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.

News and Updates

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Image of record foldersEPA Region 7 announces the availability of the Administrative Record for the Administrative Settlement Agreement and Order on Consent for Removal Actions... 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) from the West Lake Landfill did not increase radon production. In the case of wet or saturated RIM, heating the material actually... more
ALSO:  Additional Sulfur Dioxide (SO2) Monitors at the Bridgeton Landfill and Site Progress Updates

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

The data were qualified according to the U.S. Environmental Protection Agency (EPA) Region 7 documents entitled "Contract Laboratory Program National Functional Guidelines for Inorganic Superfund Data Review" (9355.0-131), August 2014... more

West lake landfill - comprehensive sampling plan for monitoring sulfur dioxide in ambient air - thumbnailComprehensive Sampling Plan for Monitoring Sulfur Dioxide in Ambient Air (PDF)(37 pp, 103.4 MB, 7/7/2016)

Stantec Consulting Services, Inc. (Stantec) has prepared this comprehensive sampling plan (CSP) to install and operate ambient air monitors for sulfur dioxide (SO2) on behalf of... more

image of West Lake Update, June 28, 2016EPA Releases On-Site Air Monitoring Reports (PDF)(1 pg, 698 K, 6/28/2016)

On April 14, 2014, EPA and the Responsible Parties signed the Administrative Settlement and Order on Consent for Removal Action-Preconstruction Work, which in part required... more

image of West Lake air monitoring quarter report - June 2016Perimeter Air Monitoring Quarter Reports

May-July 2015 (PDF)(178 pp, 10.7 MB)
Aug-Oct 2015 (PDF)(184 pp, 5.6 MB)
Nov 2015-Jan 2016 (PDF)(228 pp, 14.6 MB)

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