Proposed Plan of Remedial Action for W. B. Clerk Co. Morocco Manufacturer (DE-1234)

Division of Waste and Hazardous Substances

Published: Jan. 8, 2023
Comments Due: Jan. 30, 2023

The Department invites public comment on a proposal to clean-up W. B. Clerk Co. Morocco Manufacturer (DE-1234) located in the vicinity of N Walnut St and E 9th St in Wilmington. The Site historically operated as a tannery where the use of arsenic compounds resulted in impacts to site soils.

Impacted site soils are to be excavated to the extent feasible and areas currently capped with impervious surfaces are to remain intact until such time that the potentially contaminated soils are excavated or samples indicate the cap is no longer required. Remaining site soils will be managed through a contaminated materials management plan and a long-term stewardship plan.

Details of the Proposed Plan are available online at:

The comment period ends on January 30, 2023. For additional information, please contact John Costa, Project Manager at (302) 395-2600 or via email at