Notification of Public Comment for a Brownfield Development Agreement for the 415-427 North Tatnall Street Site, Wilmington (DE-1248)

Division of Waste and Hazardous Substances

Published: July 24, 2022
Comments Due: Aug. 15, 2022

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 Brownfield Development Agreement (BDA). A BDA is an agreement between DNREC and a Brownfield 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) negotiated a BDA with Mariko Ueno regarding the 415-427 North Tatnall Street Site (Site), located at 415-427 N. Tatnall St., Wilmington, Delaware. Identified by New Castle County as tax parcel numbers 26-0.35.30-232, -233, -234, -235, -236, -237, 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:

The public comment period begins on Sunday, July 24, 2022, and will end at the close of business on Monday, August 15, 2022. Please submit written comments to the DNREC-RS Project Manager Tracy Spinden, at DNREC-RS, 391 Lukens Drive, New Castle, DE 19720, or via e-mail to

A copy of the BDA is available by accessing the DNREC-RS’ site files database 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, Tracy Spinden at (302) 395-2600 or