Notification of Negotiations for a Brownfields Development Agreement for the 320 South Market Street, Wilmington Site, (DE-1761)

Division of Waste and Hazardous Substances

Published: April 4, 2021

Pursuant to the Hazardous Substance Cleanup Act (HSCA), 7 Del. C. Chapter 91, §9126, the Department of Natural Resources and Environmental Control (DNREC) is required to issue a public notice within twenty days after entering into negotiations for a Certified Brownfields Development Agreement (BDA). A BDA is an agreement between DNREC and a Certified Brownfields Developer with respect to a Certified Brownfield Site that sets forth a scope of work and schedule of remedial activities during the development of the Site.

DNREC’s Remediation Section (DNREC-RS) is negotiating a BDA with CSW Arbour Square VII Wilmington, L.P. regarding the 320 South Market Street (Site), located at 320/340 South Market Street, Wilmington, Delaware. Identified by New Castle County as tax parcel numbers 26-050.00-014 and 26- 050.00-015 the Site may have had a release of hazardous substances as a result of historical activities on site. For more information, please see DNREC’s navigator at:

Learn more about this Site and other Certified Brownfield sites by accessing the web page at or by contacting the DNREC-RS Project Manager, John Costa at (302) 395-2600 or