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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 revised draft FFS - 1-10-18Revised Draft Final Feasibility Study, West Lake Landfill Operable Unit 1 (revised 1/10/2018) (PDF)(814 pp, 47.6 MB, 1/10/2018) Appendices (PDF)(1,630 pp, 145 MB, 1/10/2018)

This Final Feasibility Study (FFS) for Operable Unit-1 (OU-1) of the West Lake Landfill (the Site) was prepared at the direction of the U.S. Environmental Protection Agency (EPA) to present further evaluation of potential remedial alternatives to address the presence of radiologically impacted materials (RIM) contained within portions of some of the landfill units at the Site. This FFS was prepared in accordance with the requirements of the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), the National Oil and Hazardous Substances Pollution Contingency Plan (NCP), relevant EPA guidance documents (including, but not limited to, EPA’s 1988 Guidance for Conducting Remedial Investigations and Feasibility Studies under CERCLA)... more

image of Revised draft final feasibility study 8-25-17Revised Draft Final Feasibility Study, West Lake Landfill Operable Unit 1 (PDF)(702 pp, 43.9 MB, 8/25/2017) Appendices (PDF)(3,392 pp, 121 MB, 8/25/2017)

This Final Feasibility Study (FFS) for Operable Unit-1 (OU-1) of the West Lake Landfill (the Site) was prepared at the direction of the U.S. Environmental Protection Agency (EPA) to present further evaluation of potential remedial alternatives to address the presence of radiologically impacted materials (RIM) contained within portions of some of the landfill units at the Site. This FFS was prepared in accordance with the requirements of... more

EPA Comment Letter Regarding Review of Revised Draft Final Feasibility Study (PDF)(62 pp, 4.98 MB, 10/6/2017)

image of WL revised draft RIA thumbnail 11-28-17Revised Draft Remedial Investigation Addendum (RIA) Report, West Lake Landfill Operable Unit 1 (revised 11/28/2017) (PDF)(642 pp, 61 MB, 11/28/2017) Appendices (PDF)(7,245 pp, 676 MB, 11/28/2017)

This revised draft Remedial Investigation Addendum (RIA) has been prepared for Operable Unit-1 (OU-1) of the West Lake Landfill Superfund Site (Site). It is being submitted in accordance with the EPA’s December 9, 2015 Statement of Work for Remedial Investigation/Final Feasibility Study, as further set forth in the approved Abbreviated Work Plan for Remedial Investigation Addendum and Final Feasibility Study for West Lake Landfill Operable Unit-1 (OU-1), dated May 6, 2016 (final revision). This revised draft RI Addendum also addresses comments received from EPA on August 25, 2017 to the revised draft RI Addendum submitted to EPA on June 16, 2017. more

image of revised draft Remedial Investigation Addendum 6-16-17Revised Draft Remedial Investigation Addendum (RIA) Report, West Lake Landfill Operable Unit 1(6/16/2017)

This revised draft RI Addendum is being submitted in accordance with the EPA’s Dec. 9, 2015 Statement of Work for Remedial Investigation/Final Feasibility Study, as further set forth in the approved Abbreviated Work Plan for Remedial Investigation Addendum and Final Feasibility Study for West Lake Landfill Operable Unit 1, dated May 6, 2016 (final revision). This revised draft RI Addendum also addresses comments received from EPA... more

EPA Comment Letter Regarding Review of Revised Draft RIA Report (PDF)(39 pp, 2.93 MB, 8/25/2017)

image of WL site background & current conditions 12-26-17Site Background and Current Conditions, West Lake Landfill Operable Unit 1 (PDF)(14 pp, 1.57 MB, 12/26/2017)

General Site Location and Description - The West Lake Landfill Superfund Site is a 200-acre, inactive solid waste disposal facility located in Bridgeton, Missouri. The Site lies approximately 18 miles northwest of downtown St. Louis within 2 miles of the St. Louis Lambert International Airport. The present channel of the Missouri River is located approximately 2 miles to the west of the Site, which is situated on the eastern boundary of the river’s alluvial floodplain. Industrial properties exist both on and adjacent to the Site, and other commercial and residential areas almost completely surround its perimeter. The Site is composed of three operable units. Operable Unit 1 (OU-1) consists of areas at the Site where radiologically impacted material (RIM) has been identified within surface soil and subsurface solid waste. more

image of WL actions summary to address 2012 NRRB cmts 12-26-17Summary of Actions to Address 2/29/2012 NRRB Consultation Comments, West Lake Landfill Operable Unit 1 (PDF)(22 pp, 664 K, 12/26/2017)

