Underground Storage Tank (UST) Program

Office of Tank Tester Licensing Program

The State Water Resources Control Board (State Water Board) Office of Tank Tester Licensing (OTTL) administers the Tank Tester Licensing Program to protect human health and the environment by establishing minimum qualifications for those who test underground storage tanks and associated piping. The State Water Board OTTL licenses and regulates tank testers under the provisions of Health and Safety Code, Chapter 6.7, Section 25284.4, and the California Code of Regulations (CCR), Title 23, Division 3, Chapter 17, Sections 2730 through 2802.