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 Tank Management Section


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The Division of Waste and Hazardous Substances' Tank Management Section (TMS) regulates the installation, operation, maintenance, and closure of Underground Storage Tank and Aboveground Storage Tank (UST and AST) systems in order to prevent contamination of soils and groundwater. The staff also permits the installation and operation of Vapor Recovery (VR) equipment, inspects Boilers and Pressure Vessels to protect public safety, and oversees the cleanup of releases from both UST and AST systems. The TMS prevents leaks to the environment by conducting inspections at regulated UST and AST facilities to ensure equipment is properly installed and maintained. These inspections take place at different types of facilities including gas stations, facilities that have large tank systems, and industrial or manufacturing sites located in Delaware. The TMS office is located in DNREC's Lukens Drive Field Office building at 391 Lukens Drive, New Castle, DE 19720 (Map & Driving Directions). Phone: (302) 395-2500.

UPDATE: DNREC finalized amendments to the AST Regulations effective April 1, 2017. The new regulations are available here.

ADVISORY: DNREC has been working with the Underground Storage Tank Advisory Committee (USTAC) to develop amendments to Delaware’s Underground Storage Tank Regulations. For questions, or to provide feedback on the most recent draft of the amendments, please send an email to Meeting materials from previous meetings, as well as the most recent version of the draft changes to the Underground Storage Tank Regulations, can be found here.

UST CLOSURE ASSISTANCE: DNREC's Heating Fuel Underground Storage Tank Closure Assistance Program for heating fuel UST systems of 1,100 gallons or less used to store fuel to heat the premises where they are located.  

Quick links for frequent users:

UST Program AST Program
Underground Storage Tank Owner/Operator                    Financial Responsibility/Insurance
Homeowner Realtor


UST Operator Training
Select scanned Facility Files are available through
the Delaware Environmental Navigator.
A-Z List of Documents
Contractor Information
UST Advisory Committee

To report a release, please call: 1-800-662-8802

The Tank Management Section also oversees or conducts the investigation and clean up of petroleum and chemical contamination when spills and releases occur on properties with UST or AST systems. The TMS maintains and makes available upon request information stored in paper files and electronic databases relating to USTs, ASTs, and Boilers. Additionally, the TMS provides financial assistance through various programs for the removal of tanks and required cleanup. This includes managing the use of state funds dedicated to the removal and cleanup of UST systems where the owner cannot be found, refuses to perform the work, or does not have the ability to pay.

The Boiler Safety Program is also part of the TMS, ensuring public safety in all public and municipal buildings through inspections of boilers and pressure vessels and by providing education on the operation, maintenance, and repair of boilers and pressure vessels in the State of Delaware.

The TMS staff provides outreach and education by phone, newsletter, website, and presentations to specific groups regarding program activities and requirements.   

To sign up for the Tank Management Section's ListServe, please send a blank email to: 

For more information on the Tank Management Section's Notification and Soil Sampling Guidance, effective Oct. 1, 2012, please visit: Think Tank


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