EPA RCRA ID: PAD068730225
On this page:
- Cleanup Status
- Facility Description
- Contaminants at this Facility
- Institutional/Engineer Controls
- Enforcement and Compliance
- Related Information
- Contacts for this Facility
Cleanup Status
Note: The EPA is the lead agency for managing cleanups at this facility.
The final remedy for the facility is complete and consists of a Technical Impracticability (TI) Zone for contaminated groundwater beneath portions of the Central Plant/Styrene II and Over-The-Hill Areas, monitored natural attenuation outside the TI Zone, the establishment of a groundwater monitoring program for the Central Plant/Styrene II Area and the former waste disposal areas, and the implementation of engineering and institutional controls summarized below and described in more detail in the Statements of Basis for the active and inactive portions of the facility. The Final Decision to implement the final remedy for the inactive portion became effective on September 28, 2018, and the Final Decision to implement the final remedy for the active portion became effective on January 29, 2019.
On October 4, 2024, the EPA conducted a Long Term Stewardship assessment to assess whether the remedy was implemented and protective of human health and the environment. .
Cleanup Background
Several investigations of the facility have been conducted with PADEP oversight. Remedial investigations and risk assessments for each of the areas were completed in the 1990s and led to final reports and releases of liability under the Act 2 program for each of the six areas between 1999 and 2001. Air sparging and soil vapor extraction remedial systems operated for two years in the Central Plant and Over-The-Hill Areas. Raccoon Creek and East and West Landfill Areas were capped with a soil and vegetation cover, and mercury-contaminated soil from the Phthalic Anhydride Plant Area was excavated and disposed of off-site.
An environmental covenant was recorded for the inactive portion of the facility in 2014 that codified several restrictions detailed further below under “Institutional and Engineering Controls”.
Results from groundwater sampling in the East Landfill Area in 2014, the Central Plant/Styrene II Area in 2016, the Over-The-Hill Area from 2010 to 2016, and the Raccoon Creek Area from 2015 to 2016 suggest that contaminant levels in groundwater are stable or decreasing. Results from River Wells along the Ohio River bank and surface water and sediment sampling of Raccoon Creek in 2016 suggest that surface water is not impacted above protective levels, although some impact to Raccoon Creek sediments from heavy metals was noted.
Cleanup Actions or environmental indicators characterizing the entire facility are shown below. It is not intended as an extensive list of milestones/activities. This listing, and all the data on this page, come from EPA’s RCRAInfo and are refreshed nightly to this page. For this table and the Cleanup Activities Pertaining to a Portion of the Facility table that follows, a blank in the Status column could mean the action either has not occurred or has not been reported in RCRAInfo.
Cleanup Activities Pertaining to the Entire Facility
| Action | Status | Date of Action |
|---|---|---|
| Human Exposure Under Control Human Exposure Under Control(CA725) | ||
| Groundwater Migration Under ControlGroundwater Migration Under Control (CA750) | ||
| Remedy DecisionRemedy Decision (CA400) | ||
| Remedy ConstructionRemedy Construction (CA550) | ||
| Ready for Anticipated Use Ready for Anticipated Use (CA800) | ||
| Performance Standards AttainedPerformance Standards Attained (CA900) | ||
| Corrective Action Process TerminatedCorrective Action Process Terminated (CA999) |
For definitions of the terms used, hover over or click on the term.
Cleanup Activities Pertaining to a Portion of the Facility
| Action | Area Name | Date of Action |
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For definitions of the terms used, hover over or click on the term.
Facility Description
Link to a larger, interactive view of the map.
The former ARCO Chemical facility is located on an approximately 420-acre plot of land on the south bank of the Ohio River in Potter Township, Beaver County, Pennsylvania. The facility was initially constructed in 1942 by Koppers United Company on behalf of the US government. Processes at the facility at this time focused on manufacturing organic chemicals used to make synthetic rubber. In the 1940s-50s, Koppers used the facility for the manufacture of polystyrene and Dylite (expandable polystyrene). Although the manufacturing of polystyrene and expandable polystyrene has been ongoing since that time, the facility has had many owners: Sinclair-Koppers in the 1960s, ARCO from the 1970s to the 1990s, and NOVA Chemicals from 1996 to the present. ARCO retained ownership of the four inactive areas of the facility (described below) until 1998 when ARCO was sold to Lyondell Chemical Company, who then became owner of the inactive areas. The inactive areas of the facility were owned by the Lyondell Environmental Custodial Trust as a result of Lyondell’s 2009 bankruptcy until December 2017, when the Beaver County Corporation for Economic Development purchased the East Landfill Area and Phthalic Anhydride Area. The Lyondell Trust continues to own the West Landfill/Dravo Quarry Area and the Raccoon Creek Area.
