Proposed Plan 0f Remedial Action for 429 South Governors Avenue Site (DE-1792)

Division of Waste and Hazardous Substances

Published: June 26, 2022
Comments Due: July 18, 2022

The Department invites public comment on a proposal to clean-up the 429 South Governors Avenue Site (DE-1792) located at 429 South Governors Avenue in Dover. The Site is currently vacant but in the past was used as dentist office.

The proposed remedial actions for the Site include: Environmental Management During Construction- Develop and implement a Contamination Material Management Plan (CMMP); Vapor Mitigation System; Institutional Controls- placement of an environmental covenant limiting groundwater withdrawal and compliance with the CMMP and (Long-Term Stewardship (LTS) Plan; LTS Plan to monitor air to ensure that vapor migration system is effective and Remedial Action Completion Report.

Details of the Proposed Plan are available online at:

The comment period ends on July 18, 2022. For additional information, please contact Rick Galloway, Project Manager at (302) 395-2600 or via email at