Which documents must be maintained for a minimum of 5 years post-servicing?

Calibration and maintenance documentation must be maintained for a minimum of five years post-servicing because it provides critical information about the operational integrity and safety of underground storage tanks (USTs). This documentation includes records of the procedures followed, the results of inspections, and any adjustments made to the equipment to ensure it operates within regulatory standards.

Maintaining this documentation is vital for compliance with environmental regulations and helps in demonstrating due diligence regarding the ongoing safety and effectiveness of UST systems. Furthermore, having a comprehensive record of calibration and maintenance efforts is essential during regulatory inspections or when addressing any disputes regarding UST operations.

While training records, incident reports, and permits are also important in their own right, they pertain to different aspects of fuel storage and handling management, which might have varied retention requirements based on specific regulations or internal policies.