For remedial purposes, the facility was broken into six different areas: the Central Plant/Styrene II Area (71 acres) and the surface impoundments and wastewater treatment plant in the Over-The-Hill Area (12 acres) are the two areas still operational; the Raccoon Creek Area (18 acres), West Landfill/Dravo Quarry Area (14 acres), East Landfill Area (54 acres), and Phthalic Anhydride Plant Area (4 acres) are all inactive areas.
Contaminants at this Facility
Primary contaminants include benzene, toluene, ethylbenzene, xylenes, and styrene (BTEXS). Soil and groundwater are the primary media impacted by the contaminants. Potentially complete exposure pathways to this contamination include vapor intrusion from groundwater and soil contamination into the indoor air of occupied on-site buildings, direct contact of contaminated soil or groundwater during intrusive operations, and direct contact and/or ingestion of contaminated sediment or surface water. However, none of these exposures are likely to be significant; see human exposures environmental indicator under “ Documents, Reports and Photographs” for more information.
Institutional and Engineering Controls at this Facility
The 2014 environmental covenant covering the inactive portion of the facility restricts land to non-residential purposes; prohibits use or consumption of groundwater or Raccoon Creek surface water (within Facility boundary); requires O&M of engineered structures including fences, capped areas, and stormwater management devices; and prohibits excavation or construction within capped and other areas without prior agency approval. For more information, see the covenant under “Reports, Documents, and Photographs”.
Engineering controls for the active portion of the facility will include a soil management plan covering any intrusive operations conducted within the TI Zone, and institutional controls restricting land use to non-residential purposes, prohibiting use or consumption of groundwater, and requiring further evaluation or mitigation of vapor intrusion prior to any building construction will be required.
Institutional and Engineering Controls help ensure human exposure and groundwater migration are under control at a cleanup facility. Where control types have been reported by states and EPA in EPA’s RCRAInfo, they are shown below. Not all control types are needed at all facilities, and some facilities do not require any controls. Where there are blanks, the control types may not be needed, may not be in place, or may not be reported in RCRAInfo.
Are Controls in Place at this Facility?
|
Control(s) Type |
Control(s) in Place? |
Areas Subject to Control(s) |
Documents available on-line: |
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|---|---|---|---|---|
|
Institutional ControlsNon-engineering controls used to restrict land use or land access in order to protect people and the environment from exposure to hazardous substances remaining in the site/or facility. (CA 772) |
Informational DevicesInformational Devices (ID) |
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Governmental Controls (GC) |
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Enforcement and Permit Tools (EP) |
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| Proprietary ControlsProprietary Controls (PR) | ||||
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Engineering ControlsEngineering measures designed to minimize the potential for human exposure to contamination by either limiting direct contact with contaminated areas or controlling migration of contaminants. (CA 770) |
Groundwater ControlGroundwater Control (GW) |
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Non-Groundwater |
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For definitions of the terms used, hover over or click on the term.
Enforcement and Compliance at this Facility
EPA’s Office of Enforcement and Compliance Assurance (OECA) provides detailed historical information about enforcement and compliance activities at each RCRA Corrective Action Site in their Enforcement and Compliance Historical Online (ECHO) system.
RCRA Enforcement and Compliance Reports from ECHO
Related Information
For more information about this facility, see these other EPA links:
- RCRA information in EPA’s Envirofacts database
- Information about this facility submitted to EPA under different environmental programs as reported in EPA’s Facility Registry Services
- Alternative Names for this facility as reported by EPA programs in EPA’s Facility Registry Services
- Cleanups in My Community provides an interactive map to see EPA cleanups in context with additional data, and lists for downloading data
- Search RCRA Corrective Action Sites provides a search feature for Corrective Action Sites
Documents, Photos and Graphics
Contacts for this Facility
EPA Region implements and enforces the RCRA Corrective Action program for and federally recognized tribes.
For further information on this corrective action site, use the Contact Information for Corrective Action Hazardous Waste Clean Ups listings that are accessible through Corrective Action Programs around the Nation.