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Fact Sheet

August 2012

Third Five-Year Review to Begin, Valley Park TCE Superfund Site, Valley Park, St. Louis County, Missouri


The Valley Park TCE Site (site) is located in the city of Valley Park, Missouri, which is in St. Louis County approximately 15 miles southwest of the city of St. Louis. Valley Park is located in the Meramec River Valley and consists primarily of residential, commercial and industrial buildings with a population of 6,942 (2010 Census). The site consists of two contaminant source areas and an area-wide ground water plume.


EPA will study site information during this third five-year review and inspect the site to determine if the remedy continues to protect human health and the environment. EPA encourages 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.


In 1982, the Missouri Department of Natural Resources (MDNR) detected volatile organic compounds (VOCs) including tetrachloroethene (PCE), trichloroethene (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.

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 as 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.

Operable Unit 2 (OU2) involves the cleanup of the soil and ground water at the Valley Technologies source area. Institutional controls will also be placed on the property.

The site was placed on the National Priorities List on June 10, 1986. Cleanup actions were defined in Records of Decision (RODs) 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:

1) Excavation of the most highly contaminated soils
2) Soil vapor extraction of soils contaminated at lower levels
3) 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. Wainwright settled their respective liabilities with EPA through a consent decree of past costs and all future oversight costs for OU1 and OU3. Valley Technologies proved inability to pay costs.


The site Administrative Record is available at the following locations during normal business hours:

EPA Records Center
901 N. Fifth St.
Kansas City, Kan.

Valley Park Public Library
320 Benton St.
Valley Park, Mo.

Questions or requests for information about the five-year review process can be submitted to:

Ben Washburn
Community Involvement Coordinator
EPA Region 7
901 N. Fifth St.
Kansas City, KS 66101
Phone: (913) 551-7364
Email: washburn.ben@epa.gov

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