EPA in Missouri

West Lake Landfill

Site Summary

The West Lake Landfill Superfund Site is located in Bridgeton, Mo. The site consists of several inactive landfills, including the West Lake Landfill and the Bridgeton Landfill. Originally used for agriculture, the land became a limestone quarrying and crushing operation in 1939. Beginning in the early 1950s, portions of the quarried areas and adjacent areas were used to dispose of municipal refuse, industrial solid wastes, and construction/demolition debris. In 1973, around 8,700 tons of leached barium sulfate from the Manhattan Project, a World War II nuclear bomb development program, was mixed with approximately 38,000 tons of soil and used to cover trash being dumped during daily operations.   

In 1990, the U.S. Environmental Protection Agency listed the site on the National Priorities List under the Comprehensive Environmental, Response, Compensation and Liability Act of 1980 (Superfund law). The Agency listed the entire 200-acre facility and has since designated multiple Operable Units at the site to manage various areas and environmental media. Operable Unit 1 (OU-1) contains radiologically-impacted material (RIM). Operable Unit 2 (OU-2) does not contain radiological material. Operable Unit 3 (OU-3) will address site-wide groundwater.

The adjacent Bridgeton Landfill, which is a part of OU-2, is part of the Superfund Site, but remains under the regulatory authority and oversight of the Missouri Department of Natural Resources.

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News and Updates

image of West Lake Sediment Sampling page mapAdditional Sediment Sampling Results(9/7/2016)

The U.S. Environmental Protection Agency (EPA) has released the results from the sediment sampling effort June 10, 2016, at the West Lake Landfill. The sediment sampling results did not indicate radiologically impacted material (RIM) at any location, with all results below the definition of RIM... more

image of West Lake SO2 news release - Aug. 31, 2016New Sulfur Dioxide Air Monitors Operational at Bridgeton Landfill(8/31/2016)

In April, EPA reached an agreement with Bridgeton Landfill, LLC, to install and operate two sulfur dioxide ambient air monitors near the Bridgeton Landfill. The agreement requires... more

Air monitoring data (see 9/1 item) Exit

image of West Lake Update, August 11, 2016Community Dialogue Meeting Preview (PDF)(1 pg, 710 K, 8/11/2016)

In March of this year, EPA began hosting a series of Community Dialogue meetings in Bridgeton to discuss the remedial options being developed for the West Lake Landfill. The most recent meeting focused on the 2008 Record of Decision and the “cap in place” remedy. The next meeting on August 15... more

image of West Lake letter providing status overview of site remedy evaluation, August 4, 2016EPA Letter Providing Overview of Status of Development to Support EPA's Evaluation of Site Remedy Decision (PDF)(5 pp, 377 K, 8/4/2016)

The U.S. Environmental Protection Agency is providing this letter to provide an overview of the status of various studies' work plans... more

West Lake Update Thumbnail - July 13, 2016Pyrolysis Testing Results Indicate Heating Did Not Increase Radon (PDF)(2 pp, 184 K, 7/13/2016)

EPA Region 7 released results today from laboratory tests that indicate heating radiologically impacted material (RIM)... more

West Lake Landfill - Radon Emanation Coefficient StudyRadon Emanation Coefficient Study (PDF)(2,110 pp, 49.8 MB, 7/13/2016)

Tetra Tech, Inc. is submitting electronically the analytical laboratory report with associated data validation report regarding a study... more

The Contamination

Soil Sample Thumbnail 2

Community Health

Community Health Thumbnail

Going Forward

image of updated 2016 timeline, May 24, 2016

Site Map

West Lake Landfill Map - 2016