Operable Unit 1: In September 2018, the EPA announced the amended remedy decision for the Westlake Landfill Operable Unit 1 (OU1). The Amended Remedy includes partial excavation with off-site disposal and an engineered cover placed over the landfill when excavation is complete.
| City | Bridgeton |
|---|---|
| County | St Louis County |
| State | Missouri |
| Coordinates | 38.77000, -90.44527 |
Westlake Landfill is a federal Superfund site in Missouri. The Superfund program, created by Congress in 1980, addresses sites where hazardous substances have been released or threaten release into the environment. EPA scores potential sites using the Hazard Ranking System; those that score high enough are placed on the National Priorities List.
Current status: Remedy selected. EPA has selected a cleanup remedy but construction has not yet begun. The remedy selection process involves a feasibility study, public comment period, and a Record of Decision documenting the chosen approach.
EPA has identified 10 contaminants of concern at this site, including 1,1-dichloroethane, 1,4-dichlorobenzene, actinium-227. Contamination has been detected in solid waste, soil, groundwater, landfill gas.
If you live near this site and have health concerns, your state health department can provide site-specific guidance. EPA maintains a community involvement program for most NPL sites, and site documents — including the Record of Decision, five-year reviews, and public health assessments — are typically available through EPA's Superfund site profile.