The Department has adopted a plan regarding the clean-up of Operable Unit 1 (OU-1) the 516 North King Street & Alico Road Site located in Wilmington. The Site has had various uses including the Customs House which was constructed in the mid-1800s for use as the U.S. Customs Department and U.S. Judiciary Department. The Site requires the submittal of a Remedial Action Work Plan which specifies the methods to be used to remediate OU-1 including the design and installation of a passive vapor mitigation system of the existing and proposed new building; development and compliance with the Contaminated Materials Management Plan (CMMP); the recording of an Environmental Covenant restricting use to non-residential type and compliance with the Contaminated Materials Management Plan (CMMP) as well as the Long-Term Stewardship (LTS) Plan; completion of a CMMP and LTS Plan; abandonment and closure of on-site soil gas sampling points once no longer in use; and the submittal of a Remedial Action Completion Report.
DNREC issued a public notice of the Proposed Plan for OU-1 of the 516 N. King St & Alico Rd Site on June 11, 2023. There were no comments or questions from the public regarding the Proposed Plan. Details of the Final Plan are available online at: den.dnrec.delaware.gov
For additional information, please contact Morgan McGee-Solomon, Project Manager at (302) 395-2600 or via email at DNREC_WHS_REMEDIATIONINBOX@delaware.gov