A central issue during the Deepwater Horizon oil spill was the estimation of the volume of oil released. Scientists and staff at the Woods Hole Oceanographic Institute (WHOI) were called upon by both BP and the US Coast Guard, which requested help in analyzing the spill, and providing an estimate of the oil released was one of the important tasks they took on. Ultimately, WHOI researchers published an estimate of the spill that placed its total volume at about 4.9 million barrels.
As part of the ongoing lawsuit brought by the US government, BP’s financial liability hinges partially (but crucially) on that number, and the company has been insisting that the true size of the release was smaller. In December, BP subpoenaed the WHOI researchers for the raw data and methods behind their estimate. (WHOI is not a public institution, so the Freedom of Information Act does not apply.) After the researchers complied, BP further demanded any related e-mails, notes, and manuscript drafts—specifically “…any transmission or exchange of any information, whether orally or in writing, including without limitation any conversation or discussion…” applicable to the project. WHOI unsuccessfully challenged those requirements, and was forced to turn over the materials last Friday.

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