Keith

Field repair begins with locating the leak source such as gaskets, valves, radiators, weld seams, or bushing interfaces. The area is cleaned, oil level is managed to reduce pressure at the leak point, and temporary containment is placed to prevent environmental release. Repairs may include tightening flanges, replacing gaskets, resealing fittings, applying approved sealants for minor seepage, or welding for structural defects during an outage. After repair, oil level is restored, air is removed if needed, and oil is sampled to confirm moisture and dielectric condition remain acceptable.

Dielectric tests are performed during commissioning, after oil treatment, following repairs, after transportation, and periodically during service. Testing is also required when moisture ingress or abnormal operation is suspected.

The priority is containment to stop migration. On soil, responders build berms, deploy absorbent pads, and excavate contaminated material for disposal or treatment. If oil reaches water, booms are placed to contain the slick and skimmers or absorbents are used for recovery. Storm drains are blocked and runoff is controlled. Samples of soil and water are collected to define the affected area. Notifications to environmental authorities are typically required and remediation must follow approved plans and cleanup standards.