Valley Park TCE (Trichloroethylene)
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In 1982, the State detected Volatile Organic Compounds (VOCs) in samples collected from three Valley Park municipal wells. In response to the contamination, the City of Valley Park eventually closed the municipal well system and connected to the county water system. EPA and the State determined that the sources of contamination originated from a former Wainwright Industries property and the current Valley Technologies, Inc. property located in Valley Park. Both companies operated metal fabrication processes which involved the use of chlorinated degreasers and solvents for cleaning purposes. Contamination located at the Wainwright property has been addressed in Operable Unit 1 (OU1) and OU3. Contamination located at the Valley Technologies property will be addressed as OU2. The drinking water supply for the city of Kirkwood is located approximately 2 miles directly downgradient.
Current Site Status and Cleanup Actions to Date
- The City of Valley Park began treating its public drinking water with an aerator after contamination was discovered in 1982. Treatment was later upgraded to an air stripper (PDF) (529 K, 2 pp) tower, which succeeded in achieving acceptable contaminant levels. However, due to public concern, the City connected to the St. Louis County water supply in 1988.
- The Site was placed on the NPL in 1986.
- In 1990, approximately 330 cubic yards of contaminated soils were removed at OU1 by the responsible party. Subsequently, the responsible party conducted a Remedial Investigation (RI) which resulted in the 1994 Record of Decision (ROD) for OU1 and OU3. The remedial actions for OU1 and OU3 were implemented by the responsible party beginning in 1996, and included excavation (PDF) (530 K, 2 pp) and disposal of 600 cubic yards of contaminated soil, installation of a soil vapor extraction (PDF) (80 K, 2 pp) system, and installation of a groundwater extraction and treatment (PDF) (526 K, 2 pp) system.
- The State conducted the RI of OU2, which resulted in a ROD in 2001. EPA completed the remedial design (RD) in 2005. The design identified several changes to the ROD, which were defined in an Explanation of Significant Differences (ESD) document. The remedial action will involve excavation and disposal of 5,000 cubic yards of contaminated soil, and installation of soil vapor extraction and groundwater extraction and treatment systems.
Current Funding Status
- The State negotiated a settlement with one responsible party to fund and implement the remedial actions at OU1 and OU3.
- EPA recovered $500,000 in past costs from one responsible party. The money has been placed in a site-specific account to be used to pay for future expenditures at OU2 of this site.
- In September 2005, EPA provided $2.5 million to fund the OU2 remedial action. The construction work is scheduled to start in November and be complete in July 2006.
For more information on the projects at this site, please read the Valley Park TCE Site Fact Sheet on the Region 7 Superfund Web site.
- In September 2005, EPA provided $2.5 million to fund the OU2 remedial action. The construction work is scheduled to start in November.
- The responsible party for OU1 and OU3 has constructed and currently operates the soil and groundwater remediation systems. Groundwater contamination levels have decreased significantly within the first two years of operation.
- In 2005, EPA completed the remedial design (RD) for OU2.