EPA RCRA ID: DED003930799
The Resource Conservation and Recovery Act (RCRA) is the public law that creates the framework for the proper management of hazardous and non-hazardous solid waste. Corrective action is a requirement under RCRA that facilities that treat, store or dispose of hazardous wastes, or did so in the past, investigate and clean up hazardous releases into soil, groundwater, surface water and air. For more information, and for more information on RCRA-specific terms used on this page, please visit EPA’s umbrella RCRA web page or EPA’s RCRA Corrective Action page.
On this page:
- Cleanup Activities
- Facility Description
- Institutional/Engineering Controls
- Enforcement and Compliance
- Related Information and Publicly Available Electronic Records
- Contacts for this Facility
Cleanup Activities
The completion of a RCRA Facility Assessment (RFA) represented the first phase of the corrective action program as established by the Environmental Protection Agency (EPA). The purpose of the RFA was to identify and gather information on releases at RCRA facilities; identify, evaluate, and describe Solid Waste Management Units (SWMU) and other areas of concern (AOC); evaluate potential for releases to the environment; and determine the need for further investigation, remedial actions and/or interim measures.
The preliminary review (PR) was performed during February/March 1991; a follow-up corrective action evaluation was completed in May, 2006. The PR included review of numerous state files, including RCRA, CERCLA, Air, Solid Waste, SERT, Soil and Water, Wetlands, Water Resources, Fish and Wildlife, and Public Health. Federal sources of information included EPA Region III in Philadelphia, the United States Geological Survey, and the New Castle County Office of the Soil Conservation Service. After the PR was performed a hazardous release to the environment could not be confirmed.
A meeting was held on April 17, 2008 between DuPont and DNREC to chart a course forward for Chestnut Run. It was agreed upon that the Environmental Indicators would be assessed, and a tour of the site was completed. The following activities were accomplished:
Based on the field investigation and information submitted by the facility concerning past waste practices, DNREC determined that no further corrective action was necessary under the federal RCRA Corrective Action program. The public comment period on the draft proposal ended on September 25, 2009; no comments were received.
The criteria used to analyze the proposed remedy are set forth in an EPA guidance document, "Guidance on RCRA Corrective Action Decision Documents" Directive Number 9902.6, February 1991, and the May 1, 1996 ANPR.
- Toured all old (1991) and new (to May 2006) SWMU’s at the DuPont Chestnut Run facility. SWMU’s 1 – 27 were identified by DNREC in the September 20, 1991 RFA document; numbers 28 – 35 were identified by DuPont from 1991 to May 2006.
- Toured all AOC’s at the DuPont Chestnut Run facility. Three AOC’s were identified by DNREC in September 20, 1991 RFA document.
The Environmental Indicators for Human Health and Ground Water were completed on August 11, 2009.
Based on the field investigation and information submitted by the facility concerning past waste practices, DNREC determined that no further corrective action was necessary under the federal RCRA Corrective Action program. The public comment period on the draft proposal ended on September 25, 2009; no comments were received.
The criteria used to analyze the proposed remedy are set forth in OSWER guidance document, "Guidance on RCRA Corrective Action Decision Documents" Directive Number 9902.6, February 1991, and the May 1, 1996, ANPR.
DNREC issued a Statement of Basis (SB) for conducting RCRA – No Further Action (NFA) activities at the facility. DNREC solicited comments from the public on the SB; the public comment period ended on September 25, 2009. No comments were received during the 45 day comment period. The Record of Decision was signed on September 30, 2009.
Cleanup Actions or environmental indicators characterizing the entire facility are shown below. This listing, and all the data on this page, come from EPA’s RCRAInfo and are refreshed nightly to this page. For this table, 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 |
|---|
For definitions of the terms used, hover over or click on the term.
Facility Description
Link to a larger, interactive view of the map.
DuPont owns the multi-departmental research facility known as the Chestnut Run Plaza. This facility is located along route 141 and Lancaster Pike in Wilmington, Delaware. The site consists of 19 buildings on approximately 240 acres. The wastes generated on site were the result of product development. Wastes were generated in small, irregular batches consisting of small packages of discarded laboratory chemicals, small sample mixes, and excess and spent batches used in machine applications and discarded test products. Most of the site chemical wastes were innocuous and non-hazardous, as they stem from activities relating to finished products in the consumer trade. The hazardous wastes were principally organic spent solvents from non-specific sources, plus various characteristic wastes and lab packs. Wastes were stored and shipped for the most part in bung and open top 55-gallon steel drums. Occasionally, smaller lots of specialized wastes were shipped in small cartons or less than 55-gallon steel or fiber drums.
The hazardous wastes were principally organic spent solvents from non-specific sources, plus various characteristic wastes and lab packs. Wastes were stored and shipped for the most part in bung and open top 55-gallon steel drums.
Institutional and Engineering Controls at this Facility
No institutional or engineering controls were required at the facility.
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) |
|
|---|---|---|---|
|
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 and Publicly Available Electronic Records
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.