What is the inspection frequency for Class 1 and 2 line locations not associated with Highway and RR crossings?

The specified inspection frequency of 15 months, with at least one scheduled occurrence within a calendar year, aligns with regulations and guidelines for Class 1 and Class 2 pipelines that are not situated near highway or railroad crossings. This frequency is designed to balance thorough monitoring with the understanding that these locations may pose a lower risk compared to areas near significant infrastructural intersections, such as highways and railroads.

The 15-month timeframe allows operators to conduct scheduled inspections that can help identify potential issues while ensuring compliance with federal safety standards. A minimum requirement of inspecting at least once a year ensures that any changes in the pipeline's condition are observed within a reasonable interval, reducing possible risks associated with environmental factors or wear over time.

Other choices reflect different frequencies of inspection that do not align with the established guidelines for Class 1 and 2 pipelines not associated with critical crossings, indicating that they may not provide the necessary oversight to ensure pipeline integrity and safety efficiently.