Remote operated vehicles (ROV) investigating the recurring sheen near the MC 252 wellhead concluded operations Saturday, Dec. 15, 2012. ROVs inspected the sunken Deepwater Horizon Platform wreckage and the surrounding area.

No sources of leaking oil were identified. During operations, an unidentified substance inconsistent with oil was seen emitting from several areas of the rig wreckage, and samples were collected for further lab analysis.

“No apparent source of the surface sheen has been discovered by this effort,” said Capt. Duke Walker, Federal On-Scene Coordinator for Deepwater Horizon. “Next steps are being considered as we await the lab results of the surface and subsurface samples and more detailed analysis of the video shot during the mission."

Out of an abundance of caution, the Macondo wellhead was also observed and, as expected, was found to be secure. On September 19, 2010 the well was closed off and cemented.

Satellite surveillance will continue to monitor the sheen while future steps are being considered.

The real time ROV operations were observed remotely by the Coast Guard, Bureau of Ocean Energy Management, Bureau of Safety and Environmental Enforcement, BP, Transocean and state on‐scene coordinators from Louisiana, Mississippi and Florida. Additionally, the Coast Guard had observers onboard the Olympic Triton which launched and controlled the ROVs during the operation.

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