MassDEP UST Third-Party Inspector Certification

This program ensures that those responsible for inspecting UST systems in Massachusetts have the necessary qualifications and experience.
Qualified individuals are certified for five years and need to apply for renewal at least 90 days before their current certifications expire.

MassDEP Bureau of Air & Waste: Underground Storage Tank Program

The Details of MassDEP UST Third-Party Inspector Certification

How to submit MassDEP UST Third-Party Inspector Certification

See details below.

Next steps for MassDEP UST Third-Party Inspector Certification

  1. What to Know

    The Department of Environmental Protection (MassDEP) Underground Storage Tank (UST) Third-Party Inspector (TPI) Certification Program ensures that those responsible for inspecting UST systems have the necessary qualifications and experience.

    Qualified individuals are certified for five years and need to apply for renewal at least 90 days before their current certifications expire. 

  2. Meet Minimum Eligibility Criteria

    To qualify for MassDEP certification as a UST Third-Party Inspector, you must document that you:

    • Have a minimum of five (5) years of experience in the field of UST installation and/or operation and maintenance. (you may substitute a bachelor's or associate's degree in science or engineering for two (2) years of experience); and
    • Either (1) assisted a registered/certified third-party inspector perform at least ten inspections within the past three years, or (2) hold a third-party inspector certification from another state and have performed a minimum of ten third-party inspections in that state within the past three years.
  3. Take & Pass the MassDEP Exam

    Visit this web site and follow the prompts to register, pay the exam fee of $75, and take your exam.

    • If you are a new user, you will need to create an account first.
    • Exams are available online 24 hours a day and are "open book," but must be completed in one sitting and within the allotted running time.
    • Computer support is available at all times.
    • Your results will displayed immediately after you answer the last question or run out of time. 
    • MassDEP will receive your results from the exam vendor. 
    • This exam is based on the MassDEP regulations.
  4. Document & Submit Your Credentials

    Complete the form below and email it as an attachment, along with your test scores and other required documentation to: dep.ust@state.ma.us

    You may fill out and save the Microsoft Word form on your computer. The PDF version has to be printed out and completed by hand.

  5. Maintain Your Certification

    Once MassDEP issues you a TPI Certification:

    • Your certification belongs to you, not to your employer.
    • You will be required to attend MassDEP-sponsored annual training.
    • You must perform inspections according to the provisions of 310 CMR 80.48(10) and 310 CMR 80.49.
    • You must renew your certification every five years.

Contact for MassDEP UST Third-Party Inspector Certification

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