. Fifth St.
Kansas City, KS 66101
Toll free: (800) 223-0425
e-mail: hirter.fritz@epa.gov
