Guide MassDEP Underground Storage Tank (UST) Program

The Department of Environmental Protection (MassDEP) regulates the registration, installation, operation, maintenance, closure, and inspection of petroleum fuel and hazardous substance UST systems.

News & Updates

Single-Walled Steel Tank Requirements
All single-walled steel tanks had to be removed or permanently closed in-place by August 7, 2017. 

Enforcement Discretion: Tightness Testing, September 2017 (PDF)
Until further notice, MassDEP will not enforce the tank and piping tightness testing standard scheduled to take effect on January 1, 2018.

Enforcement Discretion: Installation Testing, May 2017 (PDF)
Until further notice, MassDEP will not enforce the requirement for piping to be tested before putting regulated substance in the tank.

Frequently Asked Questions: 310 CMR 80.00 (PDF)
Fact sheet on the MassDEP regulations.

Underground Storage Tanks on the Classic MassDEP Web Site

Facility Owners & Operators

UST Owner & Operator Information
Compliance and reporting requirements, third-party inspections, what to do if you find a leak and more.

Login: UST Data Management/Online Filing System
For owner and operator registration and reporting. If you are a new user, you will need to create an account first.

Summary of UST System Financial Responsibility Requirements (PDF)
UST owners/operators need to demonstrate sufficient financial resources to pay for environmental and other damages if their tanks release a regulated substance.

UST Operator Certification Program
Each UST system must have at least one designated Class A, B and C Operator. Learn how to get certified.

List of MassDEP-Certified UST System Operators (PDF)
List of individuals who have passed their operator certification exams.

Third-Party Inspections & Inspectors

Third-Party UST Inspection Program
UST owner/operators must have their tanks inspected every three years by MassDEP-approved third parties.

MassDEP Third-Party Inspector Certification
This program ensures that tho who inspect UST systems have the necessary knowledge and understanding of how these systems work. 

Third-Party Inspector Search
A searchable, sortable public database of Massachusetts-qualified third-party inspectors.

Login: nSPECT Reporting System
Reporting system for third-party inspectors. If you are a new user, you will need to create an account first.

Login: UST Data Management/Online Filing System
Use this system to look up clients' facility information. If you are a new user, you will need to create an account first.

How to Look Up UST Facility Third-Party Inspection Due Dates (PDF)
Instructions for accessing real-time information via the UST Data Management System.

Online Filing & Forms

UST Online Filing, Forms & Help
Register underground storage tanks with MassDEP, notify the agency of changes in their status, and report the results of third-party inspections.

Login: UST Data Management/Online Filing System
For owner and operator registration and reporting. If you are a new user, you will need to create an account first.

Regulations & Policies

UST Regulations & Policies
MassDEP UST and site/spill assessment cleanup rules, UST closure assessment manual, and more.

Frequently Asked Questions: 310 CMR 80.00 (PDF)
Fact sheet on the MassDEP regulations.

Important UST Compliance Deadlines (PDF)
Know when you need to meet the requirements for upgrading, testing and inspecting specific types of equipment and systems.

Single-Walled Steel Tank Requirements
All single-walled steel tanks had to be removed or permanently closed in-place by August 7, 2017. 

Summary of UST System Financial Responsibility Requirements (PDF)
UST owners/operators need to demonstrate sufficient financial resources to pay for environmental and other damages if their tanks release a regulated substance.

USTs in Massachusetts

Underground Storage Tank (UST) Facility Search
A searchable, sortable public database of underground storage tank facilities in your community and across Massachusetts. 

Summary of Massachusetts UST Information (PDF)
Review MassDEP data on active UST facilities in Massachusetts, UST system inspection findings, and confirmed product releases.

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