How is the line inspected, and how often? We do not seem to have routine ground patrols and minimal air patrols?
A. Dominion’s TL-522 is patrolled via BOTH ground and air patrols. The frequency of patrols is prescribed by CFR 49, Part 192. We are required to patrol our pipeline in the White Sands area at least twice per calendar year, and at an interval not to exceed 7½ months. We are required to inspect the road crossings at least four times per calendar year, and at an interval not to exceed 4½ months. In addition, we are required to conduct leakage surveys on the same frequency as the pipeline patrol (twice per year). Leakage surveys are conducted in conjunction with patrols. However, Dominion exceeds these frequencies in performing its patrols of the pipeline through the White Sands area. In addition to regular patrols, Dominion personnel inspect the right-of-way as we perform required cathodic protection inspections and Miss Utility investigations.
