How long does the site assessor have to sign the UST decommissioning checklist following completion of a UST installation, retrofit, decommissioning, or test?

The correct timeframe for a site assessor to sign the UST decommissioning checklist following the completion of a UST installation, retrofit, decommissioning, or test is 30 days. This requirement ensures that the necessary inspections and reviews are conducted in a timely manner, promoting compliance with regulatory standards and safeguarding public health and the environment. By setting a clear deadline, the regulation helps maintain accountability for site assessors, ensuring that any issues or concerns related to the UST operations are promptly addressed.

Other timeframes, such as 15 days, 45 days, or 60 days, do not align with the regulatory requirements, as they either do not allow sufficient time for thorough evaluation or extend the period unnecessarily, potentially compromising the integrity of the assessment process. The 30-day requirement strikes a balance, providing adequate time for the assessors to complete their duties while also ensuring swift documentation and processing of UST activities.