California ICC UST Service Technician Practice Exam

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Monthly monitoring data must be kept on file for what duration?

  1. 2 years

  2. 3 years

  3. 5 years

  4. 6 years

The correct answer is: 3 years

Monthly monitoring data must be retained for three years because this duration is aligned with regulatory requirements, such as those set by the United States Environmental Protection Agency (EPA) and the California Department of Toxic Substances Control (DTSC). This retention period ensures that records are available for review and compliance verification, which is critical for maintaining safety and environmental protections when managing underground storage tanks (USTs). Keeping the data for this specified duration also helps facility operators track their monitoring efforts, identify any potential leaks or failures, and maintain accountability in environmental stewardship.

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