Purpose - The National Remedy Review (NRRB) conducted a consultation for the West Lake Landfill Superfund Site (Site) Operable Unit 1 (OU-1) on February 29, 2012. This NRRB review was performed because the anticipated costs of the remedial alternatives evaluated in the 2011 Supplemental Feasibility Study (SFS) were greater than $25 million. The NRRB provided Region 7 with its consultation comments in the final draft memorandum dated February 28, 2013 (attached). That consultation and subsequent additional feedback from NRRB members and EPA headquarters resulted in Region 7 directing the West Lake potentially responsible parties (PRPs) to perform several additional investigations and studies at the Site. Below is a summary of the Site, site actions, new investigations, and related findings that were... more

image of WL presentation - RIM extent & distribution - Dec 2017West Lake Landfill Superfund Site - Extent and Distribution of Radiologically Impacted Materials (RIM) (PDF)(33 pp, 5.12 MB, December 2017)

This presentation covers topics including: West Lake Landfill Site Vicinity, Site Location, Operations, Operable Units, Origin of Waste Radiological Materials, Landfill Operations, Landfill Cell Configuration, Landfill Settlement, Occurrences of RIM, Definition of RIM, Basis of RIM Definition, RIM Characterization, and Summary Data

image of West Lake Update 10-16-17West Lake Update: West Lake Landfill Community Listening Session to Be Jointly Hosted by EPA, Community Advisory Group, and Just Moms STL; EPA Publishes Remedial Investigation Addendum and Final Feasibility Study Draft Documents (PDF)(2 pp, 942 K, 10/16/2017)

EPA Region 7, in collaboration with the Community Advisory Group (CAG) and Just Moms STL, will jointly host a Community Listening Session on October 19 at the District 9 Machinists Hall in Bridgeton, Mo. Senior Advisor to EPA Administrator Scott Pruitt, Albert “Kell” Kelly, and new Acting Regional Administrator Cathy Stepp will attend the Listening Session to hear site-related concerns directly from local citizens. Community members who wish to provide their testimonials during the meeting must register, in advance or on-site, and may do so... more

image of West Lake Draft SW monitoring plan - 9-6-17Draft Stormwater Monitoring Plan, West Lake Landfill Operable Unit 1 (PDF)(9 pp, 3.52 MB, 9/6/2017)

On behalf of Cotter Corporation (N.S.L.), Bridgeton Landfill, LLC, Rock Road Industries, Inc. (collectively, the OU-1 Respondents) and the United States Department of Energy (the Federal Respondent), Engineering Management Support Inc. (EMSI) submits this draft Stormwater Monitoring Plan (the Plan), which describes stormwater sampling and analysis at Operable Unit-1 (OU-1) of the West Lake Landfill. Per EPA’s letter of December 12, 2016, this Plan addresses... more

EPA Comment Letter Regarding Review of Draft Stormwater Monitoring Plan (PDF)(42 pp, 2.99 MB, 10/3/2017)

image of Draft final feasibility study 1-4-17Draft Final Feasibility Study, West Lake Landfill Operable Unit 1(1/4/2017)

This Final Feasibility Study (FFS) for Operable Unit 1 (OU-1) of the West Lake Landfill (the Site) was prepared at the direction of EPA to present further evaluations of potential remedial alternatives to address the presence of radiologically impacted materials (RIM) contained within portions of some of the landfill units at the Site. This FFS was prepared in accordance with the requirements of the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA)... more

EPA Comment Letter Regarding Review of Draft Final Feasibility Study (PDF)(52 pp, 3.02 MB, 6/23/2017)

Response to EPA Comment Letter Regarding Review of Draft Final Feasibility Study (PDF)(56 pp, 1.1 MB, 9/1/2017)

image of Draft RIA Report 7-29-16Draft Remedial Investigation Addendum (RIA) Report, West Lake Landfill Operable Unit 1(7/29/2016)

This RI Addendum (RIA) addresses the requirements established by EPA in the Dec. 9, 2015 Statement of Work for Remedial Investigation/Final Feasibility Study, and as further set forth in the approved Abbreviated Work Plan for Remedial Investigation Addendum and Final Feasibility Study for West Lake Landfill Operable Unit 1, dated May 6, 2016 ... more

EPA Comment Letter Regarding Review of Draft RIA Report (PDF)(42 pp, 2.46 MB, 3/14/2017)

EPA Comment Letter Regarding Review of Supporting Documentation for Draft RIA Report (PDF)(44 pp, 2.72 MB, 4/25/2017)

Response to EPA Comment Letter Regarding Review of Draft RIA Report (PDF)(78 pp, 1.14 MB, 8/13/2017)