If your facility operates a regulated underground storage tank (UST) system in Massachusetts, staying compliant with Mass DEP regulations is not optional—it’s a requirement. In 2012, the Massachusetts Department of Environmental Protection (Mass DEP) updated 310 CMR 80 to establish clear roles and responsibilities for certified UST operators. These operators are designated as Class A, B, and C Operators, and for regulated tank systems, all three classes are required.

Here’s a breakdown of the duties for each UST operator classification:

Class A Operators

A Class A Operator is responsible for the overall operation and compliance of the UST system. This role requires a broad understanding of UST regulations, including but not limited to:

• Tanks and piping systems
• Leak detection methods
• Spill and overfill prevention
• Emergency response protocols
• Regulatory reporting requirements

The Class A Operator ensures that the facility is operated by properly trained staff and that the UST system meets compliance requirements. They must also make records and documentation available to the Mass DEP upon request.

Class B Operators

The Class B Operator has a more hands-on role with daily UST operations and maintenance. This position requires in-depth technical knowledge of UST systems, including:

• Tank and piping components
• Regulated substances stored
• Corrosion protection measures
• Testing and inspection requirements
• UST closure procedures
• Training responsibilities for Class C Operators

Class B Operators are in charge of implementing daily operation procedures, performing inspections, maintaining records, and ensuring ongoing compliance with Mass DEP 310 CMR 80 regulations.

Becoming a Class A or B Operator

To become a certified Class A or B UST Operator, individuals must complete approved training and pass a state-mandated examination in accordance with 310 CMR 80.37 (7)(e)-(g).

Class C Operators

The Class C Operator is typically the on-site employee responsible for responding to emergencies. Their duties include:

• Knowing the layout of the UST system
• Recognizing alarm conditions
• Taking immediate action during emergency situations

Class C Operators must be trained by a certified Class A or B Operator. Their training is site-specific and includes how to identify leaks, respond to alarms, and take appropriate emergency actions.

UST Inspection Requirements

To remain compliant with 310 CMR 80.35, UST systems must undergo periodic inspections performed by a certified Class A/B Operator. While some components need to be inspected every 30 days, more in-depth inspections are required every 90 days and annually.

Each inspection must include a checklist of critical tank components and maintenance records. These inspection reports must be retained by the facility for a minimum of 4 years and be made available to the Mass DEP upon request.

Professional UST Operator Services in Massachusetts

No matter what company you choose to provide your monthly A/B inspections, always ensure your inspections are being performed by a certified A/B Operator. At Petroleum Management Services, Inc., we provide fully licensed and certified Class A/B UST Operators to help manage and maintain your underground storage tank system. Our team performs all required periodic inspections and maintains detailed compliance records on your behalf.

We also offer free tank inspection record-keeping and compliance tracking to all clients using our A/B Operator services. In addition, our experienced operators provide Class C Operator training, customized to your specific facility and staff.

When you partner with us, you can focus on managing your business while we ensure your UST system remains compliant and properly maintained.

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Ready to Simplify Your UST Compliance?

Contact Petroleum Management Services today to learn more about our UST inspection services, operator training programs, and how we can help you maintain full compliance with Massachusetts UST regulations.

Call us today or email us for more information.

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For full details on operator responsibilities, refer to 310 CMR 80 on the Mass DEP UST Program website.