West Lake Landfill
Last updated Sept. 15, 2017
The West Lake Landfill site is on a parcel of approximately 200 acres in Bridgeton, Missouri. The site consists of the Bridgeton Sanitary Landfill, which stopped receiving waste on Dec. 31, 2004, and several old inactive areas with municipal solid waste and demolition debris. The site is divided into two operable units, or OUs. OU-1 consists of radiological areas and OU-2 consists of the other landfill areas (including Bridgeton Sanitary Landfill), which did not receive any radiologically contaminated soil. In 1990, West Lake Landfill was listed on the National Priorities List making it a Superfund site. In May 2008 a record of decision was signed for OU-1, which describes the selected remedy to contain the radiological contamination using a modified solid waste landfill cover. EPA is the lead agency for this site.
As a result of internal deliberations by EPA and its further consideration of certain comments provided by interested community members, EPA determined a supplemental feasibility study is warranted. By letter dated Jan. 11, 2010, and pursuant to the administrative order on consent, EPA requested the respondents (also known as responsible parties) perform the study. The study compares the record of decision selected remedy against two “complete rad removal” alternatives: excavation of radioactive materials with off-site commercial disposal of the excavated materials and excavation of radioactive materials with on-site disposal in an engineered disposal cell with a liner and cap. The supplemental feasibility study was finalized by EPA on Dec. 28, 2011. The study will be added to the administrative record for this site.
The estimated costs defined for each alternative in the supplemental reasibility study report exceeded the threshold which triggered an early consultation with EPA's National Remedy Review Board (NRRB).
EPA may propose a modification to the remedy selected in the 2008 record of decision for the site, based on the information provided in the supplemental feasibility study. If EPA proposes any changes to the record of decision, EPA will hold a public meeting to answer questions and take public comments on the proposed decision. A public announcement will be sent prior to that meeting. EPA will make a final decision at the close of the public comment period.
Storm Water Sampling
During the historic rain event that occurred in the St. Louis area in late April and early May, the department responded to stormwater overflow concerns near the Bridgeton Sanitary and West Lake landfills by assessing the situation and collecting a stormwater sample for analyses. The turbid sample was sent to the Missouri Department of Natural Resources' contract laboratory and analyzed for gross alpha, gross beta, isotopic Uranium, Radium-226 and Radium-228. View the June 2017 report. Additional analysis was performed for Isotopic Thorium and the June 2017 report was updated. View the August 2017 report.Following the historic rainfall that occurred in the St. Louis area, the department responded to concerns of excess surface water flowing along the northeastern boundary of the West Lake Landfill by assessing the situation and collecting a storm water sample on December 28, 2015 for analyses. The sample was sent to the department’s contract laboratory and analyzed for gross alpha, gross beta, isotopic Uranium, Radium-226 and Radium-228. View the report.
West Lake Landfill Radiological Surveys
On May 16, 2013, staff visited the West Lake Landfill and Bridgeton Sanitary Landfill sites to conduct a radiological survey. The purpose of the survey was to collect radiological readings upwind and downwind from the site using odor as an indication of downwind direction. The upwind and downwind readings were compared for differences in radiological readings. Ambient radiation readings were collected to the south, southwest, east, and northeast of the sites using several types of equipment. In addition, deposition dust samples were collected to measure radiological activity in the predominant wind direction and in the downwind location at the time of sampling. All readings and sample results were consistent with background levels.
Jan. 25, 2016 -- The department released a West Lake Interim Vicinity Report - Radiological Survey and Sampling - Nov. 4-6, 2015. Also, the Department of Health and Senior Services released a Bridgeton/West Lake Interim Report for radiological sampling conducted during the same period. See the interim reports below.
- Department of Natural Resources -- West Lake Interim Vicinity Report - Radiological Survey and Sampling - Nov. 4-6, 2015
- Department of Health and Senior Services -- Bridgeton/West Lake Interim Vicinity Report - Radiological Sampling - Nov. 4-6, 2015
April 1, 2016 -- The department released the West Lake Landfill Final Vicinity Report - Radiological Survey and Sampling - Nov. 4-6, 2015. This final report supplements the department's West Lake Landfill Interim Vicinity Report that was released January 25, 2016. See the final report below.
- Department of Natural Resources -- West Lake Landfill Final Vicinity Report - Radilogical Survey and Sampling - Nov. 4-6, 2015
March 13, 2017, MoDNR's Comment Letter to Respondents' Preliminary Draft Remedial Investigation Addendum (posted 09/15/17)
June 21, 2017, MoDNR's Comment Letter to Respondents' Preliminary Draft of the Final Feasibility Study (posted 09/15/17)
Aug. 30, 2017, MoDNR's Comment Letter to Respondents' Second Draft Remedial Investigation Addendum (posted 09/15/17)
Groundwater Monitoring Report, 2012 Additional Groundwater Sampling Event, West Lake Landfill Operable Unit-1 Prepared for the U.S. Environmental Protection Agency Region 7, Dec. 14, 2012.
Supplemental Feasibility Study- Radiological-Impacted Material Excavation Alternatives Analysis West Lake Landfill Operable Unit Unit-1 - Prepared for the U.S. Environmental Protection Agency Region 7, Dec. 28, 2011.
Work Plan for Supplemental Feasibility Study - Radiological-Impacted Material Excavation Alternatives Analysis West Lake Landfill Operable Unit-1 - Prepared for the U.S. Environmental Protection Agency Region 7, June 4, 2010.
Record of Decision - West Lake Landfill Site, Bridgeton, Missouri Operable Unit-1 - Prepared by the U.S. Environmental Protection Agency, May 2008.
Record of Decision - West Lake Landfill Site, Bridgeton, Missouri Operable Unit-2 - Prepared by the U.S. Environmental Protection Agency, July 2008.
FUSRAP North St. Louis County Haul Road Sampling Results Eberline Services/Oak Ridge Laboratory, Oak Ridge, TN. September/October, 2005.
EPA Announces Public Meeting West Lake Landfill Superfund Site, Bridgeton, Missouri, U.S. Environmental Protection Agency, January, 2013.
Update on Activities Supporting the Record of Decision (ROD) Amendment for the West Lake Landfill Superfund Site, Bridgeton, Missouri U.S. Environmental Protection Agency, November 2012.
West Lake Landfill Information Sheet Missouri Department of Natural Resources, March 2012.
Community Involvement Plan (Update) West Lake Landfill Superfund Site, Bridgeton, Missouri, U.S. Environmental Protection Agency, October 2011.
The administrative record includes site work plans, sampling results, technical reports, fact sheets and other site updates. It also includes the community involvement plan and general information about the Superfund program. The administrative record includes all documents and data used and produced during the site investigation phase to develop cleanup alternatives for the site.
The administrative record is available at:
Bridgeton Trails Branch of the St. Louis County Library
3455 McKelvey Road
Bridgeton, MO 63044
Hours: Monday through Thursday 9 a.m. to 9 p.m., Friday and Saturday 9 a.m. to 5 p.m. and Sunday from 1 to 5 p.m.
Additional Site Information:
Bridgeton Sanitary Landfill Facility Information