Statement of Basis for Corrective Action at Dupont Experimental Station

Division of Waste and Hazardous Substances

Published: Oct. 12, 2022
Comments Due: Nov. 28, 2022

The Delaware Department of Natural Resources and Environmental Control (DNREC), Remediation Section (RS) has issued a Statement of Basis (SB) for Corrective Action at the DuPont Experimental Station Facility located in Wilmington, Delaware. This document summarizes DNREC’s proposed recommendations for the DuPont Experimental Station Facility at 200 Powder Mill Road in Wilmington, Delaware.

Documentation has demonstrated that the current permitted Hazardous Waste Storage and Treatment facility units have met closure performance standards. DNREC proposes to continue corrective actions in the form of an environmental covenant per the Uniform Environmental Covenant Act (UECA) at the locations of Areas of Concern (AOCs) at this facility.

Details of the Statement of Basis are available online at:

Persons wishing to comment upon the Statement of Basis are invited to submit written comments. The written comments must be received no later than close of business November 28, 2022. For additional information, please contact Wendy March, Project Manager at (302) 739-9403, or via email at

All written comments received prior to the end of the forty-five (45) day comment period will be considered when formulating the final determination. A public hearing may be held if DNREC receives a meritorious request for a hearing prior to, Monday, November 28, 2022, deadline, or if the Secretary deems it to be in the best interest of the State to do so.

Documents For Review

Fact Sheet (Oct. 2022)

  1. Fact Sheet
  2. Fact Sheet Figures

Administrative Record

  1. Facility Incinerator Closure Report (Feb. 2022)
  2. Parking Lot 1 Post-Excavation Summary for Areas SB-01 and SB-03 (March 2021)
  3. Facility Incinerator Waste Storage Pads A, B, C, D, E, F, G, 23, 24, and 24-0 Closure Report (Feb. 2021)
  4. Parking Lot 1 Confirmation and Delineation Soil Sampling Report (March 2020)
  5. Soil Remediation Plan for Parking Lot 1 at the DuPont Experimental Station (Feb. 2020)
  6. Parking Lot 1 Summary Remediation Plan for Areas SB-01 and SB-13 (Jan. 2020)
  7. Corrective Measures Study (July 1991)
  8. RCRA Facility Investigation, DuPont Experimental Station. Draft Final Report (July 1990)